Hierarchical Stratigraphy and Channel Architecture of a
Stelting, Charles E.1,
Morgan D. Sullivan1, Graeme Bennet2 (1) Chevron Energy
Technology Company,
Hierarchical stratigraphic
concepts and methods were employed to assess the reservoir character of Maureen
and Lista formations in the Mariner Field (
The channel complexes vary in type,
architecture and net-to-gross reflecting temporal changes in sediment volume
during the infill of the conduit. The Maureen Formation and Lower Heimdal Sandstone comprise the lower sequence and are
composed of sand-rich, amalgamated channel-fill elements. The channel elements
extend across the width of the slope valley and are overlain by a
shale-dominated abandonment facies. Active sand
deposition was reactivated at the onset of Middle Heimdal
resulting in sinuous, semi-amalgamated channel-fill elements which cross-cut
each other producing a well-connected, channelized
reservoir interval. As sediment input into the slope valley began to wane,
small, non-amalgamated, isolated channels accumulated in an otherwise mud-rich
abandonment fill. The stratigraphic architecture of
the Mariner slope valley complex is similar to other slope valley successions
described from subsurface and outcrop examples.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California