摘要：The flowback rate of hydraulic fracturing in shale gas wells is low. During fracturing and blowout, large amount of fracturing fluid enters the pores of shale matrix from the fracture end face under the action of capillary force and chemical osmosis. The reservoir shale is compact, and the clay minerals with micro-nano pore sizes can effectively serve as semi-permeable membranes. There is a chemical potential difference between fracturing fluid and the reservoir pore fluid, and the fracturing fluid is chemically coupled with the shale reservoir matrix. Considering the deformation of fracturing fluid and reservoir rock, under the framework of porous media, hydraulic and chemical interactions affect the fluid system composed of fracturing fluid and formation fluid. In this paper, a model considering mechanical interaction between solid and liquid phases, coupling effect of solute diffusion and the induced pore pressure by chemical osmosis between shale gas reservoir and fracturing fluid was established. Considering the porosity and permeability of reservoir shale, the spatial and temporal variation of induced pore pressure and fluid solute concentration under chemical action is analyzed. According to the differences of shale fractures and matrix structures, the interaction between insitu fracturing fluid and shale reservoir is analyzed respectively.
© 2019 SEG

卷、期、页：p3668-3672

发表日期：2020-01-01

发表期刊名称：SEG International Exposition and Annual Meeting 2019

通讯作者：常龙,刘桐源,黄荣燕

第一作者：葛洪魁,申颍浩,王小琼

论文类型：会议论文

论文概要：常龙,葛洪魁,申颍浩,王小琼,刘桐源,黄荣燕，Influence of reservoir shale physical properties on the multi-field coupling of fracturing fluid-shale interactions，SEG International Exposition and Annual Meeting 2019，2020，p3668-3672

论文题目：Influence of reservoir shale physical properties on the multi-field coupling of fracturing fluid-shale interactions