The tracking and management of both resources and reserves estimations are of primary importance for any oil and gas company. When managing reserves data using spreadsheets, organizations face numerous daily challenges in reserves tracking and reporting. This technical paper discusses the implementation and methodology adopted at one of the Middle East’s leading oil and gas companies for a reserves management system free from spreadsheet-based tracking and reporting. The resulting system provides much enhanced security and efficiency in managing reserves, and improves the flexibility of reserves reporting.