What is it about?
This paper details the process for building confidence in using these relatively new data through benchmarking of drilled or known cases using existing multi-client data. The Benchmark demonstrated that predictions can be made with a confidence of about 80%.
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Why is it important?
Seismic data alone are prone to several false positives such as low-saturation gas and lithology changes - when combined with the CSEM resistivity measurement, more confident prediction of large hydrocarbon accumulations can be made. Additionally, CSEM data are more able to make a volume estimate of high saturation hydrocarbons thus increasing the ability to identify economic accumulations.
Perspectives
This benchmarking exercise developed suitable methodology for data integration and enabled the pre-drill prediction of three wells - with correct prediction for all three : two negative CSEM results with water wet and low saturation gas, and one with a positive CSEM response that proved gas/condensate.
Snr. Specialist, Non-seismic Geophysics Antony Price
TotalEnergies
Read the Original
This page is a summary of: Building confidence in CSEM for exploration: Benchmarking, August 2019, Society of Exploration Geophysicists, DOI: 10.1190/segam2019-3214720.1.
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