Abstract

Sometimes sole reliance on seismic data to decipher the morphology of certain geo-bodies could be misleading, as seismic signals are contaminated by noise. Many a times noise is so aligned that it is difficult to distinguish real feature from a seismic artifact. Judicious integration of all available geoscientific data with a strong knowledge of regional geology of the area will help in modeling correct reservoir description. In present study an integrated approach incorporating well data, petrological & geochemical data and reservoir performance analysis was induced as integrated design to minimize the uncertainity of seismo-geological model. The resultant has been a robust and comprehensive picture. A case study is presented from a field in Cauvery Basin where seismic alone could not depict depositional geometry of Oligocene sands. All seismic features and attributes were suggestive of channel- levee complex. However in the newer version seismic data with better imaging progradational features were seen in the sections. After integrating all the available well data and information from laboratories it could be confirmed that new seismic is showing reasonable picture and sediments were found to be deposited in prograding shelf edge slopes. This invites cautious approach for deciphering features from seismic alone without assimilating relevant geological data, information, perception and imagination.