Additional insights regarding 1/2 slope pressure derivative during Pressure Transient Analysis and possible causes beyond tradicional two parallel fault interpretation
1. RE_Fluid-Flow_PTA
Pressure Derivative
• Pressure Derivative was introduced by
Dominique Bourdet (1983).
• Distinctive straight lines were used to
characterize well-reservoir system response,
for the drawdown solution.
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Kappa®
2. RE_Fluid-Flow_PTA
1/2 Slope Derivative
• One of them is the 1/2 slope straight line, associated with linear flow.
• Typically linear flow is observed in below cases, the first one during
Early-Time Region (ETR) and the second one during Late-Time Region
(LTR).
Hydraulically fractured well Parallel Faults (Boundaries)
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3. RE_Fluid-Flow_PTA
But Geology…
• Geology reminds us that PTA is a non-unique solution technique, due
to the inverse nature of the problem.
Turbidites Deposits Parallel Faults
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