Geothermal reservoir management a thirty year practice in the paris basin
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GEOTHERMAL RESERVOIR MANAGEMENT. A THIRTY YEAR PRACTICE IN THE PARIS BASIN. Pierre UNGEMACH and Miklos ANTICS GEOPRODUCTION CONSULTANTS (GPC) Paris Nord 2, 14 rue de la Perdrix, Lot 109, B.P. 50030 95946 ROISSY CDG CEDEX, France

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Geothermal reservoir management a thirty year practice in the paris basin

GEOTHERMAL RESERVOIR MANAGEMENT. A THIRTY YEAR PRACTICE IN THE PARIS BASIN

Pierre UNGEMACH and Miklos ANTICS

GEOPRODUCTION CONSULTANTS (GPC)

Paris Nord 2, 14 rue de la Perdrix, Lot 109, B.P. 50030

95946 ROISSY CDG CEDEX, France

e-mail : [email protected] , [email protected]


Scope
SCOPE

  • INTRODUCTION

  • HISTORICAL OVERVIEW

  • RESOURCE AND RESERVOIR SETTING

  • DEVELOPMENT STATUS AND MILESTONES

  • TECHNOLOGY OUTLOOK

  • OPERATION AND MAITENANCE

  • RISK ASSESSMENT

  • RESERVOIR MANAGEMENT / ENGINEERING / SIMULATION

  • SUSTAINABILITY

  • CONCLUSIONS





Development status and milestones location of geothermal distric heating doublets
DEVELOPMENT STATUS AND MILESTONESLOCATION OF GEOTHERMAL DISTRIC HEATING DOUBLETS


Development status and milestones targeted achieved forecasted objectives
DEVELOPMENT STATUS AND MILESTONESTARGETED, ACHIEVED, FORECASTED OBJECTIVES

Target Achieved Forecast

(1985) 1990 2000 2006

Operating doublets 55 43 34 34

Total installed capacity (MWt) 360 260 227 200

Produced heat (GWht/yr) 2,000 1,455 1,240 1,000

Unit capacity (MWt) 6.5 6.0 6.7 5.9

Unit yield (MWht/yr) 36,000 33,800 36,200 30,000

Artificial lift wells 49 36 27 22

Self-flowing wells 6 7 7 12


Technology outlook 1 the geothermal well doublet of heat mining
TECHNOLOGY OUTLOOK (1)THE GEOTHERMAL WELL DOUBLET OF HEAT MINING


Technology outlook 2 equipment performance and lifetime record
TECHNOLOGY OUTLOOK (2)EQUIPMENT PERFORMANCE AND LIFETIME RECORD


THERMOCHEMICAL SHORTCOMINGSCORROSION AND SCALINGDRIVING MECHANISMS OF CASING DAMAGEAQUEOS CO2/H2S ENVIRONMENT


Well drilling completion anti corrosion production well design
WELL DRILLING/COMPLETIONANTI-CORROSION PRODUCTION WELL DESIGN


THERMOCHEMICAL SHORTCOMINGSCORROSION AND SCALINGDOWNHOLE CHEMICAL INJECTION LINESSETUPS IN ARTIFICIAL LIFT WELLS


Operation and maintenance 1 monitoring surveillance of production facilities
OPERATION AND MAINTENANCE (1)MONITORING/SURVEILLANCE OF PRODUCTION FACILITIES

  • geothermal fluid

  • loop parameters

  • well deliverabilities

  • pump and frequency converter characteristics

  • inhibitor efficiencies

  • inhibition equipment integrity

  • well head integrity

  • surface piping control

  • casing inspection


Operation and maintenance 2 well workover corrosion and scaling abatement
OPERATION AND MAINTENANCE (2)WELL WORKOVERCORROSION AND SCALING ABATEMENT

  • WELL WORKOVER

    • casing clean up

    • lining of damaged tubulars

    • fishing

    • reservoir stimulation

  • CORROSION AND SCALING ABATEMENT

    • downhole chemical inhibition lines

    • corrosion, scaling, microbiological inhibitors


Operation and maintenance 3 dogger database
OPERATION AND MAINTENANCE (3)DOGGER DATABASE

