Transcript SAGE 2008 Vibroseis Videos Vibroseis courtesy of ION Geophysical Larry Braile [email protected] http://web.ics.purdue/~braile Last modified: June, 2015 (videos 1, 14, 11, 13, 9; June 30, 2008) Exploring Planet.

SAGE 2008
Vibroseis Videos
Vibroseis courtesy of ION Geophysical
Larry Braile
[email protected]
http://web.ics.purdue/~braile
Last modified: June, 2015
(videos 1, 14, 11, 13, 9; June 30, 2008)
Exploring Planet Earth
SAGE 2008 Budaghers Fault Profile
(video vid00001.wmv)
(video vid00014.wmv)
(video vid00011.wmv)
Vibe Controller (Pelton) – “Triggering the Sweep”
 Watch here
and

here
(video vid00013.wmv)
The “Pad” and the
Sweep (schematic)
Time (10 s) 
10 Hz
80 Hz
Figure 1. Vibroseis Schematic
After Lindseth, 1968
Correlation coefficient is calculated at each
time sample () to form seismogram
Figure 1. Vibroseis Schematic – Cross Correlation with pilot
Coefficient plotted at
location of thin black
line ()
Crosscorrelation: shift, multiply and sum; repeat
After Lindseth, 1968
Figure 1. Vibroseis Schematic – Cross Correlation, 1st Reflection
Arrival Time
Maximum positive correlation at this position
After Lindseth, 1968
Figure 1. Vibroseis Schematic – Cross Correlation, 2nd Reflection
Arrival Time
Maximum negative correlation at this position
After Lindseth, 1968
Figure 1. Vibroseis Schematic – Cross Correlation, 3rd Reflection
Arrival Time
Maximum positive correlation at this position
After Lindseth, 1968
Last VP…
(video vid00009.wmv)
SAGE 2008
Vibroseis Videos
Vibroseis courtesy of ION Geophysical
Also see:
http://web.ics.purdue.edu/~braile/sage/ShortCourseNotes.6.A.Vibroseis.pdf
http://web.ics.purdue.edu/~braile/sage/ShortCourseNotes.6.A.Vibroseis.ppt
Larry Braile
[email protected]
http://web.ics.purdue/~braile
Last modified: June, 2015
(videos 1, 14, 11, 13, 9; June 30, 2008)
Exploring Planet Earth