Investigating microscopic seepage characteristics and fracture effectiveness of tight sandstones:a digital core approach

作     者：Jing Li Xiao-Rong Li Ming-Shui Song Hui-Min Liu Yong-Cun Feng Chen Liu Jing Li;Xiao-Rong Li;Ming-Shui Song;Hui-Min Liu;Yong-Cun Feng;Chen Liu

作者机构：College of Pipeline and Civil EngineeringChina University of Petroleum(East China)Qingdao 266580ShandongChina College of Safety and Ocean EngineeringChina University of Petroleum(Beijing)Bejing 102220China Sinopec Shengli Oilfield CompanyDongying 257000ShandongChina College of Petroleum EngineeringChina University of Petroleum(Beijing)Bejing 102220China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2021年第18卷第1期

页      面：173-182页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.41972138) the Technology Major Project of China(Grant No.ZD2019-183007,2016ZX05002-002) 

主　　题：Tight sandstone Digital core approach CT scanning Microscopic seepage characteristics Fracture effectiveness 

摘      要：Microscopic seepage characteristics are critical for the evaluation of tight sandstone *** this study,a digital core approach integrating microscopic seepage simulation and CT scanning was developed to characterize microscopic seepage and fracture effectiveness(the ratio of micro-fractures that contributes to fluid flow)of tight *** simulations were carried out for characterizations of tight *** results show that the axial permeability of the investigated cylindrical tight sandstone from Junggar Basin in China is 0.460μm~2,while the radial permeability is 0.3723μm~2,and the axial and radial effective fracture ratios are 0.4387 and 0.4806,respectively,indicating that cracks are not fully developed and the connectivity between micro-cracks is *** permeability that is difficult to measure by laboratory experiments can be obtained readily using the proposed method in this *** results provide important information for improving the exploration and development of tight sandstone reservoirs.