Health and Fitness Research Paper Essay Example

Health and Fitness Research Paper Essay During their early adultness – the age from 20 to 40 – most people enjoy the height level of energy, strength, and endurance in comparison with the people of other age-related groups. It is an average expectation for this age. Most cultures take advantages from this age of the highest efficiency, conducting the vocational training using the exhausting systems of the internship, examinations, and research work, sending young people to war, deifying young athletes and models, expecting that women will bear children. The use of free example research paper on health and fitness may give you some advantages in the complex process of writing a successful research paper on the topic. These free samples can be handy when prepared on the high professional level, covering all the important aspects of a given phenomenon. As a rule, the functioning of organs, time of reaction, strength, motor skills, and sensorimotor coordination achieves their culmination at the age from 25 to 30, and they go down gradually after. Nevertheless, the decline of these indexes in the age from 30 to 40 and from 40 to 50 is not so considerable, as most people think it to be. As known, the substantial decline in the functional level of most biological systems appears approximately after 40. We will write a custom essay sample on Health and Fitness Research Paper specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Health and Fitness Research Paper specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Health and Fitness Research Paper specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Thus, although slump after the maximal point of the productivity, appearing approximately in age after 25-30, can be considered for some prominent athletes, it only slightly affects the majority of us. Not all systems, nevertheless, arrive at its maximum in the indicated period. For example, visual accommodation gradually, through evenly, goes down already in middle child’s age. The sharpness of vision weakens very slowly from approximately 20 and then substantially goes down after 40. The decline of physical skills and abilities capabilities is most visible in some critical situations and other extreme cases requiring the maximal concentration of our strength. For example, when a woman is about 40, a pregnancy affects her stamina considerably stronger in comparison to that, when she was 20-30. Also, for senior women, the period of return to the normal state after giving birth to a child can be more protracted. In like manner, for a 25-years-old man, it is easy to have a few jobs simultaneously, to get his family out of a financial crisis, then for 40-years-old. Health and habit to engage in physical exercises, formed in the period of early adultness, is often kept during the following years. Many of these behavioral patterns give useful results. Although the settings and behavior, related to the health and fitness, can change, people are often inclined to resist to such changes, considering especially important to set healthy habits in an early adultness. Are you looking for a top-notch custom research paper about Health and Fitness? Is confidentiality as important to you as the high quality of the product? Try our writing service at EssayLib.com! We can offer you professional assistance at affordable rates. Our experienced PhD and Master’s writers are ready to take into account your smallest demands. We guarantee you 100% authenticity of your paper and assure you of dead on time delivery. Proceed with the order form:

6 outdated career tipsâ€and why they’ve changed

6 outdated career tips- and why they’ve changed You don’t use the phone, watch TV, or dress the same way your parents did when they were your age- so why would you use career advice that has been around just as long (or even longer)? Some pieces of advice in the career world will truly never change: hard work pays off, and you should never get drunk at a company holiday party. Otherwise, things are negotiable. Let’s look at some infamous career advice that might not be so valid anymore. Keep a low profile on your personal life.Advice: Keep your work life and your personal life totally separate, even on social media.What’s changed: Social media like Facebook has evolved over time to include more than your â€Å"friends† per se. Relatives, acquaintances, former dates†¦all show up in your news feed, so why not add coworkers into the mix? Why not even add your boss, if you get along and find her opera singing/supermarathon running/jewelry crafting hobbies interesting? Social media has blurred social li nes a bit and has helped make relationships a bit more informal. When used well, it’s a way to break the ice and build relationships with people you might otherwise only see at work.However, this one does come with a caveat: if you do friend colleagues and managers on social media, set filters or try to keep things clean. Anything you post that can be seen by coworkers becomes fair game. And definitely don’t complain about work if people from work can see it. If you wouldn’t want to see a screenshot of something you wrote land in your work email inbox, don’t write it.And it’s not just social media- socializing with coworkers and sharing (appropriate) details about your personal lives can help you bond and feel more connected to your workplace. Small talk about your weekend or cute pictures of your boss’s kid are not likely to derail your professional relationship or keep either of you from doing the work that needs to be done. And we all nee d allies at work- someone to talk with when things get stressful or with whom you can grab a non-work-related lunch. Chitchat about work-only things will only go so far. You’re much more likely to have good relationships with your coworkers if you can bond over other things you have in common.Keep a strict work-life division.Advice: Don’t even think about work after you leave. Don’t check email after hours. And when you’re at work, don’t do anything personal or non-work related.What’s changed: It’s true, email has helped create â€Å"work creep† that can lead to stress outside of work hours or leave you feeling cheated on your personal time. But like all balances, it’s important to keep negotiating your work-life balance to make sure it still works for you. If it makes your workday better to spend half an hour at night checking a few emails or lining up your to-do list for the next day, do it. If you need a quick break d uring the afternoon to talk to your partner, take it. Keeping a single mindset for eight straight hours is not only difficult, but it can increase your stress. The most important thing is that you’re not letting personal time at work upset your productive time, and that you’re not letting work squeeze out your personal decompression time and priorities.Never show weakness.Advice: If you’re struggling or you don’t fully understand what’s going on, don’t let anyone know. Fake it, or stall until you can straighten it out on your own. Asking for help is a sign of weakness and incompetence.What’s changed: You know what takes a lot of unnecessary time and energy? Faking it. If you don’t understand what needs to be done, ask your manager or someone involved with the task. You shouldn’t lead with, â€Å"Oh man, I have no clue what to do here†- but it’s perfectly all right to say, â€Å"Just so I’m clear her e, this is what I think the next steps are. Can you confirm?† Or â€Å"Can we walk through this again so I understand?† Your manager would rather have a good outcome on a project than a result where you clearly winged it and got things wrong.If you need help, ask for it. Otherwise you risk not being able to bluff your way through as well as you think you can, and wasting both your time and others’. Invest a little time and honesty up front and make it easier on everyone- not least of all yourself. Think of it as a learning opportunity, not a failure.Don’t challenge the boss.Advice: Never challenge your boss on anything. If you don’t agree, just let it go and wait your turn to be the one in charge. After all, she’s the boss for a reason. Do what you’re told, and publicly agree with the official point of view.What’s changed: The manager/employee dynamic hasn’t necessarily changed, but it’s more culturally acceptable now to disagree- albeit diplomatically and productively. This is not to say that you should openly scoff at a particularly ridiculous idea or laugh in your boss’s face when he asks you if you agree about something. Rather, frame it as a respectful difference in point of view. For example: â€Å"I see what you’re saying, but what if we look at it from this other perspective?† Set it as a dialogue instead of just publicly rejecting something your boss has said. Like you, your boss has an interest in making sure things get done in the best way possible, so if you have a difference of opinion that could improve an outcome, don’t be afraid to speak up in a respectful and constructive way.Standard politeness rules apply here as well. Loudly contradicting your boss in a meeting with other people is not likely to go over very well. Nobody likes to be shouted down. But presenting an alternative choice, and acknowledging the validity of what was already said, is a much more productive way to disagree without being rude or unprofessional.Never say â€Å"no.†Advice: Especially when you’re just starting out, always say â€Å"yes† when you’re asked to take on new things or responsibilities. If you say â€Å"no,† you’re not a team player.What’s changed: Saying â€Å"yes† to everything is a shortcut to burnout, and employers have become more conscious of cultivating employee morale. There’s only so much you can handle in the work hours you have available. The better way to handle this is through negotiating and prioritizing. Instead of saying â€Å"I just can’t do this right now,† figure out why you can’t, and ask for help prioritizing tasks if this potential new one is important for you to take on.The key to this one is making sure that your rationale for saying no is a legitimate one. If you just don’t feel like doing it, that’s not going to go over well. But if you genuinely don’t have time, or object for specific reasons, you can be honest about those. Lay out the reasons why, and open a dialogue about how this new ask can or should fit in with your existing workload. It’s always better to have a â€Å"here’s why† list of talking points ready to go, so that your boss doesn’t think you’re lazy, or can’t do the work.Don’t be a job hopper.Advice: Don’t jump from job to job. Settle in and build experience at one job for several years. Job hopping makes you look like an unreliable employee.What’s changed: The world, basically. The job scenario where you start right out of school and stay there for 40 years has become, essentially, a unicorn. The average person now will have eight jobs before they turn 30. And according to the U.S. Bureau of Labor Statistics, employees who are 25 to 34 years old typically stay with a job for three years.Job hopping can be a way t o build your skills and maximize your opportunities instead of staying in a role that may not fit your long-term goals. Job hopping can also mean moving to different jobs within the same company if you find other roles that fit better. While switching jobs every year for the next 15 years is not an ideal strategy (that might truly start to send up red flags for potential employers), you shouldn’t let â€Å"well, I just started this other job† discourage you from seriously considering a job opportunity that pays better, or is better aligned with your career goals.Not all advice is true forever. When it comes to your own career, it’s important to think about whether that advice will truly help you, or if it just doesn’t fit with the way the world works anymore.

