Day 2 Wed, December 01, 2021最新文献

{"title":"Abandonment Best Practices in Unitised Area for Wells and Facilities Straddling Two Countries in Malay Basin: A Case Study","authors":"K. Nathan, M. Ghazali, M. Abdul Razak, Ismanto Marsidi, Jamari M Shah","doi":"10.2118/208467-ms","DOIUrl":"https://doi.org/10.2118/208467-ms","url":null,"abstract":"\u0000 Abandonment is considered to be the last stage in the oil gas field cycle. Oil and gas industries around the world are bounded by the necessity of creating an abandonment program which is technically sound, complied to the stringent HSE requirement and to be cost-effective. Abandonment strategies were always planned as early as during the field development plan. When there are no remaining opportunities left or no commercially viable hydrocarbon is present, the field need to be abandoned to save operating and maintenance cost. The cost associated on abandonment can often be paid to the host government periodically and can be cost recoverable once the field is ready to be abandoned.\u0000 In Malaysia, some of the oil producing fields are now in the late life of production thus abandonment strategies are being studied comprehensively. The interest of this paper is to share the case study of one of a field that is in its late life of production and has wells and facilities that planned to be abandon soon. The abandonment in this field is challenging because it involves two countries, as this field is in the hydrocarbon structure that straddling two countries. Series of techno-commercial discussion were held between operators of these two countries to gain an integrated understanding of the opportunity, defining a successful outcome of the opportunity and creating an aligned plan to achieve successful abandonment campaign. Thus, this paper will discuss on technical aspects of creating a caprock model, the execution strategies of abandoning the wells and facilities and economic analysis to study whether a joint campaign between the operators from two countries yields significantly lower costs or otherwise.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115096089","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":"Offline Well Abandonment SIMOPs: An 81 Well Phase I & II Case Study Enabling ABEX Reduction in South East Asia","authors":"S. A. Canny, Jane Amarin, V. Pinprayong, Chumpae Sratongroy, Pancharat Pitchayang, Vijak Patanapoothong, Thatree Sonsai","doi":"10.2118/208482-ms","DOIUrl":"https://doi.org/10.2118/208482-ms","url":null,"abstract":"\u0000 In the decommissioning phase of oilfield facility lifecycles, focus pivots from positive net present value to executing the care and preservation, then decommissioning in the safest and most environmentally sensitive manor, and at the lowest total cost of ownership. Asset Retirement Obligation (ARO) is a long-term liability carried on the balance sheet, as a provision for the cost to return a wellsite to pre-exploration condition. The reduction of abandonment and decommissioning expenditure (ABEX) in executing compliant operations is a key business performance factor, and critical in executing higher volumes of wells earlier than planned. In doing so maximizing value to company shareholders, residents, industries and government level stakeholders.\u0000 In the case study, an offline pre-abandonment and Phase I primary reservoir isolation project is presented, which seeks to maximize net project efficiency via offline wellbore intervention, executing the primary reservoir isolation of the wellbore via rigless techniques. This approach contributed to ABEX reductions by up to 40% per well vs the planned approval for expenditure (AFE) provisions taken for the operations.\u0000 The project execution structure utilized offline intervention and Phase I primary reservoir isolation of 81 wellbores, across 5 wellhead platforms and 47 days continuous operations. Operations were part of a simultaneous operation (SIMOPS) project, as an offline work front located on the wellhead platform (WHP) weather deck. A second work front for Phase II and Phase III well abandonment operations, is executed concurrently, from the jack-up rig cantilever above the WHP. Live well operations are conducted concurrently by both work fronts, through the Christmas Tree (XT) and pressure control equipment in Phase I, and through the drilling riser and blowout preventor for Phase II and Phase III, to maximize productivity when the rig is on location.\u0000 The scope of operations included wellhead qualification, wellbore access and preparation, well kill, injectivity testing, various wellbore preparation and cement placement techniques, pressure testing and lubrication of the wellbore. The operator's system engineering, design of operations and planning agility are key to its success. Acute focus was given to the batching of operations and delivery of these in a phased approach to increase productivity and maintain high service delivery through repetition of tasks.