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Title: Selection Of Hydraulically Fractured Wells For Workover Using A Regression Analysis Of Fall-Off Tests
Author: Larry E. Coble, John S. Rodgers, John H. Samonsky
Source: American Gas Association 1979
Year Published: 1979
Abstract: After initial fracture stimulations, well performances often show long-term decay in gas deliverability or injectivity which cannot be attributed to normal losses in flow efficiency, Scale buildup, compressor lubricants and fracture healing appear to be major sources of this abnormal decay. A practical procedure for evaluating these effects and selecting wells which should respond most favorably to remedial treatment is presented. This procedure employs a computerized nonlinear regression method to evaluate current fracture conductivity, fracture length, effective matrix permeability and reservoir thickness. Results of these evaluations can also serve as guides for selecting type of remedial treatments.

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