WP3/WP6 meeting
Investigation of Unconventional
Geothermal Resources and in particular
Enhanced Geothermal Systems
Conveners A. Manzella & Th. Kohl
BRGM
Engine Launching Conference
12-15 February 2006
Orléans, France
Session 3
BRGM
WP3 / WP6 Meeting
Welcome in Orléans
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BRGM Map
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Outline
> BRGM Presentation
> ENGINE Contract
> BRGM Geothermal activities
> WP3/WP6
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BRGM
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Major public institution in the Geoscience field.
Triple role of scientific research, public expertise and
international cooperation
BRGM operates as the French Geological Survey
Objectives
Understand geological phenomena, develop new
methodologies and techniques, produce and
disseminate pertinent, high-quality data
Provide the necessary tools for public policies
concerning surface, subsurface and natural-resource
management, natural-risk and pollution prevention,
and regional development and planning
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8 thematic areas: www.brgm.fr
Mineral resources
Water
Development planning and natural risks
Contaminated land and waste management
Environmental metrology
Mapping and geoinformation
Geothermal energy and geological storage of
CO2
Digital information systems
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BRGM Staff
844 employees, including more than 600
scientists, engineers and technicians
29 regional offices in metropolitan France and
its Overseas Departments and Territories
Teams working in more than 40 countries
Turnover for 2003: €81.49 million
Legal status: A public institution with industrial
and commercial interests under the joint
supervision of the Ministry for Research,
the Ministry for Industry and the Ministry for
Environment.
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Research
C. FOUILLAC
General Secretary
R. GUERILLON
Public Service
L. BEROUD
General Inspectorate
P.L KIRCHER
Chairman
Ph. VESSERON
International
J.C. GUILLANEAU
Human Resources
M. BOUILLEAU
Managing Director
D. Houssin
Accounting
J.P. RIBERT
Production, Informatics
and Quality
F. LELANN
Communications and
Publications
G. LEHIDEUX-VERNIMMEN
Strategic Planning
J. VARET
Operational Divisions
Geology
and
Geoinformation
Mineral
Resources
D. VASLET
J. TESTARD
Development
Planning and
Natural Risks
Water
Environment
and
Processes
Information
Systems and
Technologies
Analysis and
Mineral
Characterisation
H. MODARESSI D. PENNEQUIN D. DARMENDRAIL J.M. TROUILLARD A. M. FOUILLAC
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Regional
Geological
Surveys
M. BEURRIER
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Geological map of France at 1:50,000
1060 maps (92% maps published)
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ENGINE Contract N°019760
> Contract signed by ENGINE partners
sent to the Commission on 23/12/05
> Contract signed by the Commission on
06/02/06
> According to the contract the prefinancing will be made within 45 days
from the date of the Commission's
signature (before 21/03/06)
> Administrative questions: A. Beauce
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BRGM main geothermal activities
2005
2006
2007
Fundings
EGS Pilot Plant : Soultz
Europe, 6FP, Ademe
High enthalpie project : DOM
Ademe,
Feder, Régions
ENGINE (EGS) & I-GET (Geophysical exploration)
Europe, 6FP
Low geothermal energy projects
Ademe, Arene,
EDF, Régions
Very low geothermal energy projects
Europe, Ademe
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Heat & vapor
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WP3/WP6: Investigation of Unconventional Geothermal
Resources and in particular Enhanced Geothermal
Systems
• Integration of recent progress in knowledge concerning the
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European lithosphere
Mechanical behaviour of the upper crust and its response to
stress, fluid circulation and heat-flow gradients
Exploring different types of geothermal reservoir
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High-energy geothermal fields (active/recent volcanism and
peripheral zones)
High-temperature / low-permeability reservoirs (hot dry rocks)
New deep, and possibly supercritical, geothermal reservoirs
Multipurpose geothermal reservoirs
Technological challenge of the investigation phase
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Improved exploration methods for deep geothermal resources
Combined geological and geophysical imaging methods for
defining and assessing reservoirs for potential heat exchange
3D modelling and imaging of permeable systems
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BRGM experience in geothermal exploration
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Geophysical exploration (H. Fabriol)
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Resistivity survey Ex. Bouillante
Gravity Magnetic studies
Geochemical exploration (B. Sanjuan)
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Gas survey (CO2, CH4, Helium) (La Réunion, Bouillante)
Borehole fluid monitoring (Soultz, Bouillante, Martinique)
Fluid composition (Chemistry, isotopic chemistry)
Geological exploration (A. Genter & H. Traineau)
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Volcanic and structural studies (La Réunion, Martinique,
Bouillante, Dominique)
Hydrothermal alteration (Bouillante, Soultz, Martinique)
Borehole monitoring (Soultz, Urach, Martinique, Bouillante)
Borehole imagery techniques (Soultz)
Well logging in granite (Soultz)
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Application of geophysics to geothermal resources at BRGM
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More than 25 years of experience into geothermal exploration in volcanic,
granitic and sedimentary context
• Lesser Antilles, La Réunion, Milos, El Salvador, etc.
