Thermal conditions of the central Sinai Microplate inferred from new surface heat-flow values and continuous borehole temperature logging in central and southern Israel

Schütz, F.; Förster, Hans‐Jürgen; Förster, Andrea

doi:10.1016/j.jog.2014.02.010

Cited by 12 publications

(18 citation statements)

References 88 publications

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“…In a sedimentary basin in which heat transfer is mostly driven by conduction, heat flow density should remain approximately constant with depth (Andrews-Speed et al 1984;Schütz et al 2014). Therefore, examining the vertical heat flow density variations with depth at Soultz-sous-Forêts and Rittershoffen should enable us to investigate conductive equilibrium down the geothermal wells.…”

Section: Evolution Of the Heat Flow Density With Depthmentioning

confidence: 99%

“…Located in the northeastern part of France and southwestern part of Germany (Fig. 1), this continental rift is already home to several operational (e.g., Soultz-sous-Forêts and Rittershoffen, both France, and Bruchsal, Insheim and Landau, all in Germany) and planned (e.g., Illkirch, Vendenheim, and Wissembourg, all France) geothermal sites (Aichholzer et al 2016;Vidal and Genter 2018), but accurate estimates of heat flow density remain crucial for temperature estimations prior to drilling operations and thermodynamic models that inform our understanding of measured temperature profiles for continued geothermal exploration (Beardsmore et al 2001;Flores Marquez 1992;Frone et al 2015;Schütz et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Heat flow density estimates in the Upper Rhine Graben using laboratory measurements of thermal conductivity on sedimentary rocks

et al. 2019

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The Upper Rhine Graben (URG) has been extensively studied for geothermal exploitation over the past decades. Yet, the thermal conductivity of the sedimentary cover is still poorly constrained, limiting our ability to provide robust heat flow density estimates. To improve our understanding of heat flow density in the URG, we present a new large thermal conductivity database for sedimentary rocks collected at outcrops in the area including measurements on (1) dry rocks at ambient temperature (dry); (2) dry rocks at high temperature (hot) and (3) water-saturated rocks at ambient temperature (wet). These measurements, covering the various lithologies composing the sedimentary sequence, are associated with equilibrium-temperature profiles measured in the Soultz-sous-Forêts wells and in the GRT-1 borehole (Rittershoffen) (all in France). Heat flow density values considering the various experimental thermal conductivity conditions were obtained for different depth intervals in the wells along with average values for the whole boreholes. The results agree with the previous heat flow density estimates based on dry rocks but more importantly highlight that accounting for the effect of temperature and water saturation of the formations is crucial to providing accurate heat flow density estimates in a sedimentary basin. For Soultz-sous-Forêts, we calculate average conductive heat flow density to be 127 mW/m 2 when considering hot rocks and 184 mW/m 2 for wet rocks. Heat flow density in the GRT-1 well is estimated at 109 and 164 mW/m 2 for hot and wet rocks, respectively. Results from the Rittershoffen well suggest that heat flow density is nearly constant with depth, contrary to the observations for the Soultz-sous-Forêts site. Our results show a positive heat flow density anomaly in the Jurassic formations, which could be explained by a combined effect of a higher radiogenic heat production in the Jurassic sediments and thermal disturbance caused by the presence of the major faults close to the Soultz-sous-Forêts geothermal site. Although additional data are required to improve these estimates and our understanding of the thermal processes, we consider the heat flow densities estimated herein as the most reliable currently available for the URG.

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Section: Evolution Of the Heat Flow Density With Depthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat flow density estimates in the Upper Rhine Graben using laboratory measurements of thermal conductivity on sedimentary rocks

et al. 2019

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“…Slightly larger values of 2.83.0 W m 1 K 1 were determined for mafic granulites from the Arabian Shield in Jordan (Förster et al, 2010). Calculation of bulk TC (using λHM and mean TCs for minerals) for a suite of partially reequilibrated, weakly porous (porosity: 38 %) and microcrack-penetrated mafic granulites from the northern Arabian Shield in Israel studied by Schütz et al (2014) …”

Section: Thermal Conductivity Of the Continental Lower Crustmentioning

confidence: 99%

Tracking the thermal properties of the lower continental crust: Measured versus calculated thermal conductivity of high-grade metamorphic rocks (Southern Granulite Province, India)

Ray

Förster

et al. 2015

Geothermics

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“…The effect of faciesdependent TC variability is further consolidated by the detailed analysis of temperature logs (e.g. Fuchs and Förster, 2010;Sippel et al, 2013;Schütz et al, 2012aSchütz et al, , 2014Fuchs et al, 2015) as well as modelling results (e.g. Ollinger et al, 2010) which demonstrated that considering lateral varying TC values results in an improved fit between measured and modelled temperatures.…”

Section: Introductionmentioning

confidence: 97%

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 1: Uncertainty analysis of the thermal-conductivity parameterization

Fuchs

Balling

2016

Geothermics

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Thermal conditions of the central Sinai Microplate inferred from new surface heat-flow values and continuous borehole temperature logging in central and southern Israel

Cited by 12 publications

References 88 publications

Heat flow density estimates in the Upper Rhine Graben using laboratory measurements of thermal conductivity on sedimentary rocks

Heat flow density estimates in the Upper Rhine Graben using laboratory measurements of thermal conductivity on sedimentary rocks

Tracking the thermal properties of the lower continental crust: Measured versus calculated thermal conductivity of high-grade metamorphic rocks (Southern Granulite Province, India)

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 1: Uncertainty analysis of the thermal-conductivity parameterization

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