摘要
下扬子海陆域新生代沉积盆地是中国东部主要含油气盆地之一,成盆断裂特征与活动规律是该区油气勘探研究的基础。文章基于高覆盖率的地震勘探测线,以构造断裂解析为突破口,探究盆地断裂的变形特征与活动规律。依据断裂组合样式与构造活动特征,断裂可分为伸展、走滑、挤压—反转三种样式,构造活动分为伸展断裂与伸展—走滑断裂两种构造体系。成盆断裂显著受控于郯庐断裂右行走滑变形,主要与郯庐断裂带不同构造走向的区段位置和与郯庐断裂带的距离这两个因素或变量有关,盆地断裂呈现了"东西有别,中部不同"的特点。下扬子区新生代多变应力场,控制着作为油气运移通道断裂的开闭状态,是油气资源评价的重要依据。
The Cenozoic sedimentary basins cluster in the onshore and offshore Lower Yangtze region are representative of the petroliferous province in eastern China,in which the characteristics and activity rules of faults are key foundation for the study of petroleum exploration.In this study,we address the deformation characteristics and activity rules of fault by using structural fault analyses based on high-coverage seismic prospecting data.Results show that the faults can be classified into three types based on the style of fault assemblage,i.e.,extended,strike-slipped and extruded-reversed.According to the characteristics of fault activity,the basinal faults can be divided mainly into two structural systems,i.e.,extensional and combined extensional with strike-slip.Tectonically,the basinal faults were prominently controlled by the dextral deformation of the Tan-Lu fault,and their structural activities are related to the reqional location and the distance to the Tan-Lu fault.The basinal faults are characterized by apparent division between the east and the west and unique in the central.The varied stress field of the Lower Yangtze region during the Cenozoic controls the opening and closing of the fault as oil and gas migration pathway.This is an important criteria for the evaluation of oil and gas resources.
作者
徐曦
孙连浦
肖梦楚
李筱
朱晓颖
高顺莉
XU Xi;SUN Lianpu;XIAO Mengchu;LI Xiao;ZHU Xiaoying;GAO Shunli(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China;School of Ocean and Earth Science,Tongji University,Shanghai 200092,China;School of Earth Sciences,Zhejiang University,Hangzhou 310058,China;Sino Getech(Beijing)Science&Technology Co.,Ltd.,Beijing 100015,China;Shanghai Branch of CNOOC China Ltd.,Shanghai 200030,China)
出处
《高校地质学报》
CAS
CSCD
北大核心
2018年第5期723-733,共11页
Geological Journal of China Universities
基金
羌塘及塔里木等盆地航空物探调查(121201003000172001)
国家科技重大专项项目(2011ZX05023-003)联合资助
关键词
下扬子
苏北-南黄海盆地
断裂构造
断裂活动
Lower Yangtze region
Subei-South Yellow Sea Basin
fault structure
fault activity
作者简介
徐曦,男,1986年生,博士,工程师,主要从事含油气盆地构造与油气评价研究;E-mail:winbreak@163.com;通讯作者:孙连浦,男,1970年生,博士,首席研究员,主要从事含油气盆地构造与油气评价研究;E-mail:sunlianpu@hotmail.com。
