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Title: Induced seismicity in pressurised single fractures: a numerical approach
Author: Piris, G.
Griera, Albert
Gómez Rivas, Enrique
Herms, I.
Goula Suriñach, Xavier
Keywords: Sismologia
Energia geotèrmica
Geothermal resources
Issue Date: 25-Nov-2016
Publisher: Sociedad Geológica de España
Abstract: The exploration and exploitation of deep geothermal reservoirs has significantly increased during the last years. These reservoirs use heat exchange to produce heat or electricity. The so-called Enhanced Geothermal Systems (EGS) are characterized by a stimulation phase that aims to increase fluid flow and heat transfer between wells by increasing the permeability and transitivity of the reservoir. This is achieved by injecting high-pressure fluids (normally water) in order to increase the apertures of existing fractures, enhancing their sliding and/or generating new ones. However, this technique induces low-magnitude seismicity that occasionally results in damage at the Earth's surface. Numerical simulations able to reproduce the hydro-thermo-mechanical behaviour of geological reservoirs are an essential tool for the evaluation and forecasting of induced seismicity in such systems. In this study, the numerical code CFRAC is used to systematically evaluate how the orientation of faults with respect to the stress field influences seismicity, the injection rate and the fracture sliding behaviour.
Note: Reproducció del document publicat a:
It is part of: Geogaceta, 2016, vol. 61, p. 95-98
ISSN: 0213-683X
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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