VALIDATION OF GEOLOGICAL STOIIP ESTIMATES USING MBAL; A CASE STUDY IN RESERVOIR MANAGEMENT

Accurate estimation of Stock Tank Oil Initially in Place (STOIIP) is essential for effective reservoir management and production planning. This study validates geological STOIIP estimates through the Material Balance (MBAL) method, comparing it with the volumetric approach to evaluate their reliability. The research focuses on Reservoir Q, which spans 1,000 acres, has a thickness of 75 feet, and an estimated oil volume of 105 million stock tank barrels (MMSTB). A comparative analysis of both methods showed no significant differences, with STOIIP estimates of 102 MMSTB and 105 MMSTB, respectively, being nearly identical. This consistency enhances confidence in the accuracy of geological reserve assessments and supports improved reservoir performance optimization and hydrocarbon recovery strategies. The study underscores the importance of MBAL as a validation tool to reduce uncertainties and enhance resource estimation. These findings contribute to the advancement of petroleum engineering methodologies by demonstrating the effectiveness of MBAL in verifying geological STOIIP estimates. The research also highlights the necessity for ongoing reservoir monitoring and data integration to enhance decision-making in field development and maximize hydrocarbon recovery.