Porosity network and transfer properties of geothermal formation :Importance of damage zones around faults and fractures
Géraud Yves, Rosener Michel, Place Joachim
Institut de Physique du Globe de Strasbourg Equipe de Physique des matériauxUMR 7516, Université Louis Pasteur-CNRS
Strain and rheology of fracture and fault zones
Petrophysical data
GeologyPetrographyMineralogystructure
PorosityPermeabilityThermal conductivity
Strain StressTemperature time
Intrinsic properties
Rheologic modelTHM Code_bright
PYGARKI Fault
Hanging wall
Gouge or cataclasites
Transport through Soultz/forêts granite
Mass fluxes Fluid fluxes Thermal fluxes
CalciteQuartz
Illite
-40
-30
-20
-10
0
10
20
30
40
50
60
0.25 0.5 0.75 1 1.25 1.5 1.75Facteur de volume
Gains et pertes (en g/ 100 g de biotite)
SiO2 Al2O3 FeO MnO TiO2 MgO K2O Na2O CaO CO2 H2O
isochimique
isovolumique
From mineralogical and geochemical analysis
Physico-chemical model of transport
Rh : 10-12 m
Rh : 10-14 m
K109
2.56 W/mK
1,8
2
2,2
2,4
2,6
2,8
3
From the sample to the mineral scale
Thermalconductivity by optical scanning
X-ray tomodensitometry
Transport through Soultz/forêts granite
Experimental and numerical model of the fluid-rock interaction around a fracture
Fracture
Granit with damage zone
Fluid flow
Mass flux measurementThermal flux measurment
Experimental tests under X-ray tomodensitometryNumerical tests under kindis, Kirmat and Code bright models
L ’ oligo-miocen to actual extension W Europe, France- Spain
Actual extension : East Europ, Greece Turkey
Area of investigation