FIELD: oil production. SUBSTANCE: water treated with permanent magnetic field is pumped in the oil seam. The water is held in the seam and then working agent treated with permanent magnetic field is pumped in the seam. The water and working agent are treated with pulse-cyclic magnetic field of variable intensity by supplying DC to the electric magnets installed on the water and agent supply pipeline with a gap. Direct current of different voltage is supplied to he adjacent electric magnets to develop permanent magnetic field of variable intensity. EFFECT: improved filtration ability of the well bottom zone. 3 cl, 2 dwg
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