Simulation of Monopole and Multipole Seismoelectric Logging

Zhiwen Cui,Kexie Wang,Yujun Zhang,Hengshan Hu,Jinxia Liu

doi:10.1155/2011/107827

Abstract

In a fluid‐saturated porous formation, acoustics and electromagnetic waves are coupled based on Pride seismoelectric theory. An exact treatment of the nonaxisymmetric seismoelectric field excited by acoustic multipole sources is presented. The frequency wavenumber domain representations of the acoustic field and associated seismoelectric field due to acoustic multipole sources are formulated. The full waveforms of acoustic waves and electric and magnetic fields in the time domain propagation in borehole are simulated by using discrete wave number integration, and frequency versus axial‐wave number responses are presented and analyzed.

Highlights

The study of wave propagation in a fluid-saturated porous medium is of considerable interest in acoustics and geophysics due to its important applications in various technical and engineering processes
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Time formations based on the entire Pride seismoelectric theory
We consider the nonaxisymmetric seismoelectric field excited by acoustic multipole sources

Summary

Introduction

The study of wave propagation in a fluid-saturated porous medium is of considerable interest in acoustics and geophysics due to its important applications in various technical and engineering processes. Biot predicted the slow waves should have an important bearing on electrokinetic effect [4] This predication has been quantitatively confirmed by Pride [5] and Hu [6]. Elastic waves propagating in fluid-saturated porous media generate a movement of the ions in the pore fluid. Such movement induces an electromagnetic (EM) field. Pride [8] derived the governing equations for the coupled acoustics and electromagnetic waves in fluid-saturated porous media. Seismoelectric logging methods based on the excitation and reception of axisymmetric wave phenomena in a fluid-filled borehole embedded in permeable formations have been investigated [6, 15]. To above as well as experimental wave propagation in fluidsaturated porous media

Theoretical Formulations

Simulations

P wave

Conclusions and Discussions