Pressure Transient Analysis and Productivity Evaluation of Abura-6 Well, Niger-Delta, Nigeria.

Pressure transient analysis (PTA) is a fundamental tool in reservoir engineering for evaluating subsurface properties and well performance. This study presents a detailed analysis of well test data from the Abura-6 well, integrating flow rate and pressure measurements obtained under multi-rate testing conditions. Productivity index, pressure behavior, and fluid characteristics were evaluated to estimate reservoir performance. Results indicate that upper reservoir intervals exhibit high productivity and favorable permeability, while deeper zones show reduced performance due to heavier oil and possible formation damage. The findings provide critical insights for reservoir management and production optimization.