Research in Motion Company Analysis Assignment Example | Topics and Well Written Essays - 1500 words

Research in Motion Company Analysis - Assignment Example MICRO ANALYSIS a) Demand Factors: The factors that affect the demand for Blackberry greatly vary from country to country since the customer’s preferences and their association with certain brands change based on their perception. According to the study, the share of RIMs worldwide sales of smartphones declined to 14 percent in the period last quarter of 2011 compared to last quarter sales of 20 percent for the same period. On the other hand, Apple’s share remained stable at 16 percent while Android was able to drastically lift its sales almost threefold to about 33 percent. (Miller, 2011) This was mainly due to the fact that the demand for Blackberry devices fell sharply during the last year owing to the success of its competitors. The unprecedented success of Samsung Galaxy S2 coupled by the low prices other Android phones were available in the market; Blackberry’s sales were badly dented. Therefore, the competitors’ factor played a crucial and a signific ant role in determining the demand for Blackberry devices. ... uth shift to smartphone devices, the competition will only toughen and with new and cheap competitors emerging from all parts of the world such as ZTE and Huawei from China, Blackberry will have to rethink its strategy to sell high-end phones to elites since now even the middle class wants to buy such phones. Although, the distinctive feature of Blackberry that resulted in high demands initially namely the BBM service has now been overcome by software’s like Whatsapp and Viber which offer similar services free of charge. Moreover, among the customers who were interviewed to inquire about their preference for buying a new phone in the next 90 days, only 6 percent stated their inclination towards Blackberry devices. Their main comment was that Blackberry has lost its competitive edge both in its shape and appeal. They complained that the bulkiness of the set and the loss of its distinctive feature have contributed to this disliking in the recent past. (Evan, 2010) a) Supply Fact ors: In comparison to this, the supply of Blackberry devices has increased in the past year since the analysts predicted future growth. Factors affecting supply are the demand itself and the price of the device. Other important factors include the technology and raw materials. Materials required for such a device are very unique and expensive, for example, cameras, LCD screen and processors. Therefore, being a company located in Canada, it has generally good access to the most essential raw materials although at times it has to import these materials from other manufacturers who have firm control over these resources in various parts of the world. Blackberry also holds an advantage since RIM is the sole manufacturer of its devices, therefore, they pay special attention to its hardware and the

Libertarian vs Determinism Research Paper Example | Topics and Well Written Essays - 1000 words

Libertarian vs Determinism - Research Paper Example It is moral and normal for people to claim responsibility for their actions. This includes blame and credit for good and terrible actions. According to Wgner (277), this comes from a connection between one’s will and actions where one believes that his will determines the action taken. As a result, it describes determinism. Furthermore, some famous philosophers like Thomas Hobbes and David Hume call this compatibilist freedom or negative freedom as stated by Isaiah Berlin. However, some compatibilists argue that it goes hand in hand with human freedom where people define freedom with freedom of the will. However, this is only true if one is free from external mechanisms such as coercion. Conversely, freedom of action is not similar to freedom of the will. When someone is in confinement, like in jail, some actions are not allowed whereas the will is free. Nevertheless, they are still related since it is the action that is used to relay the will. This, thus, leads to the term â €Å"free will† where an agent has the freedom of action. Logical determinism and causal determinism are also part of soft determinism. The former describes the future and how it has already been determined despite free will. Unlike this, Causal determinism states that every effect has a cause or mechanism. This does not mean that humans are free, nor do they always have free will. They can either have free will and use it how they want, or can have just an appearance of it where they never make choices despite there being preceding mechanisms that favor the result of the decision. In addition to this, physical or social constraints do not define the result of the latter circumstance (Wegner 279). An example is how humans have learnt to fly without using their own bodies. Hence, using the word free in this scenario would be inappropriate. On the other hand, Ayer argues that if human behavior is fully governed by causative mechanisms, then it is not clear how any action done co uld have been avoided (Ayer 272). This can only be different if the cause had been different. As a result, it has lead to controversial opinions on the freedom of will regarding assumptions that an individual is morally responsible for his or her actions. As a result, since the freedom of will is biased, then no one knows what he or she is. In other words, an individual can never act freely if causative factors determine his action. Ayer, thus, disapproves causal determinism. It may also be suitable to classify compatibilism according to those mechanisms that they think are attuned with human freedom. This is because compatibility with God’s foreknowledge or physics, among many other mechanisms, are different. Furthermore, whether in the biological world, the mind, or in the physical world, uncaused random events are true. These events, termed quantum, bring about the probability of novelty, human creativity, and accidents. Generally, it is termed as comprehensive compatibili sm where free will is attuned with both indeterminism and adequate determinism. The latter is restricted to the true determinism in the world while the former describes how certain mechanisms directly influence human behavior and actions. Furthermore, they provide alternative possibilities for the latter determinism to choose the most suitable. According

Academic dishonesty Essay Example for Free

Academic dishonesty Essay The primary objective of Phil 1010 (which fulfills an Area B requirement in the Core) is to help you improve your critical thinking skills. Critical thinking is the skill of recognizing, composing and evaluating arguments. All college courses rely on arguments. Examples include: arguments about business plans, arguments about the qualities of a novel, arguments about the significance of historical events, and arguments about the nature and function of genetic material. Doing well in this course should increase your chances of successfully completing the core curriculum, the courses required by your major, and other courses required to earn your degree. This course is not intended to be an introduction to philosophy and it does not focus on ideas discussed in most philosophy classes (e. g. , justice, knowledge, mind). For an introduction to philosophy, take Phil 2010, Introduction to Philosophy (which fulfills an Area C requirement in the core). Phil 1010 is not a prerequisite for Phil 2010. See more: Old Age Problem essay Prerequisites: There are no other courses required for taking this course; however a significant portion of the course grade involves writing in English, so completion of English composition courses is recommended. REQUIRED MATERIALS: Critical Thinking: The Art of Argument, 2nd custom edition. Rainbolt Dwyer, ISBN 9781133269458 There are used copies of this book available online and in the bookstore. Aplia for Critical Thinking: The Art of Argument PURCHASE ONLINE ONLY at Aplia. com. Other handouts will be sent electronically. IMPORTANT NOTE ON THE VARIOUS EDITIONS OF THE TEXT: There are four different versions of the textbook, but of course you only need one of them. Two are GSU custom editions, and two are national editions. The GSU custom editions are exactly the same as the national editions except that they are printed in black and white and have chapter six removed, since we do not teach chapter six here at GSU. The GSU custom editions were made to save students money and are typically cheaper when purchased new, but the opposite may be the case with used copies, as there are many more used copies of the national edition available for purchase online. As indicated above, I will use the 2nd custom edition, and I recommend that you get this version as well. You may purchase the 1st national edition, however, if you find a copy. Here’s where it gets weird. The 2nd custom edition corresponds to the 1st national edition. If you get either of these texts, you’ll be okay. The 2nd national edition is brand new and has changes in almost every chapter that make it substantially different from the text you need. Do NOT get the 2nd national edition, and do NOT get the 1st custom edition. Specifically, here are the points you need to keep in mind: 1. Critical Thinking: The Art of Argument, 2nd custom edition. (RECOMMENDED, you should purchase this text) Cover picture: the roof of a Greek Temple http://www. amazon. com/Critical-Thinking-Argumet-Edition-University/dp/1133269451 2. Critical Thinking: The Art of Argument, 1st custom edition. (DO NOT PURCHASE) Cover picture: phrenology diagram (four cartoon heads appear on the cover) http://www. amazon. com/Philosophy-Critical-Thinking-Georgia-University/dp/0536864853 3. Critical Thinking: The Art of Argument, 2nd edition (National edition, DO NOT PURCHASE) Cover Picture: a bridge http://www. cengagebrain. com/shop/isbn/9781285197197 4. Critical Thinking: The Art of Argument, 1st edition. (National edition, you may purchase, but NOT recommended) Cover Picture: a bisected nautilus on the cover (a nautilus is a spiral sea shell) http://www. cengagebrain. com/shop/isbn/9780495501572 The links presented above are not purchasing recommendations. I have only provided them so that you can see a picture of books in question. The bookstore is often more expensive than many popular websites. Hunt around for good deals. The authors of this textbook do not receive any money from the sale of the textbook or other course materials to GSU students. GRADE COMPOSITION 1. Components By Weight: Supplemental Instruction Sessions (SIs)10%2 per month minimum, January excluded. Quizzes/Attendance10% Aplia Exercises10% Midterm10% SE 1 10% SE 2 10%Note that later assignments are weighted more to give SE 320%students credit for improvement and to minimize any Final Exam20%penalty for not knowing the material earlier in the term. 2. Grading Scale Assignments in this class are scored on a scale from 1 to 100. Scores transfer to point scale and letter grades as follows: A+4. 398 – 100C+2. 3 77 – 79 A 4. 00 93 – 97C2. 00 73 – 76. A-3. 7 90 – 92C-1. 7 70 – 72 B+3. 3 87 – 89D1. 0060 – 69 B3. 00 83 – 86F0. 000 – 59 B-2. 7 80 – 82 3. To pass the course, students must earn an overall average of 60, get least a 60 on either the midterm or the final, and complete the final, and the SEs. 4. I reserve the right to withdraw any student who, prior to March 4, 2014, misses more than 2 exercises or misses more than 2 quizzes/classes. However, missing more than 2 exercises or 2 quizzes/classes does not guarantee that I will withdraw you. If you want to withdraw, you need to do that yourself via GoSOLAR. 