Day 1 Mon, December 03, 2018最新文献

{"title":"Cap Rock Restoration in Well Abandonment: Fit-for-Purpose Well Abandonment Design through Workflow Optimization and Integrated Assessment","authors":"Jing Zhi Kueh, H. Hassani, Mohd Dzulfahmi B Zamzuri, Ahamd Luqman B Johan, M. Z. Abidin, Khomeini Abdussalam, Zainuddin Yusop, M. A. N. B. A. Razak","doi":"10.2118/193965-MS","DOIUrl":"https://doi.org/10.2118/193965-MS","url":null,"abstract":"\u0000 Due to sharp oil price downturn in last few years, operators have been looking for ways to reduce operating expenses, especially on non producing assets. Well abandonment is proposed for non producing wells to reduce long term operating expenses. For well abandonment, traditional practice was well abandonment at reservoir level, with the purpose of securing entire well integrity as safety was the main concern. However, due to huge amount of time and cost associated to traditional well abandonment method, operators have been looking for optimization on well abandonment.\u0000 Field B is located in offshore Sarawak, and has been producing since 1968. Currently, Field B is in second half of its life cycle, and some wells and facilities are currently planned for decommissioning and abandonment. Well abandonment studies were initiated for 3 wells in Field B, with the purpose of reducing long term operating expenditures and minimize operation complexity. The studies are conducted by integrated team, consists of Petrophysicist, Reservoir Engineer, Production Technologist and Workover Engineer.\u0000 Well abandonment studies adopted integrated assessment approach, with the focus of reducing the time and cost related to well abandonment without jeopardizing safety requirements. As results, proposed abandonment intervals are significantly reduced compared to what has been planned initially. With simplified well abandonment plan, fit-for-purpose rig is used, and well abandonment operation cost is reduced with reduction in rig day rate. This paper will chronicle well abandonment optimization through workflow optimization and integrated assessment for well abandonment proposal.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126550120","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":"Seeking the Proper Decommissioning Method in Gross Split Era","authors":"Karyadi Junedi","doi":"10.2118/193963-MS","DOIUrl":"https://doi.org/10.2118/193963-MS","url":null,"abstract":"\u0000 PT Pertamina Hulu Energi Offshore North-West Java (PHE ONWJ) presently operates a fleet of more than 200 fixed offshore platforms and nearly three quarters of these platforms have been in operation for more than 30 years. Under newly implemented Gross Split Production Sharing Contract (PSC) scheme, PHE ONWJ is driven to seek an effective and efficient method for offshore platform decommissioning. Three offshore decommissioning options, i.e. Total Removal for Onshore Disposal, Total Removal for Rig-to-Reef, and Leave-in-Situ for Mariculture are examined closely. A qualitative evaluation, which involves comparing the total expected cost of each option against its total expected benefits, is conducted in view of decommissioning drivers, i.e. Safety, Environment, Technical, Cost, and Social Impact to other sea user and community. The evaluation of the expected cost of each decommissioning options is presented. The first two options are subjected to high cost activities e.g. platform removal; mobilization and demobilization of derrick barge; and material disposal onshore or reefing site. The Leave-in-Situ for Mariculture option, on the other hand, is not exposed to those activities as it leaves the retired platform on its existing location and turns the structure into the site for offshore cage system fish farming. This is significant because in the Gross Split PSC scheme, PHE ONWJ is expected to be more prudent and focus on cost efficiency. The social impact of the Mariculture method is potentially important considering the rapid growing of global per capita fish consumption and the fact that there are no offshore cage systems fish farming using retired offshore platform in Indonesian waters or even Southeast area yet. The suitability of the proposed mariculture site of Offshore North West Java waters is further evaluated against the guidelines from the Food and Agriculture Organization of the United Nations (FAO). The Mariculture method can be not only the most cost efficient solution for offshore platform decommissioning, but also providing alternative technique to increase marine fish production.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126055483","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":"Assessing the Social and Economic Impacts of Oilfield Closure and Decommissioning","authors":"D. Snashall","doi":"10.2118/193943-MS","DOIUrl":"https://doi.org/10.2118/193943-MS","url":null,"abstract":"\u0000 In recent years the mining industry has become intensely focused on managing closure impacts; environmental, social and economic. The industry has developed a range of techniques for this work. The oil and gas industry, however, has tended to focus on the the cost and environmental impacts of decommissioning with less consideration of social and economic issues.