Downhole ray type water content monitor

A monitor and ray technology, applied in the field of monitors, can solve problems such as the inability to eliminate the influence of gas content and the inability to apply water content monitoring in the horizontal section of horizontal wells, and achieve the effect of overcoming the small measurement range and eliminating errors

Active Publication Date: 2015-02-25
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the water cut monitoring instrument in the prior art cannot eliminate the influence of gas content on the water cut measurement and cannot be applied to the water cut monitoring of the horizontal section of the horizontal well

Method used

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  • Downhole ray type water content monitor
  • Downhole ray type water content monitor
  • Downhole ray type water content monitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In order to overcome the problem that the water cut monitoring instrument in the prior art cannot eliminate the influence of gas content on the water cut measurement and cannot be applied to the water cut monitoring of the horizontal section of the horizontal well, this embodiment provides a method such as figure 1 and figure 2 The downhole ray-type water content monitor shown includes a housing 9, the upper and lower ends of the housing 9 are respectively provided with an upper joint 1 and a lower joint 7, and a central flow channel 2 runs through the upper and lower sides of the housing 9. A radioactive source mount 12, a radioactive source 11, a transmission detector 3, a scattering detector 13, a circuit board 4 and a battery pack 5 are arranged between the casing 9 and the central flow channel 2, and the radioactive source mount 12 is placed In the middle part of the casing 9, the radiation source 11 is installed on the radiation source mounting base 12 and is arr...

Embodiment 2

[0029] On the basis of Example 1, this embodiment further explains the subsection water detection test process of the downhole ray-type water cut monitor of the present invention in a horizontal well. In this embodiment, the radioactive source 11 of the downhole ray-type water cut monitor The inclination angle is 35°, and the distance between the radiation source 11 and the transmission detector 3 is 65 cm.

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Abstract

The invention particularly provides a downhole ray type water content monitor which comprises a shell. The upper end and the lower end of the shell are provided with an upper connector and a lower connector respectively. A central passageway vertically penetrates through the shell. A radioactive source installation base, a radioactive source, a transmission detector, a scattering detector, a circuit board and a battery pack are arranged between the shell and the central passageway. The radioactive source is installed on the radioactive source installation base obliquely. The transmission detector is arranged on a light ray circuit of the radioactive source and located on the side opposite to the radioactive source. The scattering detector is arranged above the radioactive source, and the included angle between the scattering detector and the light ray circuit of the radioactive source is 90 degrees. The battery pack is installed at the lower end of the shell. The circuit board is arranged between the scattering detector and the battery pack. The radioactive source and the circuit board are electrically connected with the battery pack. By means of the downhole ray type water content monitor, errors which are caused by contained water to water content measurement are eliminated, the water contents of all layer sections of a tubular column multi-section fracturing horizontal well are monitored and rapidly measured, the water content measuring cycle is shortened, and the water content measuring accuracy is improved.

Description

technical field [0001] The invention relates to a monitoring instrument, in particular to a downhole ray-type water content monitoring instrument. Background technique [0002] Oil well water cut monitoring is an important task in oil well production. At present, packers are mostly used to find water in horizontal wells. The manual sampling measurement method and the wellhead online measurement method measure the water content of a layer in a period of time. Each section has to be independently produced for more than 10 days, and the test cycle is too long, which seriously affects the on-site production progress. [0003] In addition, there is a related water content monitor, mainly including capacitance method, short wave method, microwave method (or radio frequency method), vibration density meter method and so on. However, these technologies have certain limitations, and the above-mentioned types of instruments are all contact measurement. Due to the strong corrosion of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08
CPCE21B49/08
Inventor 朱洪征吕亿明黄伟曾亚勤甘庆明王百李亚洲牛彩云李大建崔文昊常莉静罗有刚
Owner PETROCHINA CO LTD
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