METHOD OF HIGH-VISCOSITY OIL POOL DEVELOPMENT BY A SYSTEM OF WELLS WITH SIDE HORIZONTAL SHAFTS (SHS) Russian patent published in 2016 - IPC E21B43/00 E21B43/16 E21B43/30 E21B7/04 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in development of deposits of high-viscosity oil with water-oil zones of small thickness. In according with method chose oil-saturated section of the deposit, with dynamic viscosity more than 400 mPa·s and with water-oil zone, where the thickness of the oil part formation exceeds 10 m, a water-bearing - is not more than 5 m. Section is drilled with fill-spot elements of vertical wells. From vertical shafts of each well carry out drill in productive layer from one to four BGS with controlled filters. Each BGS is placed towards the neighbor well, receiving so system of opposite BGS. Length of each BGS is carried out 0.4-0.5 from the distance between neighbor vertical wells. Vertical distance between opposite BGS in the productive layer is provided by no more than 2 m. In vertical bores of wells is perforated water bearing part of the layer. In each well is lowered two columns of pipes. One of these pipes packed at oil-water contact. In each element central well is used for plumbing working substance in circulation mode through this columns of pipes. Extraction of the plumped mixture is carried out through the neighbor wells on the specified columns of pipes. Second columns of pipes packed above the roof of productive layer and through them carry out selection of production of layer through BGS. As working substance apply mixture of water with temperature of more than 50 °C, nitrogen and solvent. Optimal ratio of components of mixture is determined by laboratory investigations of oil displacement on cores.

EFFECT: technical result - increase of coefficients of coverage and oil recovery of deposits of high viscous oil.

1 cl, 1 ex, 2 dwg