摘要
CO_(2)地质利用与封存的实施过程中气体泄漏与逃逸问题不仅影响工程效果,还会威胁人员和环境安全。井筒是CO_(2)泄漏的高风险途径,井筒完整性对保障CO_(2)长期稳定封存意义重大。针对CO_(2)地质封存中井筒密封失效可能引发的气体泄漏问题,在总结国内外相关研究成果的基础上,分析了CO_(2)注入和封存条件下井筒完整性失效机理与影响因素,讨论了不同封存地质体条件下可能出现的井筒完整性问题。基于国内CO_(2)地质封存技术现状,提出了井筒完整性技术对策及建议:优化设计水泥浆体系与施工参数,优选封存地层与管柱材料,加强CO_(2)泄漏监测技术研究,将预防措施与应对手段相结合,形成完整的技术体系。
The gas leakage and escape during the implementation of CO_(2) geological utilization and storage will affect the engineering effect and threaten the safety of personnel and the environment.Wellbore is a high-risk pathway for CO_(2) leakage,and wellbore integrity is of great significance to ensure the long-term stability of CO_(2) storage.To address the issue of gas leakage caused by wellbore sealing failure in CO_(2) geological storage,the failure mechanism and influencing factors of wellbore integrity under CO_(2) injection and storage conditions were analyzed based on the summary of relevant research results in China and abroad,and the wellbore integrity problems that may occur under different geological storage conditions were discussed.According to the current status of Chinese CO_(2) geological storage technology,countermeasures and suggestions for wellbore integrity were given,including optimizing the design of the cement slurry system and construction parameters,selecting storage formation and pipe string materials,strengthening the research on CO_(2) leakage monitoring technologies,combining preventive measures with response measures,and developing a complete technical system.
作者
郭少坤
李军
连威
曹伟
GUO Shaokun;LI Jun;LIAN Wei;CAO Wei(China University of Petroleum(Beijing),Beijing,102249,China;College of Petroleum,China University of Petroleum-Beijing at Karamay,Karamay,Xinjiang,834099,China;Sichuan Baoshihua Xinsheng Oil&Gas Operation Service Co.,Ltd.,Chengdu,Sichuan,610055,China)
出处
《石油钻探技术》
北大核心
2025年第1期144-154,共11页
Petroleum Drilling Techniques
基金
中国石油科技创新基金研究项目“二氧化碳利用与封存井筒完整性失效评价及控制方法”(编号:2022DQ02-0605)
国家自然科学基金青年科学基金项目“页岩气井多级压裂诱发断层滑移量化计算模型与套管变形控制方法研究”(编号:52204018)
国家自然科学基金联合基金项目“金属封隔层井下原位生成机理与控制方法研究”(编号:U23B2081)
新疆维吾尔自治区“一事一议”引进战略人才项目(编号:XQZX20240054)联合资助。
关键词
CCUS
二氧化碳
井筒完整性
地质封存
泄漏
carbon capture,utilization and storage
carbon dioxide
wellbore integrity
geological storage
leakage
