METHOD FOR DEVELOPMENT OF OIL AND GAS DEPOSITS WITH LOW VERTICAL PERMEABILITY Russian patent published in 2009 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil industry and may be used in development of oil deposits with anisotropic collectors. Method for development of oil and gas deposit comprising oil-bearing bed with vertical anisotropy of bed, consists in determination of collector properties in section of development, as well as anisotropy of bed rocks, drilling of vertical and horizontal wells in zones with proper collector properties of rocks and drilling of horizontal wells with sinusoidal vertical profile in zones with low vertical permeability of collectors. Drilling of horizontal wells with sinusoidal vertical profile is carried out with amplitude of sinusoid of 0.5-0.9 of oil saturated capacity of bed with shift of well trajectory to the side of bed top and maximum permissible angle to plane of rocks stratification in subface and top of bed in section of well arrangement. Extreme values of sinusoid heights that describe well trajectory correspond to minimum values of rock permeability that makes the bed. Minimum distance from well shaft makes not more than 0.5-1.0 metre.

EFFECT: increased efficiency of development due to expanded coverage of oil capacity by draining process.

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