METHOD OF GAS-THERMOHYDRODYNAMIC STIMULATION OF BOTTOMHOLE FORMATION ZONE Russian patent published in 2003 - IPC

FIELD: oil production; applicable in increase of oil production rate by physico- chemical stimulation of bottomhole formation zone on basis of rational utilization of energy of combustible materials in their burning in well. SUBSTANCE: method includes lowering of combustion material charge into well to interval of its perforation, and its combustion. Prior to lowering of combustible charge, injected into bottomhole formation zone is cold solution of surfactant, and then, cold fluid with high viscosity. Wellbore within interval of perforation is filled with low-viscosity fluid possessing high boiling temperature and high heat capacity. Well part above perforation interval is filled with heavy fluid. After combustion of combustible charge, effected at moment of minimal pressure in formed gas cavity is implosive stimulation with help of implosive chamber. It is installed in lower part of perforation interval with inlet valve above lower holes of perforation. EFFECT: higher efficiency of bottomhole formation zone stimulation due to fuller utilization of energy liberated in combustion of combustible material. 1 ex