Deep-Water
Slope Channel Fill Sandstones, Laingsburg Formation (Permian),
Sprague, Anthony1, Darren Box2,
Matt Grove2, John Ardill3, Lars Seidler4, Maija Schellpeper5, Mike Farrell2,
Mark Rosin6, Jonathan Stewart2, Nowell
Briedis7, Frank Goulding6, John Snedden1, Donatella Mellere8 (1) ExxonMobil
Upstream Research Company, Houston, TX (2) ExxonMobil
Upstream Research Company, Houston, (3) ExxonMobil
Exploration Company, Houston, TX (4) Maersk Oil,
Copenhagen, Denmark (5) ExxonMobil, (6) ExxonMobil Development Company, Houston, (7) Esso, Stavanger, Norway (8) Statoil, Stavanger, Norway
As more deep-water discoveries in
confined slope channel reservoirs in
World-class exposures of deep-water slope
channel fill sandstones in the Permian Laingsburg Formation,
Composite sequences, sequence sets, and
sequences have been identified and mapped. The distribution of reservoir and
non-reservoir lithofacies is determined by the stratal hierarchy within sequences, which include complex,
storey set and storey. Confined slope channel fills are comprised of these stratal packages, which can be mapped at outcrop. The storey
is the fundamental stratigraphic element and is
comprised of bars which stack into bar sets. Bar sets are meter-scale
sedimentary bodies, comprised of traction dominated structures that change
predictably laterally over distances of meters to hundreds of meters.
Recognition of these sedimentary bodies,
their stratal organization and lateral lithofacies distribution has lead to better lithofacies models for improved reservoir prediction.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California