Day 1 Tue, November 30, 2021最新文献

{"title":"Advancements in Techniques for Complex Plug and Abandonment Using Survey Management and Magnetic Ranging Methods","authors":"J. Dorey, Georgy Rassadkin","doi":"10.2118/208485-ms","DOIUrl":"https://doi.org/10.2118/208485-ms","url":null,"abstract":"\u0000 Complex plug and abandonments are required when it is not possible to permanently seal a wellbore utilizing conventional methods. This paper will provide an overview of advanced survey management techniques and their application to complex wellbore abandonment operations. The overview will include the utilization of technologies including active magnetic ranging, gyroscopic and magnetic surveys, and advanced survey correction algorithms. The economic benefits due to the successful outcomes will be shown as well as the mitigation of potential environmental hazards to groundwater aquifers.\u0000 The described methods have been proven in real-world scenarios, where complex technical challenges necessitate the requirement of a complex abandonment. Two case studies will be presented; one operation where the target well suffered from a restriction in the casing that prevented access to the reservoir, and another where a wellbore was found during civil construction activities in an unexpected position and created a high-risk challenge due to the potential for reservoir gases and liquids leaking uncontrolled into the construction zone.\u0000 The application of these techniques in abandoning complex wellbores that are unable to be plugged by conventional means provides the industry with solutions to the technically challenging problem of wellbore abandonments when physical access to the wellbore is not possible. These techniques provide economical and low-risk solutions to operators in both onshore and offshore decommissioning activities.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126260557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Success Story of First Malaysia Flare Tips Decommissioning in Sarawak Offshore Field Platform","authors":"M. S. Ahmad Shatiry, Tajul Ekram Tajul Arif, Norhafizah Baharuddin, Firdaus Harun, M. Asmadi, Saiful Adli B. Ismail, Abdul Malik Nazli, Mohamad Faiz Ishak, Syamsul Hafzan Ab Hamid","doi":"10.2118/208622-ms","DOIUrl":"https://doi.org/10.2118/208622-ms","url":null,"abstract":"\u0000 The project was for part production enhancement project which to cater for brownfield & greenfield project. To cater to the production (oil) increment for the brownfield project, the existing flare tips and separation system need to be upgraded with higher capacity. The inclusive project was upgrading existing. Part of the scope was decommissioning the existing flare tip and associated system, e.g., ignition panel and ignition pipe. The project will decommission the current flare tips and replaced it with new higher capacity flare tips with Low Pressure (LP) & High Pressure (HP) connection. The existing flare panel was a single-type ignition system. The existing flare tip had LP & HP tip with 8″ inch size; the weight for both tip was estimated at 300 kg. The concept selection was discussed on the suitable method to lifting down the decommissioning flare tip at the offshore platform. There were 2 suitable techniques selected at the initial of the concept selection. One was lifting down the decommissioning flare tip directly from flare boom to vessel. Another method was manual rigging of the flare tips from the flare boom to the lower deck. After several discussions and workshops, it was decided to proceed with manual rigging of the decommissioning flare tip to the safe deck area. The removal of the decommissioning flare tip was performed during turnaround. The total days for the overall activity of the decommissioning & installation of the new flare tip was 3 days, 2 days ahead from planned duration 5 days.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116349100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Best Practices for Managing Subsea Well Plug and Abandonment Operation in Offshore Malaysia During COVID-19 Pandemic","authors":"Arie Muchalis Utta, Junnyaruin Barat, L. Maluan, Mohd Zulkifli Omar, F. Yahaya, Budi Mawardi Nasron","doi":"10.2118/208465-ms","DOIUrl":"https://doi.org/10.2118/208465-ms","url":null,"abstract":"\u0000 In 2020, PCSB implemented the first permanent Plug & Abandonment (P&A) campaign for three Subsea wells in a gas field offshore Malaysia. The main objective of the campaign was to establish two (2) barriers for every movable hydrocarbon or overpressure bearing sand by placing laterally extended cement plug across impermeable formation with enough formation strength to handle the pressure of the formation to be isolated. The unique case of this operation was the challenges to execute PCSB's first subsea P&A operation in gas field Malaysia during pandemic situation. In March 2020, the Malaysian government imposed Movement Control Order (MCO) to curb the spread of the COVID-19. A semi-submersible rig was on-hired a week after government initiated the MCO, resulted in the rig preparation being badly hampered due to manpower management and material fabrication and delivery. PCSB was exposed to