Schlumberger

Technical Paper: Simultaneous Joint Inversion for Susceptibility and Velocity

Society: SEG
Paper Number: 227
Presentation Date: 2011
 

Abstract

We describe the preliminary results of ongoing research on the implementation of a magnetic inversion exploiting a novel positivity constraint and a nonlinear algorithm for the optimization. Inversion is performed into the magnetization domain and not into the susceptibility domain directly. Furthermore, we propose an effective way to integrate magnetic data with refraction tomography data through simultaneous joint inversion (SJI) with the cross-gradients constraint. Application of this method to synthetic data sets demonstrates the benefits of using SJI with respect to separate, single-domain inversions. As for seismic-gravity SJI, a seismic-magnetic SJI is effective for complex imaging problems, such as regions with intrusions or faults.

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