Method for acquiring multiphase seepage characteristics of gas storage

The invention provides a gas storage multiphase seepage characteristic acquisition method, which comprises the following steps of: determining a corresponding first water saturation based on a first resistance value of a target rock core at each first time point; based on the first water saturation, the first water phase relative permeability and the first gas phase relative permeability at the multiple first time points, a first relation curve of the water-gas relative permeability and the water saturation corresponding to the gas-drive-water stage is determined; determining a second water saturation based on a second resistance value of the target core at each second time point, determining a second relation curve of the water-gas relative permeability and the water saturation corresponding to the water-gas stage on the basis of the second water saturation, the second water-phase relative permeability and the second gas-phase relative permeability at a plurality of second time points, and analyzing the firs