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Dynamic Data Analysis – v5.12.01 - © KAPPA 1988-2017 Chapter - p74/743
3.C.6 Bourdet Derivative & other flow regimes
We are not going to describe exhaustively the list of flow regimes that can be successfully
identified using the Bourdet derivative. The short answer is: ‘a lot’. The table below shows a
list of the most frequently used flow regimes in PTA, together with the chapter of the DDA
book where this will be covered in more details:
Model Regime p slope p' slope DDA chapter
Storage Storage 1 1 Wellbore
Fracture Linear 0.5 0.5 Well
Fracture Bilinear 0.25 0.25 Well
Limited Entry Spherical - -0.5 Well
Homogeneous IARF - 0 Reservoir
Channels Linear 0.5 (late) 0.5 Boundary
Closed PSS 1 (late) 1 Boundary
As an appetizer, below is a loglog plot of some of these flow regimes:
Fig. 3.C.3 – Bourdet Derivative and various flow regimes