HOUSTON --Many of the existing Gulf of Mexico oil and gas fields were discovered years ago using then-current technology. Today's advancements can lead to new production that was not found with the older techniques.
In particular, the more current capacity to relate seismic data to lithology, porosities, and fluids as well as velocities and densities can provide more strategic and accurate tools to locate reservoirs.
In a paper for the Offshore Technology Conference, Fairways Offshore Exploration said that new tools such as multi-discipline teams and integrated rock property assessments could be successful if applied over old fields in the GoM. Melding petrophysics and geophysics in what Fairways called "seismic petrophysics" was used to investigate an existing field.
In the presentation, Fairways compared results of a conventional seismic data interpretation with a more advanced approach combining well log analysis with pre-stack seismic data for a more accurate rock-based description of the subsurface. In a case study using amplitude versus offset (AVO) technology on a 3D data set on 70 wells, a total of 500,000 bbl of bypassed reserves were identified.