鄂西渝东地区石柱古隆起构造沉积演化  

Tectonics and Sedimentology of Shizhu Palaeohigh in Western Hubei-Eastern Chongqing Area/

作　　者：盛贤才 王韶华 文可东 陈立军 

机构地区：[1]中国石油化工股份公司江汉石油分公司勘探开发研究院

出　　处：《海相油气地质》2004年第1期43-52,共10页Marine Origin Petroleum Geology

摘　　要：石柱古隆起区的构造演化可划分为加里东、海西—早印支、晚印支—早燕山、晚燕山—早喜马拉雅、晚喜马拉雅等五个阶段。海西期—早印支期、晚印支期—早燕山期是石柱古隆起形成并继承性发展的重要时期 ,发育了石炭系黄龙组、二叠系、三叠系、侏罗系等地层序列 ,厚度大于 5 - 0 0 0 -m ,形成了多套生、储、盖成藏组合。三叠纪末的挤压 (晚印支运动 )对石柱古隆起的叠加导致了古圈闭的最终形成 ,圈闭高度达 10 0 -m左右 ,隆起幅度达 4 0 0～ 5 0 0 -m左右。此时 ,下志留统、下二叠统烃源岩埋深均大于 2 - 6 0 0 -m ,已进入生气、生油高峰阶段。三叠纪及侏罗纪石柱古隆起是油气运移的有利指向区及聚集区 ,侏罗纪末—白垩纪 (燕山晚期 )则是石柱古隆起圈闭的油气重新运移聚集的重要时期。石柱古隆起及周缘地区成藏条件优越 ,区内现今的圈闭群可认为是天然气勘探的有利靶区。Shizhu Palaeohigh that is located in the central of Yangtze landmass covers two basement tectonic belts, which the western Hubei-Hunan basement-involved belt and the eastern Sichuan-western Hubei basement-relief belt. The presence of it effected and controlled hydrocarbon generation, migration and accumulation in this area. The history of tectonic evolution can be divided into five stages including the Caledonian, the Hercynian-early Indosinian, the late Indosinian-early Yanshan, the late Yanshan-early Himalayan and the late Himalayan. During the Hercynian-early Indosinian and the late Indosinian-early Yanshan stages that were crucial for formation and successive development of Shizhu palaeohigh, a huge thickness (more than 5000m) of Carboniferous, Permian, Triassic and Jurassic sequences were deposited and developed and several plays were formed. When the paleotrap with an enclosure about 100m high formed during Triassic compaction movement, the Lower Silurian and Lower Permian source rocks was buried deep to more than 2600m,which was fairly within the peak stage of hydrocarbon generation. The Shizhu palaeohigh is just the good place that hydrocarbon migrated to and accumulated in during Triassic and Jurassic and remigrated to and reaccumulated in by the end of Jurassic and Cretaceous. It is convinced that the nowadays traps exiting in the area of Shizhu palaeohigh and its peripheries with good conditions for hydrocarbon accumulation can be regarded as the good targets for gas exploration.

关 键 词：古隆起 石柱隆起 沉积史 构造演化 渝东地区 

分 类 号：TE121.3[石油与天然气工程—油气勘探]