5. If you are not doing as well as you would like in this or any of your other courses, consider making an appointment with the Undergraduate Studies Office, Sparks 224. It offers one-on-one academic coaching, as well as workshops and tutorials on study skills. Important Tip: It is hard to get less than a C in this course if you take all the quizzes, come to all of the class sessions, do all the exercises, take both exams, and complete all three SEs. It is easy to get an F if you miss more than 2 quizzes or class periods, miss more than 2 sets of exercises, miss an exam, or miss an SE. In other words, effort counts. SEs: â€Å"SE† stands for â€Å"Standardize and Evaluate an Argument. † These will be discussed in detail in class. I reserve the right to use any student’s SE for pedagogical purposes. Students’ names and any other identifying marks will be removed to ensure anonymity. Quizzes: Some class meetings will begin with a quiz. The quizzes will begin promptly and last precisely 5 minutes. They will be composed of two multiple-choice questions that cover the reading assigned for that days class. The questions will be easy if you have done the reading. For merely taking the quiz and remaining in class for the full 50 minutes, you will get 50 of a possible 100 points. You will get 75 of 100 if you get one question right, and 100 of 100 if you get both questions right. This is an ideal opportunity to get an A on 10% of your course grade. Exercises Aplia: Exercises are completed electronically via Aplia. You must purchase the software at Aplia. They are due once a week by or before 11:45 pm on Sunday Eastern Time (be careful not to choose Pacific time! ). Note that the computer will close at precisely that time so you need to be sure your exercises are submitted before that time. See the handout on page 6 for accessing Exercises on Aplia. Your grade on each set of exercises is the percentage of the questions you get right. For example, if there are eight questions in an exercise set, and you get six of them right, your grade on that set is a 75. However, your actual Aplia grade will be based on your good faith effort. If you attempt to do all of the questions on the exercises every week, and you average between 60—93%, your total Aplia grade will be set at 93. Scores over 93% will be recorded as they are. This is an ideal opportunity to get an A on 10% of your course grade. Make-Ups: 1. Late assignments and absences are excused only when there is a sufficiently documented, last minute significant emergency. 2. There are no make-ups for daily quizzes. If you have an excused absence on that day, that day’s quiz will simply be dropped from the calculation of your quiz grade. Email: 1. Email is the best way to contact me. 2. You should check your official Georgia State email at least once every 24 hours. 3. By University policy, I must use your official Georgia State student email address. If you send an email from a non-GSU email account, I cannot respond. 4. If you email me from your GSU account and have not received a reply within 24 hours, you should assume that I did not receive the message. Contact me in person. 5. If you turn in any assignment by email, it is your responsibility to confirm that I received it on time. You will know that I got it because I reply to all student emails. If I do not receive it on time, you will not get credit for the assignment without time-stamped email proof that you sent it before it was due. Having trouble with your email, computer, or ISP is not an excuse for a late assignment. Attendance: Everyone’s presence is an intrinsic and vital feature of the class. Even if you do not speak, your presence has an effect on what is said by others. Attendance can be the deciding factor for course grades on the borderline. Class Format: The class will be a combination of lecture, discussion, and practice. This format demands that students be well prepared for class. You do not have to understand all the readings before class, but you need to read all the readings before class and be prepared to ask questions about what you do not understand. Electronic Devices: No computers, cell phones, smart phones, PDAs, pagers, or other electronic devices may be used in the classroom. Please turn off all devices before class begins. Students with Disabilities: If you have a disability that may impair your ability to successfully complete this course, contact your instructor as soon as possible to arrange accommodations. GSU has two programs that provide supports services to students with disabilities. Office of Disability Services http://www2. gsu. edu/~wwwods/ 404. 413-1560 Accessibility At GSU http://www2. gsu. edu/~wwwada/ 404. 464-9044 Students who wish to request accommodation for a disability may do so by registering with the Office of Disability Services (second floor in the Student Center; [emailprotected] edu). Students may be accommodated only upon issuance by the Office of Disability Services of a signed Accommodation Plan and are responsible for providing a copy of that plan to instructors of all classes in which accommodations are sought. ACADEMIC DISHONESTY: Failure of the course is the default departmental penalty for plagiarism, cheating on a test, copying someone else’s work, letting someone else copy your work, or any other form of academic dishonesty. For example, copying someone else’s standardization of an argument is a case of plagiarism and will result in failure of the course. You are encouraged to study for tests with your classmates, but all work turned in for credit must be either your own work, or correctly cited. If you use even a small part of a classmate’s work or a line from an online source, you must use proper citation. If you don’t, you have violated GSU’s academic honesty policy. Finally, note that on assignments in this class, no outside sources are permitted for in-class tests or SEs. Moreover, you are liable for further administrative action, which might include expulsion with notation on your permanent record. See the GSU Policy on Academic Dishonesty attached to this syllabus, available in the University Student Handbook, and found online at http://www2. gsu. edu/~wwwcam/overview/index. html In addition, be sure you give due consideration to what it means to be a good friend! Not infrequently, students draw the natural but erroneous conclusion that allowing or facilitating a friend’s cheating is somehow helping that friend. FAR FROM IT! Good friends, truly good friends, help us to avoid cheating and any other kind of dishonesty. HOW TO DO WELL IN THIS COURSE: Come to Class and Come on Time: Because of the way grades are computed, and the fact that so much of the course is discussion based, your grade will suffer if you are not present for discussions, and your grade will be favorably affected if you are present. Study Outside of Class: 1. A normal expectation is that undergraduate students will spend a minimum of two hours studying outside of class for every hour spent in class. 2. Since this course meets for 2 hours of class time each week, you should plan on spending at least 4 hours outside of class each week studying the material. It is also likely that it will take more than that amount of time to complete the readings in a manner sufficient to understand the material. Remember in Summer session, every day is equivalent to one week in a Fall or Spring term! Read the Assignments Multiple Times: Philosophy is demanding reading. I expect you to do all the readings before class and after class. We will not read a great many pages, but some of the readings might be dense or difficult to follow. First, read the work through quickly to get the general idea and to circle any words you don’t understand. Then look up all the words you don’t know and read the work again slowly. Third, after we cover the reading in class, read it again, slowly. Read. Rinse. Repeat. Final Notes: The course syllabus provides a general plan for the course; deviations may be necessary. Everything in this syllabus can change (and something always does). You are responsible for all changes announced in class, on PAWS, and via email. Your constructive assessment of this course plays an indispensable role in shaping education at Georgia State. Upon completing the course, please take time to fill out the online course evaluation. How to access your Aplia course PHIL 1010- Critical Thinking Spring 2014 Instructor: George Rainbolt Start Date: 01/13/2014End Date: 05/11/2014 Course Key: 5N6Q-MHZW-NQNX Registration Aplia is part of CengageBrain, which allows you to sign in to a single site to access your Cengage materials and courses. 1. Connect to http://login. cengagebrain. com/ 2. If you already have an account, sign in. From your Dashboard, enter your course key (5N6Q-MHZW-NQNX) in the box provided, and click the Register button. If you dont have an account, click the Create a New Account button, and enter your course key when prompted: 5N6Q-MHZW-NQNX. Continue to follow the on-screen instructions. Payment Online Only: http://www. cengagebrain. com/micro/gsuphil1010 After registering, you can buy access to Aplia from myhome. cengagebrain. com. Aplia is NOT available from bookstore. Purchase it online only to get special discount price. If you choose to pay later, you can use Aplia without paying until 11:59 PM on 02/02/2014. After paying, you will have the option to purchase a physical book at a discounted price. For more information on registering for Aplia, please visit http://www. cengagebrain. com/aplia/. Phil 1010TENTATIVE Schedule of AssignmentsSpring 2014. January T 1/14Chap 1, What is Critical Thinking, What is an Argument, Why Think Critically, pp. 4-13 R 1/16Chap 1, Finding Arguments, pp. 13-26; Begin Putting in Standard Form Right Away. F 1/17No class, but last day to Add/Drop S 1/19APLIA DUE: How to Use Aplia Due before 11:45pm T 1/21Chap 1, Putting Arguments into Standard Form, pp. 31-36 R 1/23Chap 1, Standardization Practice S 1/26APLIA DUE Ch 1, Sets 1 and 2, before 11:45pm T 1/28SE1 (standardize a passage in class) R 1/30Chap 2, Two Characteristics of a Good Argument, True Premises, and Proper Form, pp. 42-48 and 51-53 February. S 2/2APLIA DUE Ch 1, Set 3, and Ch 2, Set 1, before 11:45pm T 2/4Chap 2, Deductive and Inductive Arguments and Relevance, Fallacies pp. 55-64 and 70-79 R 2/6Chap 3, Three Kinds of Premises, pp. 86-102 S 2/9APLIA DUE Ch 2, Set 22, before 11:45pm T 2/11SE 2 (standardizing and evaluating a passage in class) R 2/13Chap 5, Identifying Propositional Statements, pp. 146-156 S 2/16APLIA DUE Ch 2, Set 3, before 11:45pm T 2/18Chap 5, Evaluating Propositional Arguments, pp. 159-169 R 2/20Chap 5, How PF test differs for Deductive and Inductive Arguments S 2/23APLIA DUE Ch 3, Set 1, before 11:45pm T 2/25Review. R 2/27Midterm in class March S 3/2APLIA DUE Ch 5, Set 1, before 11:45pm T 3/4Chap 7, Identifying Analogical Arguments, pp. 228-234 Last day to withdraw with a W R 3/6Chap 7, Evaluating Analogical Arguments, pp. 244-256 S 3/9APLIA DUE Ch 5, Set 2, and Ch 7, Set 1, before 11:45pm T 3/11Chap 8, Descriptive Statistics, pp. 258-275 R 3/13Chap 8 Identifying Statistical Arguments, pp. 275-278 S 3/16APLIA DUE Ch 7, Set 2, and Ch 8, Set 1, before 11:45pm T3/18 R 3/20NO CLASS SPRING BREAK T 3/25Chap 8, Evaluating Statistical Arguments, pp. 281-285 R 3/27Chap 8, Evaluating Statistical Arguments continued. S 3/30APLIA DUE Ch 8, Sets 2 and 3, before 11:45pm April T 4/1No Fooling! 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Abandoned Oil Wells End of Field Life

