一种清洁压裂液的室内性能评价

Laboratory Performance Analysis of Clean Fracturing Fluid

选出一种由长链烷基季铵盐与烷基磺酸盐复配的黏弹性表面活性剂作为清洁压裂液的稠化剂,并以此表面活性剂为主剂;向其中添加黏土稳定剂等其它添加剂,并通过单因素分析和正交实验方法,优选出新型清洁压裂液体系的配方;对其抗温性能、耐剪切性能、悬砂性能、破胶性能及黏弹性进行了室内分析。结果表明,该清洁压裂液体系具有良好的抗温稳定性,耐剪切能力强,悬砂性能好,破胶完全,破胶后残渣量较少,并且配制简单。

A viscoelastic surfactant which contained a long chain alkyl quaternary ammonium compound with a kind of alkyl sulfosalt as the thickening agent of clean fracturing fluid was selected.Then this surface active agent was used as main agent, clay stabilizer and others additives were added.The formulation of new clean fracturing fluid was obtained through single factor analysis and orthogonal test method.The temperature resistance,shear resistance,sand-suspend,gel breaking and viscoelastic performance were analyzed in the laboratory.The results showed that the clean fracturing fluid system had good temperature stability,strong shear resistance,good sand-suspend performance,and the residue and viscosity of the system after gel breaking were at a low level,which can be easy prepared.