探矿工程-岩土钻掘工程2015，Vol.42Issue(12)：13-17,5.
pH 值对适于页岩气储层的SDBS 压裂液性能的影响研究
Research on the Influence of pH on the Performance of SDBS Fracturing Fluid Suitable for Shale Gas Reservoir
摘要
Abstract
In the fracturing treatment process of shale gas reservoir with low permeability and low porosity, pH value of fracturing fluid system directly affects the formation and stability effects of fracturing, it also affects the anionic surfactant fracturing fluid a lot in viscosity, surface tension and shale swelling inhibitory.In this paper, by changing the concentration of the anionic surfactant, basic performance changes of fracturing fluid system in different pH conditions are measured.The experiment results indicate that the SDBS viscosity of SDBS fracturing fluid system increases with pH increase first, then decreases, and reaches the maximum when pH is 9.The best ability to reduce surface tension of the system is with pH 5. The expansion volume of the shale increases gradually with the increase of pH, and reaches the largest when pH is 7;along with the further increase of pH value, shale expansion decreases first and then increases, the expansion capacity is the smallest when pH is 9.When the pH value is invariable, SDBS can inhibit the shale expansion most in the state of critical micelle concentration.In this paper, the effect of pH value on the performance of SDBS fracturing fluid is analyzed from the chemical micro point of view, which is beneficial to the optimization of SDBS fracturing fluid system formula.关键词
SDBS压裂液/pH值/粘度/表面张力/膨胀抑制性/页岩气Key words
SDBS fracturing fluid/pH value/viscosity/surface tension/expansion inhibition/shale gas分类
能源科技引用本文复制引用
冯科玮,曹函,施皆能,吴坤,鲁晓敏..pH 值对适于页岩气储层的SDBS 压裂液性能的影响研究[J].探矿工程-岩土钻掘工程,2015,42(12):13-17,5.基金项目
国家自然科学基金"含煤层气储层物性与压裂液微观特性动态耦合作用机理研究"(编号:41302124) （编号:41302124）
中南大学大学生自由探索计划项目"适于页岩气储层的高抑制性阴离子压裂液实验研究"(编号:2282014bks010) （编号:2282014bks010）
