塔中中古8井区走滑断裂特征及其对孔洞型油气藏的控制作用

Characteristic of strike-slip fault and its control effect on the fractured-vuggy carbonate reservoirs in ZG-8 well area

塔里木盆地塔中地区奥陶系碳酸盐岩地层内发育大量的走滑断裂,是碳酸盐岩孔洞型储层发育及油气聚集的重要控制因素。走滑断裂在剖面上表现为花状特征,在平面上表现为线状、花状、辫状、马尾状等多种组合样式的特征,其形成的走滑断裂带在横向上具有分区特征,不同区内走滑断裂的组合样式及应力特征也各不相同。这些特征造成了碳酸盐岩孔洞型储层发育的差异性,以及孔洞型油气藏油气富集程度的差异性。通过对研究区内断裂进行精细的解剖,明确了塔中中古8井区走滑断裂的基本特征,以及走滑断裂对孔洞型储层、油气藏的控制作用,对塔中孔洞型油气藏的勘探和开发具有一定的参考意义。

A large number of strike slip faults developed in the Ordovician carbonate rocks in the central parts of the Tar- im basin. It is an important controlling factor of the fractured vuggy carbonate reservoir. There are many different combina- tion patterns of strike slip faults on the plane and section,it is found that the strike slip faults system can be divided into several different zones in the plane, the combination patterns and stress characteristics of strike slip faults in each zones are different,These characteristics results in the difference of the development of fractured vuggy reservoirs, and the difference of hydrocarbon accumulation in the fractured vuggy reservoirs. Through the study,we have mastered the basic characteristics of strike slip faults and its control effect on the fractured vuggy carbonate reservoir in ZG 8 well area.