Binomial-based method and binomial-based system for acquiring absolute open-flow potential of condensate gas reservoir

The invention relates to a binomial-based method and a binomial-based system for acquiring the absolute open-flow potential of condensate gas reservoir. The binomial-based method includes determining a binomial productivity equation under different formation pressures; acquiring relations among a first coefficient, a second coefficient, a third coefficient and a fourth coefficient of the binomial productivity equation via a first formation pressure, a second formation pressure, first natural gas viscosity, a first deviation coefficient, first gas-phase permeability, second natural gas viscosity, a second deviation coefficient and second gas-phase permeability according to the binomial productivity equation; and acquiring the absolute open-flow potential of the condensate gas reservoir under the different formation pressures according to the relations among the first coefficient, the second coefficient, the third coefficient and the fourth coefficient of the binomial productivity equation, known first absolute