复合线性胶压裂液性能评价与现场应用*

Performance Evaluation and Field Application of Composite Linear Gel Fracturing Fluid

万青山 聂小斌 陈丽艳 李婷婷 扎克坚

WAN Qingshan NIE Xiaobin CHEN Liyan LI Tingting ZHA Kejian

为提升线性胶压裂液的耐温耐剪切性能，用有机硼/锆复合交联剂（FHBZ-1）与部分水解聚丙烯酰胺 （HPAM）及多羟基醇制备了LG-2复合线形胶压裂液。评价了LG-2线性胶压裂液体系的交联性能、耐温耐剪切 性能及破胶性能，并在西部页岩气井进行了现场应用。结果表明，LG-2线性胶压裂液的交联性能较好，耐温耐 剪切性能好于HPAM/有机锆单一凝胶体系。在110 ℃、170 s-1下，LG-2线性胶压裂液恒速剪切120 min的最终黏 度为103 mPa·s，而单一HPAM/有机锆凝胶仅为48 mPa·s；在130 ℃、170 s-1 恒速剪切速率下，LG-2线性胶压裂液 的峰值黏度为448 mPa·s。LG-2线性胶压裂液在60 ℃及90 ℃时的破胶液黏度小，残渣量低。页岩气井现场试 验结果表明LG-2线性胶压裂液体系具有优良的造缝携砂性能。

In order to improve the temperature and shear resistance of linear gel fracturing fluid，the composite linear fracturing fluid LG-2 was prepared by using organic boron/zirconium composite crosslinking agent（FHBZ-1），partially hydrolyzed polyacrylamide （HPAM） and polyhydroxy alcohol. The crosslinking performance，temperature and shear resistance and gel breaking performance of LG-2 linear gel fracturing fluid system were evaluated. The field application was carried out on a shale gas well in the West. The results showed that LG-2 linear gel fracturing fluid had better crosslinking performance，temperature and shear resistance than HPAM/organic zirconium single gel system. The final viscosity of LG-2 linear gel fracturing fluid was 103 mPa·s after constant shearing 120 min at 110 ℃ and 170 s-1，while that of HPAM/ organic zirconium gel was 48 mPa·s. The peak viscosity of LG-2 linear gel fracturing fluid was 448 mPa·s after constant shearing at 130 ℃ and 170 s-1 . LG-2 linear gel fracturing fluid had low viscosity and residue after gel breaking at 60 ℃ and 90 ℃. The field test results of shale gas well showed that LG-2 linear gel fracturing fluid system had excellent performance of fracture making and sand carrying.

10.19346/j.cnki.1000-4092.2021.04.006