A computer-implemented method of predicting fault seal, comprising: receiving, at a computer processor, a digital pre-stack seismic image representative of a subsurface volume of interest including at least one fault surface, wherein the at least one fault surface is represented by a fault seismic signal in the digital pre-stack seismic image, and wherein the digital pre-stack seismic image includes an angle dimension or the method comprises converting the pre-stack seismic image to the time angle domain or the depth angle domain; defining a window based on the at least one fault surface; calculating (14-1C, 14C, 14-2C), via the computer processor, a seismic amplitude vs reflection angle, AVA, pattern at each spatial location on the at least one fault surface by obtaining a median value of all amplitudes within the window centered on the spatial location for a given reflection angle, and repeating the calculating for each angle in the digital prestack seismic image to create a complete AVA pattern along the at least one fault surface; evaluating the complete AVA pattern along the at least one fault surface to generate a predicted fault seal, wherein a predicted fault seal predicts if the fault prohibits, impedes or enhances fluid flow in the subsurface volume of interest and wherein generating a predicted fault seal comprises comparing the AVA pattern to a synthetic model or analog AVA data from another subsurface location; and identifying geologic features based on the predicted fault seal, wherein the AVA pattern comprises a cross-plot of seismic amplitude with reflection angle, and wherein the predicted fault seal is based on relating the complete AVA pattern along the at least one fault surface to differences in at least one of: pore-fluid pressure across the fault surface; pore-fluid phase across the fault surface; pore-fluid density across the fault surface; rock porosity across the fault surface; and rock type across the fault surface. receiving, at a computer processor, a digital pre-stack seismic image representative of a subsurface volume of interest including at least one fault surface, wherein the at least one fault surface is represented by a fault seismic signal in the digital pre-stack seismic image, and wherein the digital pre-stack seismic image includes an angle dimension or the method comprises converting the pre-stack seismic image to the time angle domain or the depth angle domain; defining a window based on the at least one fault surface; calculating (14-1C, 14C, 14-2C), via the computer processor, a seismic amplitude vs reflection angle, AVA, pattern at each spatial location on the at least one fault surface by obtaining a median value of all amplitudes within the window centered on the spatial location for a given reflection angle, and repeating the calculating for each angle in the digital prestack seismic image to create a complete AVA pattern along the at least one fault surface; evaluating the complete AVA pattern along the at least one fault surface to generate a predicted fault seal, wherein a predicted fault seal predicts if the fault prohibits, impedes or enhances fluid flow in the subsurface volume of interest and wherein generating a predicted fault seal comprises comparing the AVA pattern to a synthetic model or analog AVA data from another subsurface location; and identifying geologic features based on the predicted fault seal, wherein the AVA pattern comprises a cross-plot of seismic amplitude with reflection angle, and wherein the predicted fault seal is based on relating the complete AVA pattern along the at least one fault surface to differences in at least one of: pore-fluid pressure across the fault surface; pore-fluid phase across the fault surface; pore-fluid density across the fault surface; rock porosity across the fault surface; and rock type across the fault surface. pore-fluid pressure across the fault surface; pore-fluid phase across the fault surface; pore-fluid density across the fault surface; rock porosity across the fault surface; and rock type across the fault surface.