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• Mark the various flow regimes -particularly the radial flow period <br /> • Include the derivative of other plots, if appropriate (e.g., square root of time for <br /> linear flow) <br /> • If there is no radial flow period, attempt to type curve match the data <br /> 3. Prepare a semilog plot. <br /> • Use the appropriate time function depending on the length of injection period and <br /> injection rate preceding the falloff <br /> • Draw the semilog straight line through the radial flow portion of the plot and <br /> obtain the slope of the line <br /> • Calculate the transmissibility, kh/µ <br /> • Calculate the skin factor, s, and skin pressure drop, APskin <br /> • Calculate the radius of investigation, r; <br /> 4. Explain any anomalous results. <br /> 8.0 Technical References <br /> 1. SPE Textbook Series No. 1, "Well Testing," 1982, W. John Lee <br /> 2. SPE Monograph 5,"Advances in Well Test Analysis," 1977, Robert Earlougher, Jr. <br /> 3. SPE Monograph 1, "Pressure Buildup and Flow Tests in Wells," 1967, C.S. Matthews <br /> and D.G. Russell <br /> 4. "Well Test Interpretation In Bounded Reservoirs," Hart's Petroleum Engineer <br /> International, Spivey, and Lee,November 1997 <br /> 5. "Derivative of Pressure: Application to Bounded Reservoir Interpretation," SPE Paper <br /> 15861, Proano, Lilley, 1986 <br /> 6. "Well Test Analysis," Sabet, 1991 <br /> 7. "Pressure Transient Analysis," Stanislav and Kabir, 1990 <br /> 8. "Well Testing: Interpretation Methods,"Bourdarot, 1996 <br /> 9. "A New Method To Account For Producing Time Effects When Drawdown Type Curves <br /> Are Used To Analyze Pressure Buildup And Other Test Data," SPE Paper 9289, Agarwal, <br /> 1980 <br /> 7 <br />