\u0000 The project successfully executed Incident Free Operations (IFO) with 100% productive time and facilitated combined project performance, which delivered wells up to 44% ahead of the planned AFE. To enable this, over 4.19 million feet of slickline was run, conveying 428 bottom hole assemblies (BHAs), preparing the wellbores to isolate 804 primary reservoirs, and 2 intermediate reservoirs.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130613666","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":"Advances in Abandonment and Disposal Technology of Aging Oil and Gas Pipelines","authors":"J. Jing, Wenlu Wang, Dongrong Wu, Jinhua Luo, Shuang Zeng, Tianlun Zheng, Hongkun Chen","doi":"10.2118/208493-ms","DOIUrl":"https://doi.org/10.2118/208493-ms","url":null,"abstract":"\u0000 When the operation benefit of an oil and gas pipeline is not enough to cover its operation cost, and the pipeline is no alternative use, seriously damaged, aged or the operation risk exceeds the acceptable range, it is bound to cause serious safety and environmental hazards along the pipeline, especially for the over age pipeline in service, therefore its scientific abandonment and reasonable disposal is particularly important and urgent.\u0000 Focused on the methods for judging abandonment, retirement modes, cleaning and environmental management of oil and gas pipelines, the characteristics of existing methods for predicting the remaining life of the pipelines and their application in abandonment and disposal are compared and analyzed, and the basis and adaptability of oil and gas pipelines retirement are illuminated. According to the actual situation and environment of the discarded pipelines, the selection basis and applicable conditions of the pipeline and facility disposal methods such as demolition, in-situ shelving and their combination are expounded.\u0000 It is found that North America has rich experience and mature technology in oil and gas pipeline abandonment and disposal, but many countries, including China, seriously lack scientific and systematic evaluation standards, practical experience, related theoretical and technical investigations. This study has important reference and practical significance for promoting the development of abandonment and disposal technology of an aging oil and gas pipeline, and ensuring the personal safety and ecological environmental protection along the abandoned pipeline.\u0000 This paper presents the status quo of over age service and abandonment decision-making of oil and gas pipelines in the world, draws lessons from the experience of safety and environmental protection disposal of the global abandoned pipelines, and puts forward the principle and method of abandonment judgment and scientific disposal of the aging pipelines based on residual life evaluation. This method has sufficient basis, strong adaptability and wide application.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115853970","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":"Challenges and Lessons Learnt on Waste Management and Disposal from Mauritania Deepwater Abandonment and Decommissioning Campaign","authors":"Ahmad Hafizi Bin Ahmad Zaini, M. K. Bin Rahim, M. H. Bin Razak, S. Moir","doi":"10.2118/208472-ms","DOIUrl":"https://doi.org/10.2118/208472-ms","url":null,"abstract":"\u0000 Abandonment and decommissioning activities of oil and gas assets had been on the increasing trend. As an activity of minimal to no economic value return, the investment into Abandonment and Decommissioning (A&D) should be properly strategized to ensure all objectives are met safely within available time and resources. This paper will discuss Operator's strategy in planning and handling waste from A&D activities of fifteen (15) deepwater subsea wells in Mauritania, West Africa.\u0000 The approach of this A&D project at a remote location was done in two separate campaign instead of a single campaign based on technical and commercial evaluations performed by Operator. Subsea structures, Christmas trees, tubulars and others are expected to be retrieved and disposed according to local and international standard. In general, Operator are expecting two (2) type of waste which are non-hazardous waste and hazardous waste due to hydrocarbon or naturally occurring radioactive material (NORM) contamination.\u0000 Due to the limitation of capable hazardous waste handling and disposal in country, Operator decided to export waste to identified facilities outside of country at the end of the project via sea-freight. Operator appointed one contractor to provide a full-service related to the waste management and disposal that covers field services and onshore services that includes radiological monitoring to identify NORM waste, labelling, packaging at offshore, onshore storage, transportation and logistics that include Trans-Frontier Shipment (TFS).\u0000 The strategy of appointing one contractor for full service of waste management and disposal has promoted a single – point accountability to the contractor and this has enabled the objective been delivered effectively.