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首页> 外文会议>Offshore Technology Conference;ExxonMobil;FMCTechnologies;Schlumberger >Strategies to Monitor and Mitigate Asphaltene Issues in the Production System of a Gulf of Mexico Deepwater Subsea Development
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Strategies to Monitor and Mitigate Asphaltene Issues in the Production System of a Gulf of Mexico Deepwater Subsea Development

机译：监测和缓解墨西哥湾深水海底开发生产系统中沥青质问题的策略

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An asphaltene threat has been identified in production wells located in a Gulf of Mexico (GOM)rndeepwater field. After production started from different reservoirs and the operating conditions for somernof the wells reached the asphaltene precipitation onset, solid deposits were detected at different points inrnthe production system, which caused production deferrals, disturbed the operating strategy of the field,rnand increased the operational expenditure. To remediate asphaltene deposition in deepwater subsea wells,rna rig-less remediation costs up to $0.12 million (MM); a well intervention that requires a rig costsrnapproximately $20 MM, and a vessel-based pumping remediation costs about $5 MM. These costs do notrninclude the impact of production deferrals.rnA plan was developed to acquire and interpret the required information to properly understand andrnmanage the asphaltene threat. The methodology includes:rn1. Acquisition of suitable downhole reservoir fluid samples for asphaltene and wax studiesrn2. Characterization of the reservoir fluids in the laboratory using the latest asphaltene and waxrntechnologies.rn3. Observation of the effect of chemicals on solids builds up during field trialsrn4. Surveillance of damage near wellbore using Pressure Transient Analysis (PTA) and Multi-RaternTest (MRT)rn5. Real time monitoring of normalized nodal analysis based on frictional pressure losses.rnDuring the characterization of the reservoir fluids, asphaltenes were identified as key risk factor forrnsuccessful field development. The laboratory tests showed the propensity for solids formation andrnconfirmed that the variety of reservoir fluids had an asphaltene deposition envelope that extended fromrnthe reservoir rock to the topsides facilities. Solids collected from pigging returns, surface equipment, andrnfailed downhole equipment confirmed the reservoir fluid’s asphaltene deposition tendency. In some cases,rnfield trials showed that increasing the concentration of asphaltene inhibitor injection resulted in increasedrnbuild-up of organic deposits. PTA and MRT enable the identification of flow restrictions from thernreservoir to the permanent downhole gauge location and real-time monitoring of normalized nodalrnanalysis help to identify where the impediment to flow is located in the production system. rnThis paper presents an integrated approach to evaluate the key elements of asphaltene risk forrndeepwater projects, the strategy to manage the issues during production implementation, and lay out thernaspects to be considered in the mitigation of the negative impact of asphaltene thread in the fieldrndevelopment plan.
机译：在位于墨西哥湾（GOM）深水油田的生产井中发现了沥青质威胁。从不同的储层开始生产后，某些井的工作条件达到了沥青质沉淀开始，在生产系统的不同位置检测到了固体沉积物，从而导致生产延期，扰乱了油田的运营策略，并增加了运营支出。要补救深水海底井中的沥青质沉积，无钻探设备的修复费用高达12万美元（MM）；一口井的作业需要一台钻机，成本约为20毫米MM，而船上抽水的修复成本约为5毫米MM。这些成本不包括生产延期的影响。制定了一项计划，以获取和解释所需信息，以正确理解和管理沥青质威胁。该方法包括：1。采集适用于沥青质和蜡质研究的井下油藏流体样品2。使用最新的沥青质和蜡质技术表征实验室中的储层流体。在田间试验中，观察到化学物质对固体的影响逐渐增强4。使用压力瞬变分析（PTA）和Multi-RaternTest（MRT）rn5对井眼附近的损害进行监视。实时监测基于摩擦压力损失的标准化节点分析。在储层流体表征过程中，沥青质被确定为田间开发失败的关键风险因素。实验室测试表明了固体形成的倾向，并确认各种油藏流体都有一个沥青质沉积包膜，从油藏岩石一直延伸到顶侧设施。从清管器，地面设备和失败的井下设备中收集的固体证实了储层流体的沥青质沉积趋势。在某些情况下，田间试验表明，增加沥青质抑制剂注入的浓度会导致有机沉积物的增加。 PTA和MRT能够确定从储层到永久性井下液位计的流量限制，并实时监控标准化的节点分析，有助于确定生产系统中阻碍流动的位置。本文提出了一种综合方法，用于评估深水项目中沥青质风险的关键要素，在生产实施过程中管理问题的策略，并提出在减轻沥青质线对油田开发计划的负面影响时应考虑的方法。

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