惠民凹陷西部断层活动性研究

Research on Fault Activity in the West of Huimin Depression

根据断层规模和对构造、沉积及油气的控制作用,将惠民凹陷西部的断层划分为4个级别。为准确地分析断层活动的时间和强度,利用断层活动速率分析了惠民凹陷西部断层活动性。结果表明,沙三段、沙二段沉积时期二、三级断层活动强烈。区内断层活动具有幕式的特点,其中第一幕为沙三段沉积期,第二幕为惠民期,第三幕为明化镇组沉积期到现今,其中第三幕断层的活动强度小,与馆陶组期相比较接近。

Based on the fault size and the controlling structure of deposition and oil and gas,the fault in the west of Huimin Depression was classified into 4 grades.According to the accurate time and strength of the fault activities,the fault activity was analyzed by moving rate index.The result shows that the fault activates are strong in Es3,E1s2,and the fault activity is episodic,the 1st episodic is Es3 the 2nd is Eh,the 3rd is Em and continues to the present situation,of which the 3rd episodic fault strength is little,and similar to the Eg.