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6th International Conference & Exposition on Petroleum Geophysics

Improvement of Signal/Noise Ratio and Fault Imaging with Full 3D Prestack Kirchoff Time Migration: A Case Study from Upper Assam

Published in GEOHORIZONS - 2006

C.V.G.Krishna*, B.M.Sinha and K.K.Nath

Abstract


The importance of seismic data in hydrocarbon exploration is realized by the extent to which the subsurface information can be derived during the data interpretation. To achieve this objective seismic data processing should aim at improving the S/N ratio so that a good seismic section can be produced for a meaningful interpretation of the subsurface geological features such as structural highs and lows, faults, pinch-outs etc. which are of paramount importance in hydrocarbon exploration. It is often seen that conventional processing is not always sufficient to bring out clearly certain subtle features of interest in oil exploration. In this paper, the results of Kirchoff Prestack Time Migration process which was carried out over a 3D data is presented. The results have shown a very good improvement (when compared with the conventional post stack migration process) in the fault imaging as well as mapping the horst/graben features and the associated structures for the Eocene reservoirs in OIL

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