Petroleum Geoscience; October 2003; v. 9; no. 4;
p. 309-319; DOI: 10.1144/1354-079302-543
© 2003 Geological Society of London
Syn-sedimentary faulting and the formation of localized reservoir sands: Carboniferous examples from the Campine Basin, Belgium and the Dutch offshore
M. Kosters1,2 and
M. E. Donselaar1
1 Department
of Applied Earth Sciences, Delft University of Technology, PO Box 5028,
2600 GA Delft, The
Netherlands
2 Present address: Shell
International Exploration and Production BV, Volmerlaan 6-8, 2288 GD
Rijswijk, The Netherlands
The
Westphalian B in the Campine Basin in Belgium contains a low
net-to-gross succession of fluvial channel and crevasse sandbodies
embedded in lacustrine and floodplain claystone and siltstone. Study
and correlation of closely spaced boreholes reveals a localized
15–25 m thick succession of stacked fluvial channel
sandbodies in this overall low net-to-gross setting. This concentration
of sandbodies is interpreted as the fill of a tectonically induced
palaeo-valley based on the orientation of syn-sedimentary faults and
the palaeogeographical setting of the Campine Basin, far away from the
Westphalian sea. The depositional model was used to interpret stacks of
fluvial sandstone of the Caister Sandstone (Westphalian B) in the Dutch
offshore and may guide finding economic reservoirs in the overall low
net-to-gross labyrinth-type fluvial architecture in this area and in
comparable structural
settings.
KEYWORDS: Westphalian
B, palaeo-valley fill, fluvial
reservoir
architecture
Copyright © 2009 by Geological Society of London