Abstract: A method for simultaneous-solution of one-point binomial is established for using the abnormal data or curves from systematic well test of gas well to evaluate the productivity and inflow performance of multilayer gas pool and reasonably clasify the layer series of development. The uniquely indicative curve and unique curve of inflow performance curve from each layer in gas well are based on the processing of these abnormal well test data. Also, the productivity, interlayer interference and corresponding processes of selective zone production and full zone production are analyzed and applied to the case study. The results show that this method can be used for quantitatively evaluating the interference of mulilayer gas pool, thus determining the rational production or recovery process.

Key words: gas reservoir, systematic well testing, anomaly, interlayer interference, recovery process