Testing method and device of reservoir permeability of flooded gas area of gas storage

The invention provides a testing method and device of reservoir permeability of a flooded gas area of a gas storage. The method includes: selecting a flooded gas area core sample from the flooded gas area of the gas storage; subjecting the sample to a repeated seepage test preset times, with the single repeated seepage test including a positive gas displacement test and a negative gas displacement test; acquiring in order gauge pressure and flow speed of positive gas displacement and those of negative gas displacement in each single repeated seepage test; and according to the gauge pressure and flow speed of positive gas displacement and those of negative gas displacement, determining post-positive gas displacement gas relative permeability and post-negative gas displacement gas relative permeability. The testing method and device has the advantages that testing permeability of the flooded gas area of the gas storage is achieved and basis is finally provided for the prediction of the capacity of a well in the flooded gas area.