摘要
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.
作者
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(Research Institute of Experiment and Detection,Xinjiang Oilfield Branch Company,PetroChina,Karamay,Xinjiang 834000,P R of China;Xinjiang Laboratory of Petroleum Reserve in Conglomerate,Karamay,Xinjiang 834000,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2021年第4期603-607,共5页
Oilfield Chemistry
基金
国家科技重大专项“化学驱提高采收率技术”(项目编号2016ZX05010-004)。
关键词
页岩气
水力压裂
交联剂
线性胶压裂液
shale gas
hydraulic fracturing
crosslinking agent
linear gel fracturing fluid
