Fracturing method for improving recovering ratio by phase permeability improver

A fracturing method for increasing the recovering rate of oil well by use of phase permeability improver features that the hydraulic fracturing method is used to generate artificial crack and the phase permeability improver is filled in the stratum via oil well to form a phase permeability improved zone around the artificial crack, which has the selectivity to the osmotic oil-water flow, reducing the relative permeability of water.