In the conventional approach of interpreting stacked seismic, the goal of a prospect mapping is to define the geologic framework and stratigraphy. Correlating well data with poststack seismic attribute volumes provides some hints to possible hydrocarbon presence and reservoir quality away from wells. However these characterized volumes have already blended the seismic response of different offsets, and can be further distorted by the stacking process. To understand the composition of the framework that is lithology and pore fluid away from well control requires prestack interpretation.<br><br>For decades, interpreters have used poststack seismic volumes as their primary data type due. In contrast, prestack seismic data has been very difficult to access from a standard seismic interpretation environment, partly due to hardware limitations. Its use has been limited to specialists such as AVO experts and seismic processors. Nowadays, with access to affordable hardware providing sufficient disk space and memory to handle huge prestack datasets, the potential to work with prestack data exists. Most importantly, new geophysical tools permit everyday interpreters to view and analyze this prestack seismic data in an integrated interpretation environment.<br><br>This paper describes a case study whereby analyzing prestack data in the interpreter's environment helps to see clearly differences in the prestack response to hydrocarbon or water at the reservoir.<br><br>


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