Место издания:DEStech Publications Columbia University, United States
Первая страница:592
Последняя страница:597
Аннотация:It's proposed new approach for evaluation of permeability value of a rock surrounding borehole on a base of electrokinetic effect. According to Pride's model described the coupling propagation of acoustic and electromagnetic disturbances in porous media, it was developed new approach for evaluation of the rock permeability by the code created for analyzed such situation. Arising electromagnetic waves excited by acoustic tool. It was considered by means of expansions of plain waves (TKO procedure) the ratio of complex-valued amplitudes of axial component of Stoneley's electrical wave to Stoneley's pressure wave. It's stated that the ratio is the most sensitive to permeability and mudcake stiffness in wide range of theirs values. For open and sealed pores on borehole wall the analytical expressions were presented. For these cases by selection appropriate parameters it's possible to evaluate rock permeability. At present this algorithm is enough good to define rock permeability.