Interrelations Between Thermal Conductivity and Other Physical Properties of Rocks: Experimental Data

Popov, Y.; Tertychnyi, Vladimir; Romushkevich, R.; Korobkov, Dmitry V.; Pohl, J.

doi:10.1007/978-3-0348-8083-1_21

Cited by 34 publications

(31 citation statements)

References 5 publications

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“…-Despite the fact that a number of authors have investigated the coupling between parameter relationships such as porosity-permeability, porosity-rock heat conductivity, e.g. [38,41,47], the combined parameter variabilities and their effects on reservoir evolution needs further investigation.…”

Section: Deficiencies and Outlookmentioning

confidence: 98%

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Uncertainty analysis of thermo-hydro-mechanical coupled processes in heterogeneous porous media

et al. 2009

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In this paper we present an uncertainty analysis of thermo-hydro-mechanical (THM) coupled processes in a typical geothermal reservoir in crystalline rock. Fracture and matrix are treated conceptually as an equivalent porous medium, and the model is applied to available data from the Urach Spa and Falkenberg sites (Germany). The finite element method (FEM) is used for the numerical analysis of fully coupled THM processes, including thermal water flow, advective-diffusive heat transport, and thermoelasticity. Non-linearity in system behavior is introduced via temperature and pressure dependent fluid properties. Reservoir parameters are considered as spatially random variables and their realizations are generated using conditional Gaussian simulation. The related Monte-Carlo analysis of the coupled THM problem is computationally very expensive. To enhance computational efficiency, the parallel FEM based on domain decomposition technology using message passing interface (MPI) is utilized to conduct the numerous simulations. In the numerical analysis we considered two reservoir modes: undisturbed and stimulated. The uncertainty analysis we apply captures both the effects of heterogeneity and hydraulic stimulation near the injection borehole. The results show the influence of parameter ranges on reservoir evolution during long-term heat extraction, taking into account fully coupled thermo-hydro-mechanical processes. We found that the most significant factors in the analysis are permeability and heat capacity. The study demonstrates the importance of taking parameter uncertainties into account for geothermal reservoir evaluation in order to assess the viability of numerical modeling.

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Section: Deficiencies and Outlookmentioning

confidence: 98%

“…A number of authors have investigated the coupling between parameters relationships such as relationships of permeability and porosity as well as porosity and rock heat conductivity [38,41,47].…”

Section: Assumptionsmentioning

confidence: 99%

Uncertainty analysis of thermo-hydro-mechanical coupled processes in heterogeneous porous media

et al. 2009

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“…The estimate assumes that conduction is the only heat transport mechanism through the solid crust, that lateral conduction can be neglected compared to vertical conduction, and that heat transport in the magma is fast compared to heat conduction through the overlying crust. A thermal conductivity of 2.0 Wm-'K-' (sce England &Thompson 1984;Thompson 1999;Popov et al 2003), a melting enthalpy of granite of 300 kJkg-' (Patiiio Douce et al 1990) and a density of 2.7.10' kgm-' are used. The intrusion level is set to 10 km and the crystallizing granite is taken to be 4 km thick occurring in a crust with a total thickness of 35 kni.…”

Section: Cooling Mid Cilterntioirmentioning

confidence: 99%

The geochemistry of the Sorvik granite—a TIB-1 granite

Lindh

2008

GFF

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The Sorvik granite occurs as rounded massifs in the Revsund granite in central Sweden. The rock is medium-grained with rounded quartz crystals ('drop quartz') and occasional, sometimes albiterimmed niegacrysts of K-feldspar. It is a faintly peraluminous I-type granite with some A-type affinities showing a limited chemical variation. The SiO, content normally varies between 68 and 77 weight%. The rock is fairly high in Rb and rather low in Ta, Nb, Sr and Ti. REE patterns are weakly differentiated with moderate negative Eu-anomalies. Chemically, the SGrvik granite is more similar to rapakivi granite than to the neighbouring Revsund granite. E~~ at the time of intrusion varies between -1.5 and 4.9. Zr-thermometry gives a minimum temperature around 800°C for the magma generation. The source rock is modelled as a granodioritic rock. Anhydrous melting due to biotite breakdown supplies insufficient amounts of water to meet a reasonable rheologically critical melt percentage. If the temperature estimate is correct, either low degrees of granitic melt might segregate from its place of origin, or some water was added during melting. A local, probably late-magmatic I;-metasomatism has caused a Nb-Ta-U-Th anomaly resulting in specific Nb minerals.

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“…They sum up that there is no general trend for correlations between thermal conductivity and other petrophysical properties and data scatter. An article by Popov et al (2003) gives an overview over some correlations for various rock types. They divided the rocks in 6 collections from different silt-sandstones, to limestone and cores from the scientific well "Nördlingen 1973" with granites, gneiss and amphibolite.…”

Section: Introductionmentioning

confidence: 99%

New approaches for the relationship between compressional wave velocity and thermal conductivity

Gegenhuber

Schoen

2012

Journal of Applied Geophysics

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Interrelations Between Thermal Conductivity and Other Physical Properties of Rocks: Experimental Data

Cited by 34 publications

References 5 publications

Uncertainty analysis of thermo-hydro-mechanical coupled processes in heterogeneous porous media

Uncertainty analysis of thermo-hydro-mechanical coupled processes in heterogeneous porous media

The geochemistry of the Sorvik granite—a TIB-1 granite

New approaches for the relationship between compressional wave velocity and thermal conductivity

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