In the oil and gas industry, reliable reporting of reserves and resources is critical for investment, regulatory compliance, and operational planning. A reserves audit provides an independent, thorough review of an operator’s asset base, verifying the accuracy of reported reserves and supporting informed decision-making. By integrating expert analysis with industry standards, a reserves audit enhances transparency, mitigates risk, and builds stakeholder confidence.

What Is a Reserves Audit?

A reserves audit is a systematic evaluation of an oil and gas company’s reserves, carried out by independent technical specialists. The audit verifies the data, calculations, and assumptions underlying reported reserves and resources. Key aspects typically reviewed include:

• Geological and reservoir data integrity
• Historical production and operational performance
• Recovery assumptions and development plans
• Compliance with reporting standards such as SPE-PRMS

Through this process, a reserves audit ensures that the reported figures are credible and reflect the true potential of the assets.

Connection to Competent Persons Reports

One of the primary outputs of a reserves audit is often a Competent Persons Report (CPR). Prepared by a qualified technical expert, a CPR provides independent verification of proven, probable, and possible reserves, as well as contingent and prospective resources. The CPR plays a central role in demonstrating the reliability of reserves data to investors, regulators, and other stakeholders.

Supporting Reserves Based Lending

Reserves audits are particularly important in reserves based lending (RBL). In RBL arrangements, lenders rely on verified reserves to determine borrowing capacity and monitor financial covenants. An accurate reserves audit ensures that credit limits reflect actual asset performance, reducing financial risk and providing confidence to both borrowers and lenders.

The Role of Reserves Evaluators

A reserves evaluator conducts the technical assessment required for a reserves audit, reviewing volumetric calculations, reservoir models, and production data. Their independent evaluation confirms that the asset base is robust, reliable, and suitable for financial reporting, investment decisions, or lending purposes.

Integrating Resource Assessment

Alongside reserves verification, a thorough resource assessment may be performed to evaluate contingent and prospective resources. While these resources may not yet support lending decisions, understanding their potential enhances strategic planning, portfolio optimisation, and long-term investment insights.

Benefits of Conducting a Reserves Audit

For oil and gas operators:

• Ensures compliance with regulatory and industry reporting standards
• Enhances credibility with investors, lenders, and partners
• Identifies operational risks and areas for performance optimisation
• Supports strategic decisions on development, acquisitions, or divestments

For lenders and investors:

• Provides confidence in asset valuation and reported reserves
• Reduces financial and operational risk through independent verification
• Supports sound decision-making in financing, mergers, or acquisitions

A reserves audit is a vital tool in the responsible management of oil and gas assets. By combining rigorous technical evaluation with independent verification, it underpins the preparation of Competent Persons Reports, supports reserves based lending, and leverages insights from reserves evaluators and resource assessments. This comprehensive approach ensures transparency, credibility, and confidence in the reporting, financing, and management of hydrocarbon reserves.