Integrated analysis of pressure response using pressure-rate convolution and deconvolution techniques for varied flow rate production in fractured formations

The outcomes of this study can be summarized as: 1) Introducing an integrated analysis of pressure behavior using pressure-rate convolution and deconvolution techniques for hydraulically fractured conventional and unconventional reservoirs. 2) Deconvloving pressure response from varied to single flow rate condition by applying multi-linear flow regimes approach collaboratively with decline flow rate model proposed by van Everdingen. 3) Characterizing the impact of variable production rate on pressure response for different reservoir types, configurations, and geometries as well as different hydraulic fracture characteristics. The most interesting points are: 1) The main differences in wellbore pressure behavior between variable and constant flow rate can be seen at early production time. 2) The new flow regime that could be developed for varied flow rate at very early production time is characterized by slope of (1.30−1.35) on pressure derivative curve. 3) Productivity index calculated by deconvolved pressure for variable flow rate is slightly less than the index for constant flow rate at early production time, however, the index has the same value for the two conditions at late production time.