OIL RESERVOIR DEVELOPMENT METHOD Russian patent published in 2008 - IPC E21B43/16 

FIELD: petroleum industry.

SUBSTANCE: invention is referred to petroleum industry and can be applied for development of oil reservoir developed by depletion. Invention ensures higher efficiency of the method due to recovery of oil remaining reserves in the reservoir. The method includes oil recovery by depletion via producing horizontally branched wells, oil being recovered by cyclic operation of all producing wells. When wells are started up, oil is recovered until current reservoir pressure is drawdown to 60-80% of initial reservoir pressure. Wells are shutdown until current reservoir pressure is restored to the value of 70-90% of initial reservoir pressure. If during reservoir development process any of the producing wells fail to restore current reservoir pressure to 70% of initial reservoir pressure, the said producing wells shall be converted to injecting wells with continuous pumping. Oil is recovered from remaining producing wells in the same process.

EFFECT: higher efficiency of oil well production.

1 ex, 2 dwg