Marine CSEM Inversion Using the QN-BFGS Method.

Li, Gang, Li, Yuguo and Liu, Ying (2013) Marine CSEM Inversion Using the QN-BFGS Method. [Poster] In: Near Surface Geophysics Asia Pacific Conference. , 17-19 July 2013, Beijing, China . DOI 10.1190/nsgapc2013-155.

Full text not available from this repository.

Supplementary data:

Abstract

In this paper we present an one-dimensional inversion algorithm for marine controlled-source electromagnetic (CSEM) data. The algorithm is based on a quasi-Newton (QN) method with the Broyden–Fletcher–Goldfarb–Shanno (BFGS) update. One can update the Hessian matrix with the BFGS iteration scheme rather than computing the Hessian matrix itself in the QN-BFGS inversion. Thus this method is superior to other methods such as the Gauss-Newton (GN) inversion. We use a L2-norm least squares regulation scheme to generate a smooth solution. The data and the model-constraint part of the objective function are weighted by the trade-off parameter (also called the Lagrangian multiplier) which is determined automatically using an effective empirical method to enhance the robustness of this method.

Document Type: Conference or Workshop Item (Poster)
Additional Information: pp. 645-649
Keywords: inversion, CSEM, algorithm, 2D, 3D
Publisher: Society of Exploration Geophysicists, Australian Society of Exploration Geophysicists, Chinese Geophysical Society, Korean Society of Earth and Exploration Geophysicists, and Society of Exploration Geophysicists of Japan
Date Deposited: 27 Mar 2017 08:11
Last Modified: 27 Mar 2017 08:11
URI: https://oceanrep.geomar.de/id/eprint/37157

Actions (login required)

View Item View Item