Organic Matter Occurrence and Its Effects on Pore Structure and Methane Adsorption Capacity:A Case Study of the Niutitang Black Shale in Guizhou,China  

作　　者：Peng Xia Fang Hao Jinqiang Tian Yong Fu Yuliang Mou Chuan Guo Zhen Yang Ke Wang 

机构地区：[1]Resource and Environmental Engineering College,Guizhou University,Guiyang 550025,China [2]Key Laboratory of Ministry of Education for Geological Resources and Environment,Guiyang 550025,China [3]School of Geosciences,China University of Petroleum,Qingdao 266580,China

出　　处：《Journal of Earth Science》2025年第2期597-610,共14页地球科学学刊(英文版)

基　　金：financially supported by the National Natural Science Fund of China(Nos.42002166,41690134,42162016);the Guizhou Provincial Fund Project(Nos.[2020]1Y161,ZK[2021]199,ZK[2022]106)。

摘　　要：The black shale samples from the Niutitang Formation in the Yangtze Block were sequentially treated using organic solvent extraction and wet chemical oxidation.The organic matter(OM)in the shales includes physically mobile OM(PmOM),chemically mobile OM(CmOM),and stable OM(StOM).The CmOM has the strongest CH_(4)adsorption capacity because it has the largest volume of micropores and mesopores.In contrast,the PmOM has a very negative effect on the CH_(4)adsorption because it is poreless.The XD shale is a siliceous shale,in which the quartz particles wrap partly OM,preventing extraction and oxidation.The SL shale is an argillaceous shale,in which most of the OM is combined with clay minerals to form organo-clay composites.In both the SL and XD shales,the OM that is extractable via organic solvents is distributed among the mineral particles and is interconnected.The conceptual model of marine black shale in different environments needs to be perfected in the future because quantitative and qualitative methods should be combined to clarify the relationship between the known OM types(e.g.,pyrobitumen,solid bitumen,and solid kerogen)and the OM types identified in this study.

关 键 词：organic matter pore structure black shales shale gas Early Cambrian petroleum geology 

分 类 号：P618.13[天文地球—矿床学]