Electroseismic Logging For The Detection And Characterization Of Permeable Zones: Field Measurements And Theory

Abstract

A Stoneley wave propagating in a borehole generates pore fluid flow within the permeable zones intersected by the borehole. In turn, the fluid flow induces a streaming electrical potential. This electrical potential induced by the Stoneley wave can be -measured in the field at frequencies from 100Hz to 4000Hz. Measurements of this Stoneley-wave-induced electrical potential can be used to detect fractures and permeable zones. The amplitude-versus-frequency dependence of this electroseismic phenomenon provides a new way to test theories of the acoustics and the electrokinetics of porous media against field measurements in real :oeks.