DEVELOPMENT METHOD OF OIL DEPOSIT WITH LAYER-BY-LAYER HETEROGENEITY Russian patent published in 2012 - IPC E21B43/20 E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling of vertical, horizontal and inclined wells as per any of the known well patterns; determination of boundaries of zones with various permeability; installation of packer in wells at the boundary of zones; pumping of displacing fluid to each zone through injection wells and extraction of the product from the bed of each zone through injection wells. Thickness of effective oil saturation is determined for the deposit. Well pattern is compacted with additional wells to 1-4 ha/well. Additional wells are drilled in inclined direction with the deposit length equal to 2-3 of thickness of effective oil saturation. Zones with various permeability are determined. Acid treatment is performed in the deposit zone with lower permeability. Fluid is pumped through injection wells and the product is extracted through production wells above and below the boundary of zones with various permeability. Additional wells are drilled with smaller diameter than that of the rest wells.

EFFECT: increasing oil deposit efficiency with layer-by-layer heterogeneity.

2 cl, 2 dwg