Definition
Primary Production Analysis is the specific workflow and report template on Primary Well & Reservoir Performance Indicators.
Application
- understand the current status and trends of reservoir depletion against expectations
- understand the current status and trends of water flood efficiency against expectations
- quantitatively compare performance of different wells or different groups of wells
- identify and prioritize redevelopment opportunities
Technology
PRIME analysis is built around production data against material balance and require current FDP volumetrics, PVT and SCAL models.
PRIME includes well-by-well diagnostics and gross field diagnostics, but may be extended to sector-by-sector diagnostics.
PRIME includes the following metrics:
Metric name | Diagnostic plots | Objectives | |
---|---|---|---|
1 | Production History | qo, qg , qw, qinj, Yw, GOR, Pe vs time | |
1 | Decline Curve Analysis | qo1, qliq1, qinj1,Yw, GOR, VRR, Pe vs time | Production forecast |
2 | Recovery Diagnostic | qo1, qliq1, qinj1, Yw, GOR, VRR + Pe vs RF | Estimate recovery efficiency |
3 | Pressure Diagnostic | VRR, Pe , Pe_MatBal vs RF | Estimate pressure balance against material balance |
4 | Watercut Diagnostic | Yw vs Yw_MatBal + Yw vs qt | Check for water balance and thief water production |
5 | GOR Diagnostic | GOR vs GORMatBal + GOR vs qt | Check for gas balance and thief gas production |
6 | Injection Efficiency Diagnostics | PIR & PIRMatBal vs Yw | Evaluate WI efficiency |
7 | Well Performance Analysis | IPR Pwf , VLP Pwf vs q | Check for the optimal production/injection target |
8 | Productivity Index Diagnostic | JPI vs dP | Check for PI dynamics |
Sample Case
Fig. 1. Decline Curve Analysis | Fig. 2. Recovery Diagnostic | Fig. 3. Pressure Diagnostic |
Fig. 4. Watercut Diagnostic | Fig. 5. GOR Diagnostic | Fig. 6. Injection Efficiency Diagnostics |
Fig. 7. Well Performance Analysis | Fig. 8. Productivity Index Diagnostic |