渤海湾盆地板桥凹陷构造演化特征及油气地质意义  

Structural evolution characteristics and petroleum geological significance of Banqiao Sag in Bohai Bay Basin

作　　者：马钰凯 肖鄂[1] 孙永河 王海学[3,4] 李杰[1] 宁波 MA Yukai;XIAO E;SUN Yonghe;WANG Haixue;LI Jie;NING Bo(Research Institute of Exploration and Development,Yanchang Oilfield Company Limited,Yan'an,Shaanxi 716000,China;School of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Laboratory of CNPC Fault Controlling Reservior,Northeast Petroleum University,Daqing,Heilongjiang 163318,China)

机构地区：[1]延长油田股份有限公司勘探开发技术研究中心,陕西延安716000 [2]重庆科技学院石油与天然气工程学院,重庆401331 [3]东北石油大学地球科学学院,黑龙江大庆163318 [4]东北石油大学“断裂控藏”CNPC重点实验室,黑龙江大庆163318

出　　处：《东北石油大学学报》2023年第6期24-37,I0002,I0003,共16页Journal of Northeast Petroleum University

基　　金：中国石油科技创新基金项目(2020D-5007-0108);黑龙江省优秀青年人才项目(140119002)。

摘　　要：板桥凹陷位于渤海湾盆地东部,断裂发育特征较为复杂。基于地震解释资料,根据断裂活动特征及构造演化史恢复,明确板桥凹陷主干断裂几何学特征及活动过程,分析断层形成演化模式;根据砂箱物理模拟实验结果,验证先存主干边界断层几何形态对后期构造变形特征的控制作用。结果表明:板桥凹陷构造演化遵循“断陷—断坳—坳陷”的演化序列;新生代,区域伸展方向逐渐由NW—SE向过渡为SN向,新生界断裂优势走向从NE向逐渐转变为近EW向。板桥凹陷于沙河街组三段—二段、沙河街组一段—东营组、馆陶组—明化镇组沉积时期发生3期断裂活动,分别对应裂陷Ⅰ幕、裂陷Ⅱ幕和后裂陷期。板桥凹陷伸展变形过程符合铲式断层主控下的多期次构造演化模式,上盘地层在多期演化后可划分为地层旋转区、裂陷区和斜坡区。该结果对研究区下一步油气勘探开发具有指导意义。Banqiao Sag is located in the eastern part of Bohai Bay Basin,and the development characteristics of faults in the sag are complicated.Based on the seismic interpretation data,through the analysis of fault activity characteristics and the restoration of structural evolution history,the geometric characteristics and activity process of the main fault in Banqiao Sag are clarified,the formation and evolution mechanism of the fault is analyzed.The control effect of the geometric form of the boundary fault of the previous main fault on the later structural deformation characteristics is verified by the sandbox physical simulation experiment.The results show that the structural evolution of Banqiao Sag follows the evolution sequence from rift structure to rift-depression structure and then to depression structure.The regional extension direction gradually changed from NW-SE to SN in the Cenozoic,resulting in the gradual change of the dominant Cenozoic fault trend from NE-oriented to EW-oriented.In Banqiao Sag,three stages of fault activity occurred in the sedimentary stage of Sha-3 Member and Sha-2 Member,the sedimentary stage of Sha-1 Member and Dongying Formation,and the sedimentary stage of Guantao Formation and Minghuazhen Formation,corresponding to the first stage of rifting,the second stage of rifting and the post-rifting stage respectively.The physical simulation experiment of sandbox can confirm that the extensional deformation process of Banqiao Sag conforms to the multi-stage tectonic evolution model dominated by listric faults.The hanging wall strata can be divided into rotation region,rift region and slope region after multi-stage evolution.The research results have guiding significance for the next oil and gas exploration and development in the study area.

关 键 词：渤海湾盆地 板桥凹陷 构造演化 断层活动性 砂箱物理模拟实验 

分 类 号：TE122.2[石油与天然气工程—油气勘探]