Geologic Studies in Alaska by the U.S. Geological Survey, 1992

RESERVOIR FRAMEWORK ARCHITECTURE, CLAMGULCHIAN TYPE SECTION, STERLING FORMATION 129
volcanism along the Aleutian-Alaskan Ranges frequently
interrupted organic accumulation in the mires (Reinink-
Smith, 1990).
Depositional system analysis of the Clamgulchian
sandstones provides insights into the framework architec-
ture of reservoir systems that control accumulation and
production of hydrocarbons. Fining-upward sandstone
complexes formed by the bedload fluvial system are the
most homogeneous and least compartmentalized reservoir
systems. Fining-upward sandstone complexes containing
abandoned channel plugs and highly variable sedimentary
structures formed by the mixed bedload and suspended-
load fluvial system are heterogeneous and highly compart-
mentalized reservoir systems. Finally, close facies
association of the bedload fluvial-system sandstones with
coal and carbonaceous shale sequences, which serve as
source rocks for biogenic gas, provide the best potential
targets for hydrocarbon exploitation.
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Reviewers: C. William Keighin and Richard G. Stanley