辽东湾坳陷断裂差异变形定量研究

辽东湾坳陷是渤海湾盆地重要的油气产区，郯庐断裂带在该区穿过，新生代期间发育丰富的伸展、走滑及伸展-走滑复合构造变形体系，且断裂变形具有明显的差异性。本申请拟从辽东湾坳陷断裂构造分析入手，综合使用丰富的井震数据，基于SKUA-GOCAD平台，建立主要断裂系统的三维构造模型，定量研究主干断裂的三维几何学形态及其空间差异展布特征；利用断层活动史综合分析和磷灰石裂变径迹定年结果，获得主干断裂活动时限与期次；通过构造物理模拟实验，明确主干断裂差异变形的动力学因素与过程，揭示伸展-走滑复合构造变形区断裂差异变形的动力学机制，建立断裂差异变形的动力学成因模型。研究结果对辽东湾地区构造演化与油气地质勘探起到举足轻重的作用，同时可以深化和完善郯庐断裂带构造活动与盆地演化的耦合关系认识，具有重要理论意义与科学意义。

The Liaodong Bay Depression is a narrow rift zone that is located in the northeast direction of the northern Bohai Bay Basin，which is one of the important oil and gas production base. The Tan-Lu Fault Zone passes through the area，there were abundant and typical extensional, strike-slip and the composite deformation system of strike-slip and extension, and there were significant differential faulting. Based on SKUA-GOCAD platform, this application intends to establish a three-dimensional structural model of the main fault system, and quantitatively study the three-dimensional geometry form and spatial distribution characteristics of the main fault, starting from the analysis of faults in the Liaodong Bay Depression, and comprehensively using abundant well-seismic data. Based on the comprehensive analysis of fault activity history and apatite fission track dating results, the time limit and times of main fault activity are obtained. Through the structural physical simulation experiment, the dynamic factors and process of differential deformation of main faults are clarified, the dynamic mechanism of differential faulting in the composite deformation system of strike-slip and extension area is revealed, and the dynamic genetic model of differential faulting is established. The research results play an important role in the tectonic evolution and hydrocarbon geological exploration in the Liaodong Bay Depression. At the same time, it can deepen and improve the understanding of the coupling relationship between basin evolution and tectonic activity of the Tan-Lu Fault Zone, which has important theoretical and scientific significance.