PROCEDURE FOR DEVELOPMENT OF OIL DEPOSIT Russian patent published in 2011 - IPC E21B43/20 

FIELD: oil and gas production.

SUBSTANCE: at development of oil deposit working substance is pumped through pressure wells and liquid is withdrawn via producers under non-steady mode with change of output from maximal to minimal. Annular space of the well is isolated above an interval of perforation. The non-steady mode is evidenced with pulsating change of bottomhole pressure at analysis of a curve of pressure recovery - CPR. Values of maximal and minimal output are determined by minimal and maximal pressure on the CPR and by a curve of influx, when pressure pulse change begins and stops and the well starts operation under a stable mode. Duration of operation with maximal and minimal output is determined by time of non-stable mode completion. Withdrawal of liquid is performed from depth below interval of perforation under mode approaching maximal, but not more, than value of oil degassing and close to minimal, but not less, than failure of supply at bottomhole pumping equipment.

EFFECT: reduced volume of associated water and increased coefficient of oil extraction.

1 ex, 6 dwg