Modeling of Fluid Transport in Geothermal Research

Jörg Renner () and Holger Steeb ()
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Jörg Renner: Ruhr-Universität Bochum, Experimentelle Geophysik - Institut für Geologie, Mineralogie und Geophysik
Holger Steeb: Ruhr-Universität Bochum, Kontinuumsmechanik - Mechanik

A chapter in Handbook of Geomathematics, 2015, pp 1443-1505 from Springer

Abstract: Abstract Extraction of heat stored in the rocks in Earth’s upper crust requires a fluid to which the heat can be transferred and that can migrate through the conduits in the rock. Flow of these fluids requires gradients in fluid pressure. Often, a linear relation between flow rate and pressure gradient offers a sufficiently precise description. Fluid pressure in turn couples the flow with the deformation of the solid host. We derive and analyze the governing equations underlying these hydro-mechanical, coupled problems. Our presentation addresses simple conduits and porous media. The latter are tackled from a continuum perspective, specifically mixture theory. Analytical and numerical solutions of the differential equations are analyzed for scenarios from well testing to propagation of elastic waves. Well testing constitutes the traditional tool for hydraulic characterization of geothermal reservoirs. Evaluation of attenuation of elastic waves may allow for hydraulic characterization and monitoring relying on surveys.

Keywords: Hydro-mechanical Coupling; Specific Storage Capacity; Poro-elastic Medium; Continuum Mixture Theory; Hydraulic Conduits (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-54551-1_81

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DOI: 10.1007/978-3-642-54551-1_81

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