石油勘探与开发2012，Vol.39Issue(4)：406-416,11.
乐山-龙女寺古隆起构造演化及对震旦系成藏的控制
Tectonic evolution of the Leshan-Longnüsi paleo-uplift and its control on gas accumulation in the Sinian strata,Sichuan Basin
摘要
Abstract
Based on structural interpretation of the recent seismic data in central Sichuan Basin, combined with data of drilling and outcrops around the basin, this paper discusses the evolutional characteristics of unconformities at various stages in the Leshan-Longniisi paleo-uplift, and studies the evolution of the paleo-uplift and its control on Sinian gas reservoir accumulation. Sinian, Paleozoic, Mesozoic and other major regional unconformities were developed in the Leshan-Longniisi paleo-uplift. According to characteristics and denudation thickness of the unconformities, the paleo-uplift tectonic evolution is divided into four stages, namely, embryonic, developmental, stable burial, and finalizauon. The analysis of the effects of the tectonic evolution on the Sinian gas accumulation show that: (1) the unconformities controlled the development of ancient karst reservoirs relevant to paleo-weathering crust; (2) the tectonic evolution of the paleo-uplift controlled evolution of organic matter and hydrocarbon migration and accumulation; (3) morphological changes of the paleo-uplift controlled the formation and the mergence of structural traps.关键词
四川盆地/古隆起/震旦系/构造演化/天然气成藏/不整合/古岩溶Key words
Sichuan Basin/ paleo-uplift/ Sinian strata/ tectonic evolution/ gas accumulation/ unconformities/ ancient karst分类
能源科技引用本文复制引用
许海龙,魏国齐,贾承造,杨威,周天伟,谢武仁,李传新,罗贝维..乐山-龙女寺古隆起构造演化及对震旦系成藏的控制[J].石油勘探与开发,2012,39(4):406-416,11.基金项目
国家"十一五"科技攻关项目"中国大型气田形成条件、富集规律及目标评价"(2008ZX05007) （2008ZX05007）
