Optical fiber sensing equipment detecting oil-water interface of storage pot

Abstract

The invention provides optical fiber sensing equipment detecting oil-water interface of a storage pot and relates to the technical field of oil field measuring. Oil-water liquid surface can be monitored in real-time and with accuracy by monitoring of various temperatures of different medium layers such as air, an oil layer, an emulsion layer and a water layer of the oil storage pot. The optical fiber sensing equipment detecting oil-water interface of the storage pot comprises a ripple pipe vertically disposed in the oil storage pot. The bottom of the ripple pipe is provided with a horizontal base seat; an armored temperature measuring optical fiber winds the ripple pipe; the armored temperature measuring optical fiber at least comprises two multi-mode temperature-sensing optical fibers backing up for each other; the optical fiber sensing equipment further comprises a temperature sensor and a distributing optical fiber host; and the temperature sensor is connected with the distributing optical fiber host via the multi-mode temperature-sensing optical fibers.

Description

technical field [0001] The invention relates to the technical field of oilfield measurement, in particular to an optical fiber sensing device for detecting the oil-water interface of a storage tank. Background technique [0002] In the process of oil field production, the extracted crude oil will be subjected to multiple processes after being measured at the metering station, such as: heating and sedimentation, separation and dehydration, etc., and finally sent to the refined oil storage when the water content reaches the standard Can. It is worth noting that during the above production process, since the wellhead fluid contains various components, such as oil, water, gas and a small amount of sediment, etc., it is necessary to measure the oil-water interface at any time. The detection results will have an important impact on subsequent steps such as oil-water separation, automatic control of oil storage tank liquid level, etc. If they cannot be accurately measured, it may ...

AI Technical Summary

Problems solved by technology

However, in the actual detection process, the inventors found that since oil-water emulsion mixtures of different forms can be formed after mixing oil and water, an emulsified layer with random changes in viscosity, concentration, mineral content and other parameters is formed at the oil-water interface, and thus As a result, the existing measuring instruments will have large errors in the measurement and may even fail to read; on the other hand, due to the high cost and difficult maintenance of the testing equipment itself, it often cannot meet the technical effect of real-time monitoring of the oil-water interface of the oil storage tank

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