Predictability of properties of a fractured geothermal reservoir: the opportunities and limitations of an outcrop analogue study

Bauer, Johanna F.; Krumbholz, Michael; Meier, Silke; Tanner, David C.

doi:10.1186/s40517-017-0081-0

Cited by 37 publications

(36 citation statements)

References 90 publications

(90 reference statements)

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“…Chang et al (2006) have shown that Young's modulus and UCS reduce with increasing porosity. The porosity for the Buntsandstein probes used in this study is low (PfSst 8% and TenSst 9%) compared to other reservoir sandstones (> 10%) (Chang et al 2006) but fits with data reported by Bauer et al (2017) for Buntsandstein analogs. To predict the failure, calculating the UCS, as initial failure strength under uniaxial loading, is important.…”

Section: Fig 9 Permeability Changes Due To Hydrostatic Loading Calcusupporting

confidence: 81%

“…Stresses between 35 and 75 MPa have been observed for the geothermal site of Soultzsous-Forêts and are expected in the Buntsandstein reservoir (Cornet et al 2007;Valley and Evans 2007). Analogs of the Buntsandstein are found in nearby outcrops, e.g., in the Vosges Mountains, the Kraichgau and the Black Forest (Eisbacher and Fielitz 2010;Bauer et al 2015Bauer et al , 2017.…”

Section: Upper Rhine Grabenmentioning

confidence: 97%

“…However, the data of Chang et al (2006) are in accordance with our samples of PfSst (123 MPa), TenSst (46 MPa) and VsSst (35 MPa), as well. Bauer et al (2017) report UCS values in the range of 80-100 MPa for the Buntsandstein in the northeast URG.…”

Section: Fig 9 Permeability Changes Due To Hydrostatic Loading Calcumentioning

confidence: 98%

“…Data characterizing the mechanical properties of different kind of high porous sandstones are collected by the oil industry and can be found in Chang et al (2006), Cuss et al (2003) and Wong et al (1997). Bauer et al (2017) show the UCS, Young's modulus and porosities of Buntsandstein analogs from the eastern URG. Triaxial experiments on Triassic Sandstone of the Vosges (VsSst) have been reported by Bésuelle (2001).…”

Section: Mechanical Characterizationmentioning

confidence: 99%

“…For the numerical evaluation, we assumed a homogeneous and non-fractured sandstone body for comparison reasons with analog studies (triaxial tests). This assumption is limited since first of all, the sedimentary rocks of the URG have strongly varying facies (Bauer et al 2017), leading to a substantial heterogeneity in the mechanical parameters, like UCS. Values between 35 and 123 MPa are reported for the Buntsandstein.…”

Section: Effects On Upscalingmentioning

confidence: 99%

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Triaxial testing and hydraulic–mechanical modeling of sandstone reservoir rock in the Upper Rhine Graben

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Background The determination of the subsurface conditions and reservoir properties is indispensable for exploration and exploitation of a geothermal field. It includes the expected geological structures as well as the hydraulic, thermal, chemical and mechanical parameters of the target horizon which should be favorable for geothermal utilization. Most essential is a high permeability to supply sufficient flow rates and high temperatures (Stober and Bucher 2012). An area in Germany which fulfills the criteria is the Upper Rhine Graben with a unique geothermal potential (Agemar et al. 2014). Local temperature anomalies with elevated temperatures up to 165 °C are expected at a depth of 2500 m, while the average geothermal gradient of the URG is above 40K km −1 (Agemar et al. 2013). Especially the sedimentary formation of the Triassic, Buntsandstein and Muschelkalk shows high permeabilities, which are necessary to provide high flow rates (Stober and Bucher 2014).

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Section: Fig 9 Permeability Changes Due To Hydrostatic Loading Calcusupporting

confidence: 81%

Section: Upper Rhine Grabenmentioning

confidence: 97%

Section: Fig 9 Permeability Changes Due To Hydrostatic Loading Calcumentioning

confidence: 98%

Section: Mechanical Characterizationmentioning

confidence: 99%

Section: Effects On Upscalingmentioning

confidence: 99%

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Triaxial testing and hydraulic–mechanical modeling of sandstone reservoir rock in the Upper Rhine Graben

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Determining the most representative reservoir model for the shallow depth salihli geothermal reservoir in Turkey using tracer test

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Digital Rock Approach to Model the Permeability in an Artificially Heated and Fractured Granodiorite from the Liquiñe Geothermal System (39°S)

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Predictability of properties of a fractured geothermal reservoir: the opportunities and limitations of an outcrop analogue study

Cited by 37 publications

References 90 publications

Triaxial testing and hydraulic–mechanical modeling of sandstone reservoir rock in the Upper Rhine Graben

Triaxial testing and hydraulic–mechanical modeling of sandstone reservoir rock in the Upper Rhine Graben

Determining the most representative reservoir model for the shallow depth salihli geothermal reservoir in Turkey using tracer test

Digital Rock Approach to Model the Permeability in an Artificially Heated and Fractured Granodiorite from the Liquiñe Geothermal System (39°S)

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