Competent person reports (CPRs) and annual reserves reporting

Our reserves and reporting team brings together geoscientists, reservoir engineers and commercial specialists who focus on coherent, technically robust reporting for conventional oil and gas and carbon storage resources. Services include:

• Audit of client and operator interpretations and models.
• Independent subsurface interpretation using primary data.
• Classification of reserves and resources (1P, 2P, 3P; contingent and prospective).
• Assessment of geological, development and commercial risk.
• Volume estimation aligned with project maturity, development plans and market conditions.

This technical clarity helps stakeholders understand the full subsurface profile of an asset and its development potential.

 

Reserves and resource reporting must align technical outcomes with commercial reality. We provide:

• Economic Limit Test (ELT) assessments.
• Full economic valuations, including NPV and EMV.
• Cost sheets and scenario inputs for client-led modelling.
• Carbon pricing and taxation integration where relevant.

Our evaluations support financing discussions, strategic planning and investment decision-making across portfolios that include UK and international assets.

Our team works with international reporting frameworks and listing requirements, helping clients demonstrate compliance and consistency. This includes:

• PRMS, SRMS, COGEH.
• SEC and NI 51-101.
• Listing rules for LSE, NYSE, TSX, FWB, SEHK and SGX.

This approach enables our clients to submit reserves and resources reports that meet the expectations of exchanges, financial institutions and regulators worldwide.

We can prepare CPRs and reserves reporting for fields at any stage of maturity. Capabilities include:

• Geophysical, geological and petrophysical characterisation of fields, fluids, reservoirs and seals.
• Decline curve analysis.
• Full field dynamic model assessment.
• Economic modelling of reserves.

These assessments support screening, equity investment and debt provision for oil and gas projects.

For carbon capture, utilisation and storage (CCUS) projects, we provide CPRs and reserves-style reporting for carbon storage resources. Our capabilities include:

• Evaluation of depleted hydrocarbon fields, saline aquifers and similar formations.
• Storage volume and efficiency estimation.
• Containment assessment and development concept evaluation.
• Geological characterisation of storage formations and seals.

These assessments support screening, investment and permitting decisions for CCUS projects in the UK and beyond.

 

Where required, we incorporate environmental, social and governance factors into CPRs and reserves documentation. Services include:

• ESG-aligned reporting and disclosures.
• Integrated greenhouse gas (GHG) assessments.
• Support for corporate climate and sustainability targets.

This helps clients respond to the expectations of regulators, investors and the broader community regarding climate and sustainability performance.

Our reports are structured to enable technical specialists and non-technical stakeholders to follow the line of reasoning with ease. We provide:

• Step-by-step narratives of technical reasoning.
• Explicit rationale for classifications, ranges and assumptions.
• Transparent documentation that supports due diligence and audit processes.

This approach enables investors, lenders and regulatory bodies to trace how conclusions were reached and reinforces internal oversight.

CPRs and annual reserves reports remain an essential element of responsible asset management and investment planning. Independent, rigorously prepared assessments help organisations satisfy regulatory requirements, secure funding and shape strategies for development, divestment and decarbonisation. They give stakeholders a consistent view of how subsurface assets and carbon storage resources are evaluated and governed over time.

GHD provides independent, internationally compliant evaluations that help clients align subsurface assessment with strategic, regulatory and financial priorities. Whether assessing oil and gas reserves or carbon storage potential, our integrated teams apply rigorous technical, commercial and ESG criteria to develop reports that withstand detailed review. The result is a set of evaluations that support long-term value and open, evidence-based communication with regulators, financiers and decision-makers.