四川盆地高石梯—磨溪古隆起构造特征及对特大型气田形成的控制作用  

Tectonic features of Gaoshiti-Moxi paleo-uplift and its controls on the formation of a giant gas field, Sichuan Basin, SW China

作　　者：魏国齐[1] 杨威[1] 杜金虎 徐春春[3] 邹才能[4] 谢武仁[1] 武赛军[4] 曾富英[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院 [2]中国石油勘探与生产公司 [3]中国石油西南油气田公司 [4]中国石油勘探开发研究院

出　　处：《石油勘探与开发》2015年第3期257-265,共9页Petroleum Exploration and Development

基　　金：国家科技重大专项(2011ZX05007);中国石油天然气股份有限公司项目(2011B-0603)

摘　　要：应用四川盆地最新地质、地震、钻井及露头等资料,对高石梯—磨溪古隆起地质结构、地质演化进行研究,探讨安岳震旦系—寒武系特大型气田形成的控制因素。高石梯—磨溪古隆起为一主要与桐湾运动有关的近南北向巨型同沉积古隆起构造,其核部高石梯—磨溪地区震旦系灯影组顶面及相邻层系自震旦纪至今一直处于隆起高部位,并发育独立统一的巨型圈闭构造,其发育时期、地质结构、演化历史等构造特征明显有别于加里东期乐山—龙女寺古隆起。高石梯—磨溪古隆起控制安岳震旦系—寒武系特大型气田的形成与分布,主要表现为:古隆起西侧紧邻绵竹—长宁克拉通内裂陷寒武系麦地坪组、筇竹寺组烃源岩中心,且自身也发育震旦系灯影组和寒武系筇竹寺组烃源岩;控制了震旦系灯四段、灯二段和寒武系龙王庙组优质储集层的形成与展布;发育3套储盖组合,为震旦系—寒武系大规模古油藏原位裂解形成特大型气藏提供了条件。Based on the latest geological, seismic, drilling and outcrop data in the Sichuan Basin, the geological structure and evolution history of Gaoshiti-Moxi paleo-uplifl was studied to find out controlling factors of the Sinian-Cambrian Anyue giant gas field. The Gaoshiti-Moxi paleo-uplifl is an N-S trending syndepositional paleo-uplift related to the Tongwan movement. The top of Sinian Dengying Formation and adjacent strata in the central part of the paleo-uplift, namely the Gaoshiti-Moxi Area, has remained in the relatively high position since the Sinian, and a giant trap structure is developed independently in the area, which is different from Caledonian Leshan-Longniisi paleo-uplift in development time, geological structure and evolution history. The Gaoshiti-Moxi paleo-uplift controls the development and distribution of the Sinian-Cambrian Anyue giant gas field, which is shown in the following aspects： （1） The westem part of the paleo-uplift is adjacent to the source rock center of Cambrian Maidiping and Qiongzhusi Formations in Mianzhu-Changning intracratonic taphrogenic trough, and the source rocks of Sinian Dengying Formation and Cambrian Qiongzhusi Formation also occur in the Gaoshiti-Moxi paleo-uplift itself; （2） the paleo-uplift controls the formation and distribution of the high-quality reservoirs of the fourth and second members of Sinian Dengying Formation and Cambrian Longwangmiao Formation; and （3） there develop 3 sets of reservoir-seal assemblages which provide favorable conditions for the formation of the giant gas pool from in-situ cracking of paleo-oil reservoirs in the Sinian-Cambrian.

关 键 词：四川盆地 高石梯—磨溪古隆起 同沉积古隆起 构造特征 古油藏原位裂解 

分 类 号：TE122.1[石油与天然气工程—油气勘探]