Introduction - 3-D Seismic Interpretation - page 11

(a)

3-D seismic

2-D seismic

(b) (b)

1975 1975

(2-D seismic)

1991
(3-D seismic)

Fault

Producer
Injector

Erosion edge

Fig. 1.6 Changes to maps owing to 3-D seismic: (a) Alabaster Field, Gulf of Mexico (redrawn
after Greenlee et al ., 1994, with permission of the authors and the SEG); (b) Cormorant Field, UK
North Sea (redrawn after Demyttenaere et al . (1993 ) with permission of the authors and the
Geological Society of London).

(4) During field life, additional producers and injectors may be needed to optimise oil
recovery. An accurate structural map will certainly be needed, and any information
that can be gleaned from seismic on lateral variation of reservoir quality will be
highly welcome. A further contribution from seismic is possible: we can sometimes