Screenout Early-Warning
Live bridging-risk monitor based on perf/proppant geometry, entry velocity, concentration headroom and pressure trend (§8.1).
Live inputs
d = 0.0120 in
w/d_p = 12.5 · clear
OK
24%composite bridging risk
Binding factor: Entry velocity 432 ft/s per perf (watch > 30)
Pumping window healthy. Proceed as designed.
Perf / proppant ratio
0%
D/d = 35.0
Entry velocity
100%
432 ft/s/perf
Concentration
3%
1.0 of 4.0 PPA
Pressure trend
33%
+19 psi/sample
Forward ramp projection (0.25 PPA/min)
Risk projected forward assuming the current ramp continues. The first minute the orange curve crosses the WARN line is when you should act.