Abandoned Oil Wells End of Field Life ABSTRACT As petroleum, production continues to decline in many parts of the globe, more operators are seeing well abandonment as a reality. Drilled wells are plugged and abandoned for different reasons of which the typical and operational reason is that the well has reached its economic limit or when drilled it was found to be a dry hole. (refer). According to Ide, T., et al 2006, well bore is taken to be high fluid transmittal pathway. Even with the current procedure of sealing and abandonment, individual wells have the tendency to loose their integrity due to various factors, which include but not limited to poor cementation, poor or ineffective plugging, and increase in formation pressure after abandonment, corrosion of casing (refer). Safe and economical well abandonment are important to the industry from environmental and financial standpoints. Improper abandonment can require re-abandonment procedures to mitigate environmental contamination or to comply with updated regulations, causing an increased financial burden on the operator. 1. Introduction 1.1 BACKGROUND All wells drilled have a distinct life cycle with respect to its cost, duration, recovery, and value. Although these characteristics and attributes are specific to an individual drilled well, all producing wells pass through the same initial and final state, beginning with completion and ending with abandonment. After the drilling stage of a well and the target depth is reached, a decision to complete the well is made based on the reservoir attributes: is the well dry or is the hydrocarbon in place of economic value. Ultimately, every well becomes dormant because of reduced economic returns or technical problem. When a well stops producing, it either may be shut-in (SI), temporary abandoned (TA) or permanently abandoned (pa). With ageing fields fast approaching their economic limit, abandonment is becoming increasingly frequent and many operators have to modify their abandonment procedure to fit the Wellbore condition and make certain that abandoned wells remain permanently sealed and prevent commingling while balancing the environmental objectives of abandonment and cost of actual abandonment. Wells, which are not abandoned appropriately, can become a major hazard to the underground source of drinking water and possibly the aquatic environment [8] Shut in status (SI) When a well is shut-in it is still flowing but its Christmas tree, SV, wing valves are all closed. Usually a well is shut-in if there is a technical or operational problem, which is believed to be temporary. There is no maximum time for a well to remain in shut-in status as long as it is regularly maintained according to regulatory requirement and procedures. Temporary abandonment status (TA) A well is said to be temporarily abandoned when the wellhead is removed and the producing interval is isolated with a plug and the casing is plugged below the mud line. REASONS FOR ABANDONMENT There are various reasons why a well is abandoned, these are: END OF FIELD LIFE ABANDONMENT Drilled wells must at one point in time be abandoned. Before a well reaches the point at which it has to be abandoned it passes through various stages in its life cycle; it begins with the survey and exploitation of an area for signs on hydrocarbon [1]. This leads to a rewarding and exciting discovery of an accumulation of hydrocarbon deposit. This is followed by the acquired Data Processing stage and finally the drilling process. During drilling, the well is created by the use of drill bit and cased off at specific as drilling progresses. Another fulfilling target is reached when the first hydrocarbon is produced a process which unfortunately eventually proceeds the declining period where the rate of hydrocarbon production decreases. However, successful enhanced oil recovery techniques often than not make this stage rewarding financially as it extends the life of the well [1]. When all enhanced oil recovery technique has been employed, and the cost of producing the well is no longer economically viable, the next process is abandonment; a stage not so welcomed by most operators as it means the cessation of production. Dry hole Abandonment A drilled well is also abandoned when after drilling, the hole was found to be a dry hole. Though abandonment is meant to be a permanent termination, the effect is felt for many years more than that of the short producing life of the well. The main goal of any plugging and abandonment is to provide a permanent and effective isolation of fluids all along the subsurface formation in the different layers where they were enclosed prior to plugging, thereby preventing fluid migration and reduce environmental risks of contamination and prevent costly remedial jobs [1]. To achieve this several significant intervals of the well must be filled and tightly closed with a sealant material from bottom hole to the surface with special attention paid to the production interval [4] and zones of high differential pressure and temperature. The material used for plugging differ depending on what type of well is being abandoned, for oil and gas well the material used is normally cement based materials, for water well, cement based as well as bentonite can be used to isolate the different intervals[4][ PUT UNDER CEMENT PLUG CHARACTERISTICS UNDERE INTEGRITY OF ABANDONED WELLS. The integrity of the abandoned well can fail for very many reaso ns such as plug failure, poor slurry design etc. A cement plug can fail to set at the desired location as cement slurry often has the tendency to fall through the lighter drilling fluid below it [9]. Failure can also be as a result of downhole changes which may occur after the well has been abandoned [8]. Over the years, techniques for drilling and completion of hydrocarbon wells have continued to evolve. This drive for new technology for hydrocarbon recovery is due to the need to maximize hydrocarbon recovery while protecting the environment [4]. The evolution of well abandonment techniques has been much slower than that of drilling and completion. This is because abandonment is considered a sunk cost [4]. Project Objective The objectives of this thesis is to review the factors which contribute to the overall integrity of abandoned wells. These include, well parameters, cement placement techniques, casing integrity. These play an important role in the design, construction and actual execution of the abandonment project. In the abandonment of wells, the factors that contribute to the integrity differ depending on the wells. This is because each well is a unique entity and hence has to have independent well abandonment design. PROJECT METHODOLOGY In this work I intend to talk about For instance, in a well where a fish is lost in hole the abandonment design has to taken into consideration remedial action or ways to set the cement plug as there may be no access to the bottom hole to set a bottom plug in the sump. Abandoned wells can be a cause of concern due to their potential to act as path for flow between formations, which under normal circumstance are isolated including underground sources of drinking water, of great concern are those abandonments with faulty plugs, compromised casing and those having cracks in the cement [7]. This work is aimed at highlighting the different factors which contribute to the integrity of an abandoned well. ( reorder and rewrite) Chapter 2 Literature review Well abandonment has come a long way since the first discovery of oil and gas, with the increasing awareness of the importance of environmental protection, the need to improve the processes of abandonment has now become a major concern for many operators, as abandoned wells are considered a possible conduit for fluid flow between different formations. According to C. H. Kelm et al, the objective of abandonment of a well must taken into consideration the need to do so in a best practices manner by examining the following fundamental aim of any abandonment process; The need to protect any hydrocarbon left in the pay zone of the formation drilled. The need to preserve and prevent contamination of freshwater zones (for onshore rigs) penetrated during the course of drilling the well. Avert of any contamination of the surface environment. For instance, in the case of vegetation, air pollution and marine environment. The need to abide by all regulatory requirements stated in during the abandonment. In the past years many papers has been published on areas ranging from alternative plugging technique, self healing and expandable cement, improved cement slurry design, placement technique with the aim to reduce the cost of abandonment and improve the abandonment. Abandoned well in an oil field are sealed using a plugging material according to regulatory requirements. A perfect example of a plugging material in the ideal sense according to D.G Calvert et al 1994 is one, which can be pumped down the drilled hole, has the ability to harden in a reasonable time, and bond with the walls of the drilled formation and casing in order to prevent fluid flow from one formation to another. While regulations vary from place to place, the general practice involves plugging the Wellbore with a Portland cement material specifically designed for the isolation purpose. In his review of plugging and abandonment techniques, D. G. Calvert et al, stated that the cement mixture used in oil and gas vary d epending on the type of hole is to be isolated. Very few papers has been published that focuses on the integrity of the actual well after abandonment. Liversidge, D. et al. in his work on permanent plug and abandonment solution for the Northsea he presented case histories of the Brent South field abandonment project done using both class G cement with an expandable agent system and flexible cement according to the current stringent regulation. Cement integrity preservation during well completion, production phases as well as during abandonment is of critical importance for long-term protection. In the past years numerous papers and texts in the area of cement sheath failure, improved flexible and expanding cement and related topics have been published, indicating the increasing need to improve well abandonment and reduce cost. Examples of works published include but not limited to (Bosma et al 2000), (Ravi et al. 2002), (Glessner et al., 2005), (Mainguy et al., 2007), (D. G calvert et al., 1994), (Locolier et al., 2006),( Liversidge et al., 2006). Although many papers have been written, very little work has been done to investigate the cement plug integrity after abandonment. The ascribed cause to this may be that permanent abandonment is considered a non-profit venture. Mainguy M. et al., 2007 carried out an analysis of the probability of failure of cement plugs when subjected to varying compressive and tensile load using an ideal reservoir model designed to suit changes in the downhole condition. In his study he identified that there is a greater tendency for the material used to seal zones for abandonment to fail in wells situated where there is instability in the pressure, temperature and stress state due to changes that occur downhole. He concluded that when the plug is subjected to maximum tensile stress it failed due to the low tensile strength of the conventional class G cement. Though he suggested the use of pre-stressed cement as they adapt more to changes downhole, his work did not cover the problem of rock-cement de-bonding which is a problem that greatly reduces the sealing capacity of cement. In the study done by R.C. Smith et al., 1984, on the successful method of setting cement plug, he investigated the ongoing failures of cement plug s due to the instability caused by the difference between the density of the cement and the drilling mud. In his work, he suggested the use of mud thickened with bentonite before spotting the cement so as to allow a greater density difference. With respect to the problem of controlling the direction of flow of the cement slurry a diverter placed at the end of the tubing to help divert the direction of flow and improve stability. Drilling fluid can also be used as a plugging material by adding a cementitous additive. The additive can either be fly ash of blast furnace slag which have the characteristics of a cement as they harden when the mixed with water. Cement is not naturally occurring but manmade and like any other manmade material, it is expected to age, wear-off, and, degrade overtime under different subsurface condition, which may differ from the time it was initially set [W. Zhou et. al 2005]. Plugging oil well is a common operation, which is increasing as mature field reach the end of their producing life. In general, plugging and abandonment of a well involves filling a certain length of casing or open hole with a volume of cement mixture designed for it in order to provide adequate sealing against upward migration of formation fluid. After the cement plug is place in the desired location it is left to harden over time. The placement of the cement plug is a major part of abandonment, as failure of this will cause commingling of fluids from different formation. The setting and spotting of cement plugs can be done in various ways depending on the wellbore condition and regulatory requirement. A review of the worldwide acceptable plugging procedure shows the a minimum of three cement plugs is required of which two