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Services

Technical services and consulting solutions for clients in the property, energy, transport, water, resources, defence and government sectors.

Advisory and management consulting

Advisory and management consulting services for businesses and projects, including economics, due diligence, transaction advisory, ESG and more.

Communications, creative and digital

Communications, creative and digital solutions for governments and businesses including community engagement, design, research, data and software development.

Laboratories

Scientific analysis services for AgroScience, food safety, workplace exposure, environmental metrics and contaminants of concern in Europe and the UK.

Planning and approvals

Development strategy, planning and approval solutions for buildings, infrastructure, transport and city projects and investments.

Project and program management

Project management solutions for the most complex building, infrastructure, organisational change, and systems projects.

Training

Specialist training services, programs and accreditation for health, safety and risk, project management, and energy sector capability development.

Sectors

World-leading technical and consulting solutions for clients in the property, energy, transport, resources, water, defence and government sectors.

Property

Design, technical and advisory services for the property sector, including residential, commercial, retail, industrial, health, education and data centre projects.

Energy

Energy exploration, development and optimisation solutions for renewables, power and gas networks, energy storage, oil and gas and nuclear facilties.

Transport

Smart, safe and sustainable transport infrastructure development services and advice for rail, aviation, port and road clients and projects.

Defence and government services

Expertise for defence capability and infrastructure investments, security and safety projects, and information and telecommunications initatives.

Water

Discover our industry-leading strategy, design and management solutions for wastewater, groundwater, flooding, drainage and network infrastructure.

Resources

Commercial data, design advice and technical management solutions for safe and environmentally responsible resource exploration and operations.

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Services

Technical services and consulting solutions for clients in the property, energy, transport, water, resources, defence and government sectors.

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Advisory and management consulting

Advisory and management consulting services for businesses and projects, including economics, due diligence, transaction advisory, ESG and more.

Due diligence

Economics

Strategy and transformation

Commercial and technical advisory

Transaction advisory

Project investment and finance

ESG consulting

Deal advisory

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Communications, creative and digital

Communications, creative and digital solutions for governments and businesses including community engagement, design, research, data and software development.

Communications and engagement

Creative, visualisation and immersive design

Social advisory and research

Data management, analytics and insights

Spatial intelligence and GIS

Software development

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Design and development

Technical and consulting services for buildings, infrastructure and cities including architecture, engineering, surveying, landscape architecture and urban design.

Architecture

Lifts and escalators

Building services engineering

Civil engineering

Fire engineering

Geotechnical engineering

Landscape architecture

Structural engineering

Surveying

Utility options and design

Urban design

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Laboratories

Scientific analysis services for AgroScience, food safety, workplace exposure, environmental metrics and contaminants of concern in Europe and the UK.

AgroScience analysis

Food safety analysis

PFAS Analysis

Environmental analysis

Analysis of unknowns

Workplace exposure analysis

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Planning and approvals

Development strategy, planning and approval solutions for buildings, infrastructure, transport and city projects and investments.

Planning consultancy

Transport planning

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Project and program management

Project management solutions for the most complex building, infrastructure, organisational change, and systems projects.

Program management

Project management

Cost management / quantity surveying

Building consultancy

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Training

Specialist training services, programs and accreditation for health, safety and risk, project management, and energy sector capability development.

Health, safety and risk

Training: project management

Capability development and training for the energy sector

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Sectors

World-leading technical and consulting solutions for clients in the property, energy, transport, resources, water, defence and government sectors.

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Property

Design, technical and advisory services for the property sector, including residential, commercial, retail, industrial, health, education and data centre projects.

Residential

Commercial and retail

Leisure and tourism

Industrial

Health and healthcare

Education

Data centres

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Energy

Energy exploration, development and optimisation solutions for renewables, power and gas networks, energy storage, oil and gas and nuclear facilties.

Oil and gas

Renewables

Nuclear facilities

Power and gas networks

Storage

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Transport

Smart, safe and sustainable transport infrastructure development services and advice for rail, aviation, port and road clients and projects.

Rail

Aviation

Ports

Roads

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Defence and government services

Expertise for defence capability and infrastructure investments, security and safety projects, and information and telecommunications initatives.

