Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling

Article provides a brief overview of the complications arising during construction oil and gas wells in conditions abnormally high low formation pressures. Technological properties solutions used to eliminate emergency situations when drilling intervals catastrophic absorption influx fluid have been investigated. A technology for isolating water excess pressure has developed. The is based on use special device that control hydrodynamic annular space well. An experiment was carried out determine injection time viscoelastic system depending its rheology, rock technological parameters isolation process. mathematical model presented. allows determining penetration depth block water-bearing horizons prevent interformation crossflows breakthrough into production wells.