OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2012 - IPC E21B43/00 E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: oil deposit development method involves the stage at which the structure plan of productive formation is performed. Values of average quantities of absolute levels drop of productive formation in vertical plane are calculated considering the structure plan of day surface in wells drilled along each chosen line between watershed and river or ravine-clough zones in the range of deposit. Effective and/or total oil-saturated thickness of productive formation is determined. Production and injection wells are corrected and drilled along each chosen line in sections of rise of absolute levels on the structure plan on productive formation roof. Besides, direction and offset ℓ of rise along the horizontal is determined on the basis of rise offset at superimposition of structure plans via two various reflecting horizons. Average values of absolute levels on the structure plan on productive formation roof in the deposit are specified with regard to those wells for which absolute levels H₁, H₂ on the structure plane have been taken for roof of productive formation and P₁, P₂ on the structure plan of day surface. Absolute level of well input point to formation Ha₁ is corrected and specified absolute level H₃ of well input point to productive formation is determined. After that, absolute levels of input points of production and injection wells to productive formation are corrected; at that, horizontal and inclined horizontal wells have formation input angle that is not more than angle б of rise offset at well input point to the formation.

EFFECT: improving the well arrangement accuracy, which allows enlarging manufacturing capabilities of oil deposit development.

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