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Generalized Multiparameter Joint Inversion Using Joint Total Variation - Application to MT, Seismic and Gravity Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
We show that joint total variation can be efficiently used for simultaneous joint inversion of any number of geophysical methods, each sensitive to a different physical parameter of the subsurface. Joint total variation both provides structural coupling between different parameter domains and serves as a stabilizing functional in each domain, simplifying the objective function. Iteratively reweighted least squares scheme with Levenberg-Marquardt method results in decoupled linear systems for different domains, making computational complexity of joint inversion linear with respect to the number of domains and simplifying its software implementation. This approach is applied to 2-D joint inversion of MT impedance, seismic first-arrival traveltime and vertical component of gravitational field and its gradient. Results of the numerical experiment with synthetic data show efficiency of the approach and improvement of the inversion results over the single-domain inversions.