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Evolution of small-scale flow barriers in German Rotliegend siliciclastics

Busch, Benjamin ORCID iD icon; Winkler, Rebecca; Osivandi, Keyvan; Nover, Georg; Amann-Hildenbrand, Alexandra; Hilgers, Christoph ORCID iD icon

Abstract:

Many siliciclastic reservoirs contain millimetre-scale diagenetic and structural phenomena affecting fluid flow. We identified three major types of small-scale flow barriers in a clastic Rotliegend hydrocarbon reservoir: cataclastic deformation bands; dissolution seams; and bedding-parallel cementation. Deformation bands of various orientations were analysed on resistivity image logs and in core material. They are mainly conjugates, and can be used to validate seismically observable faults and infer subseismic faults. Bedding-parallel dissolution seams are related to compaction and post-date at least one set of deformation bands. Bedding-parallel cementation is accumulated in coarser-grained layers and depends on the amount of clay coatings.

Apparent permeability data related to petrographical image interpretation visualizes the impact of flow barriers on reservoir heterogeneity. Transmissibility multiplier calculations indicate the small efficiency of the studied deformation bands on flow properties in the reservoir. Deformation bands reduce the host-rock permeability by a maximum of two orders of magnitude. However, host-rock anisotropies are inferred to reduce the permeability by a maximum of four orders of magnitude. ... mehr


Postprint §
DOI: 10.5445/IR/1000054662
Originalveröffentlichung
DOI: 10.1144/SP435.3
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 18.11.2015
Sprache Englisch
Identifikator ISSN: 0305-8719, 0375-6440, 2041-4927
KITopen-ID: 1000054662
Erschienen in Special publications / the Geological Society, London
Verlag Geological Society
Band 435
Heft 141-160
Seiten online
Nachgewiesen in Dimensions
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