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Structural and Diagenetic Controls on Reservoir Quality of Tight Formations

Becker, Ivy; Busch, Benjamin; Koehrer, Bastian; Hilgers, Christoph

Abstract (englisch):
The Upper Carboniferous fluvial sandstones and Zechstein Ca2 carbonates represent important hydrocarbon reservoir units in the Lower Saxony Basin, NW Germany, with production of more than four decades and a great exploration potential. In those tight, gasproducing
formations, significant exploration and development risks are attributed to their spatial variability of reservoir quality due to depositional heterogeneities, variations in their structural characteristics and the presence of temperature anomalies. With a focus on the
Upper Carboniferous sandstones, this study compares three outcrops in the southern part of the Lower Saxony Basin with analogous reservoirs situated approximately 50 km to the north. Petrophysical and petrographic data sets are linked to the burial history of the sandstones to derive control factors on the reservoir quality evolution.
Results indicate similar matrix permeabilities of two outcrops and the two studied reservoirs (field A and B) but matrix porosities vary. Such differences can be related to differences in their burial histories. Higher matrix porosities of field B compared to field A are explained by a lower amount of quartz cementation as the result of stronger basin inversion related uplift of field B. ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Vortrag
Publikationsjahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000126726
Veranstaltung DGMK/ÖGEW-Frühjahrstagung (2019), Celle, Deutschland, 25.04.2019 – 26.04.2019
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