\u0000 The objective of this paper is to review the nature of social and economic impacts resulting from the closure of operational oilfields that come with decommissioning. It will investigate the application of closure impact assessment techniques from mining to the oil and gas industry.\u0000 The paper draws on project experience and review the literature to identify the likely range of social and economic impacts from oilfield closures, and the recommended processes for managing these impacts. A comparison will be undertaken with guidance from the mining industry. The range and nature of impacts will be compared to the mining industry and the application of mining industry impact assessment tools will be assessed for use of oilfield closure projects.\u0000 The paper identifies an appropriate range of techniques of closure impact assessment for the oil industry. It draws on techniques from the mining industry and customises them for application to the oil industry.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122575943","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":"Policy and Institution of Offshore Platform Decommissioning in Indonesia Oil and Gas Upstream Industry to Improve the Performance of Navigational Safety and State-Owned Asset Management","authors":"Sari Amelia, Y. Latief, N. Zawawi, A. J. Santos","doi":"10.2118/193979-MS","DOIUrl":"https://doi.org/10.2118/193979-MS","url":null,"abstract":"\u0000 The development of offshore upstream oil and gas industry in Indonesia was established in 1971 through the discovery of Arjuna Field in Nothern Java Sea by Atlantic Richfield Indonesia, Inc. (ARII). In 2017, 637 offshore platforms are installed in Indonesian water. Of these, 601 platforms are active and 36 of them are not. Furthermore, 17 of ready to be decommissioned platforms are now in write-off process. A research is conducted to study the policy and institution of offshore platform decommissioning with objective to improve the performance of navigational safety and state-owned asset management. Data of accidents in offshore installations showed some accidents between ship and production facility. These number of accidents in the water region is the key performance indicator (KPI) of authorized institution in Marine Affair which is related to navigational safety. Meanwhile, from state-owned asset management perspective, the success of offshore platform decommissioning will broaden the spectrum of experience of respective institutions, especially in area of Oil and Gas Asset Management. The study is part of applied research which utilized qualitative and quantitative methods. For pilot study, a stakeholder analysis was conducted to identify the key stakeholders of the offshore platform decommissioning program. Six variables were highlighted as latent variables in offshore platform decommissioning: (1) policy, (2) institution, (3) decommissioning method, (4) financing, (5) performance of navigational safety, and (6) performance of state-owned asset management. A conceptual framework was developed for modelling how each variable linkage to build an interaction model between policy, institution, decommissioning method, and financing to improve the performance of navigational safety and state-owned asset management. Structural Equation Model Partial Least Square (SEM PLS) was adopted for this purpose.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122021704","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":"Planning & Execution of FIELD 1 Subsea Facilities Decommissioning","authors":"Tai Liong Alan Yap","doi":"10.2118/193970-MS","DOIUrl":"https://doi.org/10.2118/193970-MS","url":null,"abstract":"\u0000 The scope of the subsea field abandonment comprises plugging & abandonment (P&A) of subsea well, topside preparation, pipeline flushing and removal of subsea equipments like the wellhead christmas tree, sections of pipeline (expansion spool) and sections of umbilical control line. The remaining pipeline on seabed toward host platform will be left in-situ. These are the scope of the concept selected in DOA, which were further matured in Abandonment Plan.\u0000 Objectives of the project are: Improve safety and eliminate integrity riskEliminate OPEX for Well that has demonstrated no further potential for economical productionFulfil PSC Abandonment Obligation Plan\u0000 The execution of the subsea field abandonment harnessed resources from various specialties ranging from CAT3 to Wells, CAT1 and Subsea, coherently progressing as a single team. A good deal of attention was paid to the technical integrity and long term plan of existing asset, which also played a major role setting the magnitude of work.\u0000 Lacking in experience in abandonment, we leveraged on the existing industrial resources and expertise where required, in order to realise a cost-effective execution. The activities were planned in accordance with applicable Production Sharing Contract, PETRONAS Procedures and Guidelines for Upstream Activities (PPGUA) 3.0, Shell Internal Guidelines, and the applicable local and international regulations.\u0000 Overall execution strategy and schedule was considerably influenced by pipeline flushing method and schedule of existing resources, which could be fairly aggressive, in contrary to popular belief that abandonment projects are not schedule driven.