The Analysis of Gas Well Test Data Distorted by Well bore Storage Using an Explicit Deconvolution Method
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abstract
A new method is presented for analyzing gas well test data distorted by wellbore storage. The method is an explicit deconvolution method which is independent of the reservoir model. The deconvolution procedure corrects test data influenced by wellbore storage and yields the pressure profile that would have existed had the afterflow rate been zero. Deconvolved data may then be analyzed using conventional semilog and type curve techniques. This new deconvolution method has an explicit solution; i.e., a single formula corrects for the wellbore storage effect using measured bottomhole pressure and sandface flowrate. Previously introduced methods are tedious and difficult to apply. This method is much faster, gives equitable accuracy, and is easy to use.
