Method and device for realizing online measurement for single-well water content of crude oil in oil well by virtue of gas-liquid separation

A gas-liquid separation device and gas-liquid separation technology, applied in the direction of measurement, wellbore/well components, earthwork drilling and production, etc., can solve the problems of large gas volume, impact, gas-liquid inability to separate the measurement accuracy of oil wells, etc., and achieve low production costs , accurate measurement, light weight effect

Active Publication Date: 2015-12-23
JINZHOU JINYAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the prior art that oil wells have a large gas volume and cannot be separated from gas and liquid, which affects the measurement accuracy, and provide a method and device for on-line measurement of water content in crude oil in a single oil well by using gas-liquid separation

Method used

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  • Method and device for realizing online measurement for single-well water content of crude oil in oil well by virtue of gas-liquid separation
  • Method and device for realizing online measurement for single-well water content of crude oil in oil well by virtue of gas-liquid separation
  • Method and device for realizing online measurement for single-well water content of crude oil in oil well by virtue of gas-liquid separation

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Embodiment 1

[0030] Such as Figure 1 ~ Figure 2 As shown, the present invention includes a radio frequency moisture analyzer 8 on which a signal cable 10 , a wireless transmission module 9 and a probe 5 are arranged. A gas-liquid separation device is set on the radio frequency moisture analyzer 8; the gas-liquid separation device includes a closed outer tube 2 and an inner tube 3 made of a body, an upper end plate 1 and a lower end plate 15; two upper tubes on the outer tube 2 side opening, the outer pipe 2 communicates with the mixed liquid inlet of the wellhead pipeline 11 through the opening on one side and the shorting flange 13, and the inner pipe 3 communicates with the opening on the other side of the outer pipe 2 through the pipe section 12 and passes through the side opening The hole, the shorting flange 13 and the mixed liquid outlet of the wellhead pipeline 11 communicate. The lower end of the inner pipe 3 is closed and protrudes outside the outer pipe 2 as the installation en...

Embodiment 2

[0033] Such as Figure 3 ~ Figure 4 As shown, the present invention has a radio frequency moisture analyzer 8 on which a signal cable 10 , a wireless transmission module 9 and a probe 5 are arranged. A gas-liquid separation device is set on the radio frequency moisture analyzer 8; the gas-liquid separation device includes a closed outer tube 2 and an inner tube 3 made of a body, an upper end plate 1 and a lower end plate 15; two upper tubes on the outer tube 2 Side openings form a mixed solution inlet and a mixed solution outlet, the mixed solution inlet communicates with the outer tube 2, the mixed solution outlet communicates with the inner tube 3 through a pipe section 12, and the mixed solution inlet and the mixed solution outlet are connected by a short connection method The flange 13 is connected to the wellhead pipeline 11, the upper end of the inner pipe 3 is closed and protrudes outside the outer pipe 2 as the installation end, and the installation end is fixed with a...

Embodiment 3

[0036] Such as Figure 5 ~ Figure 6Shown, the present invention comprises radio frequency moisture analyzer 8, is provided with signal cable 10, wireless transmission module and probe 5 on radio frequency moisture analyzer 8, is provided with gas-liquid separation device on radio frequency moisture analyzer 8, and described gas-liquid separation The device includes a closed outer tube 2 and an inner tube 3 composed of a tube body, an upper end plate 1 and a lower end plate 15. The upper end of the tube body is fixed with an annular support 16, and the upper end plate 1 is installed on the ring by fastening screws. A detachable structure is formed on the support 16, and the radio frequency water content analyzer 8 is arranged on the upper end plate 1 of the outer pipe; The other two ports of the tee are respectively connected to the mixed liquid inlet and the mixed liquid outlet of the wellhead pipeline 11. The lower end of the inner pipe 3 is a gas-liquid discharge pipe 19, an...

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Abstract

The invention discloses a method and a device for realizing online measurement for a single-well water content of crude oil in an oil well by virtue of gas-liquid separation. The method comprises the following steps that: 1. a gas-liquid separation device internally provided with an inner tube and an outer tube is installed on a wellhead pipeline, the outer tube and the inner tube are communicated with a mixed liquid inlet and a mixed liquid outlet of the wellhead pipeline respectively, a radiofrequency water content analyser is installed outside the gas-liquid separation device, and a probe of the radiofrequency water content analyser is inserted in the inner tube and located on the lower part of the inner tube; 2. an oil-gas-water three-phase flow flowing in through the mixed liquid inlet flows in the outer tube, and a gas ascends and enters the inner tube from top to bottom, and then is discharged from the wellhead pipeline through the mixed liquid outlet; and 3. the liquid level of an oil-water mixed liquid entering the outer tube descends, the oil-water mixed liquid enters the inner tube and flows through the probe, and the probe is capable of obtaining an accurate instantaneous water content signal, thus eliminating the influence of the gas on measurement accuracy. The device has the beneficial effects of being simple in structure, good in gas-liquid separation effect, stable and reliable in running, accurate in measurement data, and capable of realizing accurate and real-time online measurement for the single-well water content and liquid production capacity.

Description

technical field [0001] The invention belongs to a method and device for realizing on-line measurement of water content in crude oil of a single oil well by using gas-liquid separation. Background technique [0002] At present, the online automatic measurement of the water content of single well crude oil in the oil field is a universal world-class problem, especially for oil wells with large gas production, many water content analyzers based on density method, capacitance method and ray method have not completely overcome the influence of gas. The specific performance is: the existing water cut analyzer has a single product structure, and a cylindrical probe rod is inserted into the wellhead pipeline. The gas and liquid cannot be separated. Therefore, it has not been able to solve the problem of online automatic measurement of water content in crude oil in single well. Contents of the invention [0003] The purpose of the present invention is to solve the problems existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/34E21B47/00
Inventor 朱广升
Owner JINZHOU JINYAN TECH
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