OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2010 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling of vertical production and injection wells as per the specified scheme to productive formation. It also involves water pumping and oil production, drilling at the late stage of deposit development at least of two side horizontal shafts of injection wells located in parallel planes between vertical production wells. Hydric dioxide 30% with stabilising agent - amylose or common soap - is supplied to one of injection wells. Counter pressure is created on heads of injection wells with side horizontal shafts. There performed is process exposure with oil displacement owing to extraction of reaction products, and after it is completed, there performed is additional oil displacement via production wells by means of water supplied from surface via injection wells with side horizontal shafts. Before hydric dioxide is supplied to productive formation, there supplied is suspension of native platinum ground to the size of less than 10 microns, in kerosene or diesel oil with concentration of native platinum of 0.5% of kerosene volume or diesel oil in volume of 0.01 of threshold volume. When hydric dioxide is supplied in volume of 0.15 of threshold volume, to the other injection well there supplied is 5% water solution of hydroquinone in volume of 0.1 of threshold volume. Hydric dioxide and solution of hydroquinone are forced by means of water to productive formation, and after exposure there again performed is water pumping via injection wells with oil displacement via production wells.

EFFECT: increasing effectiveness of development of residual oil owing to deeper penetration of reagents, increasing impact depth on oil formation, reducing costs for development of residual oil.

4 cl, 2 dwg