• Paris Basin and Limagne Basin
• Soultz-sous-Forêts (France)
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Tools developed :
• Potential methods (gravity, magnetism)
• Electrical resistivity: DC and EM, MT
• Passive seismic: microseismicity and broadband for exploration and exploitation
• Marine seismic (shallow depth)
• Monitoring surface deformations: microgravity and SAR Interferometry
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Meetings to be attended : Potsdam (Workshop 1), Pisa (Workshop 2) and Zürich
(Workshop 3)
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Exchange of personnel : ??
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Contact: h.fabriol@brgm.fr
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Resistivity cross section at Bouillante (H. Fabriol)
Fabriol et al., WGC05
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Fracture analysis at Soultz
Fractures collected from highresolution oriented image logs
› about 14 km of image logs analysed
Amplitude
Transit time
Dezayes et al.,
WGC05
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3D modelling and geothermics
> Bouillante, Guadeloupe, Volcanic
formations
> Limagne, North Massif Central, Clastic
reservoirs
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3D Model at Bouillante (B. Sanjuan)
EarthVision
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Thermal model & permeable zones at Bouillante
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Limagne Model: clastic reservoirs
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3D model of clastic reservoirs: sandstones-sands
Reservoirs
Age
(Ma) Sequences
Stages
Levels
Chattian
Upper Oligocene
Rupelian
Lower Oligocene
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S4
28
S3
34
S2
40
Priabonian
Upper Eocene
Bartonian
S1
46
<300
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Lutetian
Middle Eocene
Basement
Ante Tertiary
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WP3/WP6: Investigation of Unconventional Geothermal
Resources and in particular Enhanced Geothermal
Systems
• Integration of recent progress in knowledge concerning the
•
•
•
European lithosphere
Mechanical behaviour of the upper crust and its response to
stress, fluid circulation and heat-flow gradients
Exploring different types of geothermal reservoir
–
–
–
–
High-energy geothermal fields (active/recent volcanism and
peripheral zones)
High-temperature / low-permeability reservoirs (hot dry rocks)
New deep, and possibly supercritical, geothermal reservoirs
Multipurpose geothermal reservoirs
Technological challenge of the investigation phase
–
–
–
Improved exploration methods for deep geothermal resources
Combined geological and geophysical imaging methods for
defining and assessing reservoirs for potential heat exchange
3D modelling and imaging of permeable systems
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WP4/WP7: Drilling, stimulation and reservoir assessment
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Dynamics of the geothermal field, stimulation and
reservoir assessment
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Stress pattern
Stimulation and improvement of the permeability of a
geothermal field
Dynamics of the fissured horizons and induced
microseismicity
Reservoir physics and physical properties of rocks and
hydro fracturing group
Fluids, rock-fluid interaction, tracer and geochemistry,
scaling factor
Drilling
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Drilling cost effectiveness and feasibility of hightemperature drilling
Micro-drilling
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WP5/WP8: Exploitation, economic, environmental and social
impacts
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Exploitation
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Unconventional exploitation systems
Development of innovative tools for exploitation
State-of-the-art of down-hole fluid treatments
Plant and reservoir monitoring
Re-injection
A global economic approach of geothermal energy
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Sustainability of geothermal energy
Multiple integrated uses group
Socio-economic benefits of geothermal exploitations
Environmental impacts
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Barriers to development
Microseismicity and risk assessment related to stimulation and
exploitation
Conditions for a 100% clean exploitation of geothermal energy
Increasing policy makers awareness and public acceptance
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Building a network for political support
Societal needs and public requirement
Communication policy
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WP9: Risk evaluation for the development of geothermal
energy
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Decision support systems enable an evaluation of the
technical and socio-economic risk for the development of
the geothermal energy
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