Oil and Gas

We have supported some of the world’s most technically challenging exploration and development initiatives for over 30 years. Our consultants provide the data to ensure producers invest wisely, stay safe, and maximise operational viability across the asset lifecycle, both onshore and offshore.

With a deep understanding of delivering projects in complex environments, we work with clients to assess the best potential sites, manage environmental impacts, build smart infrastructure, and optimise return on investment—helping them to bring oil and gas to market safely, cost-effectively, and responsibly.

Exploration, Development, and Production

Tetra Tech combines expertise in safety, planning, operations, and science to support our clients. We have assisted and led innovations in operations, processes, and technology for more than three decades.

• Drilling, operational, sub-surface, and wellsite geology support
• Integrated field development planning, asset optimisation, and reservoir management
• Seismic survey design and acquisition support (including 4D and simultaneous operations (SIMOPS))
• Operations management and support, survey optimisation software
• Subsurface technical support and studies
• Reserves and independent reporting
• Deal-focused specialist advisory, and ESG advisory for mergers and acquisitions (M&A)
• Unitisation and equity determination
• Strategic and commercial downstream advisory

Site Characterisation and Assessment

We help clients gain a comprehensive understanding of proposed and operational sites and their environmental conditions.

• Geophysical and geotechnical survey design, scoping, technical specification, and management
• Offshore quality control (QC) of site survey acquisition, processing, interpretation, and reporting
• Regional geohazards assessment and drilling constraints appraisals for shallow and deep-water wells
• Rig foundation assessment, including geophysical and geotechnical data integration
• Environmental surveys and project management
• Unexploded ordnance (UXO) and explosive remnants of war (ERW) studies
• Metocean science and technology

Environmental, Social, and Governance (ESG)

Our team provides specialist support for oil and gas financing and mergers and acquisitions (M&A).

• ESG financing support
• Due diligence
• Competent Person’s Reports (CPR)

Environmental Permitting and Compliance

We help clients satisfy permitting requirements and manage the complexities of ongoing compliance for exploration, production, drilling, well abandonment, and decommissioning. Our team has extensive in-house expertise across most environmental specialisms, from benthic ecology to marine mammals and ornithology. We collaborate with trusted partners to provide services in shipping and navigation, and aviation and radar.

• Planning, permitting, licensing, notifications, and consenting
• Environmental and social impact assessments (offshore and onshore)
• Environmental surveys and permitting

Sustainable Natural Resource Development

Tetra Tech’s commercial specialists bring extensive experience supporting governments worldwide to maximise the value of their natural resources. We provide independent economic and commercial advisory services and have a long track record of working with governments across diverse markets. Our team has developed fiscal models for many of the world’s leading energy-producing nations and delivers independent, data-driven advice to help establish fiscal terms that align with each country’s resource potential and economic context.

Capability Development and Training

We provide technical training services developed for the energy sector, including specialised in-house training tailored to our clients’ needs. We offer a variety of learning formats, including field-based, classroom, virtual, and self-paced e-learning options, all aimed at enhancing workforce skills and fostering organisational excellence. Our portfolio of over 250 courses covers a broad range of technical disciplines including geosciences, engineering, and energy transition, suitable for geoscientists, reservoir and production engineers, and other oil, gas, and energy specialists.

4D Seismic Technology and Operations

Our team delivers high-quality, repeatable data that supports confident reservoir management and field development decisions. We bring practical insight and precision to every stage of a 4D program, from feasibility through to acquisition and processing.

• Planning and execution of time-lapse (4D) seismic projects
• Navigation quality control (QC)
• Survey design and planning, including geophysical
• Technology assessment, geometry setup, coverage and repeatability assessments, and modelling
• Tailored solutions for both oil and gas and renewables projects

Seismic Operational Delivery

We support successful execution of seismic acquisition projects, with a focus on safe, efficient, high-quality operations, flexible resourcing, and technical oversight. With a strong track record both onshore and offshore, our personnel bring practical experience and a commitment to excellence in every role.

• Experienced seismic quality assurance/quality control (QA/QC) personnel
• Client representatives to safeguard technical and contractual performance on behalf of our clients
• Navigation quality control
• Health, safety, and environment (HSE) representatives
• Independent marine assurance including vessel inspections and contractor assessment

Marine Life Mitigation

We provide comprehensive environmental protection support for offshore seismic and marine operations, helping clients meet regulatory obligations and environmental stewardship goals through effective planning, monitoring, and reporting. Our specialists combine scientific expertise with operational understanding to ensure activities are conducted responsibly and with minimal impact on marine ecosystems.

• Onshore project management support
• Protected Species / Marine Mammal Observers (PSO/MMO)
• Passive acoustic monitoring (PAM)
• Camera and visual monitoring technology
• PSO and marine crew training courses
• Facilitating new and unusual technology regulatory engagement and approvals processes