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根据毛细管双电层理论和孔隙介质电渗流理论，建立了直流电场作用下油水两相流动模型；用稳态法和非稳态法两种方法，在高孔渗和低孔渗两种情况下讨论了直流电场对油水两相相对渗透率的影响。结果表明：利用直流电场处理油层，能较好地改善油水两相相对渗流关系，使油相相对渗透率增加，水相相对渗透率降低；直流电场电位梯度越大，作用效果越好。稳态方法时， 残余油饱和度时的油水两相相对渗透率随电位梯度的改变而改变。
According to capillary double electric theory and theory of porous media electroosmotic flow, a two-phase flow model of oil-water under DC electric field was established. Two methods, steady state and non-steady state, The effect of DC electric field on the relative permeability of oil-water two-phase is discussed. The results show that the treatment of reservoir with DC electric field can improve the relative seepage between oil and water well, increase the relative permeability of oil phase and decrease the relative permeability of water phase. The greater the potential gradient of DC electric field is, the better the effect is. In the steady-state method, the relative permeability of oil-water two-phase with residual oil saturation changes with the change of potential gradient.