expensive rig daily rate that had to be managed. Four (4) main challenges were encountered during operation: safe protection for workers, expensive standby cost, manpower management and material fabrication and delivery. This paper, from the ‘project management’ point of view, describes the journey of managing rig operation during PCSB's first subsea wells P&A in Malaysia efficiently amidst the pandemic by reducing the impact of COVID-19 on project cost. With the experience of managing rig for subsea well operation, a complex operation in Malaysia, amidst pandemic, PCSB sharing on the experience is beneficial to provide context setting and benchmark on maintaining the efficiency of operation. Wells successfully met the objective of operation with no incident occurred, negotiated reduction on standby cost and managed to bring critical manpower on time during operation.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130596277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimisation of Plug and Abandonment Process Utilising Nuclear Technology for through Tubing Cement Evaluation","authors":"Konstantin Valouiski, Afiq Azreen Zainuddin, A. Kalistratov, Ahmad Zawawi Abd Rajab, Siti Najmi Farhan Zulkipli, M. M. Misren, Arun Balachandran, Siti Nor Dahliawati Zulkefli, Adli Zaim Awal","doi":"10.2118/208478-ms","DOIUrl":"https://doi.org/10.2118/208478-ms","url":null,"abstract":"\u0000 One of the major factors in the well plug and abandonment (P&A) process is to provide a proper isolation in aging wells which requires effective placement of the cement plug in the most suitable location in the well. Identifying cement placement is usually achieved by running cement evaluation logging to define the quality of cement and top of cement depth behind and in between the casing annuli.\u0000 However, this comes with significant costs due to tubulars or casings removal requirement prior to logging run in order to conduct a proper evaluation. This is necessary since acoustic and ultrasonic based cement evaluation technologies will not be able to determine cement quality behind several casing layers if the job is done through tubing. The cost involved is substantial especially in offshore operation in which the daily operating rate is significantly higher compared to an onshore operation.\u0000 A new approach to cement evaluation has been tested during the well P&A campaign in one of the aging oil fields in offshore, Peninsular Malaysia. A nuclear based technology comprised of Gamma-Gamma, Neutron-Neutron and Neutron-Gamma measurements were utilized to evaluate cement integrity behind production casing and between production casing as well as intermediate casing while logging run was deployed through tubing in memory mode.\u0000 Log data was compared with acoustic and ultrasonic based cement evaluation technology that was deployed after the tubing was pulled out in one of the wells. Results had shown a consistent finding with the conventional ultrasonic based cement evaluation data. Based on the logging results, cement placement design and depth was finalized and the cement plug was successfully tested as outlined in the well P&A guideline.\u0000 Findings from this logging run had provided useful insight to the operator to validate the nuclear based thru tubing cement evaluation technology for wells P&A application. Huge cost saving could be captured through this application as a result of eliminating total rig days via offline cement evaluation logging and based on the results obtained planning for the exact well P&A design requirement prior to the rig arrival.\u0000 This paper will outline the method, tools used to acquire the cement evaluation data and its operational advantages. Acquired data will be presented and discussed along with the methodology used to determine cement volume and top of cement depth behind and in between the casings.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123777006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Research on Decommissioning and Abandonment Engineering Practice of Onshore Oilfield: A Case Study of Block 1/2/4 in South Sudan","authors":"Qi Liu, Huifeng Liu, Xi Wang, Wanjun Li, Guobin Yang, Baletabieke Bahedaer, Long Yan, Jun Yan, Yifeng Yang, H. Tian, Peng Lu","doi":"10.2118/208494-ms","DOIUrl":"https://doi.org/10.2118/208494-ms","url":null,"abstract":"\u0000 At the end of the lifespan of this onshore oilfield development, all wells and oil production system, transmission pipelines and all surface infrastructures shall be decommissioned in accordance with international guidelines for abandonment of oil and gas facilities.\u0000 The development and production period relevant to Block 1/2/4 shall be ceased in 2033 as the PSC law approved by South Sudan Government. Considering that South Sudan is located along the Nile River in Africa, necessary measures shall be taken with respect to activities in the field to ensure effective protection for the environment. In addition, difficulties which have negative impact on decommission assessment shall be taken into account, such as inadequate wells data, the destruction of the facility by war, high security risks of Block 1/2/4, costly decommissioning and abandonment fees and so on.