Estimation of Fracture Energy from Hydraulic Fracture Tests on Mortar and Rocks at Geothermal Reservoir Temperatures
| Autor: | Christian La Borderie, Alberto Varela Valdez, Moisés Hinojosa Rivera, Gilles Pijaudier-Cabot, Omar Rodríguez Villarreal |
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| Přispěvatelé: | Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME), Université de Pau et des Pays de l'Adour (UPPA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Petroleum engineering
business.industry Geothermal energy 0211 other engineering and technologies Energy balance Geology Fracture mechanics 02 engineering and technology 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology Enhanced geothermal system 01 natural sciences 7. Clean energy Permeability (earth sciences) [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Hydraulic fracturing Heat exchanger Fracture (geology) business ComputingMilieux_MISCELLANEOUS 021101 geological & geomatics engineering 0105 earth and related environmental sciences Civil and Structural Engineering |
| Zdroj: | Rock Mechanics and Rock Engineering Rock Mechanics and Rock Engineering, Springer Verlag, 2021, 54 (8), pp.4111-4119. ⟨10.1007/s00603-021-02496-x⟩ |
| ISSN: | 0723-2632 1434-453X |
| DOI: | 10.1007/s00603-021-02496-x⟩ |
| Popis: | An Enhanced Geothermal System (EGS) can be thought of as an underground heat exchanger designed to extract geothermal energy. The performance of these systems can be improved by increasing permeability with hydraulic fracturing, following the same technique used for hydrocarbon reservoirs. To understand hydraulic fracturing, whether it is implemented in an EGS or in a hydrocarbon reservoir, it is important to know the fracture parameters of the rock at stake, e.g., the fracture energy. We report here the use of a method based on an energy balance during hydraulic fracture tests. Specimens were prepared and they have been mechanically and hydromechanically characterized at 20 oC and 100 oC, a temperature representative of actual reservoir conditions. The fracture energy is obtained from a balance of kinetic, potential and pressure energies involved in the hydraulic fracture tests. The method provides fracture energies that are consistent with the literature data on similar materials. It is also found that the fracture energy increases upon heating. |
| Databáze: | OpenAIRE |
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