中文摘要：

为了探讨四川盆地海相大气田或气田群的成藏条件，利用构造、岩相等方法综合分析了印支期古隆起和加里东期古隆起对海相油气成藏的控制作用。四川盆地海相气田勘探由找背斜构造裂缝性气田，走向了找滩相孔隙储层和古隆起复合型大气田的广阔道路。由泸州古隆起找构造小气田群，到找川东石炭系孔隙性气藏，从开江古隆起上找到了五百梯石炭系大气田和气田群，至该区二叠系和三叠系礁滩勘探更上一层楼，找到了以普光大气田为代表的大中气田群。目前在乐山-龙女寺古隆起获震旦系灯影组和寒武系龙王庙组高产井，出现大好形势。该区储层、古构造和现今构造三位一体叠加在一起，可望获得特大型气田。

英文摘要：

This paper discussed the forming conditions of large marine gas fields and gas field clusters in Sichuan Basin . Based on comprehensive analyses of structure and lithofacies ,we discussed the control of the Indosinian and Caledonian pa -leouplifts on the marine petroleum accumulation .There are significant changes in exploitation targets in the Sichuan Basin , from anticlinal gas fields in the early stage to large gas fields correlated with porous reservoirs of bank facies ,and to com-posite large gas fields related with peleouplifts now .In the first stage of exploration ,small gas field clusters were found in Luzhou peleouplift .In the second stage ,the Carboniferous porous gas reservoirs were discovered in eastern Sichuan Basin .In the third stage ,the Wubaiti large gas field and gas field cluster were discovered in the Kaijiang paleouplift .In the fourth stage ,medium-to-large gas field clusters represented by Puguang gas field were found in the Permian and Triassic reservoirs of reef-shoal facies .Recently ,several highly-productive wells have been successfully completed in the Sinian Dengying For-mation and the Lower Cambrain Longwangmiao Formation in the Leshan-Longnvsi paleouplift .The favorable superimposition of reservoirs ,paleostructures and modern structures makes it possible to form giant gas field in this area .