摘要
压裂返排液液量大,易造成环境污染,其处理难度大,处理成本高。针对此问题,研究利用清洁压裂液返排液配制钻井液的工艺。通过正交实验、极差分析、单因素实验,优选出所配制的钻井液各项性能最佳的相应条件。线性膨胀率实验和泥球实验表明,清洁压裂液返排液配制的钻井液及其上清液都对膨润土的水化膨胀有较强的抑制作用,抑制性优于4%KCl溶液。
According to the problems of large liquid volume,difficult treatment,high processing cost,and environmental pollution on flowback-fluid of clean fracturing,it is proposed a process of clean fracturing flowback-fluid reusing for preparing drilling fluid. The corresponding conditions of optimum performance of prepared drilling fluid were screened by orthogonal designed experiment,range analysis,and single-factor experiment. From linear bentonite swelling experiment and mud ball experiment,the results indicate that the drilling fluid prepared by the backflow-liquid of clean fracturing and its supernatant have a good inhibitory effect on the hydration expansion of clay,and the inhibition capability is better than that of 4% KCl solution.
引文
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