"Interpretation and Modeling of Time-Lapse Seismic Data: Lena Field, Gulf of Mexico"
by: D. H. Johnston, J. J. Shyeh, and J. E. Eastwood, ExxonMobil Upstream Research Co.; and M. Khan, and L.R. Stanley, Western GeophysicalHGS Dinner Meeting: Monday, March 5, 2001
Figure One. Seismic difference volume. The average absolute amplitude map is calculated around the B80 reflection from the difference volume. The polygon outlines approximately the B80 reservoir.
Figure Two. Cross-sections from 1983, 1995, and difference seismic models. The greatest change occurs in the gas-invaded zone (yellow). The top B80 horizon time is shown by the red line on the difference.
Figure Three. 3D visualization of the B80 seismic difference. Blue wells (A28, A25, A17) have watered out, red wells (A5, A7, A25ST) are gas injectors or producers, green wells (A28ST, A18, A17ST) are oil producers and the gray well (A29ST) was lost during a workover in 1994.
