wellbore logs in rittershoffen, alsace: acquisition ... · wellbore logs in rittershoffen, alsace:...
TRANSCRIPT
![Page 1: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/1.jpg)
Wellbore logs in Rittershoffen, Alsace:
acquisition, analysis and integration
for fractured reservoir characterization
Giovanni Sosio, Andreia Mandiuc, Annalisa Campana, Schlumberger
Jeanne Vidal, Régis Hehn, ES Géothermie
SPWLA France – Technical Session
Paris, SGF, 27 November 2018
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The ECOGI project in Rittershoffen, Alsace
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The ECOGI project in Rittershoffen, Alsace
![Page 4: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/4.jpg)
The ECOGI project in Rittershoffen, Alsace
![Page 5: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/5.jpg)
Log acquisition in Rittershoffen
![Page 6: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/6.jpg)
Log acquisition in Rittershoffen
![Page 7: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/7.jpg)
Log acquisition in Rittershoffen
![Page 8: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/8.jpg)
Log acquisition in Rittershoffen
![Page 9: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/9.jpg)
Log acquisition in Rittershoffen
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1500 m of ultrasonic images analyzed in GRT-1 and GRT-2
360 individual fractures observed in both wells
GRT-1: N10°E to N20°E steeply dipping westward
GRT-2: N160°E to N-S steeply dipping eastward
Geological interpretation: natural fractures
![Page 11: Wellbore logs in Rittershoffen, Alsace: acquisition ... · Wellbore logs in Rittershoffen, Alsace: acquisition, analysis and integration for fractured reservoir characterization Giovanni](https://reader030.vdocuments.mx/reader030/viewer/2022040913/5e892e11f615836cfa2d67da/html5/thumbnails/11.jpg)
1500 m of ultrasonic images analyzed in GRT-1 and GRT-2
360 individual fractures observed in both wells
GRT-1: N10°E to N20°E steeply dipping westward
GRT-2: N160°E to N-S steeply dipping eastward
Fracture orientation more homogeneous in GRT-1: GRT-2 collinear to the main fault intersects fractures with different orientations
(Vidal et al., EGC 2016)
Geological interpretation: natural fractures
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Alte
red
Gra
nite
Fa
ult
Co
reF
resh G
ranite
Permeable fracture zonesassociated to total mud lossesand negative thermal anomaly
Geological interpretation: natural fracture permeability
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Permeable fracture zonesassociated to total mud lossesand negative thermal anomaly
Less than 3% of fractures in GRT-1and 1% in GRT-2 are permeable
Geological interpretation: natural fracture permeability
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K
U
B
G
M
Computation of mechanical propertiesand stress magnitude based on sonic (DT, DTS) and density logs
Geomechanical interpretation: wellbore stability
GRT-1
Mechanical properties and stress
from input logs (density and sonic)
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K
U
B
G
M
Observed events
Computation of mechanical propertiesand stress magnitude based on sonic (DT, DTS) and density logs
Stress orientation derived from drilling-induced tensile fractures(Hehn et al., EGC 2016)
“Mechanical earth model” validated against observedwellbore stability events(drilling-induced fracturesfrom wellbore images and ovalization from caliper)
Geomechanical interpretation: wellbore stability
GRT-1
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K
U
B
G
M
Geomechanical interpretation: wellbore stability
GRT-1
Computed critical mud weights
compared with actual mud weight
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K
U
B
G
M
Observed events
Geomechanical interpretation: wellbore stability
GRT-1
Synthetic events
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Geomechanical interpretation: wellbore stability
K
U
B
G
M
Impact of thermal stresses
GRT-1
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Geomechanical interpretation: wellbore stability
0.95 g/cc 2.15
K
L
B
M
G
GRT-2 (prediction)
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Geomechanical interpretation: wellbore stability
0.95 g/cc 2.15
K
L
B
M
G1.25 g/cc 1.50
Critical breakout mud weight
GRT-2 (prediction)
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From data acquisition to modeling
- Wireline Logging, LWD
> Petrophysical
> Acoustic
> Imaging
- 2D/3D Seismic,EM, Gravimetry
- Well tests
- Core data
- Drilling data
SUITABLE INPUTS
- Inputs QC
- Integration in a single platform
- Advanced processing and interpretation
DATA INTEGRATION
- Build 3D static model:
> geological structure
> rock properties
> fracture network
- Model dynamic behavior:> production/injection
> heat flow and temperature changes
> stress and strain
ANALYSIS & MODELLING
