Review of 3D Digital Core Modeling Methods and Their Applications in Oil and Gas Reservoirs
作者单位：State Key Laboratory of Geomechanics and Geotechnical EngineeringInstitute of Rock and Soil MechanicsChinese Academy of Sciences University of Chinese Academy of Sciences
会议日期：2019年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
关 键 词：Digital core Core scale modeling Physical experiment method Numerical reconstruction method
摘 要：With the help of statistical physics and computer technology,the three-dimensional digital core modeling method can provide a basic model for numerical simulation of pore structure and physical properties of rocks.The digital image of the real rock sample is obtained by scanning the rock sample with appropriate resolution,and the pore structure model inside the rock is reconstructed by the numerical reconstruction method.After literature research,this paper introduces ten commonly used 3 d digital core modeling methods in physical experiment method and numerical reconstruction method respectively,and analyzes the advantages and disadvantages of these methods in modeling and the ways of combining them.For the modeling of highly heterogeneous and dense rocks in oil and gas reservoirs,especially shale,on the one hand,the combination of resolution of FIB-SEM and nano CT,as well as the combination of imaging regional scale and REV scale should be considered.The accurate differentiation of organic matter and various mineral categories with the help of RGB value still needs to be made.On the other hand,it is necessary to improve the algorithm and put forward more efficient new points in the selection of numerical reconstruction methods.For example,according to the difference of organic matter and inorganic matter,pore and crack structure and scale,more advantageous methods are used to distinguish modeling and finally superposition.The cross-scale connection between the reconstructed models is also a key problem to be solved in the future.