古地理学报2025，Vol.27Issue(5)：1104-1118,15.DOI:10.7605/gdlxb.2025.059
川南地区茅口组一段储集空间定量表征
Quantitative characterization of reservoir space in the first member of Maokou Formation,Southern Sichuan Basin
摘要
Abstract
The first member of the Permian Maokou Formation in the Sichuan Basin,characterized by argillaceous carbonate rocks that exhibit both source and reservoir properties,making it a significant area for exploration.This study focuses on the development and characteristics of various pore types within these rocks.In this study,the qualitative and quantitative characterizations of pore types and their correlations and controlling factors were studied in detail.This was achieved through the measurement of porosity,X-ray diffraction analysis of whole-rock minerals,and total organic carbon(TOC)content analysis of 60 core samples from three wells in the southern Sichuan Basin.Additionally,qualitative observations were performed using argon ion polishing scanning electron microscopy on selected samples.Quantitative results indicate that samples from wells GS1 and JH1 are predominantly composed of organic-related pores,whereas samples from well TY1 exhibit substantial contributions from both clay mineral-related and organic-related pores.Statistical analysis reveals that when clay mineral content ranges between 15％and 50％,and TOC content exceeds 1％,the highest number of samples with porosity greater than 2％is observed.For marlstone with low clay mineral content(＜10％),pore development is primarily controlled by TOC content and the degree of organic pore development.A clear positive correlation exists between porosity and TOC content,with a correlation coefficient as high as 0.87.As clay mineral content increases,the contribution of clay mineral-related pores to total porosity becomes more significant.Overall,the development of argillaceous carbonate reservoir space in the first member of the Maokou Formation is primarily influenced by clay mineral and TOC content.These findings have important implications for evaluating regional differences in reservoir development.关键词
泥质灰岩/碳酸盐岩/定量表征/茅口组/四川盆地Key words
argillaceous limestone/carbonate/quantitative characterization/Maokou Formation/Sichuan Basin分类
天文与地球科学引用本文复制引用
尤东华,张力钰,李蓉,宋晓波,俞凌杰,周凌方,蒋小琼..川南地区茅口组一段储集空间定量表征[J].古地理学报,2025,27(5):1104-1118,15.基金项目
国家自然科学基金企业创新发展联合基金(编号:U24B6001,U19B6003)和中国石油化工股份有限公司科技项目(编号:P22214-3,P22073)联合资助.[Co-funded by the Enterprise Innovation and Development Joint Fund of National Natural Science Foundation of China(Nos.U24B6001,U19B6003)and the Scientific and Technological Project of Sinopec(Nos.P22214-3,P22073)] （编号:U24B6001,U19B6003）
