当阳地区地震地质特征浅析  

An Elementary Analysis to Seismic Geologic Characteristics in Dangyang Area

作　　者：杨玉江[1] 

机构地区：[1]江汉石油管理局地质调查处

出　　处：《海相油气地质》1997年第4期8-13,共6页Marine Origin Petroleum Geology

摘　　要：本区构造发展存在三个不同阶段:印支期为初始褶皱阶段;燕山期为逆冲推覆定型阶段;喜马拉雅期为改造与破坏阶段。其地质结构明显具有双重构造、构造反转和推覆滑脱三大特征。区内地震反射特征与岩性组合有一定对应关系,本文首次尝试利用地震反射信息特征对沉积环境进行分析。当阳地区存在三种基本构造样式:断滑型、断弯型和断块型。其中断滑型为较理想的构造圈闭,有利于油气聚集与保存;断弯型次之;断块型构造因顶部受张性断裂影响而开启,不利于油气成藏。There are three stages of structural development in the region:initial folding in Indo-Sinian epoch,overthrusting in Yanshan epoch and reforming and destroying in Himalayan epoch.It is obvious that the geological structures are characterized by double structure,structural reverse and overthrust decollernent.A seismic reflection feature in the region has a certain correspondence to a lithological association.It is the first time for the paper to try to use the seismic reflection information characteristics to analyze the deposit environment.There are three basic styles of structures of fault slip,fault flexure,fault block as well in Dangyang area.Among these structures the fault slip structure is the best trap favorable for oil/gas accumulation and preservation,followed by fault flexure structure,and the fault block structure is unfavorable for oil/gas pool-forming because of its top opening caused by top tensional fracture.

关 键 词：构造演化 构造特征 构造圈闭 地层接触关系 地震勘探 地震反射 油气聚集 当阳 

分 类 号：P631.4[天文地球—地质矿产勘探] P618.130.8[天文地球—地质学]