METHOD FOR HIGH-TEMPERATURE OIL DEPOSIT DEVELOPMENT Russian patent published in 2006 - IPC E21B43/22 

FIELD: oil production, particularly to develop non-uniform oil reservoir with flooding thereof.

SUBSTANCE: method involves injecting aqueous polymeric composition plug in well, wherein the aqueous polymeric composition contains polyacrylamide treated with ionizing radiation and water. The aqueous polymeric composition is 0.5-2% aqueous suspension of extremely swollen polyacrylamide. Solid polyacrylamide is treated with 1-10 Mrad dose of ionizing radiation. Before polymeric composition plug injection 5-30% suspension having polyacrylamide suspended in organic water or aqueous sodium silicate solution having 1.1-1.5 g/cm³ and swollen up to 0-20 index is injected in reservoir to be treated. The aqueous suspension additionally contains filler in amount of 0.1-10 % by weight. Suspension is prepared with the use of water having pH-2-5. Aqueous suspension additionally includes water-soluble salt of bivalent or trivalent metal taken in amount of 3-10% by weight.

EFFECT: increased efficiency of high-temperature oil reservoir development due to increased isolation quality along with increased oil recovery.

5 cl, 4 ex