低温转向压裂自降解暂堵颗粒的制备与性能评价研究  

Preparation and performance evaluation of self-degradable temporary plugging particles for low temperature turning fracturing

作　　者：谭家仪 李军亮[1] 汪瀛 孙寿民 刘德基 廖锐全[1] TAN Jia-yi;LI Jun-liang;WANG Ying;SUN Shou-min;LIU De-ji;LIAO Rui-quan(College of Petroleum Engineering,Yangtze University,Wuhan 430000,China;CNPC Tuha Oilfield Engineering Research Institute,Hami 839000,China;No.2 Oil Production Factory,Sinopec Northwest Oil Field Company,Bayingol 841000,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430000 [2]中国石油吐哈工程技术研究院,新疆哈密839000 [3]西北油田分公司采油二厂,新疆巴音郭楞841000

出　　处：《现代化工》2024年第6期113-117,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(62173049)。

摘　　要：为解决低温致密油藏储层转向压裂暂堵剂的降解问题,通过溶液聚合法以丙烯酸、丙烯酰胺、PA-1交联剂和过硫酸铵引发剂制备了适用于低温致密油藏转向压裂的自降解凝胶颗粒暂堵剂,评价了凝胶颗粒的吸水性能和降解性能。同时采用单因素变量法研究了丙烯酰胺、丙烯酸、交联剂、引发剂和矿化度对凝胶颗粒性能的影响,研究了暂堵颗粒的封堵性能。结果表明,凝胶颗粒的吸水倍数为82倍,降解时间为3~6 d,通过调节配方组分可以调节暂堵剂的吸水倍数和降解时间,同时该暂堵剂具有较强的封堵能力,封堵率为99.81%,耐压20.66 MPa。注入水体积为20 PV时,封堵率仍能保持95%以上,暂堵剂可满足低温施工作业要求。In order to solve the degradation problem of temporary plug agent for turning fracturing in low-temperature tight oil reservoir,a self-degrading gel particle temporary plug agent is prepared via solution polymerization method by using acrylic acid,acrylamide,PA-1 crosslinker and ammonium persulfate initiator.The water absorption and degradation properties of the gel particles are evaluated.The effects of acrylamide,acrylic acid,crosslinking agent,initiator and salinity on the properties of the gel particles are studied through using single factor variable method,and the plugging performance is also evaluated.Results show that the gel particles show an 82 times of water absorption ratio,and need 3-6 days to be degraded.The water absorption ratio and degradation time of the temporary plugging agent can be adjusted by changing the composition of the formula.Meanwhile,this temporary plugging agent exhibits a strong plugging ability,with a plugging rate of 99.81%,and a pressure resistance of 20.66 MPa.Its plugging rate remains above 95%as the injected water volume is 20 PV.This temporary plugging agent can meet the requirements of low temperature working conditions.

关 键 词：转向压裂 自降解 暂堵剂 低温 封堵 

分 类 号：TE358[石油与天然气工程—油气田开发工程]