东濮凹陷唐庄三维工区断层产状变化的控制因素

东濮凹陷发育有NNE和NNE-NE走向的两大断裂系统,唐庄地区为NNE-NE走向的断裂系统。该区断层产状沿走向变化频繁,在短短的20km范围内,出现了6个彼此倾向相反的断裂带。NNE向断裂系统主要受张扭应力作用控制;而NNE-NE向断裂系统主要受边界条件、沉积相带、区域张应力的控制。唐庄地区彼此倾向相反的断裂系统的控制因素主要是区域地质演化环境、构造背景、边界条件、断块体的抬斜旋转与差异升降及岩性岩相变化等。在上述诸因素的作用下,发育了彼此倾向相反的断裂带。

Factors controlling the fault occurrences in Tangzhuang three-dimensional exploration area in Dongpu depression.

There are NNE and NNE-NE fault systems in the Dongpu depression. The NNE-NE fault system exists in Tangzhuang area. In this area,fault occurrence changes frequently,so that in 20km extent there occur 6 fault zones whose dip directions are opposite each other. The NNE fault system is mainly controlled by tension-torsional stress, and the NNE-NE fault system by these factors:boundary condition,sedimentary facies zone and regional tensional stress.The factors controlling Tangzhuang fault zones whose dip directions are oppo site each other are evolution environment of regional geology,structure background, boundary condition, lithology and rock fades variations, as well as the tilting-turning and differential uplifting of faulted blocks, etc. In other words, these opposite fault zones were caused by the above factors.