关键词: 水淹层, 剩余油饱和度, 地层水电阻率, 大庆, 测井评价

Abstract: Based on the systematic analysis of the common well logging evaluation techniques of water-flooded formation,the core data and the law of the mixed fluid resistivity in Daqing Oil field,a series of water-flooded 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 oil-bearing formation can be evaluated.The processing of the three well logs in Daqing proved that the above technique is effective.

Key words: water-flooded formation, residual hydrocarbon saturation, formation water resistivity, Daqing, well log evaluation