【摘要】 通过地震物探对渤海湾盆地黄河口凹陷中央隆起带进行研究。中央隆起带主要发育NE、NEE和近EW向断裂,其中NE向断裂为走滑主断裂,在深部断续出现;NEE和近EW向断裂为走滑派生断裂,呈雁行排列。走滑主断裂由深到浅在走向上表现出不连续性和活动强度的不一致性。断裂表现为典型的负花状构造,显示走滑作用特征。剖面解释显示,古近纪断裂带以伸展作用为主,走滑作用不明显;新近纪以来右行走滑作用逐渐增强,并在新构造运动时期达到顶峰,形成了近东西展布的雁列式断裂组合,奠定了现今的中央隆起带的构造格局。中央隆起带临近烃源岩,油气运移距离短,是油气聚集的优势区。更多还原

【Abstract】 Detailed field research on seismic sections of the central uplift belt of the Huanghekou Sag,Bohai Bay Basin,revealed that faults in the region largely extend in three directions(NE–SW,NEE–SWW,and E–W).The primary faults are strike-slip faults that extend NE–SW.The secondary faults striking NEE–SWW and E–W are derived from strike-slip faults,and show an en-echelon pattern.The primary faults are discontinuous with depth,and the intensity of activity varies along the depth profile.In cross-section,these faults appear as negative flower structures that are typical of strike-slip deformation.The cross-sectional structure indicates that the fault zone was dominated by an extensional regime in the Paleogene,when strike-slip activity was minimal.In the Neogene,right-lateral strike-slip motion gradually increased.Strike-slip motion has reached a peak in the current tectonic period,forming the en-echelon fault sets and building the central uplift belt.The faults of the central uplift belt create short hydrocarbon migration routes from the adjacent rocks,in which hydrocarbons accumulate.更多还原