A new telemetry system enables remote point recording of electrical well logs. Simultaneously with logging operations on offshore Louisiana wells, film records are being produced in a New Orleans ofice more than 100 miles away. The system, using microwave as a data link, was installed to reduce costly shut-down time caused by delays in transporting logs to the ofice, and to extend well coverage by key personnel.At the well site, simultaneously with the recording o f an optical log, a portable quantizer converts log data to digital signals suitable for transmission over microwave and/ or telephone facilities. A t the receiving end the transmitted data are decoded into analog signals and recorded on film in a standard optical recorder. The film recording at the receiver is synchronized with the offshore logging operation and the log is available at the ofice as soon as at the well.A n alternate procedure is to record the digital output on magnetic tape for subsequent transmission. This procedure is used when microwave facilities are not immediately available on the well platform. The tape may then be taken to the nearest microwave station or telephone for transmission.The system is applicable to the transmission o f most types of electrical well logs. Induction-electrical surveys and Sonic logs have been successfully transmitted.
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