基于流动单元的碳酸盐岩渗透率建模方法  

FLOW-UNIT-BASED MODELING OF CARBONATE RESERVOIR PERMEABILITY

作　　者：赵军[1] 江同文[2] 王焕增[2] 焦翠华[3] 杨林[4] 

机构地区：[1]西南石油大学石油工程学院 [2]中国石油塔里木油田公司勘探开发研究院 [3]中国石油大学资源与信息学院 [4]四川石油管理局测井公司

出　　处：《天然气工业》2007年第2期46-48,共3页Natural Gas Industry

基　　金：国家"十五"重点科技攻关项目"塔里木盆地大中型油气田勘探开发关键技术研究"(编号:2004BA616A02)资助

摘　　要：在储集类型复杂的碳酸盐岩储层中,由于其强烈的非均质的影响,常规的利用孔隙度来评价储层渗透率的方法已不能满足实际生产和科研的需要。根据流动单元理论,把油气藏空间看作为一系列的毛细管,应用Kozeny-Carman方程得到的流动单元指数(FZI),再对储层进行分类。通过对FZI与测井响应的单相关分析,筛选出对FZI反映灵敏的测井响应及响应组合。在具体研究中,选择了校正后的声波时差、自然伽马与密度的比值、深浅侧向电阻率比值为变量,建立了FZI的多参数拟合方程,实现了用测井响应曲线来评价FZI的方法。在此基础上,建立了以流动单元分类为基础的较为精细的非均质储层渗透率评价模型。通过在塔里木油田的现场应用,与未进行分类的碳酸盐岩储层相比,该方法极大地提高了储层渗透率计算的精度,取得了较好的应用效果。For complex carbonate reservoirs,the conventional method of permeability evaluation with porosity cannot meet the requirements of production practice and scientific research,due to the strong heterogeneity of this kind of reservoirs.Based on the flow unit theory,reservoir space can be viewed as being consisted of a series of capillaries and Kozeny Carman function can be used to calculate flow zone indicator(FZI),which is then used to classify reservoirs.Log responses and their combinations sensitive to FZI are selected through single correlation analysis of the FZI and log responses.In our study,the corrected interval transit time,ratio of gamma ray to density,and ratio of deep to shallow investigation laterolog resistivity are selected as variables to establish a multi-parameter fitted equation of FZI,thus realizing evaluation of FZI with log responses.A detailed permeability model of heterogeneous carbonate reservoir is built based on classification of flow units.Its application in Tarim oilfield shows that the accuracy of the calculated permeability with this method is significantly higher than that without classification of flow units,and the effects of application are remarkable.

关 键 词：碳酸盐岩 测井 渗透率 毛细管 流动模型 塔里木盆地 

分 类 号：P618.13[天文地球—矿床学]