塔里木盆地塔中地区油气运移输导体系研究  

Petroleum migration pathway system of Tazhong area in Tarim Basin

作　　者：赵勇生[1] 刘克奇[2] 

机构地区：[1]中国科学院广州地球化学研究所 [2]胜利油田有限公司东辛采油厂,山东东营257094

出　　处：《中国石油大学学报（自然科学版）》2007年第4期8-13,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'973'重点基础研究发展规划项目(G1999043309)

摘　　要：构成塔中地区输导网络格架的输导体包括断裂、不整合面、裂缝和孔隙等。利用分形方法,对塔中地区4个重要构造面的断裂体系进行了分形研究。结果表明,塔中地区下奥陶统顶(Tg5′)的分形维数最高,为1.39;其次是寒武系膏盐岩层顶(Tg7),为1.24;最小的是石炭系生屑灰岩顶(Tg2″),为1.05。按其流体运动特点,塔中地区不整合面上、下输导体分属于两个不同的流体流动场,不整合面以下输导体主要由孔-洞-缝体系构成;不整合面以上输导体为层状渗透体,在大多数情况下属于孔隙型介质。根据塔中地区输导网络的特征,提出了以限制性横向输导为主的输导网络和以非限制性纵向输导为主的输导网络的分类方案。Petroleum migration pathway system, which is the link between source rock and trap, is the key factor of petroleum accumulation system. The migration pathway network in Tazhong area is composed of faults, unconformities, fractures, and pores. The four fault systems were studied by fractal method. The results show that the fault system is self-similar within a certain scale range. The fractal dimension of Tg7, Tg5′, Tg5 and Tg2″ is 1.24, 1.39, 1.09 and 1.05 respectively. There are two different fields of fluid flow above and under the unconformities in terms of the characteristics of fluid flow in Tazhong area. The migration pathway under the unconformity is mainly composed of pores, caves and fractures where the flow regularities are complicated. While the migration pathway above the unconformity mainly consists of pores where the fluid flow can be characterized by Darcy＇s law. There are limited lateral migration network and unlimited vertical migration network in Tazhong area.

关 键 词：塔里木盆地 塔中地区 断裂 不整合 输导体系 

分 类 号：TE122.3[石油与天然气工程—油气勘探]