Defence

Security and safety

Information and telecommunications

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Water

Discover our industry-leading strategy, design and management solutions for wastewater, groundwater, flooding, drainage and network infrastructure.

Water management

Wastewater

Flooding and drainage

Groundwater

UK and Ireland regulated water asset management

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Resources

Commercial data, design advice and technical management solutions for safe and environmentally responsible resource exploration and operations.

Mining

Waste

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Projects

We define, design and manage projects that create shared value to a complex, urbanising and resource-scarce world.

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Brilliant minds finding solutions to complex problems, made easy to understand. Making complex easy.

Brilliant minds finding solutions to complex problems, made easy to understand. Making complex easy.

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Underground Gas Storage Facilities

Underground gas storage

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Underground gas storage plays a critical role in the diversification of energy sources, potentially reducing CO2 emissions and reaching sustainability goals while assuring a reliable and flexible power source.

Natural gas power plant

Natural gas storage

Natural gas storage is used as a strategic reserve to level out peaks in demand. Based on seasonal variations, gas is injected when demand and price are low, then withdrawn again as needed Gas storage also provides short-term protection against unforeseen supply disruption by providing an immediate and reliable energy source. Unlike spot markets, storage offers the advantage of a physical asset located close to demand. Natural gas storage allows large natural gas consumers to hedge supply and price risk and, should price suddenly spike, capture the upside opportunity.

How does it work?

A natural gas storage system needs a working gas volume, injection capacity, withdrawal capacity and a volume of cushion gas. The working gas volume is the volume that can be injected and withdrawn during normal operations. The cushion gas volume is the gas that is required to remain in store to maintain reservoir pressure. 

The injection and withdrawal capacity, which are largely dependent on the storage pressure, control the rate at which gas can be injected or withdrawn. If storage pressure is low, gas can be injected at high rates but withdrawn at low rates. Conversely, if storage pressure is high due to considerable working gas in store, injection rates will be low, but withdrawal rates will be high. There is a well-documented hysteresis in the field's ability to be repeatedly repressurised and depleted which has to be modelled.

Where does it get stored?

The most common types of natural gas storage are in depleted gas reservoirs and salt caverns and, to a lesser extent, in aquifers. Where aquifers and depleted aquifers do have a much more useful storage capacity is in the area of CO2 long-term capture and storage.

Underground gas (natural gas, CO2, hydrogen) storage solutions: depleted oil and gas fields; salt caverns; saline aquifers

Depleted fields

Depleted gas reservoirs have advantages over other types of gas storage as any unproduced gas can be used as cushion gas, and the fields may also have very large working gas capacity. Depleted reservoirs are also likely to be linked to existing gas infrastructure, which reduces initial investment costs. 

Salt caverns

Salt caverns are located in thick halite formations. They are made by pumping fresh water down a borehole into the salt layer to dissolve the salt and circulate the saline solution to the surface. This process continues until the required size of cavern is reached. Hydrocarbon liquid or gas storage in salt caverns is well understood. For example, the US Strategic Petroleum Reserve (SPR), which is the world's largest supply of emergency crude oil, is stored in salt caverns at four sites along the Gulf of Mexico coastline. 

Depleted aquifers

Converting an aquifer to a natural gas reservoir requires long, slow injection cycles to displace the water.

Cushion gas in depleted fields can be 50% of the total storage volume, whereas in salt caverns, it may only be 25% of the total storage volume. 

Aquifer storage of natural gas requires a very large percentage of cushion gas making this the least efficient option for storage and withdrawal of natural gas.  However, since the intent for CO2 storage is that it stay stored, this is not an issue in that case.

Exploration and appraisal studies

  • Detailed 3D static and dynamic modeling for storage design and optimization
  • Reservoir porosity and permeability
  • Reservoir volumes
  • Communication between adjacent reservoirs
  • Input and output flow rates
  • Screening of depleted oil/gas fields for identifying storage potential
  • Cushion gas requirement

Asset and reservoir management

  • Screening of depleted oil/gas fields for identifying storage potential
  • Geomechanical modelling
  • Structural integrity of reservoir
natural gas blue flame abstract
gas pipeline with yellow pipes and red valve for underground gas storage
gas pipeline in yellow