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Numerical Simulation of Fracture-flooding in Class III Oil Reservoirs

Daqing oilfield has entered into the stage of extra-high water cut development, and the Class I and Class II Oil Reservoirs have been successively developed and completed chemical flooding, which has a significant recovery efficiency, while the Class III Oil Reservoirs, which are primarily thin and poor reservoirs and out of surface reservoirs, are mainly developed by water flooding, with low water drive recovery. Chemical flooding and stimulation and injection are not effective to further enhance the recovery of the Class III Oil Reservoirs. In view of the special reservoir and development characteristics of the Class III Oil Reservoirs, a new concept of “Class III Oil Reservoirs fracture-flooding to enhance oil recovery” is put forward. By using numerical simulation technology, the seepage field and flooding effect of the Class III Oil Reservoirs before and after fracturing-flooding are studied to provide technical support for the development and exploration of the Class III Oil Reservoirs in Daqing oilfield.