低摩阻超高温压裂液研究及应用  

Study and application of low-friction high-temperature fracturing fluid

作　　者：肖兵[1] 范明福 王延平[1] 郭粉娟 赵莹[1] 党昊 XIAO Bing;FAN Mingfu;WANG Yanping;GUO Fen juan;ZHAO Ying;DANG Hao(Downhole Special Service Company,Zhongyuan Petroleum Engineering Corporation Limited,SINOPEC,Puyang 457164,China)

机构地区：[1]中国石化中原石油工程有限公司井下特种作业公司,河南濮阳457164

出　　处：《断块油气田》2018年第4期533-536,共4页Fault-Block Oil & Gas Field

基　　金：中国石化石油工程技术服务有限公司项目"高温压裂液体系研究及应用"(SG16-32K)

摘　　要：针对常规压裂液耐温能力不足、交联时间短、施工摩阻高等问题,通过研制强延缓交联剂、温度稳定剂,优选稠化剂、p H调节剂、黏土稳定剂,开发了一套低摩阻超高温压裂液体系,形成3个高温(160,180,195℃)配方,并进行了流变性能、降阻性能、破胶性能及伤害性能的分析评价。结果表明:该体系可在不同温度点下交联,交联时间可控,并具有良好的抗剪切能力,195℃,170 s-1下剪切95 min后,黏度仍保持在50 m Pa·s以上;破胶液残渣质量浓度为386 mg/L,对支撑剂充填层导流能力的伤害率为7.85%,滤液对岩心渗透率的损害率为19.20%,降阻率为55.34%,完全能满足超深高温储层大规模压裂的要求。此体系成功应用于塔河油田TKX井6 576.07~6 656.00 m井段,同等排量下的降阻效果明显优于常规压裂液。Aiming at the problems of insufficient temperature resistance, short cross-linking time and high frictional construction resistance of conventional fracturing fluid, an ultra-high temperature fracturing fluid system with low concentration and low frictional resistance was developed through the development of strongly-delayed cross-linking agent, temperature stabilizer, thickening agent optimization, ph regulator and clay stabilizer. Three high temperature formulations for 160, 180 and 195℃ were formed, and the rheological property, frictional resistance, gel breaking property and damage property of the system were analyzed and evaluated. The results show that： this system can be cross-linked at varied temperatures. Cross-linking time can be controlled and anti-shear ability is favorable. Viscosity can be still above 50 mPa·s with the residue content of the cracked liquid at 386 mg/L, the damage rate of the supporting fracture 7.85%, the core permeability damage rate of filtrate 19.20%, the resistance-reducing rate 55.34% after 95 rain shear at 195℃, 170 s 1^-1, meeting the requirement of super-deep high-temperature reservoir fracturing. This system has been applied successfully to TKX Well 6,576.07 6,656.00 m of Tahe Oilfield. The resistance reduction effect of this fracturing fluid system is better than conventional fracturing fluid system at the same displacement.

关 键 词：超高温压裂液 交联剂 温度稳定剂 降阻 低伤害 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]