5 – Appendix

Conversion factors and designations

The Norwegian Offshore Directorate's resource classification and definitions (PDF)

Resource categories:

• Resources is a general term for all oil and gas that can be recovered.
• Resources are classified according to maturity, which measures how far along they are in the planning phase leading to production.
• The primary classifications are reserves, contingent resources and undiscovered resources.
• Contingent resources are resources in projects awaiting a development decision.
• Reserves and contingent resources are total discovered recoverable resources.
• Reserves are recoverable petroleum volumes not yet produced, but which have been approved for production.

Plays and method for calculating undiscovered petroleum resources