基于储层分类计算东海低渗致密储层渗透率  

Permeability calculation based on reservoir classification for low permeability tight reservoirs in East China Sea

作　　者：高颖 高楚桥[1,2] 赵彬[1,2] 黄涛梅 GAO Ying;GAO Chuqiao;ZHAO Bin;HUANG Taomei(School of Geophysics and Oil Resources,Yangtze University,Wuhan 430100,China;MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Wuhan 430100,China)

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100 [2]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100

出　　处：《断块油气田》2019年第3期309-313,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项课题“东海深层大型气田勘探评价技术”(2016ZX05027-002)

摘　　要：东海低渗致密储层的岩性及孔隙结构复杂,物性非均质性强,采用传统的岩心孔渗回归方法会导致渗透率计算误差较大。为解决这一问题,在研究低渗致密储层渗透率控制因素的基础上,发现流动单元指数FZI能较好地划分储层类型,基于FZI理论利用累积频率划分方法将研究区储层划分为4类,建立各类储层精细模型;通过对FZI反映灵敏的常规测井曲线特征进行分析,优选出深浅电阻率的比值、自然伽马与密度比值和纵波时差,建立FZI的多参数拟合方程,并将其应用到非取心段的渗透率评价中。应用结果表明,计算渗透率与岩心分析数据吻合较好,且在孔隙结构复杂取心段仍有较好应用效果,为低渗致密储层的精细评价提供了理论依据。Because of the complex lithology and pore structure and the strong heterogeneity of physical properties in the low permeability tight reservoir in the East China Sea,the calculation error of permeability is very large by using traditional calculation method.In order to solve this problem,the controlling factors of permeability in low permeability and tight reservoir are studied,and the flow unit index FZI is determined as the key parameter of reservoir classification.Then based on FZI theory of flow zone indicator,reservoirs in the studied area are divided into four types by using cumulative frequency division method,and fine permeability models of four reservoirs are established.Finally,by analyzing the characteristics of FZI sensitive conventional logging curve,the ratio of deep and shallow resistivity,the ratio of gamma and density,and P-wave slowness-time are selected to establish the FZI multi-parameter fitting equation,which is applied to permeability evaluation of non-core section.The application result shows that the calculated permeability agrees well with the core analysis data,and it still has good application effect in the coring interval of complex pore structure,which provides a strong theoretical basis for fine reservoir evaluation in the study area.

关 键 词：流动单元指数 渗透率 储层分类 低渗致密储层 

分 类 号：TE122[石油与天然气工程—油气勘探]