... Summary Mapping reservoir saturation from electromagnetic data via resistivity is a challenging problem for standard inversion methods. The EM inverse problem is highly non-convex and ill-posed, often requires significant pre-conditioning and regularization. In this paper we explore the use...

... & mining reservoir characterization information deposit covariance matrix conductivity inversion borehole ignacio gonzalez-alvarez artificial intelligence annual meeting regolith-dominated terrain em inversion western australia regolith exploration stratigraphic unit Exploiting...

... resistivity variation integration workflow interpretation em inversion strength Towed Streamer EM data density and target recoverability Zhijun Du*, PGS Exploration (UK) ltd. Summary Towed Streamer EM is a recently introduced marine CSEM data acquisition system. The use of the towed system facilitates...

... this general methodology, we apply an EM inversion to a suite of models in one, two, and three dimensions, and suggest the importance of choos- ing an appropriate model space based on the goal of the EM inversion. INTRODUCTION Electromagnetic (EM) fields and fluxes can be used to excite the earth...

...Using seismic guided EM inversion to explore a complex geological area: An application to the Kraken and Bressay heavy oil discoveries, North Sea Zhijun Du*, PGS Summary The integrated analysis of controlled source electromagnetic (CSEM) with seismic data can provide valuable information...

... as an initial and reference model, the second step used a conventional 3D EM inversion with data locations over the entire survey area. The second stage allowed for fine tuning of the shape and conductivity of the central dipping anomaly, while filling in features, such as overburden, in the remaining areas...

... Summary We introduce a method for integrating Towed Streamer EM and dual-sensor seismic data referred to as seismic guided EM inversion. The inversion workflow is initiated by adopting a sparse-layer depth model defined by dual-sensor seismic data to suggest resistivity boundaries without...

... and electromagnetic (EM) measurements. Joint inversion results from EM and seismic measurements in marine environments are compared to those from separate full-waveform seismic and EM inversions. The comparison shows that the simultaneous joint inversion approach provides more accurate and reliable estimates...

...Full-azimuth, anisotropic 3D EM inversion applied to a low-resistivity pay reservoir with well control D. Crider, M. Scherrer, Focus Exloration LLC T. Pham*, J.J. Zach, M.A. Frenkel, EMGS Americas Summary We demonstrate advances in 3D EM inversion- based subsurface imaging on a challenging target...

... csem acquisition inversion em inversion dataset upstream oil & gas reservoir characterization information international exposition horizontal resolution consideration hydrocarbon em data seg houston 2009 interpretation mt inversion well log Vertical and horizontal...

... reservoir simulation misfit grid simulation mesh conductivity em inversion inverse problem reservoir characterization optimized simulation grid nonconformal mesh alumbaugh equation excitation frequency model space modeling & simulation frequency upstream oil & gas...

...(r) SEG Int'l Exposition and 72nd Annual Meeting * Salt Lake City, Utah * October 6-11, 2002 EM Inversion using the QMR-FFT Fast IE Method J s (r) = r)¡ ¾b (rEs (r) +Eb (r Equations (1), with appropriate boundary conditions, can be solved using the integral equation method, E s(r) = Z - ¹G b e(r; r 0...

... estimation propagation inverse problem artificial intelligence upstream oil & gas monostatic ground-penetrating radar umberto spagnolini pavement gpr reserves evaluation em inversion EM inversion of monostatic ground-penetrating radar NSl.2 Umberto Spagnolini, Politecnico di Milano, Italy...