METHOD OF REDUCING SAND INGRESSES IN GAS WELLS WITH ABNORMALLY LOW FORMATION PRESSURE Russian patent published in 2010 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: in method for reducing sand ingresses in gas wells with abnormally low formation pressure, which involves pumping to the formation through production well of the solution of urethane pre-polymer in acetone-containing solvent with displacement of solution to the formation, the above solution contains, as acetone-containing solvent, acetone or its being mixed with gas condensate at the content of the latter of up to 50% of the mixture weight; 5-30% solution is used; displacement is performed by gas pumping, which contains water vapours, with relative humidity of not less than 10% during not less than 1 hour at the above gas pumping pressure exceeding formation pressure by 1.5-5 times. At that, after the above processing there also performed is well perforation.

EFFECT: increasing efficiency of reduction of sand ingresses in the well, reducing the period of well development, simplifying the technology and increasing well flow rate.

2 cl, 4 ex, 1 tbl