METHOD OF DEVELOPMENT OF MULTILAYER OIL DEPOSITS Russian patent published in 2016 - IPC E21B43/14 E21B43/20 E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in the development of multilayer deposits of oil wells with horizontal sidetracks - BGS. Method is used to drill vertical production and injection wells. Carry out injection of working agent in injection wells and selection of products from the production wells. After the joint development of oil saturated interlayers main vertical shaft to the watering hole at least 95% of the vertical shaft mining wells in each seam BGS drilled at an angle of at least 20° in the horizontal plane with a notional line drawn between the production and the nearest injection wells. Injection well, which cause water cut wells BGS in the seam with the highest rate of watering, fixed during operation of the main vertical shaft mining wells pumped water. Water is pumped with a salinity less than 5 g/l for rock containing fine clay particles capable of migrating under the influence of low-mineralized water or injection water with a salinity of at least 300 g/l for rock containing no clay particles. In the seam with the lowest rate of irrigation water is pumped to an alkaline pH of at least 9 d.ed. Pumping of working agents is stopped when the difference in water-cut stems relative to each other by 20% or less. Then move on to the waste injection or formation water. For the injection of working agent used equipment for dual injection.

EFFECT: improving the uniformity of production of oil, reduction in water inflow to the production wells and increasing sweep efficiency and oil recovery.

1 cl, 2 ex, 1 dwg