三元复合剂驱岩石复电阻率频散特性实验研究

Experimental Study on Complex Resistivity Dispersion Property of Rocks under Alkali-surfactant-polymer Flooding

目前大庆油田三元复合剂驱已具备了工业化推广的条件,三元复合剂驱对复电阻率的影响有待于实验研究论证。实验针对不同地层水矿化度,在三元复合剂驱条件下进行了泥质砂岩岩心复电阻率频散特性的实验研究,分析了同一地层水矿化度不同含水饱和度下和同一含水饱和度不同地层水矿化度下岩心复电阻率的频散特性;以及不同地层水矿化度不同频率下聚合物驱岩心复电阻率变化特征。实验结果表明,复电阻率模值、模的差值、虚部、虚部差值、虚部比值与含水饱和度有着很好的单调相关性,可以用来评价三元复合剂驱条件下储层的油水层解释。

At present, ASP（alkali-surfactant-polymer）flooding possesses the condition of industrialization generalization in Daqing oilfield, the influence of ASP flooding on complex resistivity needs to be researched and demonstrated by experiments. Under the different salinities of formation water, we make the experiments with complex resistivity dispersion property of argillaceous sandstone under the condition of ASP flooding. Analyzed are the core complex resistivity dispersion property under the same salinity of formation water with different water saturation and the same water saturation with different salinity of formation water; In addition, analyzed is the core complex resistivity changes under the different salinity of formation water and different frequency polymer. Experiment results show that complex resistivity modulus, difference of the modulus, imaginary part, difference of the imaginary part and the ratio of imaginary part have good monotone relativity with the water saturation, so it may be used to evaluate oil and water zone under ASP flooding.