Four generations of 3D seismic surveys have been acquired over the Eugene Island 330 field, first in 1985, then in 1988, 1992 and again in 1994. These datasets contain seismic snapshots of the LF reservoir, the field's predominant light oil producer, as it has been drained of more than 10 million barrels of oil equivalents.
The 4D study was begun in 1992. At that time, a traditional, gravitational water drive was assumed to be sweeping the LF reservoir in both Fault Bolocks A (FBA) and B (FBB). A 1992 snapshot shows considerable seismic amplitudes remaining downdip of the supposed oil/water contact.