\u0000 Bundling of activities is the key to cost-effective execution, though the challenge escalates as we move from bundling of activities, to bundling of campaigns.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127642747","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":"Different Routes - Same Destination: Planning Processes for Decommissioning in South East Asia","authors":"Steve Laister, Sylvia Jagerroos","doi":"10.2118/193946-MS","DOIUrl":"https://doi.org/10.2118/193946-MS","url":null,"abstract":"\u0000 'As decommissioning has risen up the agenda for both Governments and oil and gas operators, the countries of Southeast Asia have adopted differing frameworks for the planning, permitting and execution of the decommissioning process. This paper presents a review of the frameworks adopted by a number of the key oil and gas countries in the region by reference to the legislative and guidance instruments to which they are signatories or have introduced, and the authors’ experience of working with Governments and oil and gas operators. The paper illustrates that countries such as Thailand, Malaysia and Brunei Darussalam are actively developing legislative and guidance frameworks with broadly common requirements, and identifies that opportunities exist for increased information sharing and capability building within and between countries in the region, to further encourage consistent, cost and time efficient outcomes.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131642770","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":"NEBA Application for Offshore Subsea Pipeline Decommissioning","authors":"Jariya Kankamnerd, Surasak Chonchirdsin, Chatawut Chanvanichskul, Pheerasak Phanichtriphop","doi":"10.2118/193985-MS","DOIUrl":"https://doi.org/10.2118/193985-MS","url":null,"abstract":"\u0000 There is a demonstrated need for both technical and non-technical factors of the decommissioning industry which are the criteria of decision making in decommissioning project development. In Gulf of Thailand, there are huge numbers and volumes of offshore subsea pipelines expected to be decommissioned when the concession is end. The evaluation of pipeline decommissioning technique to determine the optimum final project configuration to reflect the long-term environmental impact or benefit of various decommissioning techniques is required. Therefore, the innovative model \"Net Environmental Benefit Analysis (NEBA)\" was applied to determine the environmentally project alternative. NEBA model provides a relative ranking on the expected environmental values of project alternatives which based on outcomes of a consensus workshop among stakeholders and regulators which was arranged to obtain final agreement on environmental values identification, weighting and scoring of project.\u0000 The semi-quantitative NEBA model used here is structured around the determination of the functional elements of the NEBA: the service impact level, recovery period, post recovery services value, and post-recovery period. This study focus of NEBA is to determine the net benfit for seven different decommissioning techniques for offshore subsea pipelines based on a specific ecological services of the project producing an impact. For the purpose of this study, ten ecological services were evaluated for each decommssioning technique (i.e habitat value, production value and behavioral responses). The mathematics in this model is developed around the service metric gains and losses and considered to be semi-quantitative since the criterion rankings and relatively with respect to baseline are based on the agreement of the workshop.\u0000 Finally, the quantitative NEBA score in the context of the clear environmental benefit and impact in each technique was provided to a decommssioning project development decision maker to make defensible decisions to choose the most appropriate cost effective decommssioning technique to company.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122054648","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":"Plug and Abandonment Procedures for Onshore Wells and the Utilization of Reserved Abandonment and Site Restoration ASR Funds","authors":"A. E. Prasetya, Rakhmahwidiati Rakhmahwidiati, Ronald Daniel Pangihutan Hutabarat","doi":"10.2118/193956-ms","DOIUrl":"https://doi.org/10.2118/193956-ms","url":null,"abstract":"\u0000 Provide an overview of the procedures for abandoning onshore wells, backgrounds and technical requirements as a reference. Provide an overview of the utilization of reserved abandonment and site restoration funds to finance the abandonment of the wells.\u0000 Plugging and abandoning the well is done when it has not more potential on productivity, has a well integrity problem, and is at risk of theft and the environment. Procedures undertaken to obtain approval for the closure of the well. The technical review of abandoning of the well refers to recognized national and international standards. Discuss some possible innovations to obtain more effective way in troubleshooting or to replace some procedures that are not possible to be followed. Reserved ASR funds disbursement procedures to pay for work. Challenges to speed up the process of disbursement of funds.