海上老井井筒完整性失效机制及二氧化碳注入可行性研究进展  

Research progress on mechanism of wellbore integrity failure and feasibility of CO_(2)injection for existing wells of offshore CO_(2)geological storage

作　　者：谭永胜 庞照宇 李琦[1,2] 武广瑷 陈博文 TAN Yongsheng;PANG Zhaoyu;LI Qi;WU Guangai;CHEN Bowen(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;CNOOC Research Institute Ltd,Beijing 100028,China)

机构地区：[1]中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉430071 [2]中国科学院大学,北京100049 [3]中海油研究总院有限责任公司,北京100028

出　　处：《环境工程学报》2024年第10期2754-2763,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上项目(42377188);中海油科研项目(KJGG-2022-12-CCUS-0104)。

摘　　要：海上二氧化碳(CO_(2))地质封存潜力大,但封存项目成本高。利用海上油气生产老井作为CO_(2)注入井,具有成本低和降低海上CO_(2)地质封存泄漏风险的特点,因而是一种极具潜力的CO_(2)地质封存方法。本研究梳理了海上老井CO_(2)封存井筒泄漏途径,分析了海上老井CO_(2)封存井筒完整性失效机制以及影响因素,在此基础上,归纳了海上老井CO_(2)封存可行性评价方法,并提出了今后研究的方向。学术界已获得的研究结果表明,海上CO_(2)封存井筒完整性失效机制研究较少,且海上老井CO_(2)封存注入可行性评价方法不完善,亟需开展海上老井CO_(2)封存井筒完整性失效机制及海上老井CO_(2)封存注入可行性评价方法研究,对海上CO_(2)安全高效地质封存具有重要意义。Offshore CO_(2)geological storage has great potential,but the cost is high.Reuse of offshore existing oil and gas production wells for CO_(2)injection wells has the characteristics of low cost and reduced risk of CO_(2)geological storage leakage,making it a highly potential CO_(2)geological storage method.This study summarizes the CO_(2)leakage pathways of the offshore existing wells,analyzes the failure mechanism and influencing factors of the well integrity of CO_(2)storage in offshore existing wells,based on this technology,summarized the feasibility evaluation methods for CO_(2)injection in offshore existing wells,and proposed future research directions.The research results indicated that there are few studies on the failure mechanism for CO_(2)injection in offshore existing wells,and the feasibility evaluation method for CO_(2)injection of offshore existing wells was not perfect.It was urgent to carry out research on the well integrity failure mechanism and the feasibility evaluation method for CO_(2)injection of offshore existing wells,which was of great significance for the safe and efficient offshore CO_(2)geological storage.

关 键 词：海上CO_(2)封存 老井 井筒完整性 失效机制 可行性评价 

分 类 号：X705[环境科学与工程—环境工程]