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

An oil pumping well and rod pump technology is applied in the field of downhole dynamic liquid level soft measurement of rod pump oil wells, and can solve problems such as hidden safety hazards, high production costs, and high labor intensity.

Active Publication Date: 2013-04-24
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
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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 with reference to the accompanying drawings.

[0023] This embodiment is to apply the downhole dynamic liquid level soft measurement method of a rod pump pumping well to an oil field. The dynamic liquid level soft measurement system adopted in this embodiment includes a pressure gauge, an indicator diagram collector, a tipping bucket meter, Wireless Zigbee transmission module, Ethernet industrial computer and dynamic level computer, pressure gauge is used to measure the wellhead casing pressure of rod pumping wells, indicator diagram collector is used to collect indicator diagram data of pumping unit, and tipping bucket meter is used for measurement The fluid production of rod pumping wells, the Ethernet industrial computer is used to receive the data collected by the pressure gauge, the indicator diagram collector and the tipping bucket meter, and the dynamic level computer is used to re...

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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 specifically relates to a method for soft measurement of downhole dynamic liquid level in a rod pumping well. Background technique [0002] In the process of oil exploitation, due to various reasons, some oil wells have intermittent oil production and insufficient fluid supply. In this part of oil wells, continuous exploitation will inevitably result in greater energy waste. Realizing the real-time monitoring of the downhole dynamic liquid level and mastering the downhole production status, so as to adjust the pumping time and pumping parameters in time, is the key to improving the production efficiency of oil wells. At present, the commonly used dynamic liquid level measurement methods in oilfield production mainly use sound waves to propagate down the sucker rod, and reflect the dynamic liquid level downhole. The dynamic liquid level is detected by detecting the emitted wave a...

Claims

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Application Information

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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
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