\u0000 Following standard procedures requires considerable attention and impacts on costs to be incurred. Disbursing ASR funds that have been reserved to pay for the work is not as easy as the established procedure. Several suggestions for improvements are made to speed work approval and disbursement of funds.\u0000 Well abandonment procedures have been standardized, but submission procedures and ASR disbursement submissions are necessary for every operator to know. This paper provides an important guide for operators to submit P&A proposals and fund disbursements.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127596028","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":"Deepwater Decommissioning: What O&G Industry Could Learn from the Pioneer Subsea Temporary Well Suspension Project in Mauritania.","authors":"Xin Yi Koong, Khalil Mohamed Mbarek, W. Liew, Shahira Emie Lyana Mustaffa, M. H. A. Razak","doi":"10.2118/193972-MS","DOIUrl":"https://doi.org/10.2118/193972-MS","url":null,"abstract":"\u0000 Fifteen (15) subsea wells in Mauritania, consisting of 9 oil producer wells, 5 water injector wells and 1 gas injection well, were temporary suspended in preparation for plug and abandonment at a later phase. This paper describes the overview, challenges faced and lessons learnt captured during the planning and execution of pioneer deepwater decommissioning project, particularly on the subsea temporary well suspension (TWS) campaign in Mauritania.\u0000 Lack of wells production history became one of the biggest challenge during the planning for the temporary well suspension and Plug and abandonment (P&A) campaign. The remoteness of the field locations contributed to logistics difficulties. Sourcing of H2S rated equipment and drillpipe riser, integration between Xmas tree and Intervention riser system due to incompatible connector took long lead time. Barrier management was a key consideration during the planning phase for known well integrity issues, and potential lack of barrier establishment that could be encountered during operations. The difference in water depth also impacted on rig selection.\u0000 Problems encountered during the execution of the temporary well suspension campaign included H2S, annulus & tubing communication problem, high annulus pressure, non-functioning tubing retrievable surface-controlled safety valve, unexpected waxy sludge in well, blocked perforations, hydrate, brine incompatibility, difficulty in accessing well due to over-trawlable structure and dependency on FPSO for pressure monitoring prior to tree cap removal due to barrier establishment problems. The temporary well suspension campaign was executed with abandonment in mind.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126976928","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":"Abrasive Waterjet Cutting Simulation Using Coupled SPH-FEA Method","authors":"M. Thiyahuddin, Nian Wei Tan, M. Dindi, M. I. M. Ros, M. Z. Sulaiman, M. R. A. Rahman","doi":"10.2118/193949-MS","DOIUrl":"https://doi.org/10.2118/193949-MS","url":null,"abstract":"\u0000 A couple SPH-FEA modelling technique is investigated to determine the suitability of the mentioned technique to model offshore cutting operation of Abrasive Water-jet (AWJ) cutting. For model validation, results are compared to analysis available in literature on abrasive water-jet machining. An AWJ cutting a ductile metal sample with certain thickness and property is modeled and simulated to investigate the impact response and parameters that influence, including impact speeds. To overcome the difficulties of fluid—solid interaction and extra-large deformation problem using finite element method (FEM), the SPH-coupled FEA modeling for abrasive waterjet cutting simulation is presented, in which the abrasive waterjet is modeled by SPH particles and the target material is modeled by Finite Element. Validation is achieved by comparing the model against numerical result available in literature. The coupled SPH-FEA model is compared against previously published results and validated. Then, studies is conducted to determine the erosion rate effect due to change in abrasive types and different flow rates. The depth of penetrations and erosion rate is extracted for analysis. It can be seen that the generated SPH-FEA method is able to simulate the condition of AWJ cutting of offshore steel structure material up to 250 MPa. The fluid-structure interaction in AWJ cutting where the erosion-cutting of steel target material is highly non-linear was modelled by full coupled SPH/FEA. This research demonstrates that the approach can be extended to full-scale AWJ-steel structure cutting simulation through appropriate management of SPH/FEA resources. With a validated model, researchers will be able to manipulate the variables in AWJ to study the efficacy of cutting optimization in offshore decommissioning operations. The novelty in this paper is that the coupled SPH-FEA technique to model Abrasive Water Jetting is used to model cutting of offshore structures. This validated coupled SPH-FEA modelling technique will enable engineers to design new cutting tools that can improve efficiency and efficacy of next generation offshore cutting tools.","PeriodicalId":437819,"journal":{"name":"Day 1 Mon, December 03, 2018","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128572674","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}