塔里木盆地塔中地区断裂分形特征  

Fractal analysis of fault system in Tazhong area,Tarim Basin

作　　者：徐兵[1] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2007年第4期35-37,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家重点基础研究发展规划"973"项目"中国典型叠合盆地油气形成富集与分布预测"(G1999043309)

摘　　要：断裂是油气运移的重要通道,且具有明显的分形结构特征。利用分形方法,对塔里木盆地塔中地区4个重要构造面即Tg7(寒武系膏盐岩层顶),Tg5′(下奥陶统顶),Tg5(奥陶系顶)和Tg2″(石炭系生屑灰岩顶)的断裂体系进行了分形分析。在4个构造面中,Tg5′的分形维数最高,其次是Tg7,Tg2″的分形维数最小。研究结果表明,下奥陶统顶面断裂体系最发育,下奥陶统顶面的流体渗透性要强于其他几个界面。Faults are the key pathway of petroleum migration.The fault system is self-similar within a certain scale range.The four structural surfaces,Tg7,Tg5',Tg5,and Tg2' which is the top of the Cambrian gypsum and salt rock layer,the top of lower Ordovi-cian,the top of Ordovician,and the top of Carboniferous bioclas-tic limestone respectively,are quantitatively studied by means of fractal analysis.The fractal dimension of Tg7,Tg5',Tg5,and Tg2' is 1.24,1.39,1.09,and 1.05 respectively.The fault system on the top of lower Ordovician is mostly developed and its permeability is higher than other structural surfaces.

关 键 词：断裂 分形 塔中地区 塔里木盆地 

分 类 号：TE111.2[石油与天然气工程—油气勘探]