N-15 CAG AND CRP METHODOLOGY – A COMPLEMENT TO AVO CALIBRATION IN HETEROGENEOUS MEDIUM 1 JACQUES BLANCO CHRISTOPHE BORGHI and F. SELVA TOTALFINA ELF Exploration Avenue Larribau 64018 Pau CEDEX France Abstract The AVO technique is widely used for the direct reservoir characterization in terms of lithology and fluids. Its consists of specific processing and analysis/interpretation of pre-stack seismic data. When well information exists it is critical to take advantage of them to quantitatively calibrate the AVO responses. This is the best way to reduce uncertainties on a priori choices regarding the reservoir context and make AVO anomalies interpretation less


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