Аннотация:The results of theoretical and experimental studies performed at the Institute for Problems in Mechanics of the RAS in the field of geomechanics of oil and gas wells are presented. Mathematical analysis of the stress state and size of fracture zones that arise near the well due to bottomhole pressure decrease is carried out. A new approach to the solution of geomechanical problems, based on tests of rock samples on the unique experimental facility Triaxial Independent Load Test System is proposed.