OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2014 - IPC E21B43/20 E21B43/30 

FIELD: oil and gas industry.

SUBSTANCE: according to the method direction of reservoir-scale fractures is determined, drilling of the deposit by producing and injection wells considering direction of natural fracturing of the deposit, injection of working fluid to the injection wells and product recovery from the producing wells are carried out. Horizontal wells are used. Wells are used as elements of square grid pattern. One side of the square grid is placed along the fracturing direction. Horizontal boreholes of producing wells are placed in parallel to each other in staggered arrangement from the centre of one element of square grid pattern up to the centre of the neighbouring element in the grid placed corner-wise, near the roof of the oil-filled formation. In each producing well, in the productive formation, two water-swellable packers are placed, thus dividing the horizontal borehole into three equal parts. Horizontal boreholes of injection wells are placed in the centre of elements between two parallel neighbouring producing wells and made near water-oil contact or the bottom of the oil-filled formation. Producing and injection wells are made with a certain length of their horizontal boreholes to be determined as per the certain analytical expression.

EFFECT: improving coverage ratio and production rate of the productive formation.

1 ex, 1 dwg