Water invasion amount calculation method considering influence of condensate water in gas for water-driven gas reservoir

The invention relates to a water invasion amount calculation method considering the influence of condensate water in gas for a water-driven gas reservoir, which comprises the following steps of: obtaining formation water, and testing the mineralization degree Kd of the formation water; obtaining condensate water, and testing the mineralization degree Kn of the condensate water; preparing a mixed water sample and the volume fraction fj of formation water, and testing the mineralization degree Kj of the mixed water sample; drawing a Kj-fj relation curve, and establishing a relational expression between the mineralization degree Kj of the mixed water sample and the volume fraction fj of the formation water; production data of the gas reservoir in different production time periods are obtained, and the formation water quantity Qdi produced by the gas reservoir in the different production time periods is determined; the accumulated formation water yield and the accumulated natural gas yield of the gas reservoir ar