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Diagnostic method for measuring annular working fluid level and working conditions of rod-pumped well by electric parameters

A technology for pumping wells and electricity parameters, which is applied to the measurement of pumping wells in oil fields, and in the field of oil production in oil fields, to achieve the effects of cost reduction, energy saving, efficiency enhancement, reliability and timeliness, and fewer test parameters

Active Publication Date: 2015-02-25
哈尔滨斯特凯峰电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that various instruments and manual cooperation are needed to measure the operating condition parameters of the oil well, the present invention provides a method for measuring the annulus dynamics of the pumping well with electrical parameters that can be detected online in real time during the operation of the oil well. Liquid level and working condition diagnosis method

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  • Diagnostic method for measuring annular working fluid level and working conditions of rod-pumped well by electric parameters
  • Diagnostic method for measuring annular working fluid level and working conditions of rod-pumped well by electric parameters
  • Diagnostic method for measuring annular working fluid level and working conditions of rod-pumped well by electric parameters

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specific Embodiment approach 1

[0040] Specific embodiments one, this embodiment is described a kind of process based on electrical parameters of pumping well annulus dynamic fluid level measurement method is:

[0041]During the normal working process of the pumping unit, the electrical parameters of the pumping well are collected in real time at high speed, and then the net torque of the corresponding pumping unit is obtained through calculation according to the electrical parameters. The data acquisition speed is greater than or equal to 20 times per second. The crank of the oil pump runs to the moment corresponding to the upper dead center and the lower dead center of the pumping unit;

[0042] Adjust the parameters of the pumping well, specifically to control the stroke frequency of the pumping well from the normal operation N to the N after the parameter adjustment 1 , N 1 ≠N and continue to run for a time T, and then return to the stroke times N of normal operation again; the time T is 2-5 minutes;

...

specific Embodiment approach 2

[0063] Specific embodiment 2. This embodiment is a further limitation of the method for measuring the dynamic liquid level in the annulus of pumping wells based on electrical parameters described in the specific embodiment 2. In this embodiment, the method of obtaining the annulus The method of dynamic liquid surface HY is based on the formula

[0064]

[0065] Obtained, wherein: Y represents the mechanical transmission efficiency from the pumping well motor input end to the wellhead suspension point when the number of strokes is N, Known as the torque factor or torque factor, the torque factor or torque factor is the technical parameter of the pumping unit transmission, which generally depends on the geometric size of the pumping unit and the crank angle θ, that is, the torque generated by the unit suspension point load force on the crank, the torque factor or torque factor in the above formula Get P for collection 上下 The process corresponds to the corresponding upstr...

specific Embodiment approach 3

[0066] Specific Embodiment 3. This embodiment is a further limitation of the method for measuring the dynamic liquid level in the annular space of the pumping well based on electrical parameters described in the specific embodiment 2. In this embodiment, the dynamic liquid level in the annular space is obtained by measuring When , it also includes the step of calculating the acceleration a of the suspension point at the wellhead, and then calculating the formula according to the acceleration a:

[0067] HY=HY / (1+a)

[0068] Correct the obtained annulus dynamic fluid level to obtain the final annulus dynamic fluid level HY.

[0069] In this embodiment, acceleration parameters are used to trim the dynamic liquid surface in the annular space, that is, the influence of the acceleration of the dynamic liquid surface in the annular space under the actual working state on the measurement results is considered in the process of measuring the dynamic liquid surface in the annular space...

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Abstract

The invention discloses a diagnostic method for measuring an annular working fluid level and working conditions of a rod-pumped well by electric parameters, relates to the technical field of oil recovery of oil fields, and solves the problem that a traditional measurement of oil well working condition parameters can be realized through the fit of multiple instruments and labors. In a three-phase flow (oil, gas and water) of oil well oil recovery fluid, as the gas influence exists in the test, the online automatic and practical test of the annular working fluid level of the oil recovery well in a scene well mouth is difficult. The gas influence is excluded from data by the weight in the testing process; in the state of the same operation working conditions, the differential treatment is performed for the data to eliminate uncertain factor errors or fixed errors; the correction and the compensation are performed in different operation states; the high-speed data acquisition guarantees the data density, and realizes the data reliability; the upper and lower stroke torque data and time of the rod-pumped well are periodically treated; the upper and lower stroke data of a pumping unit is superposed in operation; and the methods are combined to realize online continuous, automatic and practical diagnosis for measuring the annular working fluid level and the working conditions of the rod-pumped well by the electric parameters on scene.

Description

technical field [0001] The present application relates to the technical field of oil production in oil fields, and in particular to the technical field of pumping well measurement in oil fields. Background technique [0002] For many years, pumping wells in oil fields have been used to measure the dynamic liquid level in the annular space. Acoustic liquid level testers are generally used to measure the dynamic liquid level. Suspended hard cover (dead oil surface), influence of foam section, or inclined well and other factors, it is difficult to accurately measure the dynamic liquid level in the annulus of the pumping well, or the dynamic liquid level cannot be measured; most of the working conditions of the pumping well are diagnosed during operation The load and displacement ground dynamometer is used to realize the measurement, and the type of working condition is judged by the playback curve graph of the measured data. At present, the deformation of the sucker rod is calc...

Claims

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Application Information

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IPC IPC(8): E21B47/047
CPCE21B47/047
Inventor 金凯金奇峰王伟
Owner 哈尔滨斯特凯峰电子有限公司
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