江汉平原古生界构造结构特征及油气勘探方向  

Characteristics of Palaeozoic Tectonic Structures and Oil and gas Prospecting in Jianghan Plain

作　　者：郭战峰[1] 杨振武[1] 刘新民[1] 陈红[1] 龙幼康[1] 

机构地区：[1]中国石化江汉油田勘探开发研究院

出　　处：《海相油气地质》2006年第2期9-16,共8页Marine Origin Petroleum Geology

基　　金：中国石化股份有限公司科学技术开发研究项目(编号:P02006)的部分成果

摘　　要：江汉平原古生界具有北西—南东向分为三块、北东—南西向分为三带及纵向上多层楼的构造结构特征。三个区块为当阳—京山构造区、荆州—仙桃构造区及鄂城—大冶构造区,每个区块均可划分出三个次级构造带,并在全区形成三个构造变形分带。这三个分带在变形强度、构造样式等方面具有特征性差异:北东侧的构造分带受东秦岭—大别山造山运动产生的挤压应力的直接作用,显示以逆冲推覆结构为主要特征;南西侧的构造分带在三个构造区有差别,在当阳—京山构造区形成斜坡稳定带,在另两个构造区则以推覆叠瓦构造为特征;中部构造分带一般显示前缘断褶或复合叠加构造。当阳—京山构造区东部和鄂城—大冶构造区应以逆冲推覆体为勘探对象;荆州—仙桃构造区的仙桃地区应以上古生界油气藏为勘探目标;当阳—京山构造区西部宜昌稳定带和荆州—仙桃构造区的珂理—簰洲地区则应以下古生界油气藏为勘探目标。Palaeozoic Tectonic structures in Jianghan Plain are characteristic of comprising three blocks from NW to SE, three belts from NE to SW and mulilayem in vertical succession. The three blocks are Dangyang-Jingshan, Jingzhou- Xiantao and Echeng-Daye structural areas. Each area can be divided into three subordinate struetual belts, which join three deformation sub-bohs in the whole region. Differences are obvious in deformation intensity and tectonic styles among these sub-behs. The tectonic sub-beh in the northeast displays a thrusted nappe under compressing stress from East QinlingDabei Mountain orogenic movement. The tectonic sub-beh in the southwest reveals a stable ramp in Dangyang-Jingshan area and imbricated nappes in other two areas. The middle sub-belt generally displays front fault-folds or compound superimposed structure. It is suggested that the selective targets for oil and gas exploration are： （1） the overthrust nappes in the eastern Dangyang-Jingshan and Eeheng-Daye areas; （2） the Upper Palaeozoic rservoirs at Xiantao zone in JingzhouXiantao area; and （3） the Lower Palaeozoic reservoirs at Yichang stable zone in the western Dangyang-Jingshan area and at Keli-Paizhou zone in Jingzhou-Xiantao area.

关 键 词：古生代 构造结构 构造单元 油气勘探 勘探潜力 勘探方向 江汉平原 

分 类 号：P618.13[天文地球—矿床学] P618.130.2[天文地球—地质学]