Porten and others show how reservoir quality of deep-marine
sandstones is controlled by sediment composition, transport, and depositional
histories in a range of sediment-gravity-flow deposits in a Maastrichtian
submarine-fan in the Vøring Basin (Norwegian Sea, Norwegian continental shelf).
In these strata, porosity increases with decreasing clay content, and
permeability increases with increasing grain size, decreasing clay volume, and
increasing porosity. Porosities of the different depositional bed types are
similar, whereas permeabilities are distinct, with high-density turbidites
having permeabilities approximately two orders of magnitude higher than
clay-rich hybrid event beds. The results of this study emphasize the importance
of the transport and depositional processes responsible for producing different
bed types with characteristic composition and texture. This step is
essential in reservoir evaluation, necessary for predicting most likely
porosity and permeability evolution with sediment burial and for understanding
reservoir quality distribution in potential deep-marine siliciclastic
hydrocarbon reservoir targets.
A sedimentological process-based approach to depositional reservoir quality of deep-marine sandstones: an example from the Springar Formation, northwestern Vøring Basin, Norwegian Sea by Kristin W. Porten, Ian A. Kane, Michał J. Warchoł, and
Sarah J. Southern
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