Ekofisk field in the Norwegian North Sea was discovered in 1969 but after more than 20 years of production much remains to be understood (Sulak,1990). This case history describes some of the 3-D seismic work carried out at Ekofisk field by the Phillips Licence 018 Group of Companies: a short offset 3-D to image the very shallow layers, a normal surface seismic 3-D especially processed for shallow data, and a 3-D borehole profile, shot to image the crest of the field beneath a gas cloud.
Figure 14-7-1 shows the areas covered by the various 3-D surveys. It also shows the reservoir area that is obscured from normal seismic view by gas in the overlying sediments.
Figures & Tables
This publication is the definitive, and now classic, text on the subject of interpretation of 3-D seismic data. Conceived in 1979 and first published in 1986, the book helps geoscientists extract more information from their seismic data and improve the quality of their interpretations.