海安凹陷断裂特征与构造样式  

Fracture characteristic and structural style in Haian Depression

作　　者：杨小军[1] 季红军[1] 刘俊成 张弛 韦祥 Yang Xiaojun;Ji Hongjun;Liu Juncheng;Zhang Chi;Wei Xiang(Geophysics Research Institute of Jiangsu Oilfield Company,SINOPEC,Nanjing 210046)

机构地区：[1]中国石化股份有限公司江苏油田分公司物探研究院,江苏南京210046

出　　处：《石化技术》2023年第11期113-115,100,共4页Petrochemical Industry Technology

基　　金：江苏石油勘探局(JS22001-3)。

摘　　要：海安凹陷断裂复杂,构造多解性强、落实难度大,以地质模式为指导是提高构造解释精度的重要手段。构造样式是同一期构造运动、在同一应力环境下所产生的构造变形组合,是构造解释地质模式建立的基础。以基底构造和成盆期应力场研究为基础,分析区域构造特征及形成演化机制,总结海安凹陷结构及断裂特征;综合不同基底断裂特征、盆地性质和盆地结构特征分析,开展海安凹陷构造样式特征研究。研究表明:海安凹陷结构、断裂特征及构造样式具有典型分区性,海中断隆以北为南断北超的半地堑结构,断裂走向NEE、NNW倾为主,主要发育走滑构造样式;海中断隆以南为北断南超的半地堑结构,断裂走向近EW、S倾为主,主要发育伸展构造样式。The fractures of the Haian Depression are complicated,with strong structural diversity and great difficulty in implementation.Guided by geological models,it is an important means of improving the accuracy of structural interpretation.Structural style is a combination of structural deformation produced by the same period of tectonic movement under the same stress environment,which is the foundation for establishing geological models for structural interpretation.Based on the study of the basement structure and stress field during the basin-forming period,the regional structural characteristics and evolution mechanism are analyzed,and the structural and fracture characteristics of the Haian Depression are summarized.Through a comprehensive analysis of the different basement fracture characteristics,basin properties,and basin structures,the structural style characteristics of the Haian Depression are studied.Research has shown that the structure,fracture characteristics,and structural styles of the Haian Depression have typical regionalization.To the north of the Haizhong Fault Uplift,there is a semi-graben structure with faulting in the south and overlapping in the north,dominated by a NEE strike and a NNW tendency of fractures,and mainly developing a strike-slip structural style.To the south of the Haizhong Fault Uplift is a semi-graben structure with faulting in the north and overlapping in the south,dominated by a near EW strike and an S tendency of fractures,mainly developing an extensional structural style.

关 键 词：海安凹陷 基底构造 断裂特征 构造样式 构造解释 

分 类 号：P61[天文地球—矿床学]