Inverse problem to pressure convolution trying to find unit-rate transient responses which relate recorded pressure variation to flowrate variation historyto pressure convolution, performed as a fully or semi-automated search for initial pressure for every well and Unit-rate Transient Responses (UTR) for wells and cross-well intervals in order to fit the sandface pressure response (usually recalculated from PDG data using wellbore flow model for depth adjustment ) to total sandface flow rate variation history (usually recalculated from daily allocations based on surface well tests).
The Pressure Deconvolution techniques are usually classified into the following options which use specific mathematical apparatus and deliver different volume of information:
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