文献类型：会议论文

英文题名：The characteristics and developmental control factors of microscopic pore structure in shale gas reservoirs in the Lower Cambrian Qiongzhusi Formation

作者：Yang, Wei Qin, Yuanyuan Zhang, Tingshan

第一作者：杨巍

通信作者：Yang, Wei|[144404961ca5bbdec54d3]杨巍;

机构：[1] School of Resources and Environmental Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [2] School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China

第一机构：贵州理工学院资源与环境工程学院

通信机构：|贵州理工学院资源与环境工程学院

会议论文集：2020 6th International Conference on Energy Science and Chemical Engineering

会议日期：July 17, 2020 - July 19, 2020

会议地点：Dali, China

语种：英文

外文关键词：Frequency modulation - Gas adsorption - Gases - Microporosity - Pore structure - Shale gas

年份：2020

摘要：The Early Cambrian Qiongzhusi Formation on the southern margin of the Sichuan Basin (Southern China) has experienced a long geological process. High degree of thermal evolution of the organic matter shows a great impact on the organic evolution, reservoir microscopic pore types and structure characteristics in this formation. In this study, we investigate the major types and structural features of microscopic pores in shale gas reservoirs of the Qiongzhusi FM. Different types of matrix pores are found, over-mature shale gas reservoirs in the Qiongzhusi FM. mainly have well-developed micropores, but their average specific surface area (SSA) and pore volume are smaller than those in the Longmaxi Formation. The degree of thermal evolution poses the greatest impact on microscopic pore structure, which is significantly positively correlated with SSA and pore volume; however, when exceeding this range, SSA and pore volume both drastically decrease with increasing degree of thermal evolution. Compared with those in the Longmaxi FM., microscopic pores of shale gas reservoirs in the Qiongzhusi FM. feature pore- SSA and large surface porosity. The better the development of micropores, the larger the SSA and Vp of shales, which are more conducive to shale gas adsorption and accumulation. ? Published under licence by IOP Publishing Ltd.