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四川盆地西部坳陷南区 ,即大邑—新津一线以南、龙门山以东、龙泉山以西、名山—丹棱—眉山一线以北约 30 0km2 的地区。近年来在侏罗纪地层中发现了大量工业性天然气藏。侏罗系的层序地层及其与油气关系的研究引起了人们的极大关注。笔者对区内侏罗系采用层序地层学观点进行了详细的野外露头和室内钻井、测井、地震层序分析。在侏罗系中识别出 9个层序界面 ,并划分为 8个三级层序。论文对层序地层与油气关系进行了论述 ,指出区内侏罗系浅气层最有利勘探区为平落坝、大兴西、松花镇、白马庙等地 ,有利勘探区为蒲江、邛西、观音寺等地。
The southern area of the western depression in the Sichuan Basin is about 30 km north of Dayi-Xinjin first line, east of Longmen Mountain, west of Longquanshan, and famous mountain-Danling-Meishan line. In recent years, a large number of industrial natural gas reservoirs have been found in the Jurassic strata. Jurassic sequence stratigraphy and its relationship with oil and gas caused great concern. The author conducted a detailed outcrop and indoor drilling, logging and seismic sequence analysis of the Jurassic in the area based on sequence stratigraphy. Nine sequence boundaries were identified in the Jurassic and divided into eight tertiary sequences. The paper discusses the relationship between sequence stratigraphy and oil and gas, and points out that the most favorable exploration areas for Jurassic shallow gas in the area are Pingluoba, Daxing West, Songhua and Baimamiao, while the favorable exploration areas are Pujiang, Guanyin Temple and other places.