Seismic applications of sonic logs
The continuous sonic log was developed to provide a detailed record of velocity for seismologists and even today the majority of sonic logs are run for this purpose, particularly in intermediate and surface runs. An examination of the principle of sonic tools currently used indicates some often overlook limitations, which can cause severe errors from the seismic point of view (ironically, particularly in surface and intermediate logging runs) even when the logs are routinely calibrated by a well-shoot velocity survey. Improved techniques for log calibration by well-shoot velocity surveys now compensate for limitations of present tools, and new tools which are far less limited are being developed. These will need careful evaluation by the industry. Although current developments may possibly reduce the seismic importance of sonic logs, improved tools will benefit the log analyst.
- Research Organization:
- British Petroleum Co., Ltd., London, Eng.
- OSTI ID:
- 6480359
- Journal Information:
- Log Anal.; (United States), Journal Name: Log Anal.; (United States) Vol. Vol. 19:1; ISSN LGALA
- Country of Publication:
- United States
- Language:
- English
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