3D model of fracture zones at Soultz-sous-Forêts based on geological data, image logs, induced microseismicity and vertical seismic profiles

Sausse, Judith and Dezayes, Chrystel and Dorbath, Louis and Genter, Albert and Place, Joachim (2010) 3D model of fracture zones at Soultz-sous-Forêts based on geological data, image logs, induced microseismicity and vertical seismic profiles. Comptes Rendus Geoscience, 342 (7-8). pp. 531-545. DOI: https://doi.org/10.1016/j.crte.2010.01.011

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Official URL: http://doi.org/10.1016/j.crte.2010.01.011

Abstract

This study presents a new deterministic 3D model of the fracture zones observed in the granitic reservoir of the Soultz European geothermal project. The major fracture zones encountered around 6 wells (4550, EPS1, GPK1, GPK2, GPK3 and GPK4) consist in 53 main structures that are located and characterized in terms of size and orientation: 39 fracture zones, 8 microseismic structures and 6 structures derived from vertical seismic profiles are represented in the 3D model using Discrete Fracture Network tools of the gOcad modelling platform (Paradigm™, Earth Decision™). This work illustrates the complexity of 3D fracture zone correlation and interpretation in crystalline rock masses characterized at meter scale (borehole) and at the reservoir scale (kilometer) thanks to geophysical imaging techniques.

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Item Type: Article
Uncontrolled Keywords: Deterministic fractures; Fault; 3D model; Soultz geothermal reservoir; Well logs; Induced microseismicity; Vertical Seismic Profile; France
Subjects: Methodology > Method and procesing > Collective properties of seismicity
Methodology > Other-additional study
Region > France > Soultz-sous-Forets
Inducing technology > Geothermal energy production
Project: EPOS-IP > SOULTZ-SOUS-FORETS: stimulation and production of geothermal energy