沪州古隆起与川南油气

THE LUZHOU PALEOHIGH ANDOIL/GAS ACCUMULATION IN SOUTHERN SICHUAN

安作相

An Zuoxiang

石油工业出版社, 北京100011

Petroleum Industry Press

四川盆地沪州古隆起形成于印支运动,它对二叠系阳新灰岩和三叠系嘉陵江灰岩中的气藏的形成起着控制作用。从目前两个层系油气的分布状态看,可能经历了两次运聚过程。另外,天然气的组分特征、成因类型、干燥系数等也都反映了这一控制的关系。沪州古隆起区在燕山-喜马拉雅运动中改变了隆-拗的构造格局,不仅二叠系、三叠系中的油气发生了转化、再次运移和重新聚集,而且下古生界奥陶系中的天然气也经历了同样的过程。预计其油气可能聚集在古隆起区的边缘地带。

The Luzhou Paleohigh of the Sichuan basin was formed during the Indosinian movement.It controlled gas accumulation in the Permain Yangxin limestones and the TriassicJialingjiang limestones. With regard to present hydrocarbon distribution of the two sequences,they might undergo two times of migration and accumulation. In addition,composition,origin and dry factor of gas also revealed the same result. Structural pattern of upliftand depression in the Luzhou Paleohigh was changed during the Yanshanian-Himalayanmovement. As a result of this, the hydrocarbon in the Permian and the Triassic was inversed,remigrated and re-accumulated, and gas in the Ordovician had the same experience.It was expected that hydrocarbon was accumulated in the margins of the paleohigh.

https://doi.org/10.11781/sysydz199603267