METHOD FOR OIL-RECOVERY REAGENT PRODUCTION AND OIL PRODUCTION METHOD WITH THE USE OF ABOVE REAGENT Russian patent published in 2006 - IPC E21B43/22 C09K8/588 

FIELD: oil production, particularly means to increase oil recovery from reservoirs and during oil and gas well overhaul.

SUBSTANCE: method involves treating polyacrylamide powder contained in air-tight bag with ionizing radiation, wherein 5-50 l bag is used; serially treating polyacrylamide powder having 0.1-4 mm particle dimensions with accelerated electrons having 0.4-12 MeV energy by half of 1-10 Mrad dose from each opposite bag side having maximal surface area, wherein polyacrylamide powder layer thickness is not more than 30 cm and the bag is located on metal tray; holding polyacrylamide powder in bag for at least 24 hours. The tray may be formed of steel, lead or wolfram. Oil production method involves injecting aqueous oil-recovery suspension in reservoir, wherein the oil-recovery suspension is obtained by polyacrylamide powder treatment with ionizing radiation. Above reagent has the following fraction composition (% by weight): particles having 0.11 mm diameters - 30-70; remainder is particles having 1-4 mm diameters. Reagent concentration in the suspension is 0.1-1.5%.

EFFECT: increased gel particle strength under high pressure gradients reservoir treatment.

2 cl, 3 ex