METHOD FOR DEVELOPMENT OF OIL POOL SECTION Russian patent published in 2014 - IPC E21B43/20 E21B43/30 

FIELD: oil and gas industry.

SUBSTANCE: method lies in drilling of a deposit by vertical and/or directional injection wells and producing wells with crossed and mutually perpendicular boreholes, injection of a working fluid through the vertical and/or directional injection wells and oil extraction through the producing horizontal wells. In two oil-saturated interlayers with matching structural geometry, horizontal boreholes of the producers are made with a length 4 times bigger than the distance between the producers and injectors so that the horizontal boreholes form the grid at cross-sections. 1 or 2 vertical and/or inclined injectors are placed to the centre of each cell. At that a row of parallel horizontal boreholes of the producers is made in one of the oil-saturated interlayers while the other row of parallel horizontal boreholes of the producers is made perpendicular to the first row in the other oil-saturated interlayer in order to create perpendicular filtration flows of one interlayer in regard to the other. The minimum distance between the horizontal boreholes at their cross points in structural geometry is 0.5 m and water-swell packers are envisaged to cut off points of the working fluid breakdown.

EFFECT: increasing coverage of the formation by displacement both in thickness and square area, increasing oil recovery of the productive formation and intensifying percent of oil recovery from the reservoir.

3 dwg, 1 ex