Saraswati oil field is located in the central part of Barmer basin in Rajasthan, India. Primary reservoirs are within Barmer Hill Formation, deposited in a fluvial environment overlying the Fatehgarh formation. The Fatehgarh formation also includes sediments deposited in a fluvial environment, but there are also episodes of volcanic flows which were deposited in between the fluvial deposits. Volcanic flows in the upper part of the Fatehgarh mask the seismic reflections of the overlying basal Barmer Hill (BH) deposits. In this paper, we describe the methodology of effective integration of spectral decomposition attributes and seismic attributes to establish sand fairways of the Barmer Hill formation. The main objective of this study was to characterize the thin channel sands within the BH formation. Spectral decomposition technique was applied for characterizing thin bed reservoirs of the Upper BH section.. A combination of spectral decomposition and seismic attribute studies were conducted to distinguish and delineate the Lower BH sands from underlying Fatehgarh volcanics. The results from both these seismic studies were integrated with well and reservoir data to establish lateral distribution of sand fairways and their morphologies within the BH formation.

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