Page 329 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2
P. 329
Reservoir Engineering
IO
I
0.1
0.01 I I I 1
0.5 1.0 IO I00 1000
FLOOD FRONT RAD1 US, FEET
Figure 5-170. Change in injectivity at varying radial distances for different
mobility ratios [298].
(5-230)
where oilfield units of B/D, md, cp, ft, and psi are used, and
rob = radius of the oil bank, r, 5 rob S d/&
rf = radius of the flood-front saturation
Both rob and rf can be obtained by a material balance on the injected water:
W, = n(r:-r:)(S, -S,)h$ (5-231)
(5-232)
