Page 237 - Reservoir Formation Damage
P. 237
Single-Phase Formation Damage by Fines Migration and Clay Swelling 217
i.o
FLUID: CoCI 2
k, = 110 md
0.8
0.6
0.4
SLOPE = -.0347l/min
0.2 INTERCEPT =.0268
0.0
10 15 20 25 30
TIME (Min)
Figure 10-11. Diagnostic chart for cake forming by calcium chloride-based
completion fluid invasion (after Wojtanowicz et al., ©1987 SPE; reprinted by
permission of the Society of Petroleum Engineers and after Wojtanowicz et
al., ©1988, reprinted by permission of the ASME).
i.o
o NH 4N0 3
0.8
0.6
0.4
0.2
o.o
25 50 75 100 125
TIME ( Min)
Figure 10-12. Diagnostic chart for gradual pore blocking by ammonium
nitrate/alcohol-based completion fluid invasion (after Wojtanowicz et al.,
©1987 SPE; reprinted by permission of the Society of Petroleum Engineers
and after Wojtanowicz et al., ©1988, reprinted by permission of the ASME).
