Logging the sea floor with bore hole logging systems. [Adaptation of conventional systems to bottom trail logging; review]
Conventional borehole logging systems have been converted so that they can be used for logging sediments of the sea floor for geological mapping, marine engineering, and the exploration of marine mineral deposits. Some of these systems can be used for marine pollution control and for environmental research. The probes, containing several logging systems, are trailed behind a boat on a logging cable, up to four logs working in tandem operation. Conventional logging arrays like focused resistivity, spontaneous potential, induction, gamma/gamma, natural gamma, neutron/neutron, neutron/gamma, acoustic velocity and attenuation, and others have been adapted to the special conditions on the sea floor. Some additional logging systems have been derived from conventional laboratory and other measuring devices. The bottom trail logs have been applied to geologic work in relatively shallow waters of the Mediterranean, the Atlantic coast, and the North Sea. Logging in deep water would need some changes, mainly in cable type and signal transmission.
- Research Organization:
- Technische Univ., Clausthal, Ger.
- OSTI ID:
- 7239848
- Journal Information:
- Log Anal.; (United States), Journal Name: Log Anal.; (United States) Vol. 16:2; ISSN LGALA
- Country of Publication:
- United States
- Language:
- English
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