This work considers the use of Duhamel's principle to analyze pressure drawdown and buildup data when both bottomhole pressures (BHP's) and sandface flow rates are available. This analysis procedure uses Duhamel's principle to convert pressure data obtained when the sandface rate is variable to the equivalent pressure data that would be obtained for a constant sandface rate of production. The equivalent constant-rate pressure data then can be analyzed with standard procedures (semilog analysis or type-curve matching).

Keywords:
method 3, method 1, semilog straight line, denote, rate data, pressure drop, buildup data, straight line, pressure data, drillstem/well testing
Subjects:
Drillstem/well testing, Formation Evaluation & Management, Pressure transient analysis, Well & Reservoir Surveillance and Monitoring
Copyright 1986, Society of Petroleum Engineers
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