--> Abstract: Outcrop Analogues of Fault Systems Showing Variations in Linkage, Segmentation and Compartmentalisation with Increasing Deformation, by R. R. Jones, K. McCaffrey, J. Imber, and R. Wightman; #90090 (2009).
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Outcrop Analogues of Previous HitFaultNext Hit Systems Showing Variations in Linkage, Segmentation and Compartmentalisation with Increasing Deformation

Jones, Richard R.1; McCaffrey, Ken 2; Imber, Jonathan 2; Wightman, Ruth 3
1 Geospatial Research Ltd., Durham, United Kingdom.
2 Dept. of Earth Sciences, University of Durham, Durham, United Kingdom.
3 Midland Valley Exploration Ltd., Glasgow, United Kingdom.

The progressive development of a Previous HitfaultNext Hit zone, in response to ongoing deformation, can give rise to major changes in the potential of the Previous HitfaultNext Hit to impede or enhance hydrocarbon flow. We show a number of detailed 3D outcrop models of extensional Previous HitfaultNext Hit systems (captured using terrestrial Lidar) that illustrate typical effects of increasing deformation on Previous HitfaultNext Hit linkage, segmentation and reservoir compartmentalisation. Examples of low-strain extensional Previous HitfaultNext Hit systems are often characterised by sparsely distributed, isolated faults and low levels of Previous HitfaultNext Hit linkage. There is little compartmentalisation, and the likely effects on fluid flow are minor. As deformation accumulates, ongoing Previous HitfaultNext Hit growth causes increased Previous HitfaultNext Hit interaction and linkage; i.e. there is a tendency for strain to localise onto a fewer number of larger structures. Mature Previous HitfaultNext Hit zones that have accommodated large extension are often highly linked. We show an example of a large regional-scale active Previous HitfaultNext Hit zone, and present evidence to suggest that the host volume is compartmentalised on at least three scales of observation (~10km, ~100m, ~10m). This appears to occur by progressive linkage of Previous HitfaultNext Hit panels of different orientations (giving rise to curved composite Previous HitfaultNext Hit surfaces), and by bifurcation of Previous HitfaultNext Hit panels (so that different parts of a single panel are linked with other panels of different orientations). These processes give rise to complex patterns of 3D Previous HitfaultNext Hit linkage, and can generate a large amount of low permeability cataclastic Previous HitfaultTop product that will significantly impede hydrocarbon flow.


AAPG Search and Discovery Article #90090©2009 AAPG Annual Convention and Exhibition, Denver, Colorado, June 7-10, 2009