we make the earth the best place
to store all energies

Our expertise
in underground storage


Prospective studies and strategic reviews, pre-projects, pre-feasibility studies, decision-making support, site audits, etc.

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Feasibility studies, basic design, project management, sub-surface and surface technologies, etc.

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Planning permission, tendering, construction management, commissioning and start-up, etc.

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Management, maintenance and operation of underground storage facilities.

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Green Storage,
our environmental ambitions

A large-scale programme on sustainable development, carbon-footprint reduction, decarbonised energy storage, and innovative solutions addressing climate challenges.

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of experience


experts and technicians


countries with activity


fully operated storage sites

Key figures

An international engineering company specialised in underground storage solutions for energies, Geostock has gradually established global leadership in underground energy storage.

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Close to 60 years of underground storage expertise

Geostock has acquired top-level experience in all underground storage techniques, with unique expertise in the implementation of safe, economical and environmentally respectful infrastructure.

Types of underground storage

Hydrocarbon underground storage

Carbon-free energy underground storage

CO2 underground storage