Abstract

Seismic amplitudes contain some additional information about lithology and pore-fluid in the reservoir. By combining intercept and gradient stacks, an optimal seismic stack can be designed to provide maximum discrimination between either fluids or lithologies. This paper will detail the workflow of computing intercept and gradient from a combination of near-mid-far angles stacks. Then define background/shale trend angle from intercept and gradient data at the reservoir. With this trend (angle), fluid and lithology enhanced stacks were generated to verify the fluid contact and lithology/facies changes in the reservoir across the entire seismic survey