Keywords
Productivity Index
Inflow Performance Relationship
Reservoir Deliverability
Niger Delta Basin
Abstract
This study presents an integrated well test and reservoir performance evaluation of the Abura-6 well located in the Niger Delta Basin, Nigeria. Multi-rate production tests were conducted across four reservoir intervals (6A86, 5A86, 3A86, and 1A86) to evaluate productivity, fluid properties, and reservoir deliverability characteristics. Productivity index (PI) and inflow performance relationship (IPR) analyses were performed to quantify reservoir efficiency and production potential. The 6A86 interval exhibited superior performance with a maximum oil rate of 2,608 BPD and a calculated productivity index of 1.14 BPD/psi. Lower intervals demonstrated increasing water cut and heavier crude characteristics, particularly within 3A86 and 1A86 sands. Results indicate significant vertical heterogeneity, varying permeability regimes, and differing aquifer influences across the tested intervals. The findings provide a technical framework for choke optimization, completion strategy, and field development planning in the Abura Field and comparable Niger Delta reservoirs.
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