| Autor: |
Catherine Dorbath, M. Adelinet, L. Dorbath, Marco Calò, M. Le Ravalec |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Scopus-Elsevier |
| ISSN: |
2214-4609 |
| Popis: |
The recent new tomography results obtained within the scope of the Enhanced Geothermal System (EGS) European Soultz project led us to revisit the meso-fracturation features of the reservoir. In this paper, we develop a novel approach based on effective medium modeling to characterize the evolution of crack properties all along the hydraulic stimulation process. The stimulation experiment performed in 2000 actually consisted of 3 successive injection steps. An accurate 4-D tomography was previously conducted using the travel-times measured for the induced seismicity. The present study focuses on the exploitation of the resulting P-wave and S-wave velocity models. They are given as input data in an effective medium model and converted into crack properties. The effective medium model refers to a crack-free matrix and 2 families of penny-shaped cracks whose orientations are in agreement with geological features. The resulting output data are the spatial distribution of crack aspect ratios within the 3-D reservoir. This study emphasizes the added value of the coupling between effective medium modelling and geophysical studies to monitor meso-scale cracks in reservoirs submitted to hydraulic stimulation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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