\u0000 COVID-19 pandemic posed a great challenge on cross-border logistic planning due to additional measure been imposed by receiving country. Furthermore, the new development of United Kingdom exiting European Union (BREXIT) also posed some level of uncertainty to the contractor to obtain relevant approvals for waste export.\u0000 To reduce the amount of waste to be export, Operator continuously looking for and successfully found a local recycling facility that able to handle the non-hazardous waste while meeting local regulation, Operator's and industrial standard. All outlined strategy was proven to be effective for waste management in remote location, uncertainty on cross-border waste export challenge, as well as capitalizing on the limited local resources available.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125965394","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":"Onshore Yard Readiness for Upcoming Oil and Gas Offshore Structure Decommissioning Projects in Indonesia","authors":"Sari Amelia, J. Leow, Bisri Hasyim, Dega Damara Aditramulyadi, H. Kang, O. Yaakob, W. Punurai","doi":"10.2118/208474-ms","DOIUrl":"https://doi.org/10.2118/208474-ms","url":null,"abstract":"\u0000 More than a thousand fixed oil and gas offshore structures were installed in the Southeast Asia region. Indonesia currently has more than 600 offshore oil and gas platforms, nearly half of which need to be decommissioned within the next few years. While the regulators and operators are developing procedures and regulations for the decommissioning process of the offshore platforms, there is also a need to ensure that onshore facilities are available to receive the decommissioned structures and equipment and subsequently process them safely. At the moment, there is no yard in Indonesia that is well-placed to undertake onshore decommissioning activities. The aim of this study is to develop recommendations for yard owners to assure their yards are ready for the upcoming decommissioning projects. Research data was collected directly from field survey in an offshore fabrication yard, owned by PT. Meitech Eka Bintan, Indonesia. In the current study, research data was analyzed by comparing with decommissioning yard facilities in ABLE Seaton Port, United Kingdom which was used as offshore structure decommissioning yard since 1985. Recommendations include the work required to assure the yard comply with respective guidelines and industry best practices. The research begun with identifying the yard's potential to receive onshore decommissioning work based on current primary facilities which are quay and fabrication area properties. After that, a yard modernization assessment was carried out as to identify the best location for the upgrade on the missing required facilities. The results indicate that the primary facilities of the yard are comparable to ABLE Seaton Port with both having similar depth at quayside, capable of mooring barges and Heavy Lift Vessel (HLV), both having liquid containment system at the fabrication area and the large fabrication area at PT. Meitech Eka Bintan yard is sufficient similar to the area utilized by ABLE Seaton Port for Brent Delta topside decommissioning works. However, since the yard's main business is currently on offshore structure fabrication, hence there is a lack of waste handling facilities such as waste handling workshop and covered waste storage area to fulfill the respective guidelines and regulations. A case study was carried out to identify the onshore decommissioning working area and the location of the waste handling facilities on the yard. This study is expected to assist towards improving the readiness of yards to carry out onshore decommissioning not only in Indonesia but also in Southeast Asia region.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114965640","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":"Repurposing End-of-Life Wells for Geothermal Energy Production: An Evaluation of Mississippi Wells","authors":"Maryam Mirabolghasemi, M. Heshmati, Dakota Thorn, B. Shelton, F. Diop","doi":"10.2118/208498-ms","DOIUrl":"https://doi.org/10.2118/208498-ms","url":null,"abstract":"\u0000 End-of-life production or injection wells may be converted into wellbore heat exchangers for geothermal energy extraction. Whether this conversion is technically and economically feasible depends on several factors such as geothermal potential of the formation, well depth, and working fluid circulation parameters. Here we present a case study where we analyze these parameters and determine their optimum operational brackets. We focus on repurposing active wells that are located in regions with high geothermal potential in the state of Mississippi.\u0000 Geothermal gradient map of the state of Mississippi was used to select potential candidate wells. Well logs of these candidate wells were used to find formation temperature and other properties such as well diameter and depth. Next, we conducted heat transfer calculations to estimate the temperature rise of various working fluids as a result of circulating inside these wellbores. We ran sensitivity analyses to determine the effect of circulation rate, tubing insulation, and time. Finally, we estimated the power production potential of each well.