Our expertise at your service

GEOTHERMAL ENERGY

A long-term partnerGeothermal energy is a green energy resource that is fully compatible with a sustainable development approach. Storengy is a key player for its partners due to its expertise in helping to manage geothermal project risks and the scope that it offers for long-term ties.

Thanks to cross-business synergies and collaborations within the Group, ENGIE possesses all of the surface and subsurface competencies required to develop and operate high and low-temperature geothermal projects, whether for power production, cogeneration, heating networks or others.

Already present in France and Indonesia, ENGIE may expand its geothermal business to other promising markets.

STORENGY’s expertisea long-standing player in the field of underground operations, at the very heart of the energy markets, storengy boasts extensive industrial experience which it leverages in the development of high and low-temperature geothermal sites. From field studies to subsurface operations, storengy supports its partners in their geothermal projects, whether for district heating networks or power generation.

our Know-how

Study and analysis of subsurface potential

Storengy’s expertise in subsurface sciences is a major asset in the design and implementation of geothermal projects. In the prospecting phase, geologists identify geothermal resource opportunities, mainly using public data. This prospecting by region or country allows Storengy to target the most suitable areas in which to apply for exploration permits.

Storengy takes care of the exploration licences and the applications for permission to carry out exploratory work, the procedures for which vary from country to country.

once the permit has been granted, the exploration phase can begin. During this phase, the features of the subsurface are identified in more detail. Storengy’s geological experts analyse all of the infor-mation collected: surface manifestations (hot springs and fuma-roles), geophysical measurements (faults) and topographical data (satellite images). By interpreting all of this data, Storengy assesses the size of the geothermal field and determines the most favourable locations for the first exploratory drillings. These findings serve to refine the initial estimates and determine whether the field can be developed cost-effectively.

“ Field geology is a key factor. The extent of faults, their direction and position allow us to better understand the underground field. Similarly, taking samples from hot springs and measuring the natural electrical currents circulating in the subsurface help us to assess the temperature and potential expansion of the reservoir as well as its depth. ”Laurent Cariou, Geologist

60 yEars’ ExpEriEncE IN DEvElopING AND opErATING STorAGE FAcIlITIES

ovEr

600 wElls drillEd

50 km oF corEd wElls storEd IN ITS corE lIBrAry, a geological museum and database for mineralogical studies and rock tests.

DrIllING DEpThS From

1000 to 2 500 mEtrEs

Exploration and development plan

In areas which show the greatest potential, the exploration pro-gramme continues by drilling one or more wells. This crucial phase enables the commercial potential of the area to be assessed and the most appropriate development plan to be drawn up. To this end, Storengy’s teams carry out subsurface modelling to determine the number of operation wells and their optimal location.

During the drilling operations, a Storengy expert supervises the various interventions, ensuring that the work runs smoothly and paying particular attention to the safety of staff and people living near the site. The expert also ensures that local expectations are taken into account.

“ With high-temperature geothermal reservoirs, the resource must be developed one step at a time so that the complexity of the reservoirs can be properly understood. Monitoring the production data allows us to refine the initial model and adapt the development plan. ”Patrick Egermann, Reservoir Engineer

Well design and operations

Storengy has teams specialising in the architectural design and construction of wells. The architecture and technical specifications of the wells are adapted on a case-by-case basis responding to the geological context and the project characteristics.

In the operations phase, Storengy oversees the wells’ performance and undertakes operational monitoring by carrying out maintenance operations.

“ Storengy’s drilling and well-equipment experts draw up the designs and technical specifications for the wells in line with industry standards. To carry out the work, Storengy engages reputable and experienced companies. Safety is a key factor in operational management. ”Moïse Raimondeau, Head of Engineering

Services tailored to your needs storengy’s multidisciplinary teams manage geothermal projects from subsurface exploration through to operations. they complement and collaborate with other EngiE businesses on heating network and power generation projects. as an industrial operator, storengy is a key partner in EngiE’s integrated service offering for geothermal projects, managing the subsurface risks inherent to these projects throughout their lifetime.

our solutions

Main project phases

1ASSeSSmeNt of SubSurfAce poteNtiAl ANd field explorAtioN

5 operAtioNS: moNitoriNg ANd mANAgemeNt of performANce, regulAtory coNStrAiNtS ANd well mAiNteNANce 4 drilliNg operAtioNS,

commiSSioNiNg teStS, operAtioNS

3 mANAgemeNt of SubSurfAce riSk, coSt ASSeSSmeNt ANd mANAgemeNt

2 requeStS for explorAtioN ANd drilliNg permitS

“ Permitting is a key stage in communication with the authorities and local communities and an essential educational process to secure stakeholder ownership. Societal acceptance is critical to our projects. ”Sandra Moro, Key account Manager

Our high-value-added service in 6 points

expertiSe iN uNdergrouNd operAtioNS

permittiNg

drilliNg operAtioNS

well operAtioNS ANd mAiNteNANce

geothermAl reSource mANAgemeNt

mANAgemeNt of SubSurfAce riSk ANd uNcertAiNty

storengy.com

N°1 STorAGE opErATor in EuropE

N°3 STorAGE opErATor in thE world

1000+ EmployEEs

21natural gas storagE sitEs IN EuropE

Storengy, a subsidiary of ENGIE, has been developing and operating underground natural gas storage sites for more than 60 years.

Its business is based on recognised expertise in the design and operation of complex industrial sites as well as rare subsurface expertise.

With a capacity of 12.2 billion m³, Storengy is the leading European natural gas storage operator. The company currently operates 21 storage facilities across France, Germany and the United Kingdom and is also represented in Canada and China.

Its long-established presence as a storage facility operator has enabled it to build up relationships of trust with its stakeholders, a vital asset for the further development of geothermal projects both at home and internationally. Backed by its years of experience and the expertise of its people, Storengy is a committed player in geothermal projects. As such, it is a member of the Association Française des Professionnels de la Géothermie (AFPG), the European Geothermal Energy Council (EGEC) and Avenia.

Storengy is a member of:

Storengy – A public limited company with a share capital of €344,941,670.03 – Register of commerce: 487 650 632 Nanterre – Headquarters: 12 rue Raoul-Nordling, CS 70001 – 92274 Bois-Colombes Cedex - France – Design / realisation: – Photographs: Franck Beloncle, Xavier Renauld, Storengy – The present document was produced by an eco-responsible printer on paper of certified origin – November 2015