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Title: A New Method For Determining Flow Characteristics Of Fractured Wells - Application To Gas Wells In Tight Formations
Author: J.O. Scott
Source: American Gas Association 1978
Year Published: 1978
Abstract: An analytical method is developed which describes transient flow and pressure buildup behavior of fractured wells by means of a time power function. The method is shown to fit type curves derived for limited flowcapacity fractures. Equations developed allow superposition of production and buildup transients using the time power function in a manner similar to a Horner buildup analysis. The pre-radial transient behavior is linearized by the method. A correlation is made with the determined power of time and a dimensionless fracture fiow capacity function which allows determination of fracture flow capacity and fracture length when formation permeability and effective well radius is known. An example is shown of applying the method to a fractured gas well in a tight formation, A summary of a large number of analyses of other gas wells in tight formations is also presented which indicate a range of fracture flow capacities and fracture lengths much lower than expected from fracture treatment designs.

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