are, the first plug is put in place by squeezing the cement plug through the perforation into the former producing zone in order to seal off any further influx of reservoir fluid into the Wellbore[2]. The second plug is usually set towards the middle of the Wellbore or near a protective casing shoe. Finally the third plug is set about200- 300ft below the mud line. In general, the length of a plug ranges from 100to 200ft depending on the regulatory requirements. Any additional plug set is dependent on the well bore condition. Although observations and studies show that cement plugs have the ability to perform as expected for up to several decades, uncertainty exists that the material can maintain its isolation integrity for several thousands of years. Recent study shows that abandoned wells in which CO2 was used in the enhanced oil recovery technique prior to abandonment have the potential to leak and allow CO2 migration notwithstanding the fact that the well has been properly abandoned [Scherer, G.W et al, 2005]. This is mainly due to corrosion and degradation of the casing and cement. This degradation and corrosion occurs when carbonic acid formed from the dissolution of CO2 in brine attacks the cement and casing [Scherer, G.W et al, 2005] a process, which is dependent on the temperature of the formation, cement composition, brine and the rock mechanics and composition. Potential leakage of reservoir fluids through degraded cement plugs is hence of primary concern. Various work on inter-formational flow shows that there is still the possibility of flow between formations even with a successful plugging of different interval. This case can arise when the abandoned well is near an active well. Javandel et al developed the first analytical model; their model showed the possible of flow to an upper formation in response to a lower injection pressure build up in a lower formation. Striz and wiggings carried out further work by developing a coupled model to predict flow using a steady state approach to create a transient flow. This model can be used to developed abandoned fluid flow using available field data. In recent studies, statistics show that in the US one in every three well drilled for hydrocarbon is dry and have to be plugged and abandoned[D.G Calvert, et al 1994]. Wells are drilled for various reasons ranging from industrial, oil and gas, to municipal uses, but in the end these well have to be abandoned [D.G Calvert, et al 1994]. Some wells were abandoned before any regulation and guidelines were defined, these wells may have either been plugged improperly or not plugged at all and these now poses a threat to the quality of the groundwater. For the aim of regulating bodies to be achieved i.e. achieving underground water protect and hence environmental protect, the operating companies must understand that following the different regulatory requirement alone is not sufficient to guarantee a lasting protection of the environment [4]. It is sometimes difficult for operators to abide by the regulatory requirements as well as developing a plan which would both serve to seal off the reservoir and provide long-term protection of the environment while justifying the overall cost in general [4]. Currently there is a high rise in abandonment of ageing and mature field which either have reached their economic limit or are no longer producing (refer). Methods of ABANDONMENT The initial stage of a decommissioning process is the plugging and abandonment of the wells, during this stage, the tubing, casing strings, and, conductors are cut below the mud line and removed, zones are sealed with cement plug to isolate the flow path between the reservoir fluids and other zones as well as the surface. Zones not sealed with cement plug are filled with mud with fluid having the proper weight and consistency to prevent movement of other fluids into the wellbore. Most abandonments follow a general methodology that is adjusted to meet individual well requirements. As procedures can and do change significantly for each well, cement plug design should frequently be attuned to reach minimum wait-on-cement (WOC) times with varying downhole conditions. Near-wellbore geology should be assessed, and the wellbore and annuli properly cleaned to avoid microannuli and poor cement bonding. Traditional techniques include cement squeezes, gel squeezes, and mechanical plugs such as bridge plugs and packers. Cement and gel technologies are mainly used for behind casing repair, and mechanical options are usually confined to plugging the casing. In the general process of abandonment there as basic steps which are followed to ensure successful plug and abandonment program. This includes the planning process, wellbore equipment testing, designing, well geometry assessment. PA PLANNING The most essential decision after when to abandon a well [11] is how. Preparation is a key ingredient in plug and abandonment of a well. In order to abandon a well successfully careful planning and effective plugging and abandonment procedure is crucial to prevent gas or fluids from moving to the surface or to other subsurface formations. In addition to the environmental risks that come with poor seals, corrective plugging may be necessary, increasing the cost and difficulty of abandoning a well. However, operators and service companies have several options for obtaining complete, permanent abandonment. For every well, there is a variation as each well PA is unique and different. The techniques used to achieve this process are generally based on industry practice, research, and conformance with the relevant regulatory compliance requirement. The synthesis of practical knowledge, current technology and regulatory requirements results in the most effective wellbore plugging and abandonment possible. Wellbore equipment testing. A preliminary inspection and survey of the wellhead and wellbore condition is carried out to determine if the valves on the wellhead are in operable condition, if it is found not to be in operable condition they are hot-tapped. The wellbore is surveyed using a slickline unit to check for any obstructions in the well, to confirm measured depth and also to gauge the internal diameter of the tubing. After the survey and removal of the slickline, the annuli and tubing is filled with fluid using a well pump is installed at the wellhead to ascertain an injection rate into the perforations. The tubing and casing are also pressured up to check for integrity. Casing annuli are also pressure tested to check for communication problems between casing strings and to record the test pressure over a period of time. The integrity and reliability of the primary cement is assessed in order to ensure that the cement sheath is still providing isolation across the reservoir and the cap rock. A well control plan is designed to establish reservoir condition and subsequently the contingency responses to any event which may occur during the abandonment process. DESIGN OF A WELL ABANDONMENT PROGRAM Prior to plugging and abandoning a well, a review of the existing well design, record of past work, previous well performance and geologic and reservoir condition is carried out by the operator. The investigation of everything that may relate to the health and safety issues as well as regulatory requirements is also performed, after which the design of the abandonment program begins. The design is done based the existing wellbore and reservoir conditions depending on the findings from the review and investigation. This allows the operator to plan an abandonment program that will satisfy the goal of making the well safe from future resources. PA design needs to be integrated in the planning of the well, and should be considered in a single budget. There are many factors which must be put into consideration in order to design an effective abandonment program , such as, the reservoir status, the integrity of the primary cement, hole cleaning and cement placement technique, the temperatu re and pressure of the well, the type of fluid in the well, the age of the well, the status of the cap rock. Fluid Type Drilled wells produce fluids in liquid and gaseous form, wells which contain sour fluids i.e. sulphur rich would be expected to have accelerated corrosion rates and stress cracking depending on the age and wellbore construction, may impair the capacity to perform plug and abandonment, to mitigate this components which are corrosion resistant can be used. Reservoir status In the design of PA, it is necessary to consider the reservoir status concerning its stability, the current pressure and temperature, the pressure at the initial stages of well development and the permeability of the reservoir both horizontal and vertical. With the information, plug and abandonment is then designed to withstand the pressure of the well after finally reach equilibrium. Cap rock Status It is also necessary to take into consideration the cap rock status i.e. is it still impermeable, has production activities induced fracture or has weathering taken effect. Placing the Plugs After the design and planning of the abandonment program, calculations must be made to determine the amount of cement required and the number of wiper plugs needed to separate the cement plugs from the rest of the fluids. The use of wiper plugs enables the formation of a stable platform on which the cement can be set. A wiper plug is placed in the wellbore, and then a predetermined quantity of cement slurry is pumped on top of it. Because of its weight, the slurry becomes a driving force. The slurry falls to the bottom of the hole, pushing the wiper plug ahead of it and forcing existing air and produced fluids back into the formation. Another plug and perhaps a bit more cement finish the job. In most wells, where there is one permaeble zone, one plug and one volume of cement and the surface plug are all that is needed. In other wells, additional wiper plugs, additional cement slurry, and probably spacers of water or drilling fluid are used consecutively until all of the air and fluid is forced out into the formation, there is zilch pressure on the pipe, and it is apparent from the returns that the whole wellbore is appropriately sealed. The quantity and kind of spacer fluid that can be used is dependent on individual state regulations. The remaining casing at the top of the well is cut off 3 ft below ground level. Along with this general methodology, each region stipulates its own abandonment methods based on field conditions and local regulations as can be seen in the following examples. PA steps in Los Angeles Basin in as follows [12]: The abandonment program is prepared with the support of a qualified engineer. A schematic showing the current mechanical condition of the well is prepared. The geologic condition of the well, including the structure, faulting, and producing zones is assessed. The depth and position of cement plug that will cover the producing zones and any potable water zones if applicable is measured and verified. Choice of whether to use perforating or cavity shots is made. The casing is pressure tested after setting cement retainers. The different equipment required for the job is determined and assembled. Estimate of abandonment/re-abandonment costs is made. In contrast, the steps followed for the Hutton tension-leg platform (TLP) in the East Shetland Basin of the North Sea involved three phases [13]: Perform standalone wireline intervention. Perform drilling unit intervention to set the cement plugs after the first wireline plug has been set. Cut casing 10 ft below the seabed and recover casing stumps. Another abandonment performed in the North Sea followed a different procedure [14]: A permanent cement primary barrier placed immediately above the reservoir. A secondary barrier placed as a back-up to the first barrier. A third barrier then placed near the surface to isolate shallow water-bearing sands. Severed completion tubing and recover wellhead. In Western Canada, the traditional abandonment procedure of wells with casing vent flows included the following: The source of the casing vent flow is estimated or determined. If the source zone is shallower than the producing zone, the