大庆长垣水淹层测井评价技术的研究

THE WELL LOGGING EVALUATION TECHNIQUE OF WATERFLOODED FORMATION IN CHANGYUAN DAQING OIL FIELD ACTA

在分析大庆油田常规水淹层测井评价技术、密闭及常规取心分析资料和混合流体电阻率变化规律的基础上，运用统计学方法建立了一套计算水淹层参数的数学模型，并认为大庆油田厚油层混合水电阻率是驱油效率和注入水电阻率的函数，可用一非线性Ｓ型函数来表示。利用ＤＦＰＢＦＳ最优化算法求解上述函数和广义阿尔奇公式组成的二元非线性方程组，可得出剩余油饱和度和混合水电阻率，进而评价油层的水淹程度。经处理大庆油田三口密闭取心井测井资料表明该方法效果良好。

ased on the systematic analysis of the common well logging evaluation techniques of waterflooded formation,the core data and the law of the mixed fluid resistivity in Daqing Oil field,a series of waterflooded parametric model were set up and the mixed water resistivity was considered as a function of the flooding efficiency and the injecting water resistivity.This function is expressed as an unlinear S function.The above equation and Archie equation can be solved together with DFPBFS,an optimization algorithm,the residual hydrocarbon saturation and the water resistivity can be derived.The flooding effect of the oilbearing formation can be evaluated.The processing of the three well logs in Daqing proved that the above technique is effective.