METHOD FOR BOTTOMHOLE FORMATION AREA TREATMENT Russian patent published in 2006 - IPC E21B43/25 

FIELD: oil production industry, particularly to treat bottomhole formation area with the use of bottomhole hydroimpulsive oscillators.

SUBSTANCE: method involves lowering pressure pulse generator in the well; performing impulse bottomhole formation area treatment within intervals characterized by maximal oil saturation, wherein liquid is substituted for water-free oil before bottomhole treatment; forcing hydrocarbon solvent in productive bed interval; performing additional production string and formation perforation in above medium within interval having maximal oil saturation. Bottomhole area treatment is performed in mode in which 20-40 pulses are carried out per one minute and under bottomhole pressure providing liquid influx from formation into well. After impulse treatment implosive well bottom and bore cleaning operation is performed within productive formation zone.

EFFECT: increased efficiency of hydroimpulsive bottomhole zone treatment due additional hydrodynamic action to application to formation to be treated and propagation of pressure pulse energy, which does not cause nugatory factors.

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