producing zone is abandoned. The source zone is perforated. Depending on the feed rate obtained at the estimated source depth, either a bradenhead or a retainer squeeze is performed. Retrievable tools are used as required. Typically, Class G cement with Calcium Chloride and some fluid-loss control is utilized. The slurry is placed and a static squeeze pressure of 7 MPa is attempted. As needed, cement is drilled out and perforations are tested for seal. Often, several attempts are made in order to obtain a static squeeze pressure of 7 Mpa on surface or mitigate the casing vent flow. Techniques for Abandonment The techniques used for plugging and abandonment of drilled well worldwide are generally based on industry practise. These techniques include; Rig Coil tubing unit Rigless abandonment COIL TUBING UNIT The flexibility of coiled tubing has recently been tailored to develop rigless abandonment [15,16]. This method, focuses on harmonizing all well services to accomplish utmost efficiency. Coiled-tubing unit [fig.] abandonment, like any other method, is more effective when appropriate cementing procedure is used from the kick-off of the well, from original zonal isolation with the primary cement sheath to plugging and abandonment. Early prevention of microannulus can help operators obtain a complete final seal. Five main criteria are recommended for optimal abandonment performance with coiled tubing: Mobility; All equipment should be mounted on wheels for increased mobility. Self-sufficiency; the service company provides nearly all activities. Dry location; Fluids are not drained on or near the wellsite. Single operation; the job is completed in one visit to the wellsite. Low mileage; Move time is reduced and transport optimized for maximum efficiency in unit and camp moves. In this abandonment technique geological consideration like the type and condition of the reservoir and caprock formations are take into account. Permanent seals typically must be made between producing zones and at impermeable caprock formations. The condition and configuration of cement, perforations, tubulars, and downhole equipment are also considered. In addition to providing complete, permanent seals, the use of coiled-tubing can help increase abandonment efficiency. This method can provide the following advantages: Increased tripping speeds Increased rig-move efficiency Precise placement of cement plugs; exact spotting of plugs at the interval of interest even in deep well as coil tubing can be reciprocated while pumping. Suitable for use on live wells; it is possible to run CTU for remedial cement squeeze in live well as the wellbore can be controlled using the BOP and stripper assembly. No need to pull production tubing; existing tubing and wellheads do not have to be removed to access the producing interval. Success using the coil tubing method has been recorded in Oman. REGULATORY REQUIREMENT FOR ABANDONMENT IN THE NORTHSEA AND USA In the early years on the oil and gas industry, many wells were drilled and some were found to be dry and subsequently were abandoned without much consideration given to the manner in which the wells were abandoned. Sometimes tree stumps were thrown in the well as a means to plug it [3], during this era the preservation of the groundwater, in general, the environment was not a major issue, and there was no defined regulation by the oil states or agencies. During the tail end of the 1930s different states and agencies in the US started establishing regulations, this defined requirement to ensure better well abandonment [D.G Calvert, et al 1994]. The number of regulation guiding well abandonment has risen along with the rising need to protect the environment in countries around the world. Today most countries have some form of regulation that addresses well abandonment requirement; though these regulations are not uniform and differ from country to country and body to body, they provide a minimum standard for operating companies. For instance for the state of California in the United States of America, the different governing bodies have their own regulations which are as follows; Minerals Management Services (MMS): The basic plugging requirements are found in 30 CFR 250.110 Subpart G. Department of Conservation, Division of Oil: Gas, and Geothermal Resources (DOC) The California Code of Regulations Title 14 Division 2, Chapter 4 beginning with Section 1745 focuses on the fundamental plugging requirements. California State Lands Commission (CSLC): The fundamental plugging requirements in the California Code of Regulations Title 2 Section 2128(q). Abandonment in the North Sea In the North Sea as in US, the regulations differ. The different countries that make up the North Sea have their different governing bodies and subsequently different regulation. The law in the UK, Norway, Denmark and Holland holds the last operator of a well accountable and responsible to pay for all the cost incurred in permanently abandoning the well. It also holds them accountable for any leakage and any clean up that may be required in the event of a leak. Abandonment programs in the Northsea are designed to meet the guidelines for abandonment issued by the operation association or government. For the UK sector of the north sea, abandonment guidelines is issued by the UKOOA, similarly for the Norwegian sector the guidelines are contained in the NORSOK/PTIL D-010 standard and for the Netherlands it is contained in the Dutch Mining Abandoned Oil Wells End of Field Life Abandoned Oil Wells End of Field Life ABSTRACT As petroleum, production continues to decline in many parts of the globe, more operators are seeing well abandonment as a reality. Drilled wells are plugged and abandoned for different reasons of which the typical and operational reason is that the well has reached its economic limit or when drilled it was found to be a dry hole. (refer). According to Ide, T., et al 2006, well bore is taken to be high fluid transmittal pathway. Even with the current procedure of sealing and abandonment, individual wells have the tendency to loose their integrity due to various factors, which include but not limited to poor cementation, poor or ineffective plugging, and increase in formation pressure after abandonment, corrosion of casing (refer). Safe and economical well abandonment are important to the industry from environmental and financial standpoints. Improper abandonment can require re-abandonment procedures to mitigate environmental contamination or to comply with updated regulations, causing an increased financial burden on the operator. 1. Introduction 1.1 BACKGROUND All wells drilled have a distinct life cycle with respect to its cost, duration, recovery, and value. Although these characteristics and attributes are specific to an individual drilled well, all producing wells pass through the same initial and final state, beginning with completion and ending with abandonment. After the drilling stage of a well and the target depth is reached, a decision to complete the well is made based on the reservoir attributes: is the well dry or is the hydrocarbon in place of economic value. Ultimately, every well becomes dormant because of reduced economic returns or technical problem. When a well stops producing, it either may be shut-in (SI), temporary abandoned (TA) or permanently abandoned (pa). With ageing fields fast approaching their economic limit, abandonment is becoming increasingly frequent and many operators have to modify their abandonment procedure to fit the Wellbore condition and make certain that abandoned wells remain permanently sealed and prevent commingling while balancing the environmental objectives of abandonment and cost of actual abandonment. Wells, which are not abandoned appropriately, can become a major hazard to the underground source of drinking water and possibly the aquatic environment [8] Shut in status (SI) When a well is shut-in it is still flowing but its Christmas tree, SV, wing valves are all closed. Usually a well is shut-in if there is a technical or operational problem, which is believed to be temporary. There is no maximum time for a well to remain in shut-in status as long as it is regularly maintained according to regulatory requirement and procedures. Temporary abandonment status (TA) A well is said to be temporarily abandoned when the wellhead is removed and the producing interval is isolated with a plug and the casing is plugged below the mud line. REASONS FOR ABANDONMENT There are various reasons why a well is abandoned, these are: END OF FIELD LIFE ABANDONMENT Drilled wells must at one point in time be abandoned. Before a well reaches the point at which it has to be abandoned it passes through various stages in its life cycle; it begins with the survey and exploitation of an area for signs on hydrocarbon [1]. This leads to a rewarding and exciting discovery of an accumulation of hydrocarbon deposit. This is followed by the acquired Data Processing stage and finally the drilling process. During drilling, the well is created by the use of drill bit and cased off at specific as drilling progresses. Another fulfilling target is reached when the first hydrocarbon is produced a process which unfortunately eventually proceeds the declining period where the rate of hydrocarbon production decreases. However, successful enhanced oil recovery techniques often than not make this stage rewarding financially as it extends the life of the well [1]. When all enhanced oil recovery technique has been employed, and the cost of producing the well is no longer economically viable, the next process is abandonment; a stage not so welcomed by most operators as it means the cessation of production. Dry hole Abandonment A drilled well is also abandoned when after drilling, the hole was found to be a dry hole. Though abandonment is meant to be a permanent termination, the effect is felt for many years more than that of the short producing life of the well. The main goal of any plugging and abandonment is to provide a permanent and effective isolation of fluids all along the subsurface formation in the different layers where they were enclosed prior to plugging, thereby preventing fluid migration and reduce environmental risks of contamination and prevent costly remedial jobs [1]. To achieve this several significant intervals of the well must be filled and tightly closed with a sealant material from bottom hole to the surface with special attention paid to the production interval [4] and zones of high differential pressure and temperature. The material used for plugging differ depending on what type of well is being abandoned, for oil and gas well the material used is normally cement based materials, for water well, cement based as well as bentonite can be used to isolate the different intervals[4][ PUT UNDER CEMENT PLUG CHARACTERISTICS UNDERE INTEGRITY OF ABANDONED WELLS. The integrity of the abandoned well can fail for very many reaso ns such as plug failure, poor slurry design etc. A cement plug can fail to set at the desired location as cement slurry often has the tendency to fall through the lighter drilling fluid below it [9]. Failure can also be as a result of downhole changes which may occur after the well has been abandoned [8]. Over the years, techniques for drilling and completion of hydrocarbon wells have continued to evolve. This drive for new technology for hydrocarbon recovery is due to the need to maximize hydrocarbon recovery while protecting the environment [4]. The evolution of well abandonment techniques has been much slower than that of drilling and completion. This is because abandonment is considered a sunk cost [4]. Project Objective The objectives of this thesis is to review the factors which contribute to the overall integrity of abandoned wells. These include, well parameters, cement placement techniques, casing integrity. These play an important role in the design, construction and actual execution of the abandonment project. In the abandonment of wells, the factors that contribute to the integrity differ depending on the wells. This is because each well is a unique entity and hence has to have independent well abandonment design. PROJECT METHODOLOGY In this