"Fracturing" refers to hydraulic fracturing, "flooding" refers to chemical flooding. Fracturing flooding EOR technology has two types: forward and reverse. Forward F-F EOR technology, aiming at the extremely low permeability injection-production imbalance oil field, the remaining oil is difficult to recover Use of high flow rate and pressure equipment, pumping a large amount of water, to provide energy for the oil Wells, and improve the oil recovery. Reverse F-F EOR technology, the oil well is operated according to the mode of "fracturing - flooding - injection - production". After stimulation treatment, the injection well is restored to normal injection, so as to realize effective development of remaining oil.