1. A method for generating seismic fluid prediction data for a subsurface region, comprising: preconditioning seismic data for amplitude-versus-offset (AVO) analysis; generating seismic AVO attribute data for the subsurface region, including creating intercept (A) and gradient (B) seismic data using two or more angle stacks of seismic data; generating lithology prediction data with the intercept (A) and gradient (B) seismic data; generating an AVO crossplot for fluids to identify an initial AVO anomaly; and generating seismic fluid prediction data based on the generated AVO crossplot and lithology prediction data.