深层页岩气储层耐温抗盐型滑溜水压裂液体系研究  

Study on High-temperature Resistance Salt-resistance Slickwater Fracturing Fluid System for Deep Shale Gas Reservoirs

作　　者：问晓勇 赵倩云[1,2] 叶亮[1,2] 刘利峰[1,2] 张燕明[1,2] 王文雄[1,2] 闫健[3] WEN Xiaoyong;ZHAO Qianyun;YE Liang;LIU Lifeng;ZHANG Yanming;WANG Wenxiong;YAN Jian(National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi’an,Shaanxi 710021,China;Oil and Gas Technology Research Institute,PetroChina Changqing Oilfield Company,Xi’an,Shaanxi 710018,China;College of Petroleum Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,China)

机构地区：[1]低渗透油气田勘探开发国家工程实验室,陕西西安710021 [2]中国石油长庆油田分公司油气工艺研究院,陕西西安710018 [3]西安石油大学石油工程学院,陕西西安710065

出　　处：《西安石油大学学报（自然科学版）》2023年第4期104-111,共8页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”任务3:“大型低渗透致密气田规模效益开发技术”(1601-1-1);中国石油天然气集团有限公司科学研究与技术开发项目“集团公司侧钻井技术示范与推广”(2019D-4209)。

摘　　要：为满足深层页岩气储层压裂施工对压裂液性能的要求,以丙烯酰胺、刚性基团阳离子单体和N-乙烯吡咯烷酮为原料复配了一种高效耐温抗盐型降阻剂GHR-1,并结合助排剂和黏土稳定剂,形成了一套适合深层页岩气储层的耐温抗盐型滑溜水压裂液体系,对其综合性能进行了评价。结果表明:滑溜水体系的防膨性能、表面张力、pH值、运动黏度、残渣含量以及与地层水的配伍性等基本指标均满足行业标准要求。体系的耐温抗盐性能较好,在最高温度为140℃或者矿化度达到204.8 g/L时,滑溜水的减阻率仍能达到70%以上。体系对目标区块页岩储层岩心的基质渗透率伤害率低于10%,具有较好的储层保护效果。耐温抗盐型滑溜水压裂液体系在NX-1井成功进行了现场应用,施工过程中滑溜水压裂液性能比较稳定,现场减阻效果较好,测试产气量达到了42.35×10^(4)m^(3)/d,压裂增产效果较好。In order to meet the requirements of fracturing fluid performance for deep shale gas reservoir,a high-efficiency temperature-resistant and salt-resistant drag reducer GHR-1 is compounded with acrylamide,rigid group cationic monomer and N-vinylpyrrolidone as raw materials.Together with cleanup additive and clay stabilizer,a temperature-resistant and salt-resistant slickwater fracturing fluid system suitable for deep shale gas reservoir is formed,and its comprehensive performance is evaluated.The results show that the anti-swelling property,surface tension,pH value,kinematic viscosity,residue content and compatibility of the slickwater fracturing fluid system with formation water meet the requirements of the industry standards.The system has good temperature resistance and salt resistance.When the maximum temperature is 140℃or the salinity reaches 204.8 g/L,the drag reduction rate of slippery water can still reach more than 70%.The matrix permeability damage rate of the system to the shale reservoir core in the target block is less than 10%,which has a good reservoir protection effect.The temperature-resistant and salt-resistant slickwater fracturing fluid system has been successfully applied in well NX-1.During the construction,the performance of the slickwater fracturing fluid is stable,and its field drag reduction effect is good.The tested gas production of the well has reached 42.35×10^(4)m^(3)/d,which shows that the system has a good fracturing stimulation effect.

关 键 词：滑溜水压裂液 降阻剂 减阻率 耐温抗盐 深层页岩气 

分 类 号：TE377[石油与天然气工程—油气田开发工程]