\u0000 This paper combines the practice of Block 1/2/4 in South Sudan to introduce the decommissioning plan, abandonment working process, standard operation procedure for wells and surface facility disposal, and the calculation of the decommissioning fund. The decommissioning may include complete removal or abandonment in-situ which based on an evaluation of cost, safety and environmental impact. While a detailed decommissioning and abandonment proposal has been compiled and updated during the production phase of the project. When the final decommissioning and abandonment plans have been developed for upstream and midstream, the costs have been updated accordingly. These estimates had utilized by the operators to fund the decommissioning and abandonment obligations in accordance with the provisions of the oil company. The D&A task was successful and finally approved by the authority of government.\u0000 Due to the successful completion of the decommissioning task of Block1/2/4, a completed decommissioning and abandonment management system has been established, including D&A cost calculation and standard operation procedure for wells and facility disposal, which can lower the environmental risk and reduce the capital expenditure at the end of the project. It can be regarded as a classic practice in petroleum industry and has a strong reference value.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124138732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subsea Gas Well Late Life Restart Lesson Learned: Failure Analysis and Operating Strategy","authors":"Song Wang, L. Lau, Wu Jun Tong, Kun An, Jiang Nan Duan, Xing Wang","doi":"10.2118/208620-ms","DOIUrl":"https://doi.org/10.2118/208620-ms","url":null,"abstract":"\u0000 This paper elucidates the importance of flow assurance transient multiphase modelling to ensure uninterrupted late life productions. This is discussed in details through the case study of shut-in and restart scenarios of a subsea gas well (namely Well A) located in South China Sea region. There were two wells (Well A and Well B) producing steadily prior to asset shut-in, as a requirement for subsea pipeline maintenance works. However, it was found that Well A failed to restart while Well B successfully resumed production after the pipeline maintenance works. Flow assurance team is called in order to understand the root cause of the failed re-start of Well A to avoid similar failure for Well B and other wells in this region.\u0000 Through failure analysis of Well A, key root cause is identified and associated operating strategy is proposed for use for Well B, which is producing through the same subsea infrastructure. Transient multiphase flow assurance model including subsea Well A, subsea Well B, associated spools, subsea pipeline and subsea riser is developed and fully benchmarked against field data to ensure realistic thermohydraulics representations of the actual asset. Simulation result shows failed restart of Well A and successful restart of Well B, which fully matched with field observations.\u0000 Further analysis reveals that liquid column accumulated within the wellbore of Well A associates with extra hydrostatic head which caused failed well restart. Through a series of sensitivity analysis, the possibility of successful Well A restart is investigated by manipulating topsides back pressure settings and production flowrates prior to shut-in. These serve as a methodology to systematically analyze such transient scenario and to provide basis for field operating strategy.\u0000 The analysis and strategy proposed through detailed modelling and simulation serves as valuable guidance for Well B, should shut-in and restart operation is required. This study shows the importance of modelling prior to late life field operations, in order to avoid similar failed well restart, which causes significant production and financial impacts.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"35 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114117855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Inverted Umbrella Technique in Offshore","authors":"Yogesh Pravin Parmar","doi":"10.2118/208619-ms","DOIUrl":"https://doi.org/10.2118/208619-ms","url":null,"abstract":"\u0000 The oil and gas industries are setting a new achievement every day by fulfilling the energy security of almost all the nations. With the continuous rise in the demand of a hydrocarbon, industries are facing many new challenges while fulfilling it. One of the major concerns is the safety of an environment and safety of working professionals that HSE Department is continuously focused in. The industry has been in continuous upgradation since its inception to counter all the challenges. Inverted Umbrella Technique (IUT) is the recent innovation in the industry and this could be further more conceptualized by adding its role into the energy industries. This could turn out as a major breakthrough in the oil and gas domain from HSE perspective. The paper here aimed for providing efficient solution by setting up the system that could help us to drawdown the rising concern in the safety of the environment. Inverted Umbrella Technique (IUT) could roll down the new horizons for the offshore productions system in oil and gas industries. The concept is focused on the minimal loss of methane during exploitation of gas hydrates as well as focused on the prevention of oil spill and reducing the damage that blowout of oil or gas well can make to the environment while making sure that industries do not suffer any kind of major capital loss and making it safe for industries to not face many health, safety, and environment (HSE) norms that are decided by the government and most important is, it will help us to create a safe environment for aquatic species living around the offshore platform and nearby.