Today there are lots of mature oilfields. That’s why the task of remaining reserves recovery is of great importance. Low productivity of wells can be associated with a number of factors, including low reservoir permeability and the degradation of filtration characteristics of bottomhole formation zone (BFZ) during development, operation and blinding of slotted screens in horizontal wells. The technique and equipment described in the present paper allow to increase the productivity index of wells and facilitate the reserves recovery. The described technique can be implemented in those areas where hydraulic fracturing or bottomhole acid treatments proved to be ineffective or unsafe.

BFZ treatment is performed using the implosion device. The device affects the formation by means of high pressure pulses creation within the perforation zone. This can increase the recovery factor and intake capacity of wells.

The technique involves improving the BFZ filtration characteristics due to the use of hydraulic impact energy. Such an impact forms a network of fractures in vertical and deviated wells, as well as cleans the slotted screens installed in horizontal wells.

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