Skip to main content
Geothermal Energy

Science – Society – Technology

Fig. 14 | Geothermal Energy

Fig. 14

From: Stress sensitivity of porosity and permeability under varying hydrostatic stress conditions for different carbonate rock types of the geothermal Malm reservoir in Southern Germany

Fig. 14

Normalized porosity (a) and permeability (b) as a function of Terzaghi effective pressure for different lithologies. The compaction-induced stress sensitivity decreases with increasing dolomitization. The stress sensitivity coefficients \(c\) and \(b\) were found by best exponential fitting for each group and used as input for the effective stress models. The error bars represent the minimum and maximum values of the measured samples within the specific group—the data points are average values

Back to article page