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Reservoir heterogeneity of tight gas sandstones from observations of outcrop and subsurface data in the Lower Saxony Basin, Germany

Becker, I.; Wüstefeld, P.; Hilse, U.; Manss, Y.; Koehrer, B.; Hilgers, C.

Abstract:
Reducing uncertainties in reservoir characterization can immensely benefit from using quantitative outcrop analog data. The comparison of outcrop analogs with subsurface data from well cores enables the delineation of reservoir heterogeneities over basin-scale distances. This study focuses on the structural and diagenetic pattern of Upper Carboniferous tight gas sandstone reservoirs in the Lower Saxony Basin, Germany. The investigated open-pit quarries in the Ibbenbüren-Osnabrück area reflect the sedimentology, stratigraphy, structure and diagenesis of tight gas reservoirs some 50 km further north. They expose fining upwards fluvial cycles of coarse-grained sandstones into siltstones and coal seams. We show how the variation of porosity and permeability of surface and subsurface data links to the diagenetic and structural evolution of tight sandstone reservoirs.

Using He-pycnometry and single-phase gas flow in an isostatic flow cell depicts potential vertical and lateral porosity and permeability trends. Matrix permeabilities show a wide variation from 0.001 to 1 mD in the outcrop samples and in the tight sandstone reservoirs (see also Wimmers & Koehrer 2014). ... mehr



Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Vortrag
Publikationsjahr 2016
Sprache Englisch
Identifikator KITopen-ID: 1000123644
Veranstaltung DGMK/ÖGEW-Frühjahrstagung (2016), Celle, Deutschland, 21.04.2016 – 22.04.2016
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