EVALUATING RESERVOIR PERMEABILITY AND SKIN FACTOR USING PRESSURE BUILDUP TESTING

ABSTRACT With the increasing need for efficient reservoir management, evaluating permeability and skin factor is critical in optimizing oil and gas production. Pressure buildup testing remains a reliable technique for assessing these parameters, providing insights into reservoir performance and wellbore conditions. In this study, pressure buildup tests were conducted on Well A (oil well) and Well B (gas well) in Reservoirs X and Y respectively to estimate permeability and skin factor using Horner’s approximation method. Well A exhibited a permeability of 12.8 md and a high skin factor of 8.6, indicating significant wellbore damage that restricts fluid flow. Conversely, Well B demonstrated an extremely low permeability of 0.028 md but a slightly negative skin factor of 0.292, suggesting improved wellbore conditions due to prior stimulation. The results highlight the impact of wellbore damage on production efficiency, emphasizing the need for remedial measures in oil wells and continuous stimulation in gas reservoirs. The findings reinforce the importance of pressure transient analysis in reservoir characterization and well optimization strategies, ensuring enhanced hydrocarbon recovery.