TechnoImaging's EMVision®¹ provides 3D modeling, 3D inversion and 3D migration services for marine electromagnetic surveys, including the following survey types:

• Towed transmitter with fixed ocean bottom receiver (e.g., CSEM)
• Towed transmitter and towed receivers with fixed offset (e.g., towed streamer)
• Fixed transmitter with towed receivers (e.g., marine electromagnetic remote sensing – MEMRS®¹)
• Fixed transmitter with fixed receivers (e.g., multi-transient electromagnetics)

EMVision® can be used to simulate or interpret marine CSEM data for full field exploration and appraisal models, and/or dynamic reservoir models for time-lapse CSEM. TechnoImaging can also provide CSEM data processing and conditioning services.

EMVision® can simulate and invert upon 3D resistivity models of arbitrary complexity, including bathymetry and anisotropic resistivity. 3D a priori resistivity models constructed from seismic interpretations can be included in both inversion and migration.

EMVision® can model, invert and migrate both frequency- and time-domain inline and azimuthal CSEM data for any of the above listed CSEM survey types.

TechnoImaging has developed CSEM case studies to demonstrate how it is practical to rigorously invert both 2D and 3D CSEM surveys for 3D resistivity models with approximately one million cells within a day.

EMVision® incorporates TechnoImaging's focusing regularized inversion that enables the recovery of models with sharp conductivity contrasts, rather than models with smooth conductivity distributions. Coupled with fast run-times, this enables multiple inversion scenarios to be explored so as to minimize 3D model uncertainty.

EMVision® supports data formats from PGS, WesternGeco, EMGS and OHM, and industry standard earth model formats used by Petrel² and GoCad/SKUA³.

EMVision® also enables Internet-hosted 3D CSEM modeling, inversion and migration on TechnoImaging's high performance computing resources.

TechnoImaging is able to provide short courses and training on 3D CSEM modeling, inversion and migration.

M. S. Zhdanov, 2010, Electromagnetic geophysics: Notes from the past and the road ahead. Geophysics, vol. 75, no. 5, pp. 75A49-75A66.

M. S. Zhdanov, E. P. Velikhov, M. Cuma, G. Wilson, N. Black and A. Gribenko, 2010, Exploring multiple 3D inversion scenarios for enhanced interpretation of marine CSEM data: An iterative migration analysis of the Shtokman gas field. First Break, vol. 28, no. 3, pp. 95-101.

M. Cuma, G. A. Wilson, M. S. Zhdanov, E. P. Velikhov, N. Black, A. V. and Gribenko, 2010, Multiple inversion scenarios for enhanced interpretation of CSEM data using iterative migration: A case study for the Shtokman gas field, Barents Sea. Presented at SEG 80th Annual Meeting, Denver, USA, 17-22 October.

B. Hobbs, M. S. Zhdanov, A. Gribenko, A., Paterson, G. A. Wilson and C. Clarke, 2010, 3D focusing regularized inversion of marine transient electromagnetic data: A case study from the Alvheim field, North Sea. Presented at SEG 80th Annual Meeting, Denver, USA, 17-22 October.

N. Black, G. A. Wilson, A. V. Gribenko and M. S. Zhdanov, 2010, 3D inversion of time-lapse CSEM data for reservoir surveillance: Presented at SEG 80th Annual Meeting, Denver, USA, 17-22 October.

B. A. Hobbs, M. S. Zhdanov, A. V. Gribenko, G. A. Wilson, S. Tarkhan and A. Peterson, 3D inversion of transient electromagnetic data from the Alvheim field, North Sea. Presented at the 21st ASEG Geophysical Conference and Exhibition, Sydney, Australia, 22-26 August.

M. S. Zhdanov, M. Cuma and G. Wilson, 2010, Large-scale 3D iterative migration of marine controlled-source electromagnetic data with focusing regularization. Presented at Progress in Electromagnetics Research Symposium, Boston, MA, 5-8 July.

B. A. Hobbs, M. S. Zhdanov, A. Gribenko, A. Paterson, G. Wilson and C. Clarke, 2010, 3D inversion of transient EM data: A case study from the Alvheim field, North Sea. Presented at 72nd EAGE Conference and Exhibition, Barcelona, Spain, 14-17 June.

M. S. Zhdanov, M. Cuma and G. Wilson, 2010, 3D iterative migration of marine controlled-source electromagnetic data with focusing regularization. Presented at 72nd EAGE Conference and Exhibition, Barcelona, Spain, 14-17 June.

M. S. Zhdanov, M. Cuma, A. Gribenko, G. Wilson and N. Black, 2010, 3D inversion of marine CSEM data: A feasibility study from the Shtokman gas field in the Barents Sea. Presented at International Workshop on Electrical, Gravity and Magnetic Methods, Capri, Italy, 11-14 April.

M. S. Zhdanov, 2009, Geophysical Electromagnetic Theory and Methods. Elsevier, 886 p.

M. S. Zhdanov, 2002, Geophysical Inverse Theory and Regularization Problems. Elsevier, 633 p.

O. N. Portniaguine and M. S. Zhdanov, 2001, Method of digital image enhancement and sharpening. US Patent No. 6,879,735.

¹ Registered trademark of TechnoImaging.

² Registered trademark of Schlumberger.

³ Registered trademark of Paradigm Geophysical.