川西高温压裂液室内研究

Laboratory research of high temperature fracturing fluid in west Sichuan

杨兵 黄贵存 李尚贵

YANG Bing HUANG Guichun LI Shanggui

中国石化西南油气分公司工程技术研究院，四川德阳　618000

Engineering Technology Research Institute of Sinopec Southwest Petroleum Branch, Deyang 618000, China

针对川西压裂液体系耐温性能差、日益不适应深层储层改造要求的难题，从压裂液耐温性能影响因素分析出发，合成了耐温高、交联时间可调的有机硼锆复合交联剂WD-51D，并通过引入温度稳定剂YA-10研制成耐温能力达140 ℃的高温压裂液体系。实验表明该压裂液体系耐温耐剪切能力强（140 ℃、170 s-1连续剪切120 min黏度保持在100 mPa?s以上），降滤失性能好（滤失系数7.49×10-4 m/min0.5），对地层伤害率低（27.99%），满足川西深层储层改造的要求，并在大邑2井取得了成功应用。

Poor temperature resistance of west Sichuan fracturing fluid at present can’t meet the need of deep reservoir reconstruction. Starting from analyzing factors affecting temperature resistance of fracturing fluid, organic borate-zirconate compound cross-linker WD-51D was synthesized with high temperature resistance and adjustable cross-linking time. In addition, this paper developed a high temperature (140 ℃) fracturing fluid system by the introduction of temperature stabilizer YA-10. Experiments indicate that this fracturing fluid possesses the advantage of powerful temperature/shear (T/S) resistance (viscosity maintains above 100 mPa?s at 140 ℃ and 170 s-1 continuous shearing for 120 min), good filtrate reduction property (filtration coefficient of 7.49×10-4 m/min0.5), low formation damage ( 27.99%) and so on. This fracturing fluid can meet the requirement of deep reservoir reconstruction in west Sichuan, and has successfully applied in DaYi 2 well.