Scarborough Gas Field
21a shows an image of the seafloor over the Scarborough gas field generated
using 2D seismic data. The seismic data consists mainly of 1,250 m-spaced,
WNW–ESE oriented, dip lines. The image has had colour drape applied to reveal
the broad, seafloor structure and sun illumination
The effects seen on Figures 21a and b may be similar to those noted by Hovland et al (1987). These workers described gas-related pockmarks in the North Sea which had increased seismic reflectivity, caused by near-surface, carbonate-cemented sands. Similar prominent seafloor amplitude anomalies, which relate to localised seafloor induration around hydrocarbon seeps, have been described on the Yampi Shelf in the north-eastern Browse Basin by O’Brien et al (1998b, 2000).
Seafloor pockmarks above the Scarborough gas field (5 km graticule). b)
Near-surface seismic amplitude anomalies above
The APPEA Journal 2000. © This collection APPEA Limited 2000. Authors retain © in respect of their own contribution.