D-40 1 Seismic Estimation of Rock Parameters-A Case Study H. ÖZDEMİR 1 J. W. HANSEN 2 and E. ROBINSON 1 1 WesternGeco Reservoir Services Schlumberger House Gatwick Airport West Sussex RH6 ONZ England 2 DONG E&P AS Agern Allé 24-26 DK-2970 Hørsholm Denmark Summary Seismic poststack prestack inversion amplitude versus offset (AVO) analysis and AVO forward modeling have been used to map hydrocarbon(s) in an offshore sandstone reservoir where it is difficult to delineate oil-water contacts (OWC). AVO wedge and fluid substitution modeling showed that certain sand and oil column thickness are needed for mapping the oil zones from seismic


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