渤海海域新生代断裂发育特征及形成机制  

Characteristics and formation mechanisms of the Cenozoic faults in the Bohai Sea waters

作　　者：余一欣[1,2] 周心怀[3] 徐长贵 吕丁友 魏刚 王桂华 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油大学盆地与油藏研究中心,北京102249 [3]中海石油(中国)有限公司天津分公司,天津300452 [4]中国石油集团测井有限公司长庆事业部解释中心,陕西西安710201

出　　处：《石油与天然气地质》2011年第2期273-279,共7页Oil & Gas Geology

基　　金：国家自然科学基金项目(40802030);中海油天津分公司科技攻关项目(S10TJTMM016)

摘　　要：断裂是渤海海域油气成藏的主控因素之一,利用地震剖面解释和构造编图成果,对渤海海域新生代断裂发育特征及形成机制进行了分析。渤海海域主要发育伸展断裂和走滑断裂,局部地区发育反转断裂。在平面上主要呈NE,NW和近EW向展布,其中NE向断裂多属于郯庐走滑断裂带的组成部分,在剖面上表现出花状构造特征。NW向断裂主要与张家口-蓬莱走滑断裂带有关,并与NE向断裂发生了相互剪切作用,共同构成了渤海地区新构造期的共轭剪切破裂系统。近EW向断裂可分为两类:大型近EW向断裂带多构成南部地区凸起和凹陷的分界断裂,经历了早期伸展和晚期走滑作用的叠加,在剖面上多表现为铲式主干正断层和浅层走滑分支断层相组合的似花状特征;浅层密集发育的小型近EW向断裂多是受郯庐断裂带走滑作用影响而形成的派生断裂。Fault is one of the major factors that control hvdroearbon accumulation in the Bohai Sea waters. Based on seismic interpretation and structural mapping, this paper focuses on the characteristics and tormation mechanisms of the Cenozoic faults in the Bohai Sea waters. In the study area, extensional and strike-slipping faults are the most predominant, and inverted faults are locally distributed. On plane view, most of the faults are of NE-, NW- or EW-trend, and the NE-trending taults mostly belong to the Tanlu strike-slip faut zone. While on sec- tional view, the faults occur as flower structures. The NW-trending faults are associated with the ZhangjiakouPenglai strike-slip fault zone, and constitute a conjugate shear faults system with the NE-trending faults during the neotectonic stage. The near EW-trending faults can be classified into two types according to their scale. The large-scale EW-trending faults, acting as the boundary faults between the salient and trough in the southern part, experienced the early extensional and late strike-slipping movements. They exhibit quasi-flower structures composed of major listric faults and shallow branching strike-slipping fautts on the section. The small-scale EWtrending faults are densely developed in the shallow strata, and they are mostly derivalive faults resuhed flom the strike-slipping movement of the Tanlu fault zone.

关 键 词：形成机制 伸展断裂 走滑断裂 新生代 渤海海域 

分 类 号：TE121.1[石油与天然气工程—油气勘探]