基于流动单元划分的储层测井二次解释

Well log reinterpretation based on reservoir flow unit division

宝浪油田三工河组储层是在辫状河三角洲环境下沉积的河道砂体,非均质性严重,常规测井解释以砂层为解释单元,忽视砂层内部物性及渗流特征的差异,测井解释精度低.通过对砂层细分流动单元,采用聚类分析的方法将Ⅱ油组储层划分为5类独立的流动单元,在不同的流动单元内建立不同的测井解释模型.结果表明:模型计算出的孔隙度和渗透率精度更高,分别达到90%和80%以上,较好地反映了储层内部的非均质性特征,为精细油藏描述提供可靠的孔隙度、渗透率参数.

Sangonghe reservoir of Baolang oilfield are braided delta channel sandbody with serious hetero-geneity,conventional well log interpretation often gets unsatisfactory results because it only considerss and bodies as an interpretation unit,and ignores the variation of property and filtrate characteristics within the unit.Through subdivision of flow unit,the Ⅱ reservoir is classified into 5 different types of flow units by the means of clustering analysis.This paper develops different well log interpretation models for different flow units.The model improves the accuracy of porosity and permeability computationto 90% and 80%,which accurately reflects inner heterogeneity in detail.The outcomes provide reliable parameters for fine reservoir description.