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