Porosity of gas shale:Is the NMR-based measurement reliable?

作     者：Peng Zhao Bo He Bo Zhang Jun Liu Peng Zhao;Bo He;Bo Zhang;Jun Liu

作者机构：Key Laboratory of Deep Underground Science and Engineering(Ministry of Education)College of Architecture and EnvironmentSichuan UniversityChengduSichuan 610065China Institute of New Energy and Low-Carbon TechnologySichuan UniversityChengduSichuan 610065China Institute of Science and TechnologyChina Three Gorges CorporationBeijing100038China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2022年第19卷第2期

页      面：509-517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 Science and Technology Department of Sichuan Province(Grant Nos.2021YFH0048 and 2021YFH0118) the Project funded by China Postdoctoral Science Foundation(Grant No.2020M683253) 

主　　题：Gas shale Low-field NMR Porosity measurement Low-temperature nitrogen adsorption 

摘      要：Aiming at obtaining an accurate porosity of gas shale,various approaches are ***,nuclear magnetic resonance(NMR),being treated as a kind of new-developed technique,possesses the representative ***,as a booming technique,the reliability of NMR-based porosity of shale is not exactly *** on NMR device,this work measured the porosity of shale experiencing different water soaking time,accordingly,judging the reliability of NMR-based *** indicate the NMR outcomes vary with the water soaking time,making a doubt about the objectivity of NMRbased porosity in reflecting the real shale ***,some supplementary means were adopted to verify the water soaking-induced variation in the pore system of shale sample,which intensities the suspicion if the NMR-based porosity is reliable or *** sum up,this work considers that the NMR-based porosity of shale is not reliable enough when water is used as the ***,this work also offers some suggestions on how to enhance the reliability of NMR-based porosity of shale ***,this work selects a fresh perspective to analyze the NMR approach in determining shale porosity,which is hopefully helpful in promoting the development of NMR technique in the shale-related field.