Inversion of Porosity And Fluid Saturations From Joint Electromagnetic And Elastic Full-waveform Data

We present a method for obtaining the porosity and fluid saturation distributions by simultaneously inverting electromagnetic (EM) and seismic measurements. In this work multicomponent full-waveform elastic data are used. Application of the method on a surface prospecting problem, where the fluid saturation distribution are changing because of oil production, demonstrates that the method not only accurately estimates the porosity distribution, but also accurately identifies the location and magnitude of the changes in the fluid saturation distribution. This suggests that the method has a potential for monitoring fluid movement during oil production.