- Well placement/design
- Completion optimization
> Casing/tubing size
> Optimum flow rates
> Stimulation design
- Risk mitigation
> Drilling risks
> Well integrity
> Subsidence
> Induced seismicity
APPLICATION & DESIGN
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Integrated geothermal modelling workflow
Seismic data
Drilling data
Logs & offset well info
Structural model
Well test data
Microseismic data
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Integrated geothermal modelling workflow
Seismic data
Drilling data
Logs & offset well info
Structural model
Petroph. & image interp
ba d ec
Losses
K
U
B
G
M
1D MEM
Well test data
Microseismic data
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Integrated geothermal modelling workflow
Seismic data
Drilling data
Logs & offset well info
Structural model
Inversion
Petroph. & image interp
Geological model
DFN
ba d ec
Losses
K
U
B
G
M
1D MEM
Well test data
Microseismic data
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Integrated geothermal modelling workflow
Seismic data
Drilling data
Logs & offset well info
Structural model
Inversion
Petroph. & image interp
Geological model
DFN
ba d ec
Losses
K
U
B
G
M
1D MEM
Flow model
Well test data
Microseismic data
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Integrated geothermal modelling workflow
Seismic data
Drilling data
Logs & offset well info
Structural model
Inversion
Petroph. & image interp
Geological model
DFN
ba d ec
Losses
K
U
B
G
M
1D MEM
Flow model
3D MEM
Well test data
Microseismic data
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Discrete fracture networkusing image interpretationand structural model –tectonic-based approach
Integration and modeling: natural fractures
Input – image log interpretation
and structural model
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Discrete fracture networkusing image interpretationand structural model –tectonic-based approach
Integration and modeling: natural fractures
Geomechanical engine
identifies stress regime
linked to observed faults/fractures
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Discrete fracture networkusing image interpretationand structural model –tectonic-based approach
Integration and modeling: natural fractures
Geomechanical engine
identifies stress regime
linked to observed faults/fractures
Resulting DFN
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Mechanical properties propagated based on 2D seismic inversion
FEM stress simulation to identifycritically stressed fracturesand forecast induced seismicity
Integration and modeling: geomechanical model
Acoustic impedance
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Mechanical properties propagated based on 2D seismic inversion
FEM stress simulation to identifycritically stressed fracturesand forecast induced seismicity
Integration and modeling: geomechanical model
Acoustic impedance
Stress tensor
Stress rotation due to geological structure
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Integration and modeling: geomechanical model
Plastic strain
(irreversible deformation)
= fault reactivation
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Estimated microseismic events
Integration and modeling: geomechanical model
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Estimated microseismic events
Measured microseismic events
Integration and modeling: geomechanical model
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Accurately designed log acquisition plan:wellbore images and dipole sonic logs from surface
Detailed analysis of natural fracture geometryand of mechanical properties
Conclusions
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Accurately designed log acquisition plan:wellbore images and dipole sonic logs from surface
Detailed analysis of natural fracture geometryand of mechanical properties
Integration of different domain data(images and temperature; sonic and images; etc.)
Insight on reservoir behavior (permeability, stress…)
Conclusions
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Accurately designed log acquisition plan:wellbore images and dipole sonic logs from surface
Detailed analysis of natural fracture geometryand of mechanical properties
Integration of different domain data(images and temperature; sonic and images; etc.)
Insight on reservoir behavior (permeability, stress…)
Multi-disciplinary 3D model (geological, fluid flow and geomechanical) based on the above
Understanding of site performance and risks
Conclusions
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Thanks for your attention!
Many thanks to Charidimos Spyrou, Oleksandr Burachok, Ann-Sophie Boivineau,
Claudia Sorgi, Vincenzo De Gennaro, Karsten Fischer, Clément Baujard, Albert Genter
slb.com geothermie.es.fr
Data kindly provided by the ECOGI consortium
Modeling software used courtesy of Schlumberger
Acknowledgments