伸展断层相关褶皱恢复方法及应用

Recovery methods and application of extensional fault-related folding

 任启强¹ 戴俊生¹ 徐珂¹ 商琳² 王硕¹ 刘超¹

中国石油大学（华东）地球科学与技术学院，山东 青岛 266580 中国石油冀东油田研究院，河北 唐山 063004

School of Geosciences, China University of Petroleum, Qingdao 266580, China Research Institute of Exploration and Development, Jidong Oilfield Company, PetroChina, Tangshan 063004, China

 近年来，断层相关褶皱逐渐引起学者们的重视，众多学者对其几何学和运动学的模型进行了大量的研究。文中在研究断层相关褶皱形成原理的基础上，系统分析了不同类型断层相关褶皱的恢复手段，特别是对伸展作用断层的相关褶皱进行恢复，并应用于具体实例中。文中重点采用斜剪切方法对构造成因比较复杂的南堡凹陷3号构造进行三维构造恢复，模型从上到下主要包括Ed1，Ed2，Ed3，Es1和Es2等5套地层，对比模型恢复前后的差异，判断出南堡3号构造地区经历的构造环境。恢复方法在南堡凹陷3号构造的应用，表明斜剪切、恢复到基准面等恢复手段对伸展作用下的断层相关褶皱具有可行性，斜剪切是其中最为主要的恢复手段。

 In recent years, researchers attach more importance to the fault-related folding, and have done a lot of research on the geometry and kinematics model. This paper tried to analyze the restoration methods for different types of fault-related folding, especially for the extensional fault-related folding on the basis of the formation principle, and apply the methods to concrete examples. By using inclined shear method to restore the complicated No.3 structure in Nanpu Sag, a 3D geological model which contains five sets of stratum(from top to bottom: Ed1, Ed2, Ed3, Es1, Es2) is established. Compared the model before with after restoration, the tectonic environment is judged during the evolution of No.3 tectonic location. The application shows that inclined shear and restore to a datum are the main methods for extensional fault-related folding, and the inclined shear is the most common method.

10.6056/dkyqt201505007