Technology and effect of small well spacing control decline in close well network

The Third operation area of No.1 Oil Production Plant of Daqing Oilfield Co., LTD ; heilongjiang daqing 163000, China

Abstract

In order to further improve oil recovery, water flooding was adjusted for three times from 2009 to 2012. The spacing of injection-production Wells was shortened from 250 meters to 106 meters, and the density of well pattern increased from 90.7 to 196 per square kilometer. This leads to the problems of “rapid rise of water cut, large difference in oil formation production, and large production decline in block u”. In recent years, we by fine geologic research, to improve the poor thin oil layer use condition, controlling water cut rising velocity, as the key point, the energy recovery network continuously grope for dense well spacing control regulation technology, gradually formed dense well network from decreasing “three-excellent” control technology, through the effective implementation, improved the block development effect, achieve the goal of stabilizing oil water control.