石油实验地质2026，Vol.48Issue(1)：22-35,14.DOI:10.11781/sysydz2026010022
四川盆地中侏罗统凉高山组全油气系统成藏特征及有序分布
Accumulation characteristics and orderly distribution of whole petroleum system in Middle Jurassic Lianggaoshan Formation,Sichuan Basin
摘要
Abstract
The Middle Jurassic Lianggaoshan Formation in the Sichuan Basin has abundant oil and gas resources and exhibits favorable accumulation conditions,showing great exploration and development potential.It represents an important area for recent reserve growth and production enhancement in the Sichuan Basin.Through analytical methods such as core observation,thin section identification,cathodoluminescence,laser confocal microscopy,scanning electron microscopy(SEM),and geochemical analysis,the lake basin sedimentary evolution and accu-mulation conditions of the Lianggaoshan Formation were systematically studied.The study clarified the distribu-tion characteristics of source rocks and sand bodies,the source-reservoir configuration relationships,and the oil and gas distribution patterns.The Lianggaoshan Formation in the Sichuan Basin mainly developed a lacustrine-deltaic sedimentary system,with the delta front comprising various sand body types,including subaqueous distributary channels,mouth bars,subaqueous natural levees,sheet sands,and beach-bar sands.Vertically,two sets of source rocks developed:the lower and middle-upper sub-members of the second member of the Lianggaoshan Forma-tion.Horizontally,three hydrocarbon generation centers were identified in northern,central,and eastern Sichuan Basin.Overall,the Lianggaoshan Formation in the Sichuan Basin showed accumulation characteristics of the whole petroleum system,with multi-layer and multi-type reservoirs overlapping and coexisting orderly.Vertically,from bottom to top,the reservoirs included intra-source shale oil and gas,intra-source tight oil and gas in beach-bar sandstones,near-source tight oil and gas in channel sandstones,and extra-source tight gas in channel sand-stones.Horizontally,these four types of favorable zones extended from the lake basin center towards its margins.The whole petroleum system accumulation-enrichment model of the Middle Jurassic Lianggaoshan Formation in the Sichuan Basin established based on this understanding has effectively guided exploration breakthroughs of different reservoir types in this area,holding important reference significance for hydrocarbon exploration in similar areas.关键词
全油气系统/油气成藏模式/致密油气/页岩油气/凉高山组/四川盆地Key words
whole petroleum system/hydrocarbon accumulation model/tight oil and gas/shale oil and gas/Lianggaoshan Formation/Sichuan Basin分类
能源科技引用本文复制引用
王威,杜红权,黎承银,刘晓晶,徐宇轩..四川盆地中侏罗统凉高山组全油气系统成藏特征及有序分布[J].石油实验地质,2026,48(1):22-35,14.基金项目
国家科技重大专项(2025ZD1400405)、中国石化科技部重大项目(P23221)和中国石化科技部项目(P25180)联合资助. （2025ZD1400405）
