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 developing layer by layer-zonal non-uniform high-viscosity oil or bitumen accumulation. Development method for layer-by-zonal non-uniform high-viscosity oil or bitumen accumulation involves determination of two productive formations separated by aquitard interlayer. Horizontal production well is constructed in the lower formation above water-oil contact. In the upper productive formation, injection well is built with additional down shafts, from which additional plotted by shafts through sections of beds with low permeability with opening of the low permeable interlayer and additional by shafts through sections of formations with high permeability to hydrodynamic message or connection to the production well. Distance between additional down shafts is determined considering technological capabilities of drilling equipment for wiring, as well as with possibility to place between them filters with adjustable transmission lowered into injection well on pipe string located opposite additional shafts not linked with production well and packers insulating annular space of injection well between additional shafts and above filters. Number of pumped heat carrier and extracted product is determined from the properties of enter formations in each additional shaft due to controlled filters.

EFFECT: proposed development method for layer-by-zonal non-uniform high-viscosity oil or bitumen accumulation allows involvement of low-productive formations with thickness less than 10 m, increasing efficiency of oil recovery due to more even heating of productive formations, as well as reducing material costs, since it is possible to disconnect mined-out areas of productive formations, herewith volume of pumped heat carrier is getting reduced.

1 cl, 2 dwg