川西区块能量衰竭的老井普遍采用泡排剂,产生大量具有高 COD、高氯离子含量的泡排采出水,导致地层采出水达标处理困难.本文通过开展地层采出水压裂液研制,分析泡排采出水的水质,优选抗盐稠化剂和弱酸性交联剂研制出一套泡排采出水压裂液体系,该体系在65 ℃、170 s-1条件下剪切2 h,最终粘度保持在258 mPa·s以上,能彻底破胶,对储层伤害率小于30 %,抗钙和氯离子浓度在4000 mg/L和100000 mg/L,满足川西储层压裂施工要求.%The extraction of foam is generally used in the old well of the energy failure of the west sichuan, which produces a large number of bubbles with high COD and high chloride ion content leads to the difficulty in the production of the stratum. The development of formation extraction water is carried out fracturing fluid. The bubble extraction of water quality of the soaking water was analyzed, and a series of fluid-fracturing fluid systems were developed with the preparation of the anti-salt thickening agent and the weak acid coupler. Analysis of the bubble extraction of water quality. Develop a set of The bubble extraction of fracturing fluid to optimize the antisalt thickener and weak acid coupler.the system under the condition of 65 ℃, 170 s-1shear 2 h, final viscosity in 258 mPa·s above, can completely gel breaking, the damage to the reservoir rate less than 30 %, the resistance to calcium and chloride ion concentration in 4000 mg/L and 100000 mg/L, satisfies the requirement of western Sichuan reservoir fracturing operation.
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