Due to the limitations of technology, wellbore condition and other various
factors in the waterflooding gas reservoir with abnormal high pressure, it is impossible to load the pressure gauge into bottomhole to record
test data. Based on the traditional productivity testing and evaluation principles, a gas well productivity equation considering stress
sensitivity was established by combining with the development performance of gas reservoir with abnormal high pressure. A set of production
evaluation and forecast methods for the gas reservoir with abnormal high pressure was established by considering the gas well geology, critical
water coning production and pressure drop, stable production period, critical liquidcarrying production, reasonable formation energy utilization
and other aspects. The relative error between the productivity forecasts of four wells in Kela2 gas field and that of productivity testing is
within 10%. This method can be used to determine singlewell productivity, reasonable production pressure drop, allocation and gas well real
time productivity, which could provide certain theoretical basis for production adjustment and management.