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Figure 3 | Geothermal Energy

Figure 3

From: Inferring the in situ stress regime in deep sediments: an example from the Bruchsal geothermal site

Figure 3

Comparison of existing stress-depth relationships and stress ratios for the geothermal sites of Bruchsal and Soultz. Stress magnitudes of SHmax(A) and Shmin(B) are normalized by Sv. The stress profiles of Greiner and Rummel and Baumgärtner are based on the combination and linear extrapolation of stress magnitudes obtained from near surface hydro frac and overcoring measurements. The Soultz stress profiles from Cornet et al. ([2007]) and Valley and Evans ([2007]) are based on evaluations of large-scale injection experiments and interpretations of borehole breakouts in the deep crystalline reservoir of Soultz.

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