From Angle Stack To Fluid And Lithology Stacks – A Case Study From Norwegian Sea.

Seismic amplitudes contains some additional information about lithology and pore-fluid in the reservoir. By combining AVO intercept and gradient attributes along an angle of rotation, an optimal seismic stack can be designed to provide maximum discrimination between either fluids or lithologies. The fluid stack is an optimal stack for enhancing fluid effects in the seismic data. This stack is used to highlight hydrocarbon reservoirs. A lithology stack is an optimal stack for enhancing lithology variations where fluid effects are removed or reduced. This stack is used for mapping instances of sand.