Pathfinder for Audit of the Nigerian Upstream Oil and Gas Sector

The Nigerian Upstream Oil and Gas Sector is central to Nigeria’s fiscal stability and economic development, forming the foundation of the country’s energy ecosystem. Since the discovery of oil in Oloibiri in 1956, the industry has evolved into a three-tier value chain of upstream, midstream, and downstream. The sector is underpinned by vast hydrocarbon reserves of over 36 billion barrels of crude oil and 200 trillion cubic feet of gas. Given the capital-intensive, technologically complex, and high-risk nature of upstream operations, effective governance, accountability, and resource management are critical.

Pathfinder for Audit of the Nigerian Upstream Oil & Gas Sector is conceived as a comprehensive procedural guide for auditors, regulators, and other stakeholders involved in oversight of the sector. The book seeks to bridge knowledge gaps by providing structured audit methodologies, practical tools, and detailed procedures to support credible, consistent, and effective audit engagements in the upstream petroleum industry.

Organised into eight parts and forty-five chapters, the book systematically addresses the complexities of upstream operations and their audit implications. It begins with an overview of the Nigerian upstream sector, including its regulatory architecture, commercial frameworks, and institutional roles. It then examines the critical success factors for effective audits, emphasising specialised skills, ethical standards, and risk-based methodologies tailored to the sector’s unique challenges.

Subsequent sections provide detailed audit frameworks for governance, systems, and internal controls, as well as step-by-step procedures for auditing costs, capital and operating expenditures, procurement, intercompany transactions, working capital, and cash calls. The book also covers technical audits, value-for-money assessments, forensic reviews, and performance benchmarking, alongside specialised audits of crude oil production, profit oil certification, asset valuation, unitisation, transfer pricing, reserves assessment, and abandonment and decommissioning obligations.

Revenue audits, including verification of complex revenue streams and compliance with applicable laws, are extensively addressed. The final section focuses on the review of work programmes, budget proposals, and performance evaluations of upstream companies, equipping auditors and regulators with tools for effective oversight.

Drawing on extensive professional experience in forensic and value-for-money audits, the book offers practical, adaptable guidance tailored to the Nigerian context but applicable to similar jurisdictions. It is designed as a comprehensive reference for external auditors, regulators, internal auditors, industry professionals, consultants, policymakers, development partners, and transparency institutions such as NEITI.