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The impact of pore-occluding cementation and chemical compaction on the reservoir quality of deeply buried sandstones

Monsees, Alexander C.; Busch, Benjamin; Hilgers, Christoph

Abstract (englisch):
Authigenic quartz cementation and chemical compaction can have a deteriorating effect on the flow properties of potential reservoirs. The prediction of reservoir quality in sandstones can depend on grain coat coverage, authigenic cement types, and on the time exposed to various temperatures and thus the subsidence history. The deterioration of a reservoir due to compaction and cementation can thus be modeled and predicted (Busch et al. (2018); Lander and Bonell (2010); Lander et al. (2008)). Based on a Rotliegend case study from two wells (5200-5500 m) in Northern Germany, we present a workflow to assess porosity-permeability trends in siliciclastic reservoir rocks.

55 thin sections were sampled from core material to quantify the porosity, mineralogy, quartz cementation and grain coating coverage. The porosity and permeability of related core plugs was measured to obtain reservoir-related flow data. The modeled subsidence history of the reservoir plays an important role to predict the amount of cementation (Busch et al. (2018); Becker et al. (2017)).

Our samples mainly consist of sublitharenites, feldspathic litharenites and litharenites after Folk (1980). ... mehr



Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Poster
Publikationsjahr 2018
Sprache Englisch
Identifikator KITopen-ID: 1000126716
Veranstaltung 6th European Geothermal Workshop (EGW 2018), Straßburg, Frankreich, 10.10.2018 – 11.10.2018
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