work I intend to talk about For instance, in a well where a fish is lost in hole the abandonment design has to taken into consideration remedial action or ways to set the cement plug as there may be no access to the bottom hole to set a bottom plug in the sump. Abandoned wells can be a cause of concern due to their potential to act as path for flow between formations, which under normal circumstance are isolated including underground sources of drinking water, of great concern are those abandonments with faulty plugs, compromised casing and those having cracks in the cement [7]. This work is aimed at highlighting the different factors which contribute to the integrity of an abandoned well. ( reorder and rewrite) Chapter 2 Literature review Well abandonment has come a long way since the first discovery of oil and gas, with the increasing awareness of the importance of environmental protection, the need to improve the processes of abandonment has now become a major concern for many operators, as abandoned wells are considered a possible conduit for fluid flow between different formations. According to C. H. Kelm et al, the objective of abandonment of a well must taken into consideration the need to do so in a best practices manner by examining the following fundamental aim of any abandonment process; The need to protect any hydrocarbon left in the pay zone of the formation drilled. The need to preserve and prevent contamination of freshwater zones (for onshore rigs) penetrated during the course of drilling the well. Avert of any contamination of the surface environment. For instance, in the case of vegetation, air pollution and marine environment. The need to abide by all regulatory requirements stated in during the abandonment. In the past years many papers has been published on areas ranging from alternative plugging technique, self healing and expandable cement, improved cement slurry design, placement technique with the aim to reduce the cost of abandonment and improve the abandonment. Abandoned well in an oil field are sealed using a plugging material according to regulatory requirements. A perfect example of a plugging material in the ideal sense according to D.G Calvert et al 1994 is one, which can be pumped down the drilled hole, has the ability to harden in a reasonable time, and bond with the walls of the drilled formation and casing in order to prevent fluid flow from one formation to another. While regulations vary from place to place, the general practice involves plugging the Wellbore with a Portland cement material specifically designed for the isolation purpose. In his review of plugging and abandonment techniques, D. G. Calvert et al, stated that the cement mixture used in oil and gas vary d epending on the type of hole is to be isolated. Very few papers has been published that focuses on the integrity of the actual well after abandonment. Liversidge, D. et al. in his work on permanent plug and abandonment solution for the Northsea he presented case histories of the Brent South field abandonment project done using both class G cement with an expandable agent system and flexible cement according to the current stringent regulation. Cement integrity preservation during well completion, production phases as well as during abandonment is of critical importance for long-term protection. In the past years numerous papers and texts in the area of cement sheath failure, improved flexible and expanding cement and related topics have been published, indicating the increasing need to improve well abandonment and reduce cost. Examples of works published include but not limited to (Bosma et al 2000), (Ravi et al. 2002), (Glessner et al., 2005), (Mainguy et al., 2007), (D. G calvert et al., 1994), (Locolier et al., 2006),( Liversidge et al., 2006). Although many papers have been written, very little work has been done to investigate the cement plug integrity after abandonment. The ascribed cause to this may be that permanent abandonment is considered a non-profit venture. Mainguy M. et al., 2007 carried out an analysis of the probability of failure of cement plugs when subjected to varying compressive and tensile load using an ideal reservoir model designed to suit changes in the downhole condition. In his study he identified that there is a greater tendency for the material used to seal zones for abandonment to fail in wells situated where there is instability in the pressure, temperature and stress state due to changes that occur downhole. He concluded that when the plug is subjected to maximum tensile stress it failed due to the low tensile strength of the conventional class G cement. Though he suggested the use of pre-stressed cement as they adapt more to changes downhole, his work did not cover the problem of rock-cement de-bonding which is a problem that greatly reduces the sealing capacity of cement. In the study done by R.C. Smith et al., 1984, on the successful method of setting cement plug, he investigated the ongoing failures of cement plug s due to the instability caused by the difference between the density of the cement and the drilling mud. In his work, he suggested the use of mud thickened with bentonite before spotting the cement so as to allow a greater density difference. With respect to the problem of controlling the direction of flow of the cement slurry a diverter placed at the end of the tubing to help divert the direction of flow and improve stability. Drilling fluid can also be used as a plugging material by adding a cementitous additive. The additive can either be fly ash of blast furnace slag which have the characteristics of a cement as they harden when the mixed with water. Cement is not naturally occurring but manmade and like any other manmade material, it is expected to age, wear-off, and, degrade overtime under different subsurface condition, which may differ from the time it was initially set [W. Zhou et. al 2005]. Plugging oil well is a common operation, which is increasing as mature field reach the end of their producing life. In general, plugging and abandonment of a well involves filling a certain length of casing or open hole with a volume of cement mixture designed for it in order to provide adequate sealing against upward migration of formation fluid. After the cement plug is place in the desired location it is left to harden over time. The placement of the cement plug is a major part of abandonment, as failure of this will cause commingling of fluids from different formation. The setting and spotting of cement plugs can be done in various ways depending on the wellbore condition and regulatory requirement. A review of the worldwide acceptable plugging procedure shows the a minimum of three cement plugs is required of which two are, the first plug is put in place by squeezing the cement plug through the perforation into the former producing zone in order to seal off any further influx of reservoir fluid into the Wellbore[2]. The second plug is usually set towards the middle of the Wellbore or near a protective casing shoe. Finally the third plug is set about200- 300ft below the mud line. In general, the length of a plug ranges from 100to 200ft depending on the regulatory requirements. Any additional plug set is dependent on the well bore condition. Although observations and studies show that cement plugs have the ability to perform as expected for up to several decades, uncertainty exists that the material can maintain its isolation integrity for several thousands of years. Recent study shows that abandoned wells in which CO2 was used in the enhanced oil recovery technique prior to abandonment have the potential to leak and allow CO2 migration notwithstanding the fact that the well has been properly abandoned [Scherer, G.W et al, 2005]. This is mainly due to corrosion and degradation of the casing and cement. This degradation and corrosion occurs when carbonic acid formed from the dissolution of CO2 in brine attacks the cement and casing [Scherer, G.W et al, 2005] a process, which is dependent on the temperature of the formation, cement composition, brine and the rock mechanics and composition. Potential leakage of reservoir fluids through degraded cement plugs is hence of primary concern. Various work on inter-formational flow shows that there is still the possibility of flow between formations even with a successful plugging of different interval. This case can arise when the abandoned well is near an active well. Javandel et al developed the first analytical model; their model showed the possible of flow to an upper formation in response to a lower injection pressure build up in a lower formation. Striz and wiggings carried out further work by developing a coupled model to predict flow using a steady state approach to create a transient flow. This model can be used to developed abandoned fluid flow using available field data. In recent studies, statistics show that in the US one in every three well drilled for hydrocarbon is dry and have to be plugged and abandoned[D.G Calvert, et al 1994]. Wells are drilled for various reasons ranging from industrial, oil and gas, to municipal uses, but in the end these well have to be abandoned [D.G Calvert, et al 1994]. Some wells were abandoned before any regulation and guidelines were defined, these wells may have either been plugged improperly or not plugged at all and these now poses a threat to the quality of the groundwater. For the aim of regulating bodies to be achieved i.e. achieving underground water protect and hence environmental protect, the operating companies must understand that following the different regulatory requirement alone is not sufficient to guarantee a lasting protection of the environment [4]. It is sometimes difficult for operators to abide by the regulatory requirements as well as developing a plan which would both serve to seal off the reservoir and provide long-term protection of the environment while justifying the overall cost in general [4]. Currently there is a high rise in abandonment of ageing and mature field which either have reached their economic limit or are no longer producing (refer). Methods of ABANDONMENT The initial stage of a decommissioning process is the plugging and abandonment of the wells, during this stage, the tubing, casing strings, and, conductors are cut below the mud line and removed, zones are sealed with cement plug to isolate the flow path between the reservoir fluids and other zones as well as the surface. Zones not sealed with cement plug are filled with mud with fluid having the proper weight and consistency to prevent movement of other fluids into the wellbore. Most abandonments follow a general methodology that is adjusted to meet individual well requirements. As procedures can and do change significantly for each well, cement plug design should frequently be attuned to reach minimum wait-on-cement (WOC) times with varying downhole conditions. Near-wellbore geology should be assessed, and the wellbore and annuli properly cleaned to avoid microannuli and poor cement bonding. Traditional techniques include cement squeezes, gel squeezes, and mechanical plugs such as bridge plugs and packers. Cement and gel technologies are mainly used for behind casing repair, and mechanical options are usually confined to plugging the casing. In the general process of abandonment there as basic steps which are followed to ensure successful plug and abandonment program. This includes the planning process, wellbore equipment testing, designing, well geometry assessment. PA PLANNING The most essential decision after when to abandon a well [11] is how. Preparation is a key ingredient in plug and abandonment of a well. In order to abandon a well successfully careful planning and effective plugging and abandonment procedure is crucial to prevent gas or fluids from moving to the surface or to other subsurface formations. In addition to the environmental risks that come with poor seals, corrective plugging may be necessary, increasing the cost and difficulty of abandoning a well. However, operators and service companies have several options for obtaining complete, permanent abandonment. For every well, there is a variation as each well PA is unique and