【摘要】 本文通过三维地震资料建立了廊固凹陷的三维精细地质结构。通过重建三维地质结构,可以更为直观的显示其真实地质结构形态。对廊固凹陷三维地质结构的分析表明,认为廊固凹陷新生代以来经历多期构造活动,形成了上、中、下3个构造层:下构造层为孔店组—沙四段,为裂陷初始期沉积;中构造层为沙三段—东营组,为强烈裂陷期沉积;上构造层为明化镇组—馆陶组,为坳陷期沉积。每个构造层的构造变形不相同。廊固凹陷构造比较复杂,根据规模及活动强烈程度可将其分为3级:Ⅰ级为控凹断层—大兴断层;Ⅱ级为控带断层,主要有桐柏镇断层、河西务断层以及旧州断层;Ⅲ级为控藏断层包括琥珀营、王居、杨税务、刘其营、半截河等断层。根据一级、二级断层,可以将廊固凹陷分为5个构造带与一个洼槽。更多还原

【Abstract】 This paper has built the 3D fine geological structure which can show the real geological structure morphology directly by using 3D seismic data.After the analysis of 3D geological structure of Langgu sag,we think that Langgu sag has experience several tectonic movement after Cenozoic,so there are three structure layers;Lower structure layer is Kongdian Formation-the fourth Shahejie Formation at which time is chasmic beginning;Middle structure layer is the third Shahejie Formation-Dongying Formation at which time is strongly chasmic stage;Upper structure layer is Minghuazhen Formation-Guangtao Formation at which time is depression stage.The structure deformation of each structure layer is different.The structure of Langgu sag is complicate,and according to the scale,we divided into three grades:Grade One is sag-control fault which is Daxing fault;Grade Two is zone-control fault including Tongbaizhen fault,Hexiwu fault and Jiuzhou faul;Grade Three is reservoir-control fault including Hupoying fault,Wangju fault,Yangshuiwu fault,Liuqiying fault and Banjiehe fault,and so on.According to Grade One and Grade Two faults,Langgu sag can be divided into five structure zones and one low-trough.更多还原