Paul Spencer¹, Tom Dreyer¹

(1) Norsk Hydro Research Centre, Bergen, Norway

ABSTRACT: Geomorphological Elements from Seismic - a New Working Practice

Recent improvements in techniques related to seismic data acquisition, processing and visualisation now enable full integration of 3D seismic datasets in sedimentological and structural geological modeling. Based on this, a new working practice, centered around seismically detectable geomorphological elements, is being developed at the Norsk Hydro Research Centre.

In the exploration domain, focus is now being taken away from conventional prospect delineation, with a greater emphasis being placed on the visualization, recognition and delineation of geomorphological elements from seismic data. Features such as fault systems and fault-linkage zones, diapirs, gas chimneys, submarine fan-systems, submarine canyons, shallow marine spit systems, carbonate mounds and karstic features are just some of the targets of our endeavours.

In the mature exploration areas and in relation to enhanced recovery, the detailed delineation of reservoir sandbodies and subtle fault systems have enabled us to both reduce costs and increase production.

It is through the 3D visualization of these subtle features that new and untested prospectivity may be developed and understood in both mature and immature provinces. The fundamental techniques used for these purposes include conventional seismic attribute analysis, surface and seismic volume visualization and seismic classification, utilizing tools such as VoxelGeo, StratiMagic and Hydros' in-house virtual reality system (CAVE).

Key areas where these techniques are being practiced include the North Sea, Iran, Canada and Angola.

AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado