Аннотация:Electromagnetic field excites acoustic field in a porous elastic medium saturated with fluid
electrolyte due to electrokinetic conversion effect. Our solution of finite-difference equations,
obtained from Pride’s equations describing this process, showed that acoustic field consists of
the same types of waves as in the process of traditional acoustic logging plus fast wave, which
propagates almost instantly. Amplitude of this wave is sensitive to the formation permeability
and can be registered, if proper electric emitter is used. Modified Pride’s equations, which take
into account the effect of Joule heating on the propagation of acoustic waves, are used in this
work. It follows from numerical results that Joule heating can make significant contribution to
the acoustic field.