Abstract: When we analyzed the gas well deliverabilty, we found that the observed bottom hole pressure data scarcely meet the stable requirement. That is to say, when the gas rate is changed, the observed bottom hole pressure is not the desired stable pressure data. In order to get high quality“stable”pres-
sure data, a new method to process well testing data is present-ed in this paper, which treat the well testing data by introduc-ing two average errors. The new method is used to process the abnormal pressure data duo to unstable flow condition, which overcome the limit that well testing take long time to get stable bottom hole pressure data. The results from real case study
show that the new method is practical.

Key words: deliverability estimation, binomial, expo-nent, gas well productivity