A particular hydrocarbon-bearing formation in western India considered. Two different lithologies are mathematically modeled using one-step Markov chains. Time and frequency domain, statistical discriminant analysis. Seven seismic discriminators identified, three of which are abstracted from the autocorrelation function and four from the power spectrum of the seismogram. Potential discrimination of an oil-bearing stratigraphic trap from barren surroundings in a sedimentary basin.--Modified journal abstract.