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Industry Article: Multi-Disciplinary Integration of Seismic Interpretation, AVO Inversion and CSEM in the West Loppa Exploration

Multi-Disciplinary Integration of Seismic Interpretation, AVO Inversion and CSEM in the West Loppa Exploration
Publication: First Break
Publication Date: 04/01/2014

Information about pore fluids can be extracted through amplitude-variation-with-offset (AVO) seismic inversion procedures; however, AVO and amplitude anomalies may be caused by lithology boundaries or thinbed effects rather than changes in fluid content. The marine controlled-source electromagnetic (CSEM) method has the potential to detect resistive layers associated with hydrocarbon reservoirs; however, similar to many other geophysical tools, CSEM inversion is often non-unique and subject to uncertainty. The most reliable answer to hydrocarbon exploration is obtained by the combination of independent tools. By integrating seismic and CSEM data in a staged workflow, limitations of each method can be overcome and the strengths of each exploited. This article describes the integration of multiple geophysical methods for reducing uncertainty in identifying hydrocarbon potential during the predrill appraisal of a prospect in the West Loppa area of the Barents Sea.




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