METHOD FOR THERMOCHEMICAL TREATMENT OF BOTTOM-HOLE ZONE Russian patent published in 2015 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: according to a method of thermochemical treatment of bottom-hole zone of a well, in a mode of repeating cycles: supply of sodium in sealed aluminium shells to the bottom-hole, initiation of a reaction of these metals, exposure, for supply of sodium in sealed aluminium shells there used is a downward water flow created in tubing strings with a pump located on the surface, and a deep-well jet pump with a flow section exceeding the diameter of the sealed shells, which completes the cycle after process exposure by pumping-out of slurries from under packer space in a mode of depressive action on a productive formation, sealing of sodium in shells is performed by means of a diaphragm diluted in an alkali solution, the batch supply of which is implemented after supply of sodium in the sealed aluminium shells for destruction of the diaphragm and initiation of the reaction. Treatment is performed in the mode of repeating cycles till maximum value of profile of inflow from the well is achieved.

EFFECT: expedition of recovery of filtration properties of bottom-hole zones of oil-gas wells, which were disturbed during operation.

2 cl, 1 dwg, 2 ex