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A review of deformation bands in reservoir sandstones; geometries, mechanisms and distribution

Haakon Fossen, Roger Soliva, Gregory Ballas, Barbara Trzaskos, Carolina Cavalcante and Richard A. Schultz
A review of deformation bands in reservoir sandstones; geometries, mechanisms and distribution (in Subseismic-scale reservoir deformation, M. Ashton (editor), S. J. Dee (editor) and O. P. Wennberg (editor))
Special Publication - Geological Society of London (April 2017) 459 (1): 9-33

Abstract

Deformation bands are common subseismic structures in porous sandstones that vary with respect to deformation mechanisms, geometries and distribution. The amount of cataclasis involved largely determines how they impact fluid flow, and cataclasis is generally promoted by coarse grain size, good sorting, high porosity and overburden (usually >500-1000 m). Most bands involve a combination of shear and compaction, and a distinction can be made between those where shear displacement greatly exceeds compaction (compactional shear bands or CSB), where the two are of similar magnitude (shear-enhanced compaction bands or SECB), and pure compaction bands (PCB). The latter two only occur in the contractional regime, are characterized by high (70-100 degrees ) dihedral angles (SECB) or perpendicularity (PCB) to sigma (sub 1) (the maximum principal stress) and are restricted to layers with very high porosity. Contraction generally tends to produce populations of well-distributed deformation bands, whereas in the extensional regime the majority of bands are clustered around faults. Deformation bands also favour highly porous parts of a reservoir, which may result in a homogenization of the overall reservoir permeability and enhance sweep during hydrocarbon production. A number of intrinsic and external variables must therefore be considered when assessing the influence of deformation bands on reservoir performance.


ISSN: 0305-8719
EISSN: 2041-4927
Coden: GSLSBW
Serial Title: Special Publication - Geological Society of London
Serial Volume: 459
Serial Issue: 1
Title: A review of deformation bands in reservoir sandstones; geometries, mechanisms and distribution
Title: Subseismic-scale reservoir deformation
Author(s): Fossen, HaakonSoliva, RogerBallas, GregoryTrzaskos, BarbaraCavalcante, CarolinaSchultz, Richard A.
Author(s): Ashton, M.editor
Author(s): Dee, S. J.editor
Author(s): Wennberg, O. P.editor
Affiliation: University of Bergen, Department of Earth Science and Museum of Natural History, Bergen, Norway
Pages: 9-33
Published: 20170427
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 81
Accession Number: 2017-041937
Categories: Sedimentary petrologyStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. block diags., 1 table, sketch map
N38°40'54" - N38°40'54", W110°26'25" - W110°26'25"
Secondary Affiliation: Universite de Montpellier, FRA, FranceInstitut Francais de Recherche pour l'Exploitation de la Mer, FRA, FranceUniversidade Federal do Parana, BRA, BrazilUniversity of Texas at Austin, USA, United States
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201723
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