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Porosity and Permeability Variations in a Tight Gas Sandstone Reservoir Analouge, Westphalian D, Lower Saxony Basin, NW Germany : Influence of Depositional Setting and Diagenesis

Becker, I.; Wüstefeld, P.; Koehrer, B.; Felder, M.; Hilgers, C.

Abstract:
Understanding the spatial variability of reservoir properties in tight gas sandstones can significantly reduce uncertainties in reservoir characterization. This study focuses on two outcrops of Upper Carboniferous (Westphalian D) fluvial sandstones in the southern part of the Lower Saxony Basin, NW Germany, which are analogues for tight, gas‐producing reservoir rocks at fields in the north of the basin. Large‐scale differences in reservoir quality occur between the two outcrops which are separated by a distance of approximately 15 km and by 600 m of stratigraphy. Smaller‐scale heterogeneities in the form of channel geometries occur within individual fluvial cycles, as evidenced in a 30 m (high) by 150 m (long) porosity‐permeability profile at one of the outcrops studied.

In the Woitzel quarry, lower Westphalian D deposits consist of fining‐upwards cycles of channel and bar sandstones with intercalated floodplain sediments and coal seams. In abandoned quarries at the Hüggel location, upper Westphalian D strata are composed of grey and red coloured sandstones which suggest deposition in a fluvial – alluvial plain environment under increasingly arid conditions.
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Originalveröffentlichung
DOI: 10.1111/jpg.12685
Scopus
Zitationen: 24
Dimensions
Zitationen: 20
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 0141-6421, 1747-5457
KITopen-ID: 1000075374
HGF-Programm 35.14.01 (POF III, LK 01) Effiziente Nutzung geothermisch. Energie
Erschienen in Journal of petroleum geology
Verlag John Wiley and Sons
Band 40
Heft 4
Seiten 363-389
Nachgewiesen in Dimensions
Scopus
Web of Science
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