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湘西大庸上震旦统灯影组震裂角砾岩

石油实验地质

1999年 21卷第3期

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Title

SHATTERED BRECCIA OF THE UPPER SINIAN DENGYING FORMATION IN DAYONG, WEST HUNAN PROVINCE

作者

郭建华王方平刘贵王正允高振中

Authors

GUO Jian-hun WANG Fang-ping LIU Gui WANG Zheng-yong GAO Zhen-zhong

单位

江汉石油学院, 湖北荆沙市434100

Organization

Jianghan Petroleum College, Jingsha, Hubei 434100, China

摘要

湘西大庸上震旦统灯影组中碳酸盐岩震裂角砾岩垂向序列由５个层段组成,自下而上分别为:下伏未震层段、裂缝层段、微褶曲层段、角砾岩层段及上覆未震层段。一个垂向序列代表了一次地震灾变事件。与已有的标准序列比较,缺乏液化均一层段,这可能反映了固结程度较高的较刚性岩体的破裂机理。震裂角砾岩是一种较好的储集岩体,以发生地震的断裂系统为中心,组成向两则储集岩体尖灭的岩性圈闭类型。

Abstract

The vertical succession of carbonate rock's shattered breccia in the Upper Sinian Dengying Formation of Dayong, West Hunan province consists of five layers, from bottom to top including the underlying unshocked layer, the fissure layer, the microfold layer, the breccia layer and overlying unshocked layer. A vertical succession represents a seismic catastrophic event. It lacks liquefied homogeneous layers compared with the preexisting normal succession. This may reflects the fracturing mechanism of the more rigid rock body with higher solidification degree. Shattered breccia is a kind of better reservoir rock body. Centered on the fracture systems where earthquake took place, it forms a lithologic trap type thinning out towards bilateral reservoir rock body.

关键词：

震裂角砾岩; 震积岩; 序列; 储集层; 灯影组; 湘西大庸;

Keywords:

shattered breccia; shock-deposited rocks; reservoirs; succession; the Dengying Formation; Dayong in West Hunan province;

基金项目

“七五”国家科技攻关项目“中扬子台地东南缘震旦系至奥陶系重点层段斜坡带沉积相及成岩作用与储集条件关系研究”部分内容

DOI

https://doi.org/10.11781/sysydz199903219