Intelligent well testing steel wire for distributive optical fiber detection

Abstract

The invention discloses an intelligent well testing wire for a distributive optical fiber detection. The intelligent well testing wire comprises a steel wire body, an optical fiber unit and sealing adhesives; the steel wire body is a steel wire provided with a groove; the optical fiber unit is located in the groove of the steel wire; the groove is filled with the sealing adhesives; the optical fiber unit is fixed in the groove by the sealing adhesives; and the internal maximum width of the groove of the steel wire body is larger than the width of an opening. The intelligent well testing wire has the beneficial effects that under-well data can be acquired in real time by the intelligent well testing steel wire; the intelligent well testing wire can not only be used for descending length correction of the steel wire, but also can be used for acquiring under-well tension, well deviation and shocking data. The optical fiber unit can used for transmitting data in real time, so that duplex communication is realized; under-well pressure, flow and other well testing data are transmitted in real time; the intelligent well testing wire can also serve as a distributive sensor for sound wave / vibration and temperature; the full-thread environment parameters of the steel wire are monitored; a conventional well testing instrument is replaced, and distributive physical parameters which are difficult to monitor in the prior art are provided; and the purchasing cost of the well testing instrument and equipment is greatly lowered.

Description

technical field [0001] The invention relates to the field of well test steel wires in the petroleum industry, in particular to an intelligent well test steel wire for distributed optical fiber detection. Background technique [0002] So far, the function of well testing steel wire is relatively simple, and its main function is to transport downhole tools during oil and water well testing, and complete measurement and fishing work. Under the action of the steel wire's own weight and the weight of the instrument, the steel wire produces plastic deformation during the downhole process, resulting in inaccurate depth calibration of the steel wire, which largely depends on the experience of the operator and the effective design of the tool, and cannot be real-time according to the downhole situation. Take measures; in addition, the application of distributed and discrete optical fiber sensing in oil and gas field development has gradually received more attention and has increasing...

AI Technical Summary

Problems solved by technology

Under the action of the steel wire's own weight and the weight of the instrument, the steel wire produces plastic deformation during the downhole process, resulting in inaccurate depth calibration of the steel wire, which largely depends on the experience of the operator and the effective design of the tool, and cannot be real-time according to the downhole situation. Take measures; in addition, the application of distributed and discrete optical fiber sensing in oil and gas field development has gradually received more attention and has increasingly broad application prospects, but the downhole applications of optical fibers are mostly in the form of special load-bearing optical cables. Complex and expensive, and the optical fiber sensing sensitivity and measurement accuracy wrapped in capillary steel pipe and double-layer armored thin steel wire are also seriously affected

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