Abstract: In ultra-low permeable reservoir of Henan oilfield, large amount of pressure recovery is under the condition of no radial flow, which is affected by wellbore storage. With the application of deconvolution, the wellbore storage effect can be eliminated and the formation fluid characteristics covered by wellbore can be recovered. Therefore, the application can provide better information support for interpretation model identification and formation parameter calculation, and effectively reduce the multiplicity. With the method, the parameters such as pressure variation, permeability can be obtained, which can be used for well testing evaluation.