海相油气地质2025，Vol.30Issue(5)：481-499,19.DOI:10.3969/j.issn.1672-9854.2025.05.009
四川盆地海相碳酸盐岩规模优质储层分布与勘探方向
Distribution of large-scale high-quality carbonate reservoirs and exploration directions in the Sichuan Basin
摘要
Abstract
Marine carbonates have played a crucial role in the over 70-year natural gas exploration history of the Sichuan Basin,and will remain a primary target field for natural gas exploration and development for a long time to come.Based on the study of tectonic and lithofaies paleogeographic evolution of the entire marine strata,a systematic analysis of the macro-control factors and the influencing factors of the reservoirs of different formations has been conducted in order to explicitly define the distribution and exploration directions of large scale high-quality marine carbonate reservoirs in the Sichuan Basin.The study concludes that:(1)The marine strata of Sichuan Basin has undergone four major tectonic cycles,with 13 significant tectonic movements.Of these,two tension-dominated movements created the paleogeographic pattern of the trough-platform alternation,while eleven uplift-dominated movements governed the sedimentary characteristics of the large platform/ramp.(2)The conventional marine carbonate reservoirs in the Sichuan Basin can be simply divided into two main types:sedimentary facies-controlled reservoir and karst reservoir.The development of high-quality reservoirs is macroscopically controlled by tectonic processes,mainly distributed in the inclined areas of ancient uplifts and the geomorphic high zone on both sides of the ancient rifts.(3)Six potential areas for large-scale exploration of carbonate rocks in the future in the Sichuan Basin are proposed:the platform-margin zone of the Dengying Formation on the west side of the Deyang-Anyue rift trough,the dolomitization shoal of the Lower Paleozoic on the east edge of paleo-uplift in the central Sichuan Basin,the multi-layered platform-margin zone of the Upper Paleozoic on the west side of the Sichuan Basin,the dolomitization shoal of the lower part of the lower second member of Maokou Formation in Xuanhan-Wanzhou area of the eastern Sichuan Basin,the dolomitization shoal of the third member of Maokou Formation in Yilong-Quxian area of the eastern Sichuan Basin,and reef-shoal limestones of the Changxing Formation along and within the Pengxi-Wusheng intra-platform sag.关键词
海相层系/碳酸盐岩/规模优质储层/勘探方向/四川盆地Key words
marine strata/carbonate rocks/large scale high-quality reservoirs/exploration directions/Sichuan Basin分类
石油、天然气工程引用本文复制引用
张本健,张驰,潘立银,朱可丹,郝毅,周刚,和源,付小东,张玺华,杨岱林,辛勇光,张自力..四川盆地海相碳酸盐岩规模优质储层分布与勘探方向[J].海相油气地质,2025,30(5):481-499,19.基金项目
本文受中国石油重大专项课题"碳酸盐岩油气富集规律及有利区带研究"(编号:2023ZZ16YJ01)、中国石油天然气股份有限公司科技项目"中国石油重点地区风险勘探目标研究"(编号:2023YQX10101)及国家自然科学基金项目"盆山体系碳酸盐岩中流体活动及其成岩改造作用的低温热年代学研究"(编号:42172183)联合资助 （编号:2023ZZ16YJ01）
