清水沟地区下侏罗统页岩孔隙结构特征

Pore structure characteristics of Lower Jurassic shale in Qingshui gully area

为研究清水沟地区的页岩孔隙结构特征,本文对区内的地表采集的页岩进行样品进行了等温吸附、孔隙度、比表面积实验等,测试成果表明该地区的泥页岩中纳米级孔隙多为开放性平行板状狭缝孔和倾斜板狭缝孔为主,其孔径分布曲线可以划分为单峰型和双峰型两种,泥页岩中比表面积主要由不大于50nm的微孔和介孔提供,是气体吸附的主要场所;介孔提供了主要的孔体积,是气体贮存的主要场所。

As the research of black shale pore structure characteristics of gully region,in this paper,the area of the isothermal adsorption surface acquisition of shale samples,porosity,specific surface area test,the test results show that the region of mud shale in nanoscale pore is open more parallel plate holes and tilt plate slit slit pore,the pore size distribution curve can be divided into unimodal and bimodal type two kinds,mud shale in the specific surface area is mainly composed of not more than 50 nm microporous and mesoporous,is the main place of gas adsorption. The mesoporous pore provides the main pore volume and is the main place for gas storage.