services

Subsurface

Our integrated subsurface team spans geophysics, geology, petrophysics and reservoir engineering. We deliver insight-driven, operations-ready support across the asset lifecycle — from exploration and M&A to field development and decommissioning. 
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With deep technical expertise and field experience, our subsurface specialists work across onshore, offshore, subsea and deepwater environments, aligned closely with wells and facilities teams.

Our team bring a diverse range of both operator and supply chain experience, fostering innovation and creativity enables us to design technical workflows that are both technically rigorous and aligned to any defined project constraints.
Success Stories
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UK Brownfield infill opportunity study
10
3-phase subsurface study delivered over 10 months, integrating static and dynamic modelling
1
1 high-confidence infill well opportunity progressed following integrated modelling
“Through integrated subsurface analysis and robust dynamic modelling, the team demonstrated that previously marginal targets could deliver meaningful value, providing the UK Independent operator with a clear and defensible infill development opportunity.”
Subsurface Lead
Elemental Energies
Overview
An initial review of the field was conducted to define in-place and recoverable volumes, assess upper reservoir low-permeability zones, and recommend development concepts, well designs, and appropriate technologies.
Challenge
The field contained complex reservoir characteristics with variable permeability and uncertainty in gas-in-place distribution, requiring detailed analysis to identify optimal infill well locations and development strategies.
Solution
A comprehensive technical evaluation was undertaken, integrating geological, petrophysical, and dynamic data to support development planning and well placement decisions.
Asset Evaluation Due Diligence
We bring extensive operatorship experience, offering dedicated teams in subsurface, well engineering, operations, integrity, decommissioning, and QHSE. Our Safety, Environmental, and Net-Zero policies meet all regulatory standards, supported by management systems ensuring compliance, competence, and resource planning across complex projects. We maintain transparent performance records, driving continuous improvement and net-zero goals.
Trusted for technical accuracy and impartiality
Proven support in high-profile M&A and arbitration
Integrated evaluations: subsurface, wells & facilities
Licensing Round Support
We help clients navigate licensing rounds, frontier exploration and block evaluations. Our geoscience team delivers basin screening, seismic interpretation, prospect generation and risk assessments — from global plays to niche acreage.
Basin-to-prospect evaluations with full risk analysis
Basin-to-prospect evaluations with full risk analysis
Basin-to-prospect evaluations with full risk analysis
Appraisal & Development Planning
We deliver complete appraisal and field development planning, combining static and dynamic modelling, well planning, and development optimisation. Our expertise spans greenfield and brownfield projects across asset types and jurisdictions.
Extensive experience across oil & gas, CCS and hydrogen storage
Integrated approach with wells and facilities teams
Optimisation of recovery, cost and schedule
M&A Due Dilligence
We support clients throughout the acquisition and divestment lifecycle — from early screening to data room evaluations and deal close. We assess asset quality, upside, and risk, aligning with financial and strategic objectives.
Early-phase screening and rapid asset assessments
Holistic view: subsurface, development, commercial risks
Aligned support through to transaction close
Subsurface Basis of Design for Decommissioning
We support decommissioning through integrated reservoir and well abandonment studies — including pressure regimes, depletion risk, late-life behaviour, and well barrier assessments — ensuring safe, efficient P&A planning.
Reservoir-led decommissioning and P&A strategy
Subsurface risk mitigation for well abandonment
Supports regulator and operator assurance needs
A SELECTION OF OUR TECHNICAL EXPERTS
Susan Moloney
Principal Production Technologist
,
Elemental Energies
Delivers well performance reviews, technology studies, and production optimisation for major oil and gas and CCUS projects, drawing on 20 years’ global experience.
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Ian Dredge
Principal Geologist
,
Elemental Energies
Leads subsurface teams on exploration, development, and CCS projects. With 16 years’ experience, he excels in reservoir modelling, well planning, and delivering complex field developments.
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Related case studies

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Case study
UK Brownfield infill opportunity study