井筒完整性监测方法在CCUS中的应用探讨  

Application of well integrity monitoring in CCUS

作　　者：张晶宇 刘平 肖波 李桂山 王建仁 王璇 ZHANG Jingyu;LIU Ping;XIAO Bo;LI Guishan;WANG Jianren;WANG Xuan(Changqing Branch,China National Logging Corporation,Xi′an,Shaanxi 710200,China;No.5 Oil Production Plant,PetroChina Changqing Oilfield Company,Xi′an,Shaanxi 710201,China)

机构地区：[1]中国石油集团测井有限公司长庆分公司,陕西西安710200 [2]中国石油长庆油田分公司第五采油厂,陕西西安710201

出　　处：《油气井测试》2023年第6期55-59,共5页Well Testing

基　　金：中国石油集团测井有限公司科研项目“长庆油田CCUS测试技术研究及应用”(FD60122K109)。

摘　　要：实施碳捕集、利用和封存(CCUS)技术中,开展补能提效和地下埋存都需要通过井筒进行注入作业,管柱或固井水泥环失效导致CO_(2)窜漏,会极大影响动态埋存率和驱油效率。从目前多种井下油套管窜漏点测井方法入手,采用氧活化、多参数、噪声测井等综合测井方式,监测注CO_(2)井的可疑窜漏点,结合实际测井资料及应用效果形成一套准确、高效、可行的综合找漏测井方法。对CO_(2)封存井筒完整性前期测井评价到中后期泄露监测进行了技术适应性分析,提出了静态先导评估与动态时移监测阶段下的配套方法。经Y27井现场应用,监测出该井1700 m处为可疑漏点,通过对该点实施化学堵漏后恢复注气。该方法为油气田CCUS项目开展封存监测提供了思路。For carbon capture,utilization and storage(CCUS),both energy replenishment and underground storage require wellbore injection,during which the failure of drilling string or cement sheath may induce CO_(2)leakage to greatly impact the dynamic storage rate and oil displacement efficiency.Based on the principles of existing downhole tubing/casing leakage logging techniques,oxygen activation,multiple parameters and noise logging were integrated to detect the suspected leakage points in wells with CO_(2)injection.Coupling with actual logging data and application results,an accurate,efficient and feasible integrated leakage logging technique was developed.Its adaptability to the process from log evaluation in the early stage to leakage monitoring in the mid-late stage with respect to well integrity in CO_(2)storage environment was analyzed,and then the supporting procedures in the stage of static pilot evaluation and dynamic time-lapse monitoring were proposed.Field application in Well Y27 revealed a suspected leakage point at 1700 m,which was plugged chemically before the resumption of CO_(2)injection.The proposed technique provides a reference for storage monitoring in field CCUS projects.

关 键 词：井筒完整性 综合找漏 CO_(2)驱 测井评价 动态监测 CO_(2)封存 CCUS 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]