川西地区三叠系发育马鞍塘组滩相裂缝-孔隙型储层、雷口坡组顶部不整合面岩溶缝洞型储层以及雷口坡组台地边缘滩和台内滩相孔隙型储层等多套多种类型的碳酸盐岩储层,油气地质条件良好.认为川西坳陷中段孝新-合丰构造带主要以雷口坡组台内滩、不整合面岩溶储层及马鞍塘组滩相储层为主要勘探目标层系,其中孝泉、新场构造是近期该构造带最有利的勘探目标.坳陷西缘构造带主要以雷口坡组台缘滩及马鞍塘组浅滩相储层为主要勘探目标层系,圈闭面积较大的安县、鸭子河、大邑构造是该构造带风险勘探的有利目标.坳陷东坡构造带主要以雷口坡组台内滩相及不整合面岩溶储层为目标.

Good petroleum geology conditions are possessed in Triassic marine reservoirs in Chuanxi Depression, Sichuan Basin. Several sets of Triassic carbonate reservoirs are developed, which include Ma'antang shoal facies fracture-pored reservoir, Leikoupo unconformable karstic cavern reservoir, and Leikoupo platform-marginal shoal facies and intraplatform shoal facies fracture-pore reservoir. It is suggested that these reservoirs are the main exploration targets in Xiaoxin-Hefeng Belt in middle Chuanxi Depression. In Xiaoxin-Hefeng Belt, the Xiaoquan and Xinchang anticlines should be the most prospective targets in recent. Along the western margin of the Depression, Leikoupo platform-marginal shoal facies reservoir and Ma'antang shoal facies reservoir should be the main prospective targets and Ancian, Yazihe and Dayi anticlines that are larger area of traps should be the risk prospective targets. Along the eastern slope of the Depression, the Leikoupo platform-marginal shoal facies reservoir and the Leikoupo unconformable karstic reservoir should be the prospective targets.