鄂西渝东区上古生界构造型式及对石炭系勘探认识

鄂西渝东区海相地层经历了多期构造运动 ,受到过多种应力场作用 ,因应力条件、介质条件和边界条件差异 ,形成了现今比较复杂的构造面貌。纵向上 ,因上、下构造变形层抗应变能力的不同 ,在挤压应力作用下发生差异形变 ,产生纵向变异 ;横向上 ,形成了隆凹相间的区域构造面貌。本文根据鄂西渝东区区域和局部构造特征、构造型式、展布规律 ,论述了古、今构造对本区油气运移和聚集的控制作用 ,指出本区石炭系勘探的有利区带及目标。

Structural Style of Upper Paleozoic and Carboniferous Exploration in Western Hubei Province -Eastern Chongqing

Multiphase tectonic movement has occurred in marine strata in Western Hubei-Eastern Chongqing area, and the marine strata have suffered from the influence of many kinds of stress fields. Due to the difference in stress, medium and boundary conditions, very complicated structural configuration has formed at present. In vertical, differential deformation occurred under compressional stress because of different anti-strain capacities in tectonic deformation zones, which result in tectonic variation. In lateral, with uplift and depression regional structural style formed, according to regional and local tectonic features, structural styles as well as distributing laws in Western Hubei-Eastern Chongqing area, this paper discusses about the controlling roles of old and newly-formed structures on hydrocarbon migration and accumulation. The favorable exploration belts and targets in carboniferous series.