PROCEDURE FOR DEVELOPMENT OF NON-UNIFORM RESERVOIR Russian patent published in 2011 - IPC E21B43/20 

FIELD: oil and gas production.

SUBSTANCE: procedure consists in withdrawal of oil through at least one producer with at least one not operating pressure well till reservoir pressure becomes lower, than initial reservoir pressure. Further, the procedure consists in shutdown of the producer, in putting the pressure well into operation, in pumping water through the pressure well till reservoir pressure exceeds the level reached during withdrawal of oil through the producer. The reservoir is developed at periodic operation of the producer. According to the invention oil is withdrawn through the producer till reservoir pressure reaches 0.6 of initial reservoir pressure exceeding pressure of saturation of oil with gas for a value of pressure drop - depression between the reservoir and bottom hole of the producer. Further, the producer is shut down for a period of time till pressure rises in zone of oil withdrawal facilitating balanced reservoir pressure in area and sub-crop. Upon pressure recovery in area and sub-crop the pressure well is put into operation. Water is pumped through the pressure well till reservoir pressure reaches 0.8 of initial reservoir pressure. Further, the pressure well is shut down for a period of time required for re-distribution of pressure between the zone of pressurising and zone of oil withdrawal, upon completion of which, the producer is re-started.

EFFECT: development of deposit eliminating influence of boundary zone and high hydro-dynamic connection between wells through separate thin interlayers or fissures.

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