The quality and reliability of the results of exploration, engineering and design critically depend on the accuracy of data related to spatial positioning of wells, so data validity and relevance are of high priority and importance. Today the effective management of spatial data is impossible without GIS technologies. ESRI software products are widely used to solve various GIS tasks. Based on ESRI technology specialists of TNK-BP and DataEast have developed WellTracking information system as a comprehensive approach to solve the most urgent production tasks. The system not only allows to create spatial databases containing the up-to-date well data, but also to exchange spatial data obtained from different data sources both within a single Performance Unit and across the Company.