different. The techniques used to achieve this process are generally based on industry practice, research, and conformance with the relevant regulatory compliance requirement. The synthesis of practical knowledge, current technology and regulatory requirements results in the most effective wellbore plugging and abandonment possible. Wellbore equipment testing. A preliminary inspection and survey of the wellhead and wellbore condition is carried out to determine if the valves on the wellhead are in operable condition, if it is found not to be in operable condition they are hot-tapped. The wellbore is surveyed using a slickline unit to check for any obstructions in the well, to confirm measured depth and also to gauge the internal diameter of the tubing. After the survey and removal of the slickline, the annuli and tubing is filled with fluid using a well pump is installed at the wellhead to ascertain an injection rate into the perforations. The tubing and casing are also pressured up to check for integrity. Casing annuli are also pressure tested to check for communication problems between casing strings and to record the test pressure over a period of time. The integrity and reliability of the primary cement is assessed in order to ensure that the cement sheath is still providing isolation across the reservoir and the cap rock. A well control plan is designed to establish reservoir condition and subsequently the contingency responses to any event which may occur during the abandonment process. DESIGN OF A WELL ABANDONMENT PROGRAM Prior to plugging and abandoning a well, a review of the existing well design, record of past work, previous well performance and geologic and reservoir condition is carried out by the operator. The investigation of everything that may relate to the health and safety issues as well as regulatory requirements is also performed, after which the design of the abandonment program begins. The design is done based the existing wellbore and reservoir conditions depending on the findings from the review and investigation. This allows the operator to plan an abandonment program that will satisfy the goal of making the well safe from future resources. PA design needs to be integrated in the planning of the well, and should be considered in a single budget. There are many factors which must be put into consideration in order to design an effective abandonment program , such as, the reservoir status, the integrity of the primary cement, hole cleaning and cement placement technique, the temperatu re and pressure of the well, the type of fluid in the well, the age of the well, the status of the cap rock. Fluid Type Drilled wells produce fluids in liquid and gaseous form, wells which contain sour fluids i.e. sulphur rich would be expected to have accelerated corrosion rates and stress cracking depending on the age and wellbore construction, may impair the capacity to perform plug and abandonment, to mitigate this components which are corrosion resistant can be used. Reservoir status In the design of PA, it is necessary to consider the reservoir status concerning its stability, the current pressure and temperature, the pressure at the initial stages of well development and the permeability of the reservoir both horizontal and vertical. With the information, plug and abandonment is then designed to withstand the pressure of the well after finally reach equilibrium. Cap rock Status It is also necessary to take into consideration the cap rock status i.e. is it still impermeable, has production activities induced fracture or has weathering taken effect. Placing the Plugs After the design and planning of the abandonment program, calculations must be made to determine the amount of cement required and the number of wiper plugs needed to separate the cement plugs from the rest of the fluids. The use of wiper plugs enables the formation of a stable platform on which the cement can be set. A wiper plug is placed in the wellbore, and then a predetermined quantity of cement slurry is pumped on top of it. Because of its weight, the slurry becomes a driving force. The slurry falls to the bottom of the hole, pushing the wiper plug ahead of it and forcing existing air and produced fluids back into the formation. Another plug and perhaps a bit more cement finish the job. In most wells, where there is one permaeble zone, one plug and one volume of cement and the surface plug are all that is needed. In other wells, additional wiper plugs, additional cement slurry, and probably spacers of water or drilling fluid are used consecutively until all of the air and fluid is forced out into the formation, there is zilch pressure on the pipe, and it is apparent from the returns that the whole wellbore is appropriately sealed. The quantity and kind of spacer fluid that can be used is dependent on individual state regulations. The remaining casing at the top of the well is cut off 3 ft below ground level. Along with this general methodology, each region stipulates its own abandonment methods based on field conditions and local regulations as can be seen in the following examples. PA steps in Los Angeles Basin in as follows [12]: The abandonment program is prepared with the support of a qualified engineer. A schematic showing the current mechanical condition of the well is prepared. The geologic condition of the well, including the structure, faulting, and producing zones is assessed. The depth and position of cement plug that will cover the producing zones and any potable water zones if applicable is measured and verified. Choice of whether to use perforating or cavity shots is made. The casing is pressure tested after setting cement retainers. The different equipment required for the job is determined and assembled. Estimate of abandonment/re-abandonment costs is made. In contrast, the steps followed for the Hutton tension-leg platform (TLP) in the East Shetland Basin of the North Sea involved three phases [13]: Perform standalone wireline intervention. Perform drilling unit intervention to set the cement plugs after the first wireline plug has been set. Cut casing 10 ft below the seabed and recover casing stumps. Another abandonment performed in the North Sea followed a different procedure [14]: A permanent cement primary barrier placed immediately above the reservoir. A secondary barrier placed as a back-up to the first barrier. A third barrier then placed near the surface to isolate shallow water-bearing sands. Severed completion tubing and recover wellhead. In Western Canada, the traditional abandonment procedure of wells with casing vent flows included the following: The source of the casing vent flow is estimated or determined. If the source zone is shallower than the producing zone, the producing zone is abandoned. The source zone is perforated. Depending on the feed rate obtained at the estimated source depth, either a bradenhead or a retainer squeeze is performed. Retrievable tools are used as required. Typically, Class G cement with Calcium Chloride and some fluid-loss control is utilized. The slurry is placed and a static squeeze pressure of 7 MPa is attempted. As needed, cement is drilled out and perforations are tested for seal. Often, several attempts are made in order to obtain a static squeeze pressure of 7 Mpa on surface or mitigate the casing vent flow. Techniques for Abandonment The techniques used for plugging and abandonment of drilled well worldwide are generally based on industry practise. These techniques include; Rig Coil tubing unit Rigless abandonment COIL TUBING UNIT The flexibility of coiled tubing has recently been tailored to develop rigless abandonment [15,16]. This method, focuses on harmonizing all well services to accomplish utmost efficiency. Coiled-tubing unit [fig.] abandonment, like any other method, is more effective when appropriate cementing procedure is used from the kick-off of the well, from original zonal isolation with the primary cement sheath to plugging and abandonment. Early prevention of microannulus can help operators obtain a complete final seal. Five main criteria are recommended for optimal abandonment performance with coiled tubing: Mobility; All equipment should be mounted on wheels for increased mobility. Self-sufficiency; the service company provides nearly all activities. Dry location; Fluids are not drained on or near the wellsite. Single operation; the job is completed in one visit to the wellsite. Low mileage; Move time is reduced and transport optimized for maximum efficiency in unit and camp moves. In this abandonment technique geological consideration like the type and condition of the reservoir and caprock formations are take into account. Permanent seals typically must be made between producing zones and at impermeable caprock formations. The condition and configuration of cement, perforations, tubulars, and downhole equipment are also considered. In addition to providing complete, permanent seals, the use of coiled-tubing can help increase abandonment efficiency. This method can provide the following advantages: Increased tripping speeds Increased rig-move efficiency Precise placement of cement plugs; exact spotting of plugs at the interval of interest even in deep well as coil tubing can be reciprocated while pumping. Suitable for use on live wells; it is possible to run CTU for remedial cement squeeze in live well as the wellbore can be controlled using the BOP and stripper assembly. No need to pull production tubing; existing tubing and wellheads do not have to be removed to access the producing interval. Success using the coil tubing method has been recorded in Oman. REGULATORY REQUIREMENT FOR ABANDONMENT IN THE NORTHSEA AND USA In the early years on the oil and gas industry, many wells were drilled and some were found to be dry and subsequently were abandoned without much consideration given to the manner in which the wells were abandoned. Sometimes tree stumps were thrown in the well as a means to plug it [3], during this era the preservation of the groundwater, in general, the environment was not a major issue, and there was no defined regulation by the oil states or agencies. During the tail end of the 1930s different states and agencies in the US started establishing regulations, this defined requirement to ensure better well abandonment [D.G Calvert, et al 1994]. The number of regulation guiding well abandonment has risen along with the rising need to protect the environment in countries around the world. Today most countries have some form of regulation that addresses well abandonment requirement; though these regulations are not uniform and differ from country to country and body to body, they provide a minimum standard for operating companies. For instance for the state of California in the United States of America, the different governing bodies have their own regulations which are as follows; Minerals Management Services (MMS): The basic plugging requirements are found in 30 CFR 250.110 Subpart G. Department of Conservation, Division of Oil: Gas, and Geothermal Resources (DOC) The California Code of Regulations Title 14 Division 2, Chapter 4 beginning with Section 1745 focuses on the fundamental plugging requirements. California State Lands Commission (CSLC): The fundamental plugging requirements in the California Code of Regulations Title 2 Section 2128(q). Abandonment in the North Sea In the North Sea as in US, the regulations differ. The different countries that make up the North Sea have their different governing bodies and subsequently different regulation. The law in the UK, Norway, Denmark and Holland holds the last operator of a well accountable and responsible to pay for all the cost incurred in permanently abandoning the well. It also holds them accountable for any leakage and any clean up that may be required in the event of a leak. Abandonment programs in the Northsea are designed to meet the guidelines for abandonment issued by the operation association or government. For the UK sector of the north sea, abandonment guidelines is issued by the UKOOA, similarly for the Norwegian sector the guidelines are contained in the NORSOK/PTIL D-010 standard and for the Netherlands it is contained in the Dutch Mining