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Method and device for measuring working fluid level of oil well

A measurement device and measurement method technology, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., can solve the problems of difficult identification of gas-liquid interface, etc., and achieve the effect of short measurement time and high measurement accuracy

Inactive Publication Date: 2011-08-10
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to propose a method and device for measuring the resonant acoustic spectrum of the moving liquid surface in an oil well in order to solve the deficiencies in the prior art such as the difficulty in identifying the gas-liquid interface under complex conditions.

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  • Method and device for measuring working fluid level of oil well
  • Method and device for measuring working fluid level of oil well
  • Method and device for measuring working fluid level of oil well

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Embodiment Construction

[0017] figure 1 Shown is the principle diagram of the experimental measurement device for the resonance acoustic spectrum dynamic liquid level measurement of the present invention. The device includes: a cylindrical resonant cavity 10 for storing fluid, and the resonant cavity 10 is made of rigid material, such as glass fiber reinforced plastic, or metal (such as steel, copper, etc.); it is used to excite the resonant cavity 10 to generate transient free vibration A signal generating unit 11, the signal generating unit 11 can be a relay or a ringer; a sensor 12 for receiving the transient acoustic wave signal produced when the resonant cavity 10 is free to vibrate; a signal processing unit connected to the sensor 12 13. The signal processing unit includes a data memory for storing electrical signals from the sensors and processing results.

[0018] figure 1 In the middle cavity 10 is a dynamic or static fluid 14 . Based on the content of the invention, there may be differen...

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Abstract

The invention relates to a method and device for measuring a working fluid level of an oil well. The method comprises the steps of generating a transient mechanical striking force; enabling a resonant cavity with liquid to generate transient free vibration under an effect of the transient mechanical striking force and forming a transient sound field in the resonant cavity; receiving a time domain waveform signal of the transient sound field; and obtaining a resonant acoustic spectrum frequency of the resonant cavity according to the transient time domain waveform signal so as to obtain a depth value of the working fluid level in the resonant cavity. By means of the method and device, disclosed by the invention, the depth value of the working fluid level is obtained through accurate measurement, the recognition difficulty of the obscure working fluid level is solved, and thus the variation of the working fluid level during the production of the oil well, in particular the situation that attachments exist on the surface of the fluid level, can be preferably monitored.

Description

technical field [0001] The invention relates to a resonance acoustic spectrum measurement technology of a dynamic liquid level in an oil well, in particular to a resonance acoustic spectrum transient method and a measurement device suitable for the measurement of a dynamic liquid level in an oil field production well. Background technique [0002] In the process of oilfield development, it is very important to accurately measure the depth of dynamic fluid surface for inspecting the working performance of pumping units and pumps, monitoring and adjusting oil well production. The current oil recovery methods are mainly divided into two categories: one is to rely on the energy of the oil reservoir itself, which is self-spray oil recovery, and the other is to rely on external supplementary energy to complete, which is artificial lift or mechanical oil recovery. At present, there are mainly oil pumping methods. Machine, electric pump, screw pump. In the late stage of oilfield de...

Claims

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Application Information

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IPC IPC(8): E21B47/04
Inventor 丛健生王秀明陈德华车承轩徐德龙田苗
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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