03-Bounded Reservoir Behavior

03-Bounded Reservoir Behavior - Bounded Reservoir Behavior...

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Bounded Reservoir Behavior 1
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Bounded Reservoir Behavior 2
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Bounded Reservoir Behavior 3
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Bounded Reservoir Behavior 4
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Bounded Reservoir Behavior 5
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Bounded Reservoir Behavior 7
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Bounded Reservoir Behavior 8 • No boundaries encountered during the test
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Bounded Reservoir Behavior 9 Flow regimes that may occur during drawdown • Wellbore storage • Radial flow
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Bounded Reservoir Behavior 10 Flow regimes that may occur during buildup • Wellbore storage • Radial flow • For shutin times much larger than producing time, derivative with respect to time has slope of -1 • May appear to be a constant pressure boundary if analyzed assuming producing time is long compared to shutin time
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Bounded Reservoir Behavior 11 • Derivative with respect to equivalent time is horizontal for all values of producing time prior to shutin
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Bounded Reservoir Behavior 12 • Derivative with respect to equivalent time, plotted vs. shutin time is horizontal for all values of producing time prior to shutin
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Bounded Reservoir Behavior 13 • Single no-flow boundary encountered during the test • Well must be much closer to one boundary than to any others
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Bounded Reservoir Behavior 14 Flow regimes that may occur during drawdown • Wellbore storage • Radial flow • Derivative doubles over about 1 2/3 log cycles • Hemiradial flow Similar responses • Transient dual porosity response • Buildup test where the rate is cut in half shortly before shutin but test is analyzed assuming constant rate
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Bounded Reservoir Behavior 15 Flow regimes that may occur during buildup • Wellbore storage • Radial flow • Derivative with respect to time has slope of -1 for shutin times much longer than producing time • May or may not see hemiradial flow
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Bounded Reservoir Behavior 16 • Derivative with respect to equivalent time doubles over a tiny fraction of a log cycle for short producing time
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03-Bounded Reservoir Behavior - Bounded Reservoir Behavior...

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