Fiber-optic logging method, system, device and medium for depth conversion when connecting a storage instrument

By converting the temperature and pressure data measured by the storage instrument attached to the bottom during the lifting and lowering of the optical cable into time-depth data, the problem of decreased interpretation accuracy caused by temperature drift in optical fiber logging is solved, and efficient utilization and accurate interpretation of optical fiber logging data are achieved.

CN117489328BActive Publication Date: 2026-07-21CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2022-07-26
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Temperature drift in fiber optic logging leads to decreased interpretation accuracy. The lack of concurrent wellbore pressure profile data and reference temperature profile results in data waste and interpretation errors in existing methods.

Method used

By converting the temperature and pressure data measured by the storage instrument at the bottom during the lifting and lowering of the optical cable into time-depth data, the temperature and pressure profile data of the electronic instrument are obtained, providing a reference for the temperature drift correction of fiber optic DTS logging, and elastic correction is performed in combination with the actual obstruction points.

Benefits of technology

It improves the interpretation accuracy of fiber optic logging DTS, effectively utilizes logging data, and provides accurate temperature and pressure profile data support.

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Abstract

The application provides a fiber-optic logging hanging storage instrument time-depth conversion method, system, device and medium, which is based on temperature and pressure data measured by a bottom hanging storage instrument in the process of optical cable lowering and lifting, combines with cable car speed measurement data to perform time-depth conversion, and obtains temperature and pressure profile data measured at the same period as DTS logging. The obtained data is used for fiber-optic logging temperature drift correction and data interpretation, so that the utilization value of DTS logging data can be better utilized, and the production contradiction problem can be solved. The application performs time-depth conversion on the temperature and pressure data measured by the bottom hanging storage instrument in the process of logging optical cable lifting and lowering, obtains temperature and pressure profile data of an electronic instrument matched with DTS logging, provides a reference for fiber-optic DTS logging temperature drift correction, provides accurate data support for DTS quantitative interpretation, and effectively improves the interpretation accuracy of fiber-optic logging DTS.
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