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Sediment Structures Affecting Flow in Eolian Rotliegend Sanstones

Schmidt, Christina; Busch, Benjamin; Hilgers, Christoph

Abstract (englisch):
Eolian dune sandstones are recognized as homogenous reservoir units by both E&P and geothermal industry. Nevertheless, such assumptions neglect the effects of sedimentary structures within the rock mass. This study focusses on analog outcrops of Lower Permian reservoir sandstones in 1) the North German Basin and 2) the Vale of Eden (GB). We sampled vertical plugs within the sediment packages as well as across sediment structures limiting them. Differences in the petrophysical measurements are linked to petrographic results and the flow properties are compared to horizontal plugs of the same unit.
Structures sampled in the quarries are bounding surfaces, erosive boundaries within the sediment. Such surfaces limit sedimentary sets and cosets (equivalent to 3rd and 2nd order surfaces) and their impact on flow will subsequently be proven in a quantitative way.

The English and German samples are of the same age but differ significantly with regard to mineralogy, diagenetic features, porosity and permeability. When compared to bulk samples 3rd order reactivation surfaces from the English quarry partially display a porosity enhancement of <1 % and permeability increase of up to 80 mD (27 %) equivalent to one order of magnitude. ... mehr



Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Poster
Publikationsjahr 2018
Sprache Englisch
Identifikator KITopen-ID: 1000126709
Veranstaltung DGMK/ÖGEW-Frühjahrstagung (2018), Celle, Deutschland, 18.04.2018 – 19.04.2018
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