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Advancements In 3D CSEM Hardware And Processing For Quantitative Earth Parameter EstimationNormal access

Authors: M.A. Drage, J.P. Morten and P.T. Gabrielsen
Event name: Marine Acquisition Workshop 2018
Session: Marine Acquisition: Non-Seismic Methods
Publication date: 22 August 2018
DOI: 10.3997/2214-4609.201802089
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 703.52Kb )
Price: € 20

Summary:
This presentation will review the latest developments for 3D CSEM acquisition and inversion. The recently introduced high-power, deep-towed EM source increases the dipole moment with up to 10 times compared to the conventional source. It can output 10 kA current and realizes enhanced accuracy and current control to improve detection of deep reservoir targets. The new source enables transmission of broad-band waveforms to resolve the subsurface resistivity with increased resolution including imaging of small reservoirs. This will be demonstrated with examples from large field datasets processed using 3D Gauss-Newton inversion. The inversion achieves exceptionally good data fit which implies that detailed information have been extracted from the measurements, and quantitatively represented in the 3D resistivity subsurface model.


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