Element 09×Subsurface
Subsurface in Monitoring
Monitoring, Reporting and Learning
What Subsurface owns here
This element captures how subsurface performance becomes visible — reserves reconciliation, forecast vs actual, model update tracking and benchmarking.
Example documents, by tier
Process, procedure, work instruction 2
- Year-end Proved Reserves ReportingIn 1 of 3 operator registersCompany-wideAlso in EI PSM · 09 Process and operational status monitoring, and handoverNot process safetyNot safety case critical
- Production Forecasting and Efficiency ReportingIn 1 of 3 operator registersAsset · addsAlso in EI PSM · 09 Process and operational status monitoring, and handoverNot process safetyNot safety case critical
Supporting documents 2
- Reserves TemplateIn 1 of 3 operator registersCompany-wideAlso in EI PSM · 09 Process and operational status monitoring, and handoverNot process safetyNot safety case critical
- Definitive Well Log Data Receipt RecordIn 1 of 3 operator registersCompany-wideAlso in EI PSM · 07 Documentation, records and knowledge managementNot process safetyNot safety case critical
Guidance · outside the system 1
Informative, not a “shall”. These belong in the knowledge base, not the management system. How this works →
- Estimation of Proved Reserves GuidelineTypical exampleCompany-wideAlso in EI PSM · 11 Standards and practicesNot process safetyNot safety case critical
Why these belong here
"Subsurface is never finished — it is continually refined."
What does not live here
- →The standards the reporting is measured against — (Policies and Standards)E02 Policies
- →The independent challenge of the data — (Assurance, Review and Improvement)E10 Assurance
- →The risk treatment of a finding — (Risk Assessment and Control)E05 Risk