Experiments of electrical responses of waterflooded layers were carried out on porous, fractured, porous-fractured and composite cores taken from carbonate reservoirs in the Zananor Oilfield, Kazakhstan to find out the effects of injected water salinity on electrical responses of carbonate reservoirs. On the basis of the experimental results and the mathematical model of calculating oil-water relative permeability of porous reservoirs by resistivity and the relative permeability model of two-phase flow in fractured reservoirs, the classification standards of water-flooded layers suitable for carbonate reservoirs with complex pore structure were established. The results show that the salinity of injected water is the main factor affecting the resistivity of carbonate reservoir. When low salinity water (fresh water) is injected, the relationship curve between resistivity and water saturation is U-shaped. When high salinity water (salt water) is injected, the curve is L-shaped. The classification criteria of water-flooded layers for carbonate reservoirs are as follows: (1) In porous reservoirs, the water cut (f_w) is less than or equal to 5% in oil layers, 5%–20% in weak water-flooded layers, 20%–50% in moderately water-flooded layers, and greater than 50% in strong water-flooded layers. (2) For fractured, porous-fractured and composite reservoirs, the oil layers, weakly water-flooded layers, moderately water-flooded layers, and severely water-flooded layers have a water content of less than or equal to 5%, 5% and 10%, 10% to 50%, and larger than 50% respectively.

在哈萨克斯坦Zananor油田碳酸盐岩储层中的多孔，压裂，多孔破裂和复合岩心上进行了水驱层电响应实验，以了解注入的盐度对碳酸盐岩储层电响应的影响。根据实验结果和通过电阻率计算多孔储层油水相对渗透率的数学模型以及裂缝性储层的两相流相对渗透率模型，确定了适用于含碳酸盐岩储层的水驱层分类标准。建立了复杂的孔结构。结果表明，注入水的盐度是影响碳酸盐岩储层电阻率的主要因素。当注入低盐度水（淡水）时，电阻率与含水饱和度之间的关系曲线为U形。当注入高盐度水（盐水）时，曲线为L形。碳酸盐岩油藏注水层的分类标准如下：（1）在多孔油藏中，含水率（f _w）在油层中小于或等于5％，在弱水淹层中小于或等于5％–20％，在中等水淹层中小于或等于20％–50％，在强水淹层中大于或等于50％ 。（2）对于裂缝，多孔裂缝和复合储层，油层，弱水层，中水层和重水层的含水量小于或等于5％，5％和10％，10％至5​​0％和大于50％。