Abstract
The reservoir quality of the Early Triassic Bunter Sandstone Formation in southern Denmark is generally good, but locally variations in mineralogy and diagenesis may lower the porosity and permeability drastically.
The reservoir properties are influenced by both the composition of the originally deposited sediment (the detrital mineralogy) and by the subsequent dissolution-precipitation processes resulting in various types of cementations (the authigenic mineralogy).
Iron oxide/hydroxide coatings are commonly present, and they help preserve the primary porosity. Anhydrite, carbonate and halite cements, as well as clay clasts and intra-granular clay, reduce the reservoir quality in different degrees.
There is an overall trend of positive correlation between grain size, porosity and permeability.
The reservoir properties are influenced by both the composition of the originally deposited sediment (the detrital mineralogy) and by the subsequent dissolution-precipitation processes resulting in various types of cementations (the authigenic mineralogy).
Iron oxide/hydroxide coatings are commonly present, and they help preserve the primary porosity. Anhydrite, carbonate and halite cements, as well as clay clasts and intra-granular clay, reduce the reservoir quality in different degrees.
There is an overall trend of positive correlation between grain size, porosity and permeability.
| Original language | English |
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| Title of host publication | Proceedings of the European Geothermal Congress, Pisa, 2013 |
| Publisher | European Geothermal Energy Council |
| Number of pages | 3 |
| Publication status | Published - 2013 |
| Event | European Geothermal Congress 2013 - Pisa, Italy Duration: 3 Jun 2013 → 7 Jun 2013 |
Conference
| Conference | European Geothermal Congress 2013 |
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| Country/Territory | Italy |
| City | Pisa |
| Period | 3/06/13 → 7/06/13 |
Programme Area
- Programme Area 3: Energy Resources