College of Chemical and Environmental Engineering,Yangtze University
玛湖1井区百口泉组为典型的低孔低渗致密油储层，当前的主要增产手段为大规模水力压裂，面临着3大难题：压裂液减阻效果差、对储层伤害大；水资源匮乏，油田污水处理困难；缝间剩余油分布，采收率有待提高。文中合成了一种低伤害JHFR减阻剂，构筑了JH低伤害滑溜水压裂液，主要组成为0.1%JHFR减阻剂+0.2%JHFD多功能添加剂，具有速溶（溶解时间15 s）、高效减阻（减阻率76.9%）、低油水界面张力（0.89 mN/m）、防膨效果好（CST比值0.92）等特点，且体系与玛湖1井区的地层水和返排液配伍性良好、对岩心渗透率损害程度低，适用于玛湖1井区的大规模连续压裂施工。
Baikouquan formation in Mahu 1# well area is a typical tight oil reservoir with low porosity and low permeability, which large-scale hydraulic fracturing is need to increase production. However, there are three major problems. First, the fracturing fluid has poor drag reduction effect and is harmful to the reservoir. Second, water resources are scarce and oil field sewage treatment is difficult. Third, the recovery rate needs to be improved because of the distribution of residual oil between the joints. So, the JHFR drag reduction agent was synthesized which is low-damage. And then, JH slick water fracturing fluid with low damage was constructed. JH mainly composed of 0.1% JHFR drag reduction agent and 0.2% JHFR multifunctional additives. The fluid is characterized by instant dissolution (15 s), high efficiency drag reduction (76.9%), low oil-water interfacial tension (0.89 mN/m), and good anti-swelling effect (CST ratio 0.92)., and other characteristic. The system has good compatibility with formation water and backflow fluid in the Mahu 1# well area, and the damage degree to core permeability is low. So, it is suitable for large-scale continuous fracturing in the Mahu 1# well area.