A new measurement method for radial permeability and porosity of shale  

作　　者：Zehao Yang Mingzhe Dong 

机构地区：[1]Department of Chemical and Petroleum Engineering,University of Calgary,Calgary AB T2N 1N4,Canada [2]School of Petroleum Engineering,China University of Petroleum,Shandong 266580,China

出　　处：《Petroleum Research》2017年第2期178-185,共8页石油研究（英文）

基　　金：This work was supported by National Key Basic Research Programof China(973 Program)(No.2014CB239103);Natural Sciences and Engineering Research Council of Canada(NSERC)e Canada Excellence Research Chair(CERC)and China University of Petroleum(East China)Postgraduate Innovation Project(No.YCX2017018).

摘　　要：To more conveniently and accurately obtain the radial permeability of shale,a new measurement method was proposed for the pressure attenuation of radial permeability and porosity in shale.Through experiments,this method could be used to get the pressure attenuation curve in annular space between the core and inner wall of PVT vessel under the helium along shale radial flow.Accordingly,a mathematical model was established to obtain the semi-analytical solution between pressure and time in the radial model.Meanwhile,through fitting the experimental results,the concentration conductivity and porosity of shale were obtained,and their relationship was used to derive the radial permeability of shale.This method was adopted to measure the permeability and porosity of two cores under three sets of different initial pressures in the annular space.The permeability test results were compared with those obtained by the conventional Dicker method and Smits pressure-attenuation method,and the porosity test results were also compared with those obtained by the conventional porosimeter,thus the feasibility and superiority of this method were confirmed.In contrast to the conventional pressureattenuation methods,this new model had advantages of simpler instruments and more convenient operation,and was also easy to measure the radial permeability and porosity of shale.

关 键 词：Radial permeability and porosity Pressure attenuation Annular space Concentration conductivity coefficient SHALE 

分 类 号：P61[天文地球—矿床学]