黄河口凹陷新生代断裂体系与构造演化

发布时间：2018-09-07 07:03

【摘要】：针对黄河口凹陷新生代断裂体系与构造演化尚不明确的问题,运用三维地震资料、剖面特征分析和水平相干切片分析相结合的手段,研究了黄河口凹陷新生代断裂体系与构造演化发育规律。结果表明:新生代以来,受多期构造运动的影响,研究区断裂体系具有多方向、多性质、多期次叠加复合特征——"三三特征",即3组优势方向断裂、3种断裂性质、3期构造演化;凹陷发育近EW向(NWW向)、NNE向(近SN向)、NE向3组优势方向断裂,近EW向和NE向断裂为拉张或走滑-拉张性质断裂,NNE向断裂为走滑性质断裂;盆地具有典型的断陷与坳陷叠置结构;可划分为3个构造演化期次,即E_2k—E_(2s_4)早期裂陷阶段、E_(2s_3)—E_3d裂陷伸展阶段和N_1g—Qp裂后拗陷阶段。该研究对黄河口凹陷后续油气勘探具有重要的指导意义。
[Abstract]:In order to solve the problem that the Cenozoic fault system and tectonic evolution in Huanghe sag are not clear, the method of combining 3D seismic data, profile characteristic analysis and horizontal coherence slice analysis is used. The Cenozoic fault system and tectonic evolution in Huanghekou sag are studied. The results show that since the Cenozoic, the fault system in the study area has many directions and properties under the influence of multiple tectonic movements. The multi-stage superimposed composite characteristics-"three and three characteristics", are three groups of dominant direction faults and three types of fault properties and three stages of tectonic evolution, and the depression is characterized by three groups of dominant faults in the near EW direction (NWW direction) and the NNE direction (near SN direction) and the three groups of NE trending faults in the sag. The near EW and NE trending faults are extensional or strike-slip extensional faults and NNE-trending faults are strike-slip faults, the basins have typical fault-depression superimposed structures, and can be divided into three tectonic evolution stages. That is, E2k-E _ (2s_4) early rift stage, E _ (2s_3) -E _ P _ 3 _ D rift extension stage and N_1g-Qp post-rift depression stage. This study is of great significance for the subsequent oil and gas exploration in the Huanghe Depression.
【作者单位】：中国石油大学(华东);
【基金】：“十二五”国家科技重大专项“近海大中型油气田形成条件与分布”(2011ZX05023-006)
【分类号】：P618.13

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