METHOD TO INCREASE OUTPUT OF WELLS Russian patent published in 2001 - IPC

FIELD: oil production. SUBSTANCE: method deals with growth of productivity of production wells by way of clearing their face zones. Method provides for treatment of face zone of pool by hydrocarbon solvents. Solution of nephras in stabilized gasoline or gas distillate is pumped into pool in the capacity of solvent, after it aqueous solution of mixture of reagents OXA and MDC is injected into pool. In this case volume of each pumped fringe should secure penetration into pool by value exceeding fouling zone by 1.5-2.0 times. In first fringe concentration of nephras in mixture should not be below 50% and in second fringe ( aqueous solution ) concentration of reagents is: OXA -4.7 and MDC -0.4-1.0 per cent by weight. EFFECT: widened assortment of reagents, increased efficiency of action on face zone. 2 cl