南阳凹陷南部边界大断裂活动性及其对沉积的控制

针对南阳凹陷地层发育的特点,运用断层活动速率的方法分析边界断层的活动历史,认为断层活动在时间上经历了最弱—增强—最强的变化,在空间上活动强度最大的部位发生了迁移,同一时期不同部位活动强度差异明显,并结合沉积相的展布初步探讨了断层活动对沉积的控制作用.

Activities of the boundary major fault in the south of Nanyang Sag and their control effect on deposition

It is important for petroleum exploration to accurately analyze the period and intensity of fault activity.According to the development features of the strata in Nanyang Sag,the activity history of the boundary fault are analyzed by means of fault activity rate.It is shown that during the development of the fault,the activity intensity of the boundary fault becomes gradually strong:from weak to strong to the strongest.In space,the activity intensity of different parts is obviously different,and the location with the greatest activity intensity changes.According to the analysis of the plane graph of sedimentary facies and the activities of the fault,it is held that the activities of the fault have obvious control effect on deposition,there is good response relation between them.