Seismoelectric Effect of Oil-Wetted Porous Media Containing Two-Phase Flow

In oil reservoirs, if mainly has wettability in the solid phase, such as carbonate medium is oil-wetted. For oil-wetted porous media containing an and water two-phase flow, there are electric double layers at both oil–solid interface oil–water interface, which can stimulate seismoelectric effect. To date, most of studies on effects have focused water-wetted media, however, few reported cases especially flow. this paper, we adopted pore model, assumed to be immiscible, each phase continuous distributed parallel. We also considered influence layer It was concluded that effect a flow caused by while ignored. regarded equivalent fluid, then derived governing equation proposed flux-averaging method derive electrokinetic coupling coefficients under excitation steady acoustic field time-harmonic field. investigated formation parameters, namely, saturation, size, viscosity porosity, effect, provide theoretical reference for study logging formations