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首页> 外文会议>Society of Petroleum Engineers Asia Pacific Oil Gas Conference and Exhibition >Drilling and Completion Challenges and Remedies of CO2 Injected Wells with Emphasis to Mitigate Well Integrity Issues
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Drilling and Completion Challenges and Remedies of CO2 Injected Wells with Emphasis to Mitigate Well Integrity Issues

机译：CO2的钻井和完善挑战和补救措施注入了井，重点是减轻良好的诚信问题

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CO2 emission is generally accepted to be one of the prime causes of global warming and climate change issues. In order to combat this global warming by reducing CO2 emissions, there are numerous pilot projects developed worldwide, where injection of CO2 for sequestration/storage, and Enhanced Oil/Gas Recovery (EOR/EGR) have been ongoing for many years. The well design and completion consideration of such CO2 injected wells, especially pertaining to well integrity, selection of downhole completion equipments, design of pressure containment for high pressure and highly corrosive environment, differs in many ways compared to typical injection wells in the oil field or natural gas storage projects. There are various well integrity failures, which are reported in the literature during drilling and completion of such wells either for EOR or CO2 sequestration projects. The monitoring of CO2 migration within the wells with time is also essential. In this study, the principle mechanisms involving well integrity issues including caprock and cementing integrity in CO2 injected wells are investigated at various operating conditions, based on comprehensive review of various field cases as published in the literature. The critical factors associated with well design failures, pressure containment, corrosion issues, tubing leakage, cementing problems, and selection of downhole equipments for well completion etc are identified. Based on the study, precise screening criteria are developed that enables the design and completion of CO2 injected wells for EOR and CO2 sequestration; thereby minimizing the chance of integrity failures. Results for different conditions will be presented and discussed to provide guide lines for mitigating the numbers of theses challenges with an emphasis to the successful design and completion of such wells. The key factors concerning monitoring of CO2 migration with time will be discussed.
机译：二氧化碳排放量被普遍接受的是对全球变暖和气候变化问题的主要根源之一。为了减少二氧化碳的排放量，以打击这一全球变暖，全球有无数的开发试点项目，其中注入CO2封存/存储，并提高石油/天然气回收（EOR / EGR）已经持续了很多年。该井设计和完成考虑到这样的CO 2的注入井，特别是有关良好的完整性，井下完井设备的选择，压力容器用于高压和强腐蚀环境的设计，在很多方面不同相比，在油田的典型注入井或天然气储存项目。有各种不同的井的完整性故障，这是用于EOR或封存二氧化碳项目钻井和这种井完成期间或者在文献中报道。 CO2迁移的小井中随时间的监控也是必不可少的。在这项研究中，涉及油井完整性问题，包括盖层和二氧化碳固井诚信原则的机制注入井在各种工作条件进行调查的基础上，为发表在文学的各种现场情况全面审查。具有良好设计的故障，压力容器，腐蚀的问题，管道泄漏，固井的问题，以及用于完井等井下设备的选择相关联的关键因素被识别。根据研究，精确的筛选标准的开发，使CO2的设计和完成注入井和提高采收率二氧化碳封存;从而最大限度地减少的完整性失败的机会。结果在不同的条件将介绍和讨论的用于与强调这些井的成功设计和完成减轻的论文挑战数提供引导线。关于与实时监控CO2迁移的关键因素进行讨论。

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