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126041566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pipeline Decommissioning: Comparative Study of Pipeline Corrosion in the North Sea and the Gulf of Thailand","authors":"Jose Campins Bravo","doi":"10.2118/208470-ms","DOIUrl":"https://doi.org/10.2118/208470-ms","url":null,"abstract":"\u0000 The long-term degradation of decommissioned pipelines left in situ is an important topic in decommissioning projects. These constitute a long-term health and safety challenge in the form of snagging risk to other users of the sea. An accurate forecast of the long-term behavior of the pipelines in the marine environment would allow to make an informed decision regarding the feasibility of leave in place option for pipeline decommissioning.\u0000 This paper aims to summarize the effect that individual environmental factors in marine corrosion have on the corrosion rate and to discuss in detail a chosen corrosion model that could be used to predict the long-term corrosion of in situ decommissioned subsea carbon steel pipelines in the marine environment.\u0000 In addition, the long-term degradation will be predicted with the chosen corrosion model and the results will be compared for a range of subsea pipelines to be decommissioned in the North Sea and the Gulf of Thailand. With the chosen corrosion loss model, considering the higher average annual seabed temperature in the Gulf of Thailand in comparison with the North Sea, the predicted long-term corrosion rate of unprotected carbon steel is 0.053 mm/y for the North Sea and 0.069 mm/y for the Gulf of Thailand.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122766208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Deep Water Field Alpha Plug and Abandonment Campaign – An Integrated Approach to Optimize Operations and Costs","authors":"Frederic Robail, Nor Athirah Kamaliah Ahmad Tarmizi, M. S. A. A. Bakar, Adib Akmal Che Sidid, M. Zakaria, S. Zulkipli","doi":"10.2118/208490-ms","DOIUrl":"https://doi.org/10.2118/208490-ms","url":null,"abstract":"\u0000 After having been developed in the early 2000's and put on production since then, the deep water (700 M water depth) Field Alpha is now at the end of field life and in the plug and abandonment (P&A) process. Although this field-life phase does not make any money for an E&P operating company, it can be a liability and put the company's reputation at stake, if not done correctly. Therefore, like any other field-life phases, it requires a professional and multidisciplinary integrated approach to deliver it while reducing the company's exposure.\u0000 P&A campaign involves many stake holders: the local authorities, its technical and operational representative / auditor, the operator's well engineering community, the subsurface team, e.g., petrophysics team, and the operator's management. Understanding all their expectations and KPIs is primordial to prepare and successfully deliver such operations.\u0000 The P&A process relies on the placement of adequate \"barriers\" inside the well to guarantee blockade of any potential reservoir fluid communication either within separate reservoirs (to avoid any reservoir re-pressurization through cross flow) or with seabed / surface which could impact the environment. As part of the well barrier, annuli cement quality and efficiency must be checked by cement bond evaluation. The petrophysics team has the responsibility to both define, in collaboration with others team members, the cement quality criteria and then to evaluate the cement quality in timely and efficient manner.\u0000 In this campaign, which is expected to run for more than a year, with several petrophysicists involved both in the preparation phase and in the operation phase, e.g., execution and results validation, consistency in the process is of utmost importance.\u0000 This paper presents the workflow put in place by PETRONAS Carigali during the Field Alpha P&A campaign. It emphasizes on the petrophysicist role and responsibilities from the preparation phase, during the operations, and through the results validation.\u0000 The learnings and experiences acquired during the Deep-Water Field Alpha P&A campaign are now going to be transpose to domestic and international assets by means of corporate guidelines and workflows.","PeriodicalId":335246,"journal":{"name":"Day 1 Tue, November 30, 2021","volume":"51 Pt 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126233825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}