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Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Saphir Guided Session #8 • SapGS08- 11/11
The flow regimes can be observed on the Loglog plot by fitting specialized lines on the
drawdown derivative. The dotted line indicates the time of closure, and we can fit a negative
unit slope at late time corresponding to the observed pseudo-radial flow. We can also
recognize in this plot a linear flow pattern prior to the fracture closure:
Fig. B02.9 • Loglog plot with drawdown derivative
and a negative unit slope specialized line (‘Minifrac – Radial’).
The obtained results can be seen in the results dialog of the Loglog plot and give from the late
time radial flow a value of kh = 2.51 md.ft - note that since we are on a Loglog scale this value
is very sensitive to the exact location of the specialized line. This corresponds to a far-field
mobility of 0.05 md/cp in good agreement with the results obtained from the A.C.A plot used
in minifrac analysis.