PROCESS OF DEVELOPMENT OF OIL FIELD AT LATE STAGE OF ITS OPERATION Russian patent published in 2002 - IPC

FIELD: oil production, development of multipool oil deposit with irregular degree of collector properties of enclosing rock at late stage of its exploitation. SUBSTANCE: area plugging is conducted by way of pumping of insulation material in the form of clay-cement suspension into pool through all injection wells of field. Plugging is carried out where water content of production wells reaches more than 50% and injection wells have acceptance capacity over 400 cu m/day. In this case pumping is conducted under pressure corresponding pressure of injection line. After it all wells in radius of potential reaction are closed for 2-3 days for consolidation of suspension in pool. EFFECT: raised degree of recovery of residual oil from deposits with poor collector properties at late stage of operation of field.