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.
Metrics
PRIME includes the following metrics:
Metric name | Diagnostic plots | Objectives | ||||||
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1 | Production History Map | qo, qg , qw, qinj, VRR, Pe over STOIIP & Structure | Production Distribution Overview |
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2 | Recovery Map | Qo, Qg , Qw, Qinj , VRR, Pe over RF & Structure | Recovery Distribution Overview |
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3 | Production History Graphs | qo, qg , qw, qinj, Yw, GOR, Pe , Np, Ninj vs time | Production History Overview | |||||
4 | Decline Curve Analysis | qo1, qliq1, qinj1,Yw, GOR, VRR, Pe vs time | Production Forecast | |||||
5 | Recovery Diagnostic | qo1, qliq1, qinj1, Yw, GOR, VRR, Pe, Pem vs RF | Estimate recovery efficiency and pressure decline | |||||
6 | Watercut Diagnostic | Yw, Ywm vs qt | Check for water balance and thief water production |
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7 | GOR Diagnostic | GOR, GORm vs qt | Check for gas balance and thief gas production | |||||
8 | Injection Efficiency Diagnostics | PIR , PIRm vs Yw | Evaluate WI efficiency |
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9 | Well Performance Analysis | Pwf_IPR , Pwf_VLP vs qo | Check for the optimal production/injection target |
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10 | Productivity Index Diagnostic | JPI, JPIm vs dP | Check for PI dynamics |
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Diagnostic
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 |