METHOD OF CHEMICAL REAGENT IMPULSIVE IMPLOSION BOTTOM HOLE TREATMENT, EQUIPMENT FOR ITS EXECUTION, PRESSURE IMPULSE GENERATOR Russian patent published in 2009 - IPC E21B37/06 E21B28/00 

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, can be used for bottom hole zone - BHZ cleaning out of calmative materials, including deposits of asphalts, resins, and paraffins - DARP, also for repair BHZ collector properties during wells development, recovery efficiency increase, including production wells in complicated geophysical conditions. Method of chemical reagent impulsive implosion bottom hole zone - BHZ treatment, which includes pumping into BHZ active reagent fluid media through hole clearance, overflushing, process ageing until deposits of asphalts, resins, and paraffins - DARP dissolved, other calmative deposits and withdrawal of generated passive media, then pump in active media - hydrocarbon dissolver with adding of 0.05-0.1 wt % SAS during depressive-repressive treatment, then overflush the media with killing fluid in volume not less than 1 m³/ m per perforation interval, ageing and further passive media withdrawal, final depressive-repressive-impulse BHZ treatment with pumping into hole clearance killing fluid as a active media with adding 0.1 -2.0 wt % of water-repellent SAS for production well and hydrophilic SAS for injection well. Pressure impulse generator - PID, consists of a case equipped with barrel and a top cap, which has access canal with ability to create a vacuum chamber when connected to TS, inside the canal there is a slide valve locate in a such a way that it can be connect to barrel through its conical surface, which is spring-loaded, installed on remote barrel with a backward moving string, springing it from the opposite side with a block of disk springs and contact of its back side with a piston of the slide valve reverse time delay mechanism, which consists of combined with a returned valve choke with ability to provide liquid flow through cavity formed by filter and shell with radial holes and pass via case radial canals into vacuum chamber, slide valve reverse time delay mechanism connected with the case via barrel. Equipment for chemical reagent impulsive implosion BHZ treatment, includes TS and serially installed swabbing device, parker and PID wich radial canals located on the same level as bottom perforation holes of stratum perforation interval.

EFFECT: increase of oil and gas wells production, well injection capacity increase for injection wells, bottom hole zone recovery and productivity factor and initial permeability increase, noncoherent water withdrawal, water-oil emulsion breaking down.

3 cl, 2 dwg