METHOD FOR TREATING OIL DEPOSIT NEAR WELL BOTTOM ZONE Russian patent published in 1997 - IPC

FIELD: oil production. SUBSTANCE: water treated with a physical field is pumped in the seam. The water is held in the seam and then working agent treated with the same physical field is pumped in the seam. The water and working agent are treated additionally before pumping in. The treating by two physical fields is carried out concurrently or subsequently. The treating by the two physical fields is carried out by combining electrical, magnetic fields and pressure field. Pressure field is developed by pressure pulses of not less than 4 MPa value. Electric field is not less than 0.2 - 2.0 V/m intensity. EFFECT: higher oil production. 6 cl, 3 dwg, 1 tbl