大庆长垣不同时期测井解释渗透率变化规律探讨

Changing Rules of Well Log Interpretation Permeability in Different Period in Daqing Placanticline

为了认识大庆长垣注水开发过程中储层渗透率的变化规律 ,研究储层水驱过程 ,寻找剩余油及其分布 ,满足地质建模和数值模拟的需要 ,分析大庆长垣不同时期测井解释渗透率差异较大的原因 ,研究了不同岩心的室内水驱实验渗透率的变化 ,优选区块的取心井岩心分析渗透率的变化 ,优选区块的开发井测井解释渗透率的变化 ,并对变化规律进行了对比分析。结果表明 ,随着油田注水开发 ,储层的渗透率逐渐增大 ,造成不同时期完钻井测井解释渗透率差异较大的原因不仅仅是储层渗透率自身的变化 ,更重要的是与测井解释模型的差异有关。建议对不同时期测井解释渗透率进行系统误差校正 。

In order to know the change of the reservoir permeability with waterflood of the Daqing Placanticline,to research the waterflood course of the reservoir, to find the distribution of remaining oil,to meet the need of geologic model and numerical modeling,to analysis the reason of the difference of the log interpretation permeability in different development period,the permeability of waterflood experiment,the permeability of core analysis and the well log interpretation permeability are researched and compared.The results show that the reservoir permeability increased with the course of waterflood,there are two reasons that cause the difference of the log interpretation permeability in different development period,one reason is the change of permeability with the course of waterflood;the other more important reason is the difference of well log interpretation model .According to these results,the verification of the log interpretation permeability is suggested to meet the needs of fine reservoir research.