4D Case Study in the Deep Water Gulf of Mexico – Hoover, Madison and Marshall

A 4D monitor survey was acquired over Hoover, Madison and Marshall in the deep water Gulf of Mexico in late 2005 early 2006. Analysis and interpretation of the 4D data delineated water movement in all three reservoirs and revealed gas exsolution at Marshall. Potential unswept pay was identified at Hoover. In order to fully integrate the 3D and 4D data into the geological and reservoir simulation models at Hoover, 3D and 4D seismic modeling was performed. 4D modeling helped support the presence of a subseismic flow baffle and aided in bracketing its transmissibility. From the integrated analysis, drilling opportunities have been progressed for future drilling at Hoover.