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油层注入聚合物溶液后,电阻率测井响应发生与水驱不同的变化特征,严重影响水淹层测井评价的效果。本文首先分析了聚合物溶液的导电性质,其次按照聚合物驱油层不同施工流程开展岩电实验研究,分析不同驱替阶段的岩石电阻率的变化特征。并对比分析聚合物驱与水驱油层电阻率测井响应的差异。结果表明,不同聚合物驱替饱含油岩心过程,岩心电阻率随饱和度变化呈现“w”型或“S”型和单调下降的形态;清水聚合物驱油层电阻率测井响应呈现弱、未水淹的特征;污水聚合物驱油层电阻率测井响应呈现与污水水驱相似的变化特征。
After the oil layer is injected into the polymer solution, the resistivity logging response changes differently from that of the water flooding, seriously affecting the logging evaluation of the flooded layer. In this paper, the conductivity of the polymer solution is analyzed first, followed by the experimental study of rock electric in accordance with different construction flow of the polymer flooding layer, and the change characteristics of rock resistivity in different flooding stages. The differences between the resistivity log responses of polymer flooding and waterflooding reservoirs were compared and analyzed. The results show that different polymers displace oil-core processes, and the core resistivity changes with the degree of saturation to “w” or “S” shape and monotonically descending morphology. The resistivity log response Showing the characteristics of weak and un-flooded. The resistivity log responses of the polymer flooding layer in the wastewater show a similar variation with that of the wastewater water flooding.