Seismic velocity derived hydrocarbon indication

A device, comprising:

• a processor configured to:
• generate a velocity model based upon seismic waveforms via a seismic velocity model builder utilizing full waveform inversion or tomography;
• receive first data representative of a first physical attribute of an area surrounding a well and second data representative of a second physical attribute of an area surrounding a well, wherein the first data comprises a sediment velocity of a formation in a region of a subsurface filled with brine;
• determine a calibration factor based upon the velocity model, the first data, and the second data;
• and
• generate an image based upon the calibration factor for use with seismic exploration above the region comprising a hydrocarbon reservoir and containing structural or stratigraphic features conducive to a
• presence, migration, or accumulation of hydrocarbons.

One or more tangible, non-transitory, machine-readable media comprising instructions configured to cause a processor to:

• derive a velocity model based upon seismic waveforms via a seismic model builder;
• receive data representative of a physical attribute of an area surrounding a well, wherein the data comprises a sediment velocity of a formation in a subsurface region filled with brine;
• generate an attribute model based upon the velocity model and the data;
• and
• render a seismic image based upon the attribute model representative of hydrocarbons in the subsurface region of Earth.