海相油气地质2018，Vol.23Issue(2)：39-52,14.DOI:10.3969/j.issn.1672-9854.2018.02.006
四川盆地二叠系栖霞组、茅口组白云岩储层特征、成因和分布
Origin, Characteristics and Distribution of Dolostone Reservoir in Qixia Formation and Maokou Formation, Sichuan Basin, China
摘要
Abstract
Carbonates of Middle Permian Qixia Formation and Maokou Formation had been gas-producing reservoir mainly in southern Sichuan Basin in the last century. It had been accepted that these reservoirs were fractured limestones, resulting in low gas ratio (5.80％) and failure to discover uncompartmentalized gas fields. Based on the investigations and analysis of 6 outcrops, 10 exploration wells, 500 thin sections, and other data of isotope, minor element, rare earth element, fluid inclusion and isotopic age get from 80 samples, three findings are presented as follows:(1)Dolostones with intercrystaline pores, dissolution-enlarged intercrystaline pores and vugs are widespread in Qixia Formation and Maokou Formation; (2) Dolostone reservoirs was predominantly constrained by shoal water carbonate sediments, and the dissolution in freshwater during early diagenetic processes, and the tectonic and hydrothermal events during burial; (3)The dolostone reservoirs are mainly distributed in the 2nd member of Qixia Formation in west and central Sichuan Basin, and in the 2nd and 3rd member of Maokou Formation in west, central and south Sichuan Basin.关键词
四川盆地/二叠纪/栖霞组/茅口组/白云岩储层/储层成因/构造-热液事件Key words
Permian/Qixia Formation/Maokou Formation/Dolostone reservoir/Tectonic event/Hydrothermal event/Sichuan Basin分类
能源科技引用本文复制引用
胡安平,潘立银,郝毅,沈安江,谷明峰..四川盆地二叠系栖霞组、茅口组白云岩储层特征、成因和分布[J].海相油气地质,2018,23(2):39-52,14.基金项目
本文受国家科技重大专项"大型油气田及煤层气开发"(编号:2016ZX05004-002)资助 （编号:2016ZX05004-002）
