pengujian drawdown
TRANSCRIPT
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PENGUJIAN DRAWDOWN
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A pressure drawdown test is simply a series of bottom-hole pressure
measurements made during a period of flow at constant production rate.
Usually the well is closed prior to the flow test for a period of time sufficient to allow
the pressure to stabilize throughout the formation, i.e., to reach static pressure.
1. PRESSURE DRAWDOWN TEST
As discussed by Odeh and Nabor,1 transient flow condition prevails to a
value of real time approximately equal to
Semi-steady-state conditions are established at a time value of
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Idealized rate schedule and pressure response for drawdown
testing
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Idealized rate schedule and pressure response for drawdown
testing
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Three periods for
analysis:
• Transient or early flow
period is usually used to
analyze flow
characteristics;
• Late transient period is
more completed; and
• Semi-steady-state flow
period is used in
reservoir limit tests.
FLOW HISTORY CLASSIFICATIONS
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