8. With 500 ms AGC
Dead and Noisy Traces
Dead
Noisy
9. Dead and Noisy Traces
Observation:
• Random seismic records viewed from 3 days of production to determine a
representative % of dead and noisy traces.
• Dates selected were from days before and after a the 3 day shutdown for
rain.
• Dead trace: A trace that has 0 amplitude for the entire record length, due
to a damaged GSR box, dead battery or a bad connection.
• Noisy Trace: A trace that has no useable data for the entire record length,
usually due to a bad geophone plant.
• Noisy Traces Not Counted: If the source of the noise was beyond the
control of the crew. Such as noise from road and highway traffic,
helicopter/LZ activity, pump jacks, oil field activity, powerlines, power
stations, etc.
Date Traces Viewed Dead Traces Noisy Traces % Dead/Noisy
Sept 29, 2015 18,000 129 187 1.76%
Oct 6, 2015 23,000 263 209 2.05%
Oct 8, 2015 23,250 339 164 2.16%
Total 64,250 731 560 2.01%
14. Mid-Offset Line: 22-27 mph Wind
Trace Scaling - Normalized
Note: Increase in pre-first
break wind noise
And marginal Signal/Noise
Ratio
15. Mid-Offset Line: 30+ mph Wind
Trace Scaling - Normalized
Note: Unacceptable pre-
first break wind noise and
low Signal/Noise Ratio in
zone of interest
