渤中油田复杂漏失地层复合堵漏技术研究  

Research on Combined Chemical and Physical Leakage Plugging Technology in Complex Leakage Formations in Bozhong Oilfield

作　　者：侯冠中 许杰 陶林 祝国伟 苏建 陈侃 HOU Guanzhong;XU Jie;TAO Lin;ZHU Guowei;SU Jian;CHEN Kan(Engineering Technology Operation Center of Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin 300000,China;Jingzhou Jiahua Technology Co.,Ltd.,Jingzhou Hubei 434099,China)

机构地区：[1]中海石油(中国)有限公司天津分公司工程技术作业中心,天津300000 [2]荆州嘉华科技有限公司,湖北荆州434099

出　　处：《当代化工》2024年第8期1959-1965,共7页Contemporary Chemical Industry

基　　金：中海石油(中国)有限公司项目(项目编号:YXKY-2020-TJ-03);湖北省重点研发计划项目(项目编号:2020BAB072)。

摘　　要：渤中油田深部断层发育,裂缝开口大,易发生速度极大的恶性漏失。针对常规堵漏技术手段堵漏效果不理想、承压能力较弱、出现反复性漏失的问题,在复合堵漏凝胶作用机理研究基础上,结合化学堵漏和物理堵漏的优点,形成了复合堵漏技术,有效解决了恶性漏失封堵难的问题。配套研制的纳米复合凝胶能够在240 min内保持良好的流变性能,黏度控制在35000~43000 mPa·s,240 min的沉降比例低于20%,7 mm的大裂缝封堵后承压能力可达8 MPa,封堵效果良好。The deep faults in Bozhong Oilfield developed,and the fracture openings are large,which belongs to the malignant loss with a very high loss rate.The plugging effect of the conventional plugging technology is not ideal,the pressure bearing capacity is weak,and the problem of repeated leakage occurs.Combining the advantages of chemical plugging and physical plugging,the combination of the two formed a composite plugging technology,which can effectively solve the problem of difficult plugging in malignant leakage formations.Experiments showed that the nanocomposite gel could maintain good rheological properties within 240 min,and the viscosity was controlled between 43000 mPa·s and 35000 mPa·s.The viscosity of the gel itself could also suspend the bridging plugging material very well,and the sedimentation ratio in 240 min was less than 20%.Compared with the single plugging technology,the composite plugging technology could achieve a good plugging effect for large cracks of 7 mm,and the pressure bearing capacity could reach 8 MPa.

关 键 词：恶性漏失 凝胶 复合堵漏技术 流变性能 承压能力 

分 类 号：TE254[石油与天然气工程—油气井工程]