METHOD OF DEVELOPMENT OF OIL DEPOSIT Russian patent published in 2012 - IPC E21B43/16 

FIELD: oil-and-gas production.

SUBSTANCE: proposed method comprises drilling injection and production wells, injecting working agent through injection wells, extraction of oil through production wells, isolating dome-like elevations exceeding bed absolute mark to arrange auxiliary wells thereat and to drill in production bed above its drowned part but below its roof, and isolating drowned part of exposed production bed in wells. Bed is drill in from bottom to roof. Drowned part of drilled-in bed in production and injection wells is isolated by injecting cementing hydrophilic polymer solution below water-oil contact. Thereafter production well is equipped with separation filters. As yield of said production wells decreases by previous output by 25-30%, both production and injection wells communicated therewith are shut in for process pause. Then, operation of both wells is resumed. The above descried process is repeated to complete drowning of the bed. Then, production wells are deactivated while injection wells communicated with auxiliary wells are rendered injection wells to inject working agent therein. Auxiliary wells are arranged at the highest points of dome-like elevations and represent horizontal and/or subhorizontal boreholes above water-oil contact at minimum distance therefrom along descending profile to allows waterless operation.

EFFECT: longer water-free operation, reduced of well production.

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