  • Hosted on ORACLE platform

  • Data instructed locally via ACCESS interface


Risk assessment
RISK ASSESSMENT

  • Exploration (mining, geological)

  • Exploitation (technical, managerial)

  • Economic/financial (market, institutional, managerial)

  • Social acceptance (image)



Reservoir engineering assessment of reservoir structure
RESERVOIR ENGINEERING ASSESSMENT OF RESERVOIR STRUCTURE


Reservoir engineering reservoir layer stacking
RESERVOIR ENGINEERING. RESERVOIR LAYER STACKING


Reservoir engineering temperature decline at production well vs reservoir equivalents
RESERVOIR ENGINEERING. TEMPERATURE DECLINE AT PRODUCTION WELL VS. RESERVOIR EQUIVALENTS


Reservoir engineering reservoir simulation
RESERVOIR ENGINEERINGRESERVOIR SIMULATION

  • CORE

    • Calibrated regional model, online with the Dogger database, operated as a reservoir management tool

  • MODELLING STRATEGIES

    • Regional. Overall reservoir

    • Subregional. Multidoublet areas

    • Local. Single doublet systems

  • OBJECTIVES

    • Reservoir life

    • Hydrodynamic interferences

    • Solute transport

    • Sustainability assessments


RESERVOIR SIMULATIONSUB REGIONAL DOMAIN TRANSMISSIVITY AND INITIAL PRESSURE/TEMPERATURE DISTRIBUTION


Reservoir simulation sub regional domain temperature patterns year 2005
RESERVOIR SIMULATIONSUB REGIONAL DOMAIN TEMPERATURE PATTERNS (YEAR 2005)


Reservoir simulation sub regional domain temperature patterns year 2030
RESERVOIR SIMULATIONSUB REGIONAL DOMAIN TEMPERATURE PATTERNS (YEAR 2030)


Sustainable reservoir development simulated scenarios
SUSTAINABLE RESERVOIR DEVELOPMENTSIMULATED SCENARIOS

  • WORKING ASSUMPTIONS. DESIGN FEATURES

    • Single/multiple well doublet/triplet heat mining arrays

    • Homogeneus/heterogeneus reservoir settings

    • Well life = 20 – 25 yrs

    • Reservoir life = 20 – 30 yrs (doublet/triplet thermal breakthrough time)

    • Well spacing = 1000 – 1500 m

    • Heat mining schemes/schedules

      • Existing doublet: 0-25 years

      • Mixed well triplet array: 25-50 years

      • New well doublet: 50-75 years

  • DESIGN OBJECTIVE

    • Avoid undue premature cooling of producing wells

    • Achieve a minimum 75 years reservoir life


SUSTAINABLE RESERVOIR DEVELOPMENTSIMULATED SCENARIOS THE MULTIDOUBLET/HETEROGENEOUS RESERVOIR CASE. SIMULATED AREA


SUSTAINABLE RESERVOIR DEVELOPMENTSIMULATED SCENARIOSTHE MULTIDOUBLET/HETEROGENEOUS RESERVOIR CASE. SIMULATED OUTPUTS (YEAR 27)


SUSTAINABLE RESERVOIR DEVELOPMENTSIMULATED SCENARIOSTHE MULTIDOUBLET/HETEROGENEOUS RESERVOIR CASE. SIMULATED OUTPUTS (YEAR 52)


SUSTAINABLE RESERVOIR DEVELOPMENTSIMULATED SCENARIOSTHE MULTIDOUBLET/HETEROGENEOUS RESERVOIR CASE. SIMULATED OUTPUTS (YEAR 77)





Conclusions
CONCLUSIONS

  • GDH scored well

  • State/public sector involvement proved a decisive impetus

  • Operators exhibit mature technological and entrepreneurial skills

  • Exploration/exploitation risks mastered to date

  • Sound resource/reservoir management outline

  • Sustainable heat mining, up to 50-75 years ahead, secured

  • Improve image

  • Environmental, clean air, benefits to boost fiscally incentive measures.


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