摘要
页岩气开采过程中压裂反排液无机化学成分复杂,对反排液水化学特征的模拟对深入理解反排液的内在组分特性具有重要意义。利用Visual MINTEQ软件对宜宾市某县页岩气压裂反排液的水化学特征进行模拟,分析典型反排液中主要阳离子及阴离子在特征温度及pH条件下的水化学特征。研究结果表明:①反排液中的阴离子及阳离子具有较高的活度;②反排液中重晶石的饱和指数大于零,处于饱和状态,将有明显生成沉淀的趋势。研究结果对理解页岩气开采反排液的水化学特征具有一定的参考价值,为反排液的高效节能处置提供重要的理论指导。
In the process of shale gas exploitation, the inorganic chemical composition of fracturing fluid is complex. The simulation of the hydrochemical characteristics of fracturing fluid is of great significance to understand the intrinsic component characteristics of fracturing fluid. In this paper, Visual MINTEQ software is used to simulate the hydrochemical characteristics of shale gas fracturing fluid in a county of Yibin, and the hydrochemical characteristics of main cations and anions in fracturing fluid under different temperature and pH conditions are studied. The research results show two points, which are as follow. Firstly, The anions and cations in the fracturing liquid have high activity. Secondly, the saturation index of barite is greater than zero and in the saturated state, which will have an obvious tendency to form precipitation. The research results have certain reference value for understanding the hydrochemical characteristics of fracturing fluid in shale gas production, and provide important theoretical guidance for the efficient and energy-saving disposal of fracturing fluid.
作者
王鸿斌
WANG Hongbin(School of Architecture and Civil Engineering,Chengdu 610106,China)
出处
《河南水利与南水北调》
2022年第9期97-98,共2页
Henan Water Resources & South-to-North Water Diversion
关键词
页岩气
反排液
活度
饱和指数
shale gas
fracturing fluid
activity
saturation index
