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