Static and dynamic connectivity in bed-scale models of faulted and unfaulted turbidites

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Title: Static and dynamic connectivity in bed-scale models of faulted and unfaulted turbidites
Authors: Manzocchi, Tom
Walsh, John J.
Tomasso, Mark
Strand, Julian
Childs, Conrad
Haughton, Peter D. W.
Permanent link: http://hdl.handle.net/10197/3030
Date: 2007
Abstract: A range of unfaulted and faulted bed-scale models with sheet-like bed geometries have been built and analysed in terms of static bed connectivity and fractional permeability assuming permeable sands and impermeable shales. The models are built using a new method which allows amalgamation ratio to be included explicitly as model input and this property, rather than net:gross ratio, is found to be the dominant control on inter-bed connectivity. The connectivity of faulted sequences is much more complex and is dominated by interactions of variables. A comprehensive modelling suite illustrates these results and highlights the extremely rare combinations of circumstances in which faulted sequences have lower connectivities than their unfaulted sedimentological equivalents, irrespective of whether fault rock properties are included or not. In general, models containing stochastically placed shale smears associated with each faulted shale horizon are better connected than if deterministic Shale Gouge Ratio cut-offs are applied. Despite the complex interactions between geological input and bed-scale connectivity, the flow properties of a system are controlled by only three geometrical, rather than geological, variables describing connectivity, anisotropy and resolution. If two different faulted or unfaulted systems have identical values of these three variables they will have the same flow properties.
Funding Details: Not applicable
Type of material: Book Chapter
Publisher: Geological Society, London
Copyright (published version): The Geological Society of London 2007
Keywords: Turbidites;Connectivity;Faults;Bed-scale
Subject LCSH: Turbidites
Faults (Geology)
DOI: 10.1144/SP292.18
Language: en
Status of Item: Peer reviewed
Is part of: Jolley, S. J. et al (eds.). Structurally complex reservoirs
Appears in Collections:Earth Sciences Research Collection

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