Optimizing scenarios of a deep geothermal aquifer storage in the southern Upper Rhine Graben

Geothermal Energy

Science – Society – Technology

Table 1 Overview of the main formation and fluid parameters used in the numerical model

Formation	Muschelkalk	Buntsandstein	Top; bottom; intermediate	Fault	Well
Dimension	3	3	3	2	1
Porosity (−)	0.05	0.05	0.01	0.2	1
Permeability (m²)	5.74 × 10^–13	8.20 × 10^–14	8.20 × 10^–16	1.00 × 10^–10	1.0
Density (kg m⁻³)	2680	2200	2600; 2700; 2680	2600	1000
Specific heat capacity (J kg⁻¹ K⁻¹)	675	700	675; 750; 675	850	4193.5
Therm. conductivity (W m⁻¹ K⁻¹)	2.0	2.5	2.1; 2.3; 2.0	2.2	0.65
Fluid
Specific heat capacity (J kg⁻¹ K⁻¹)	4193.5
Therm. conductivity (W m⁻¹ K⁻¹)	0.65

The stratigraphic subdivisions of the top, bottom and intermediate units are shown in Fig. 5. Fluid parameters density ρ (kg m⁻³) and viscosity µ (kg m⁻¹ s⁻¹) are variables depending on temperature and pressure