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Lateral Heterogeneity of Reservoir Properties in an Homogenous Lower Triassic Sandstone, Southern Germany

Schmidt, Christina; Busch, Benjamin; Hilgers, Christoph

Abstract (englisch):
Characterizing a subsurface reservoir, the geologist is reliant on core material, which allows for only a small-scale view into the target area. Hence, analytically determined reservoir properties from core material can barely serve as proxy for a large 3D prospect. This analog study of a proposedly homogenous Lower Triassic sandstone in Southern Germany offers a means to fill gaps like sedimentary facies and clearly points out the variability along a lateral section concerning porosity φ and horizontal permeability kh. Successively, the measured plugs served for petrographic assessment.
The quarry Röttbach is located in Lower Franconia and consists of very fine- to fine-grained, dark red sandstones that are of fluvial origin. Macroscopic observations reveal a homogenous, massive sandstone with few localized features like indistinct, tangential cross beds as well as clusters of silty to clayey rip up-clasts. A striking feature are bleaching phenomena that may occur pervasive, lamina-bound or speckled.
Petrophysical measurements yield φ-values of 11-19 % (avg. 16 %) while kh ranges from 0.02 to 48 mD (avg. 9 mD). Samples originate from three horizontal profiles of different stratigraphic height within the outcrop. ... mehr

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Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Vortrag
Publikationsjahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000126728
Veranstaltung DGMK/ÖGEW-Frühjahrstagung (2019), Celle, Deutschland, 25.04.2019 – 26.04.2019
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