低摩阻高比重耐高温压裂液的制备与性能评价

Preparation and Performance Evaluation of Fracturing Fluid with Low Friction，High Density and High Temperature Resistance

侯 帆 仇宇楠 张 雄 王 壮 方裕燕 姚二冬 安 娜 周福建

HOU Fan QIU Yunan ZHANG Xiong WANG Zhuang FANG Yuyan YAO Erdong AN Na ZHOU Fujian

针对塔里木盆地顺北区块储层埋藏深（8600 m）、温度高（180℃）及岩性致密的特点，用稠化剂 GX-100、自制的有机锆交联剂 WQ-60和加重剂 KCl制得低摩阻高比重耐高温压裂液体系，评价了该体系的耐温抗剪切性、减阻性及破胶性能，并在塔里木盆地顺北区块进行了现场应用。结果表明，配方为 0.5% GX-100+0.65% WQ-60+2.5% pH调节剂+20% KCl的压裂液可加重至密度 1.1 g/cm3。压裂液耐温抗剪切性能良好，在 180℃、170 s-1下剪切 90 min的黏度大于 50 mPa·s，降阻率超过 60%，且具有低残渣、破胶水化彻底等优点，满足现场压裂施工要求。图 3参22

According to the characteristics of reservoir burial depth （8600 m），high temperature （180℃ ） and lithologic compactness in Shunbei block of Tarim Basin，a fracturing fluid system with low friction，high density and high temperature resistance was prepared by using thickener GX-100，self-made organic zirconium crosslinker WQ-60 and weighting agent KCl. The temperature and shear resistance，drag reduction and gel breaking properties of the system were evaluated. Field application was carried out in Shunbei block of Tarim Basin. The results showed that the fracturing fluid system composed of 0.5% GX-100，0.65% WQ-60，2.5% pH modifier and 20% weighting agent KCl could be aggravated to density of 1.1 g/cm3. The fracturing fluid had good temperature resistance and shear resistance. The viscosity of fracturing fluid was higher than 50 mPa·s after shearing 90 min at 180℃ and 170 s-1. The drag reduction efficiency of the solution was greater than 60%. In addition，the gel broke completely and the residue quantity was low，which satisfied the requirement of fracturing construction.