METHOD OF SYNERGETIC REACTANT-IMPULSE-WAVE TREATMENT OF BOTTOM-HOLE FORMATION ZONE AND PLANT FOR ITS IMPLEMENTATION Russian patent published in 2012 - IPC E21B43/22 E21B37/06 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: method of reactant impulse treatment of bottom-hole formation zone includes replacement of killing liquid in casing string with active liquid reactant medium upon simultaneous repressive-impulse action, when active liquid reactant medium reaches roof of productive formation it is pumped into bottom-hole formation zone under repressive-impulse action, then there is repeated implosion action with formed passive medium being removed from bottom-hole formation zone, the passive medium contains products of destruction of asphalt-resin wax deposits and of other colmataging formations, till pumped volume of active liquid reactant medium is removed, then bottom-hole formation zone is treated through annular space under repressive-depressive impulse action of killing liquid with addition of water-repellent SAS, active liquid reactant medium is used as a solvent with addition up to 5 wt % SAS, the pumping is performed under nanowave repressive-impulse action with alternating depressive impulses. Plant for reactant-impulse treatment of bottom-hole formation zone, containing casing string, installed in succession swabing device, packer, impulse depressive generator which radial channels are at the same level with lower perforation holes of well perforation interval, the generator is installed on day surface with possibility of connection to both casing string and annular space, impulse wave depressor with discharge chamber provided with free hydraulic output to reservoir, is provided with pressure multiplier with impulse nanogenerator installed before impulse depressive generator.

EFFECT: recovery and increase of efficiency and initial permeability of well bottom-hole formation zone.

2 cl, 1 ex, 1 dwg