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  1. 01-27-2013, 12:01 PM #1
    amahaminer
    amahaminer is offline Senior Member

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    Prssure Derivative For Drawdown Test

    Hi all , i have a question in paper "Interpretation of Multirate Tests by the Pressure Derivative - I. Oil Reservoirs" SPE 53935 ,copy attached

    in Example 1 when calculating :Prssure Derivative For Drawdown Test, i donot know the equation he used to get the highlighted results for derivative , could u help me with the equation.

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    Last edited by amahaminer; 01-28-2013 at 10:12 AM.
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