摘要
中国东部发育多个中新生代断陷盆地,长期处于构造伸展环境中,难以形成挤压构造样式。笔者根据高精度三维地震数据,在苏北盆地陈堡地区精细解析出一条走滑逆断层,结合生长指数法分析断层活动性,并明确其成因机制。研究表明,陈堡走滑逆断层走向近EW,倾向为S,倾角大于70°,呈高角度向南倾斜,错断了T^(3)_(2)、T^(3)_(3)和T^(4)_(0)等主要反射层,表现为同沉积断层,其主要活动时期为阜宁组时期,阜三段时期活动性最强,该断层的形成与区域构造背景有关,属于走滑诱导和重力滑动共同成因。陈堡走滑逆断层对烃源岩形成、油气运移、圈闭发育都具有控制作用,认为陈9断块发育有利圈闭,勘探潜力大。
Many Meso-Cenozoic rift basins developed in eastern China,which is difficult to form the compressional structural style.This paper studies a strike-thrust fault in Chenbao oilfield of Subei Basin and analyzes its geometric characteristics and forming mechanism based on high quality 3-D seismic data.It is shown that the reflections of T^(3)_(2),T^(3)_(3),T^(4)_(0) were cutted by the strike-thrust fault,which strike to EW and incline to south with a high angle.The main activity periods of the strike-thrust fault were E1f era.The strike-thrust fault was formed by slide gravity and strike induction under its deep background.The source rocks,hydrocarbon migration and traps were strongly affected by the strike-thrust fault.The oil trap of Chen9 block has been evaluated as an important petroleum potential.
作者
王正
吴林
陈清华
程祥
WANG Zheng;WU Lin;CHEN Qinghua;CHENG Xiang(Beijing Scanpower Co.,Ltd,Beijing 100101,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;School of Geosciences,China University of Petroleum,Qingdao 266580,Shandong,China)
出处
《西北地质》
CSCD
北大核心
2021年第3期206-212,共7页
Northwestern Geology
基金
国家自然科学基金“塔北古隆起形成时间研究:来自锆石U Pb年代学和超深层楔形结构的限定”(41902158)资助。
作者简介
王正(1984),女,工程师,2009年获中国石油大学(华东)硕士学位,长期从事地质综合研究及地质建模相关研究工作。E-mail:119946998@qq.com;通讯作者:吴林(1987),男,高级工程师,2015年获中国石油大学(华东)博士学位,长期从事含油气盆地构造解析相关研究工作。E-mail:19534644@qq.com。
