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Pumping unit indicator diagram acquisition method based on polynomial fitting

A polynomial fitting and acquisition method technology, applied in the field of pumping unit dynamometer chart acquisition based on polynomial fitting, can solve the problem of difficult to meet the requirements of the accuracy of the dynamometer data, and determine the wellhead oil production that affects the wellhead condition of big data, etc. problems, to improve stability and accuracy, improve efficiency, and achieve good results

Active Publication Date: 2020-09-15
傲拓科技股份有限公司
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Problems solved by technology

[0002] The traditional smoothing method to collect displacement data is difficult to meet the accuracy requirements of dynamometer data in the environment of large disturbance pumping units, and will produce a lot of invalid dynamometer data, which will affect the judgment of wellhead status and oil production rate of wellhead by big data. calculation, so it is necessary to improve the efficiency of power map data collection

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  • Pumping unit indicator diagram acquisition method based on polynomial fitting
  • Pumping unit indicator diagram acquisition method based on polynomial fitting
  • Pumping unit indicator diagram acquisition method based on polynomial fitting

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] The present invention proposes a polynomial fitting-based acquisition method for the dynamometer diagram of a pumping unit, as an optimization method for the dynamometer diagram of a pumping unit, by performing least squares polynomial fitting on the original displacement data curve of the oil rod collected by the sensor , to optimize the displacement curve of the dynamometer.

[0027] Such as figure 1 As shown, the polynomial fitting-based method for collecting the dynamometer diagram of the pumping unit in the embodimen...

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Abstract

The invention provides a pumping unit indicator diagram acquisition method based on polynomial fitting. The pumping unit indicator diagram acquisition method comprises the following steps: a wellheadcontroller RTU acquires N point set load displacement original data at fixed intervals according to a stroke period, and recombines indicator diagram data (Si, Fi) of dead points below the original data; data enhancement is carried out on the recombined displacement data points, and the data points are expanded to (1 + k) N point data sets Snew; n-order polynomial fitting is performed on the data,and polynomial coefficients a0, a1... an are calculated to obtain a Y (xi) polynomial function; and xi substitution calculation is carried out on the obtained function, so as to obtain a new displacement data set, and enhanced data is utilized and removed, and then new N-point indicator diagram data is formed. Through the polynomial curve fitting method, the pumping unit indicator diagram acquisition method is simple and efficient, and the stability and accuracy of displacement data acquisition are well improved.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a polynomial fitting-based acquisition method for an indicator diagram of an oil pumping unit. Background technique [0002] The traditional smoothing method to collect displacement data is difficult to meet the accuracy requirements of dynamometer data in the environment of large disturbance pumping units, and will produce a lot of invalid dynamometer data, which will affect the judgment of wellhead status and oil production rate of wellhead by big data. Therefore, it is necessary to improve the efficiency of power map data collection. Contents of the invention [0003] The aim of the present invention is to solve at least one of said technical drawbacks. [0004] For this reason, the object of the present invention is to propose a kind of method for collecting the indicator diagram of pumping unit based on polynomial fitting. [0005] In order to achieve the above objec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06Q50/02
CPCG06F17/18G06Q50/02Y02P90/02
Inventor 李广勇陈正刚张春银杨万应姚文广胡艳萍
Owner 傲拓科技股份有限公司
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