Sandstone oil reservoir coring saturation correction method

The invention relates to a sandstone oil reservoir coring saturation correction method, and belongs to the technical field of oil and gas reservoir evaluation. The correction method comprises the following steps: establishing a relational expression between a ratio of oil-water two-phase permeability and ground measurement water saturation; obtaining ground measurement water saturation and ground measurement oil saturation; determining a corresponding oil-water two-phase permeability ratio according to the ground measurement water saturation and the relational expression; calculating to obtain a water volatilization amount correction value and an oil volatilization amount correction value according to the ground measurement water saturation, the ground measurement oil saturation and the corresponding oil-water two-phase permeability ratio; and further obtaining the first water saturation and the first oil saturation. According to the method, the volatilization amount errors of the ground measurement water sat