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Soft measuring method of dynamic liquid level under sucker rod oil well

A technology for pumping wells and rod pumps, which is applied in the field of downhole dynamic liquid level soft measurement of rod pump pumping wells, and can solve problems such as high labor intensity, potential safety hazards, and affecting normal production

Active Publication Date: 2015-07-15
NORTHEASTERN UNIV LIAONING
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some deficiencies in the echo method to detect the dynamic liquid level in the well. One is that the measuring instrument is installed at the wellhead, which affects normal production and has certain safety hazards; the other is that the labor intensity is relatively high and the production cost is high.

Method used

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  • Soft measuring method of dynamic liquid level under sucker rod oil well
  • Soft measuring method of dynamic liquid level under sucker rod oil well
  • Soft measuring method of dynamic liquid level under sucker rod oil well

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Embodiment Construction

[0022] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] This embodiment is to apply the downhole dynamic liquid level soft measurement method of the rod pump oil well to an oil field. The dynamic liquid level soft measurement system adopted in this embodiment includes a pressure gauge, a dynamometer acquisition instrument, a tipping bucket meter, Wireless Zigbee transmission module, Ethernet industrial computer and dynamic liquid level computer, pressure gauge is used to measure wellhead casing pressure of pumping wells with rod pumps, dynamometer acquisition instrument is used to collect dynamometer data of pumping units, and tipping bucket gauge is used to measure The liquid production rate of rod pump oil wells, the Ethernet industrial computer is used to receive the data collected by the pressure gauge, the dynamometer acquisition instrument and the tipping bucket meter, and the dy...

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Abstract

A soft measuring method of dynamic liquid level under a sucker rod oil well includes the steps of collecting the dynamic liquid level data of the sucker rod oil well, eliminating outliers of the collected data of the sucker rod oil well; calculating mean load in upstroke and downstroke and the pump efficiency of the pumping unit; subjecting the mean load of upstroke and downstroke, the surface casing pressure of the sucker rod oil well, the daily fluid output of the sucker rod oil well, the pump efficiency of the pumping unit and the depth of the pump under the sucker rod oil well to principal component analysis and transformation to obtain principal components feature vectors of the dynamic liquid level under the sucker rod oil well; and building forecasting functions of the dynamic liquid level based on vector progression so as to forecast the dynamic liquid level and obtain the soft measuring results of the dynamic liquid level under the sucker rod oil well. The soft measuring method of dynamic liquid level under the sucker rod oil well is capable of measuring on-line continuously with low measuring costs and high safety, saving field data automatically without manual spot operations, and being free of manual records to reduce loss of data and recording failure percentage.

Description

technical field [0001] The invention belongs to the technical field of soft measurement detection, and in particular relates to a soft measurement method for downhole dynamic liquid level of a rod pump oil well. Background technique [0002] In the process of oil extraction, due to various reasons, some oil wells have intermittent oil production and low efficiency of insufficient liquid supply. The uninterrupted extraction of these oil wells will inevitably cause a large waste of energy. It is the key to improve the production efficiency of oil wells to realize the real-time monitoring of downhole dynamic liquid level, grasp the downhole production status, and adjust the pumping time and swabbing parameters in time. At present, the dynamic liquid level measurement method commonly used in oilfield production mainly uses sound waves to propagate downward along the sucker rod, and will reflect when encountering the dynamic liquid level downhole, and detect the dynamic liquid le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/047
Inventor 高宪文王明顺刘占广侯延彬李峰王猛徐爽刘雨
Owner NORTHEASTERN UNIV LIAONING
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