低密度有机-无机互穿网络堵漏体系研究  

Study on low-density organic-inorganic interpenetrating network plugging system

作　　者：郭岳松 黄维安[1] 朱立鑫 王涛[2] 李宏港 杨雄 GUO Yuesong;HUANG Weian;ZHU Lixin;WANG Tao;LI Honggang;YANG Xiong(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Petro China Tarim Oilfield Company,Korla,Xinjiang 841000,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油塔里木油田公司,新疆库尔勒841000

出　　处：《中国科技论文》2024年第6期629-635,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(51974351,51991361)。

摘　　要：采用常规可固化堵漏剂解决低压地层裂缝性漏失时会产生密度过大或承压不足的技术难题,因此研究低密度高抗压的堵漏体系具有重要意义。通过合成聚丙烯酰胺(polyacrylamide,HPAM)交联形成有机网络,并优选水泥材料形成无机网络,构建低密度有机-无机互穿网络堵漏体系;采用模拟水驱实验、X射线衍射、扫描电子显微镜(scanning electron microscope,SEM)、高温高压(high temprature and high pressure,HTHP)堵漏模拟实验、抗压实验等分析了堵漏体系的性能和堵漏机理。结果表明,聚丙烯酰胺交联反应形成的有机网络与水泥水化形成的无机网络通过静电力和范德华力等作用可形成互穿网络体系,体系抗压达6.3 MPa,密度为1.28 g/cm^(3),固化时间实现2~5 h可控,固化前后的酸溶率分别为87.8%和63.4%,堵漏及解堵性良好。In view of the problem of leakage in low-pressure formation fractures,the use of conventional curable plugging agents will cause technical difficulties such as excessive density or insufficient pressure bearing.Therefore,it is of great significance to study a low-density and high-pressure plugging system.By synthesizing polyacrylamide(HPAM)cross-linked to form an organic network,and optimizing cement materials to form an inorganic network,a low-density organic-inorganic interpenetrating network plugging system was constructed.The performance and plugging mechanism of the plugging system were analyzed by simulated water flooding experiments,X-ray diffraction,scanning electron microscopy(SEM),high temperature and high pressure(HTHP)plugging simulation experiments,and pressure resistance experiments.The results show that the organic network formed by the cross-linking reaction of polyacrylamide and the inorganic network formed by cement hydration can form an interpenetrating network system through electrostatic force and van der Waals force.The system has a pressure resistance of 6.3 MPa,a density of 1.28 g/cm^(3),and a controllable curing time of 2-5 h.The acid solubility before and after curing is 87.8%and 63.4%,respectively,and the plugging and unblocking properties are good.

关 键 词：低压地层 裂缝性漏失 聚合物有机网络 水硬性无机凝胶网络 可酸溶解堵 

分 类 号：TE254[石油与天然气工程—油气井工程]