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Design Mechanism for Waterfloodong in a Reservoir (A case study of a Niger Delta reservoir)

Volume: 56  ,  Issue: 1 , July    Published Date: 14 August 2020
Publisher Name: IJRP
Views: 212  ,  Download: 86
DOI: 10.47119/IJRP100561720201314

Authors

# Author Name
1 KalaDokubo Ibiso
2 Ehirim O. Emmanuel
3 Godwin C. Nmegbu

Abstract

A dynamic reservoir simulation was performed using Eclipse (PETREL) to investigate the application of sound waterflood design principles to a Niger delta oil field. To ascertain contributions of the different schemes and techniques applied in selecting the best appropriate waterflood design, a case of recovery by natural depletion was first considered. This recovery approach, after all possible optimizations, the final EUR obtained was 28.76% with two new added wells, B1 and C2. Adding a third well could only raise it to 29.4%. Recovery is improved by shutting off completions in the water zone, watered out producers and deviation of old wells. This shows that a lot can still be squeezed out of the field, recommending it for secondary and enhanced oil recovery, implying the need for additional recovery by secondary and enhanced oil recovery technologies. The numerical reservoir model was subsequently examined under different cases to optimize a secondary recovery water scheme. Optimized parameters included critical gas saturation, well placement, plateau production and injection rates, and well completion. Sensitivity analysis was also performed with respect to these optimization constraints. This gave a recovery factor of 52.23%, with the plateau rate of 7400 Sm3/d sustained for 4 years as required.