Vibroseis correlation

From SEG Wiki
Jump to navigation Jump to search
ADVERTISEMENT
Seismic Data Analysis
Seismic-data-analysis.jpg
Series Investigations in Geophysics
Author Öz Yilmaz
DOI http://dx.doi.org/10.1190/1.9781560801580
ISBN ISBN 978-1-56080-094-1
Store SEG Online Store


Figure 1.1-20  Vibroseis correlation: the sweep signal is correlated with the recorded vibroseis record to get correlated field data. A 10-s sweep and 15-s recorded data yield a 5-s correlated record.

One other important process is the vibroseis correlation. This involves crosscorrelation of a sweep signal with the recorded vibroseis trace. The sweep is a frequency-modulated vibroseis source signal input to the ground. The convolutional model for vibroseis data is described in field data examples.

Figure 1.1-20 shows a vibroseis sweep signal, a recorded common-source gather, and the correlated gather. The sweep length is 10 s with a frequency band of 6 to 60 Hz. The 15-s uncorrelated vibroseis record yields a 5-s correlated record. Note that the early part of the uncorrelated record contains low-frequency energy with increasingly higher frequencies at late times. This is because an upsweep (frequency increasing with time) signal was used in this data example.

See also

External links

find literature about
Vibroseis correlation
SEG button search.png Datapages button.png GeoScienceWorld button.png OnePetro button.png Schlumberger button.png Google button.png AGI button.png