Fluid Substitution, Anelastic Offset Synthetic Generation and Seismic Q

B-6 FLUID SUBSTITUTION ANELASTIC OFFSET SYNTHETIC GENERATION AND SEISMIC Q 1 ANTHONY N. FOGG Hampson-Russell Software Services Ltd. Grove House 551 London Road Isleworth London TW7 4DS UK Introduction This paper reviews three geologic regimes; onshore UK thin gas sands in coal cyclothems Permian Rotliegendes sandstones and onshore Alberta gas sands. Fluid substitution of the well logs has been performed for brine and gas scenarios and offset synthetic seismograms generated using elastic and anelastic algorithms. The impact of fluid change lithology type and wavefield type on the intercept-gradient stack seismic response are investigated. The investigation also focuses on Q (the