渤海湾盆地区燕山期构造特征与盆地转型  

Structural characteristics and basin transformation in the Bohai Bay basin in the Yanshan era

作　　者：李伟[1] 吴智平[1] 赵文栋 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,青岛266555 [2]中国石油集团渤海钻探工程有限公司,天津300457

出　　处：《地球物理学进展》2010年第6期2068-2077,共10页Progress in Geophysics

基　　金：教育部高等学校博士学科点新教师基金项目(K0901045A);全国油气资源战略选区调查与评价项目:华北上古生界油气资源战略选区(2009-GYXQ17);中国石油大学(华东)引进人才科研基金项目(Y070124)联合资助

摘　　要：以各种地震资料的分析解释、构造解析为基础,对燕山期渤海湾盆地区构造特征与盆地转型过程进行了研究.结果表明:燕山早期渤海湾盆地区以挤压褶皱及逆冲断裂发育为主,在太行山以东、盐山—歧口—兰聊断裂以西地区主要展布方向为NE和NNE向,整体具有西强东弱的特征,在盐山—歧口—兰聊断裂以东的济阳坳陷区,以NW(W)向的逆冲断层发育为主;燕山中期研究区以伸展构造发育为主,在太行山以东、盐山—歧口—兰聊断裂带以西地区断层展布方向主要为N(N)E向,盐山—歧口—兰聊断裂带以东、郯庐断裂带以西、张家口—蓬莱断裂带以南地区主要发育NW(W)向负反转断层,张家口—蓬莱断裂带以北地区以N(N)E向断裂发育为主;燕山晚期以正反转断层及新生逆冲断层发育为主.燕山期渤海湾盆地区发生了三次重要的盆地转型,燕山早期由印支期的挤压隆升剥蚀转型为山间坳陷盆地,燕山中期由山间坳陷转型为强烈的陆内断陷盆地,燕山晚期由陆内断陷盆地转为隆起区遭受剥蚀.区域构造背景的转变是燕山期渤海湾盆地区转型的主控因素,不同构造期盆地的叠加改造造成了研究区前第三系油气地质条件的复杂性和多样性.Based on interpretation of various seismic data and structural analysis, the structure characteristics and basin transformation in the Bohai Bay basin in the Yanshan era are studied. The results show that in the early stage of the Yanshan era compressional folds and thrust faults developed in this basin. The main directions were NE and NNE in the area between the Taihang Mountains and Yanshan- Qikou-Lanliao fault, and developed intensively in the east and weakly in the west. While in the Jiyang depression east of Yanshan-Qikou-Lanliao fault, most of the thrust faults were NW（W）trending. gxternsional structures developed in this area in the middle stage of the Yanshan era, the faults between the eastern Taihang Mountains and the western of Yanshan-Qikou-Lanliao fault zone trends N（N）E. The NW（W）trending negative inversion faults developed in the area among the eastern Yanshan-Qikoi-Lanliao fault zone,the western of Tanlu fault and the southern of Zhangjiakou-Penglai fault zone. Further more,the faults in the north of the Zhangjiakou-Penglai fault zone were N（N）E trending. In the late stage of the Yanshan era, positive inversion faults and palingenetic thrust faults developed. The Bohai Bay basin experienced three significant transformations during the Yanshan era, the basin of uplift,extrusion and ablation in Indo-China era transformed in to an intermountain depression in the early stage of the Yanshan era, then turned into intensive continental fault basin in the middle stage of Yanshan era, finally changed into denudation of the uplift in the late stage of Yanshan era. The change of regional tectonic background is the main controlling factor of the transformation of the of Bohai Bay basin in the Yanshan era. The superposition and alteration of different structural stages led to complicated and multiple hydrocarbon geological conditions of pre-Paleogene.

关 键 词：构造特征 盆地转型 燕山期 渤海湾盆地区 

分 类 号：TE121[石油与天然气工程—油气勘探]