Page 367 - Fundamentals of Reservoir Engineering
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NATURAL WATER INFLUX 302
which is expressed in Darcy units. The corresponding equation in field units, with t
measured in hours, is
3
−
∆
W = 3.26 10 hw φ kct x p (bbls) (9.14)
×
e
πµ
Note that dimensionless time is not used in the above equations.
4.0
= 4.0 = 3.5
r eD r eD
3.5 = 3.0
r eD
=
r eD
3.0
r= 2.5
eD
2.5
W D 2.0
r= 2.0
1.5 eD
1.0
r= 1.5
eD
0.5
0
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
t D
Fig. 9.3 Dimensioniess water influx, constant terminal pressure case, radial flow.
(After Hurst and van Everdingen, ref. 1)