\u0000 Our results indicate that geothermal energy production through repurposed end-of-life wells may be viable depending on well depth and geothermal potential of the region. With insulated tubing, the thermal energy delivered by a number of candidate wells is sufficient for a small-scale binary power plant with organic Rankine cycle.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129861693","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":"Managing the Salvage, Removal, Preservation and Re-Installation of Tilted Wellhead Platform","authors":"S. Zainal Abidin","doi":"10.2118/208486-ms","DOIUrl":"https://doi.org/10.2118/208486-ms","url":null,"abstract":"\u0000 This paper describes the planning, offshore execution and technology involved in the intact salvage, removal, preservation and relocation of a Wellhead Drilling Platform (WHP) which was tilted during drilling operation in the \"X\" field.\u0000 The field development plan consists of a WHP tied-back to a Floating, Production, Storage & Offloading (FPSO), anchored at 700 m away from the WHP. The oil field is located 110 km from shore and at water depth of 57 m. The Project Management Team (PMT) had completed the installation of the WHP, unfortunately mishap was happened when the WHP experienced tilting during drilling operation. The platform tilted/leaned two (2) degrees towards the drilling rig.\u0000 The strategy adopted by the PMT was to rig-down and move out the affected rig; immediately salvage the newly installed 1,300MT WHP's topside. The work was executed under the crisis management envelop with the aim to save the rig and platform from total loss i.e., to avoid the platform topples into the sea and subsequently hits the rig.\u0000 The salvage operation employed unique processes, procedures, and technology to safe hold the tilted platform by Anchor Handling Tugs (AHTs) and pipelay barge; rig-down and move out the drilling rig, reinstatement of lifting lug/pad eyes which had previously removed after completion of topside installation and finally removal of topside from the tilted jacket. The topside then transported to the fabrication yard, where there the topside had been preserved on the transportation barge for a period of five (5) months while waiting for the new jacket to be fabricated and installed. The re-development of the affected offshore facilities from the incident involved installation of new jacket at 150 m away from the tilted jacket location, re-installation of the topside to the new installed four (4) legged jacket, re-routing the previous installed infield pipelines (8\" Liquid, 16\" Wet Gas and 12’ Export Gas pipeline from FPSO) and tied-in to the new platform. The planning, innovation and execution has resulted in a significant cost containment and managed to avoid major disaster; subsequently safeguard Company's reputation. The salvage of the topside and rejuvenation of the pipelines have managed to avoid the reconstruction of the topside module which potentially could lead to non-cost recovery of huge amount of additional cost (in USD millions) and managed to avoid any Loss of Primary Containment (LOPC) by taken all the necessary precautions.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132593503","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":"Low Cost Plug and Abandonment with Hybrid Hydraulic Pulling Unit","authors":"Tengku Khairul Izwan Tengku Ahmad, Abdul Hanif Abdullah","doi":"10.2118/208473-ms","DOIUrl":"https://doi.org/10.2118/208473-ms","url":null,"abstract":"\u0000 Plug and Abandonment (P&A) operations with conventional Hydraulic Workover Unit (WHU) have an enormous benefit and impact on low-cost P&A campaign in Malaysia compare with using conventional drilling rig. Subsequently, this Hybrid Hydraulic Pulling Unit (HHPU) was the first successful deployed and safely delivered for P&A campaign together with conductor removal in offshore West Malaysia.\u0000 This paper presents case study that showcase the capability of HHPU for low-cost permanent P&A campaign by eliminate requirement for additional bringing rigging-up and rigging-down of casing jack unit for conductor removal operation. The unit manage to cut and pull-out the existing completion strings, setting cement plugs, cut and pull-out multiple strings of casing along with retrieving the 24″ conductors delivering the most advantageous outcome for P&A campaign safely, efficiently and cost effectively. It was invented from 340K HWU with improvise features that capable of pull-out existing completion string and removal of the conductor with size up to 36″.\u0000 This paper demonstrates a unique combination of techniques and equipment of a successfully low-cost P&A operation with excellent client satisfaction with no incident and accident were recorded. The end results may contradict traditional P&A methods, but the case history can be used for future reference or potential replication in South East Asia region.","PeriodicalId":211321,"journal":{"name":"Day 2 Wed, December 01, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133689562","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}