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Integration of Seismic, CSEM and Seabed Geochemical Data to Reduce Interpretation Risk in Deepwater Exploration in Offsh
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, APGCE 2015, Oct 2015, Volume 2015, p.1 - 5
Abstract
Summary
Seismic data provide the best image of subsurface structures but the nature of the fluid in place in a given reservoir can only be ascertained by corroboration with surface geochemical and CSEM data. In our study area, the seismic data quality are degraded by the widespread presence of shallow gas. CSEM short-offset multi-frequency data attributes clearly mapped the presence of shallow gas at geographical positions which correlate with surface geochemistry anomalies while 3D anisotropic inversion of long-offset in-line data suggest the presence of moderate resistors at depth. The seabed geochemistry and CSEM results are consistent with the seismic data and add value to the exploration. We conclude that seismic, CSEM and seabed geochemistry are a necessary combination in this frontier region to reduce exploration risk and improve the success rate of finding hydrocarbon-filled reservoirs.
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