WP3 / WP6 Meeting

WP3/WP6 meetingInvestigation of Unconventional

Geothermal Resources and in particular Enhanced Geothermal Systems

Conveners A. Manzella & Th. Kohl

BRGM

BRGM

Engine Launching Conference 12-15 February 2006

Orléans, FranceSession 3

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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

> 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 resourcesWaterDevelopment planning and natural risksContaminated land and waste managementEnvironmental metrologyMapping and geoinformationGeothermal energy and geological storage of

CO2Digital 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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Environmentand

Processes

D. DARMENDRAILD. DARMENDRAIL

Analysis andMineral

Characterisation

A. M. FOUILLACA. M. FOUILLAC

RegionalGeological

Surveys

M. BEURRIERM. BEURRIER

DevelopmentPlanning andNatural Risks

H. MODARESSIH. MODARESSI

Mineral Resources

J. TESTARDJ. TESTARD

Water

D. PENNEQUIND. PENNEQUIN

Geology and

Geoinformation

D. VASLETD. VASLET

Operational DivisionsOperational Divisions

ResearchC. FOUILLAC

Public ServiceL. BEROUD

InternationalJ.C. GUILLANEAU

Production, Informatics and Quality

F. LELANN

Strategic PlanningJ. VARET

General SecretaryR. GUERILLON

General InspectorateP.L KIRCHER

Human ResourcesM. BOUILLEAU

AccountingJ.P. RIBERT

Communications andPublications

G. LEHIDEUX-VERNIMMEN

Information Systems andTechnologies

J.M. TROUILLARDJ.M. TROUILLARD

ChairmanChairmanPh. VESSERONPh. VESSERON

Managing DirectorManaging DirectorD. HoussinD. Houssin

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Geological map of France at 1:50,0001060 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 pre-financing 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

EGS Pilot Plant : Soultz

2005 2006 2007

High enthalpie project : DOM

ENGINE (EGS) & I-GET (Geophysical exploration)

Low geothermal energy projects

Very low geothermal energy projects

Europe, 6FP, Ademe

Ademe, Feder, Régions

Europe, 6FP

Ademe, Arene, EDF, Régions

Europe, Ademe

Fundings

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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 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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BRGM experience in geothermal exploration

> Geophysical exploration (H. Fabriol)• Resistivity survey Ex. Bouillante

• Gravity Magnetic studies

> Geochemical exploration (B. Sanjuan)• 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)• 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

> 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)

> 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

> Meetings to be attended : Potsdam (Workshop 1), Pisa (Workshop 2) and Zürich (Workshop 3)

> Exchange of personnel : ??

> 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

› about 14 km of image logs analysed

Fractures collected from high-resolution oriented image logs

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

S1

<300

Lutetian

Chattian

Rupelian

Priabonian

Bartonian

Basement

46

40

34

28

23

Age(Ma)

ReservoirsStages

Upper Oligocene

Lower Oligocene

Upper Eocene

Ante Tertiary

Middle Eocene

Levels

S3

S2

S4

Sequences

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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

• Dynamics of the geothermal field, stimulation and reservoir assessment

– 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

– Drilling cost effectiveness and feasibility of high-temperature drilling

– Micro-drilling

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WP5/WP8: Exploitation, economic, environmental and social impacts

• Exploitation– 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– Sustainability of geothermal energy– Multiple integrated uses group – Socio-economic benefits of geothermal exploitations

• Environmental impacts– 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– 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

> Decision support systems enable an evaluation of the technical and socio-economic risk for the development of the geothermal energy