DEVELOPMENT METHOD OF LAYER-BY-ZONAL HETEROGENEOUS SUPERVISCOUS OIL OR BITUMEN Russian patent published in 2016 - IPC E21B43/24 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in development of sandwich-type high-viscosity oil or bitumen accumulation. In development method for layer-by-zonal non-uniform high-viscosity oil or bitumen accumulation, which involves determination of productive formations separated by low permeable interlayers, construction in the lower formation above water-oil contact of horizontal well with additional uprising shafts, opening up upper beds, heat carrier pumping and product extraction, the distance between additional ascending shafts is determined considering technological capabilities of drilling equipment for wiring, as well as with possibility to accommodate filters with adjustable transmission lowered into horizontal well before pumping heat carrier at the pipe string and located opposite additional uprising shafts, as well as packers insulating annular space of horizontal well between additional ascending shafts and above filters. Number of pumped heat carrier and extracted product is determined from the properties of enter formations in each additional ascending shaft due to filters with adjustable transmission, the heat carrier pumping and product extraction is performed successively from the pipe string.

EFFECT: technical result - involvement in development of low-productive formations with thickness less than 10 m, higher efficiency of oil recovery due to more even heating of productive formation, as well as reducing material costs, since it is possible to disconnect mined-out areas of productive formations and reduce volume of pumped heat carrier.

1 cl, 2 dwg