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Lateral variations of detrital, authigenic and petrophysical properties in an outcrop analog of the fluvial Plattensandstein, Lower Triassic, Central S-Germany

Schmidt, Christina; Busch, Benjamin ORCID iD icon; Hilgers, Christoph

Abstract:

The lateral heterogeneity of reservoir rocks is important to assess storage potential and permeability. This case study focusses on a Lower Triassic (upper Olenekian) outcrop of fluvial sandstones of the Plattensandstein Member (Röt Formation) near Röttbach in the southern part of the Germanic Basin, southern Germany. The Buntsandstein Group is considered a suitable reservoir for thermal storage or exploration in southern Germany. In the Röttbach Quarry, the >10 m thick lithic arkoses are exposed over 35 m laterally in three adjacent walls and consist of two units separated by an erosive surface. They are covered by several metres of the Lower Röt Claystone Member. Using sedimentological logging, spectral gamma ray-, porosity- and permeability measurements as well as petrographic analyses calculating compaction parameters, lateral reservoir quality differences are studied. Sedimentary structures in the multi-storey channels suggest a point bar deposit. The migration direction of the channels correlates with deteriorating reservoir quality. This reduction in porosity and permeability correlates with an increased detrital mica and authigenic illite content, the occurrence of rip-up clasts and a lateral increase of gamma ray signatures by 19 API (avg. ... mehr


Postprint §
DOI: 10.5445/IR/1000122987
Veröffentlicht am 01.08.2022
Originalveröffentlichung
DOI: 10.1127/zdgg/2020/0234
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Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 27.12.2021
Sprache Englisch
Identifikator ISSN: 1860-1804
KITopen-ID: 1000122987
Erschienen in Zeitschrift der Deutschen Gesellschaft für Geowissenschaften
Verlag E Schweizerbart Science Publishers
Band 172
Heft 4
Seiten 541-564
Vorab online veröffentlicht am 27.08.2020
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