METHOD FOR DEVELOPMENT OF OIL DEPOSIT Russian patent published in 2008 - IPC E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil industry and can be implemented at development of oil deposit on natural reservoir drive. Method includes withdrawal of oil via producing, branched in a horizontal plane, curvilinear wells on natural drive. Withdrawal of oil is performed with a cyclic stop and bringing all producing wells into operation. During wells operation withdrawal of oil is carried out till a current bed pressure drops to 60-80% from an initial. Operation of wells is stopped till a current bed pressure restors to 70-90% from an initial bed pressure. In the process of deposit working out producing wells, not restoring a current bed pressure to 70% from an initial pressure, are successively subject to chemical reagents treatment, which allows raising a current bed pressure to 70-90% from an initial bed pressure. Withdrawal of oil is continued from the rest of producing wells within the ranges of oil bearing deposit contour. After that wells, having been subject to chemical reagents treatment, are put into operation in a former mode of cyclic withdrawal of oil from a deposit.

EFFECT: invention facilitates increased efficiency of the method due to possibility to withdraw residual recourses of oil in deposit.

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