P-wave and S-wave response of coal rock containing gas-water with different saturation: an experimental perspective

作     者：Dameng LIU Lijing LI Zheng ZHAO Wei CHEN Yidong CAI Yongkai QIU Yingfang ZHOU Dameng LIU;Lijing LI;Zheng ZHAO;Wei CHEN;Yidong CAI;Yongkai QIU;Yingfang ZHOU

作者机构：School of Energy ResourcesChina University of GeosciencesBeijing 100083China Coal Reservoir Laboratory of Natural Engineering Research Center of CBM Development&UtilizationChina University of GeosciencesBeijing 100083China Beijing Furuibao Energy Technology CompanyBeijing 100176China School of EngineeringKing’s CollegeUniversity of AberdeenAB243UE AberdeenUK 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2023年第17卷第1期

页      面：100-108页

核心收录：

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] 

基　　金：This research was funded by the National Natural Science Foundation of China(Grant Nos.42130806 41922016 41830427 and 41772160) 

主　　题：coal rock gas-water water saturation acoustic velocity relative anisotropy 

摘      要：The acoustic response of gas and/or water saturated coal rock is fundamental for establishing the correspondence between the physical properties of the coal reservoir and the characteristics of the well-logging response,which is the technology essential for the geophysical exploration of coalbed methane(CBM).This acoustic response depends on water(Sw)and gas(Sg)saturation among other *** this study,we performed acoustic tests on dry and different gas-water saturated coal samples with different degrees of metamorphism and deformation,collected from several coal mining areas in *** tests enabled us to analyze the influence of coal type and gas-water saturation on the acoustic response of CBM *** results show that the acoustic velocity of P-wave and S-wave(Vp and Vs,respectively),and the relative anisotropy of and Vs,increased with increasing vitrinite reflectance,density,Vp and *** increasing from 0 to 100%,the growth rate of the acoustic velocity decreased with increasing vitrinite *** Vp/Vs ratio of tectonic coal was generally higher than that of primary *** growth rate of the relative anisotropy in tectonic coal was markedly higher than that in primary coal.