Three-dimensional superposition visual display method for oil well indicator diagram

Abstract

The invention discloses a three-dimensional superposition visual display method for an oil well indicator diagram. The method comprises the following steps: drawing a scatter bubble graph on a rectangular coordinate system; drawing a complete indicator diagram closed curve; an indicator diagram card is formed; constructing a three-dimensional coordinate system; a plurality of indicator diagram cards are drawn in the same three-dimensional coordinate system according to the time sequence, and an indicator diagram three-dimensional superposition visual display area is generated. The method has the advantages that the preprocessed indicator diagram data of the rod-pumped well are superposed according to the time sequence by means of the three-dimensional coordinate system, the gradual change type or sudden change type graph change trend of the indicator diagram can be visually displayed, and the purpose of assisting an engineer in diagnosing the production working condition of the oil well is achieved. Compared with conventional two-dimensional indicator diagram superposition, a time sequence is added, the indicator diagrams can be viewed in an all-dimensional rotating mode in any time period and observed in a multi-angle visualized mode, the influence of graph coverage is avoided, the more the superposed indicator diagrams are, the clearer the change trend is, the change points are accurately positioned, and the application range is wide.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production engineering, and particularly relates to an oil well power indicator. Figure 3 Dimensional overlay visualization method. Background Art

[0002] With the development of digital systems, in the field of oil production, pumping units have realized the continuous collection of key production data such as power diagrams and currents, and the amount of data generated is huge. These data have greatly improved our perception of oilfield production, but also brought about an application problem of how to efficiently and deeply utilize data and enhance the value of data. Through multi-dimensional analysis of oil well power diagrams and prediction of change trends, abnormal working conditions can be grasped in advance and targeted preventive measures can be taken, which is of great guiding significance for production management.

[0003] Chinese patent CN109184669A discloses a centralized visualization display method for dynamic monitoring data of oil well production. By drawing multiple indicator diagrams in the same coordinate system to generate a new superimposed indicator diagram, the working condition change trend of the oil well pump during the period of time can be intuitively seen, and then both the gradual and sudden working conditions can be accurately judged, and the operation of the oil well can be monitored through the newly added indicator diagram area change rate curve over time, the working condition related parameter fluctuation level diagram and the working condition related parameter fluctuation rate diagram. The field engineer can first make a preliminary diagnosis of the working condition of the oil well pump through the oil well working condition diagnosis card, and then combine the comparison of various oil well data curves to accurately judge the working condition of the oil well pump, giving full play to the value of oil well big data, improving work efficiency and reducing the possibility of misjudgment. At the same time, the data are reasonably arranged in the same interface, which is convenient for the field engineer to make timely diagnosis of the oil well working condition. However, the indicator diagram superposition technology used in this method is a two-dimensional superposition, and the graphics coverage phenomenon is serious after superposition, the graphics are complex, the change point cannot be accurately located, and the production trend cannot be accurately judged, which is not suitable for the superposition analysis of multiple power diagrams.

[0004] Chinese patent CN112766301A discloses a method for judging the similarity of the oil production machine indicator diagram. The method first normalizes the coordinates of the original indicator diagram data of the oil production machine after removing the abnormal data, and takes the maximum stroke and the maximum load as the maximum range of the horizontal and vertical axes, maps them to the grid and rounds them to obtain the indicator diagram image; then classifies the indicator diagram image samples according to the similarity of the graphics, takes the sample pairs within the class as the positive sample pairs, and the sample pairs between the classes as the negative sample pairs, and superimposes and draws the two indicator diagrams of the sample pairs to obtain the indicator diagram similarity training set and verification set, and uses deep learning network training and verification to obtain a similarity judgment model; according to the model, the oil production machine fault is judged and detected in real time, and an alarm is issued to notify the on-site personnel when an abnormal working condition occurs. The method can accurately judge the similarity of the graphic trend, reduce false alarms and missed alarms, and has a high generalization performance, which promotes the efficient and reliable management and control of oil production machine equipment. However, the method only compares the indicator diagram with the sample indicator diagram, and can only analyze the sudden change working condition of the indicator diagram for diagnosis, but cannot diagnose the gradual change working condition.

[0005] Tao Liping et al. wrote in the article “Application of dynamometer diagram overlay analysis technology in Wenliu Oilfield” published in Volume 12, Issue 1 of Oil and Gas Well Testing in February 2003: dynamometer diagram analysis software has been developed, which can transmit the measured dynamometer diagram data to a computer, and then process it with the dynamometer diagram analysis software to obtain the dynamometer diagram of each well. In this way, not only can the dynamometer diagrams of the same well at different times be overlaid and compared, but also the dynamometer diagram data can be shared online. However, the overlay analysis still uses two-dimensional overlay, which only overlays and analyzes a small number of dynamometer diagrams. After overlaying more dynamometer diagrams, the overlay is serious and the graphics are complex and difficult to distinguish.

[0006] In summary, the currently disclosed methods for visualizing the superposition of oil well dynamometer diagrams are all two-dimensional superpositions, which are only suitable for superimposing and analyzing a small number of dynamometer diagrams, and comparing dynamometer diagrams with sample dynamometer diagrams to determine sudden changes in working conditions. For superposition of a large number of dynamometer diagrams, there are problems such as serious overlap, inability to accurately locate change points, and difficulty in distinguishing complex graphics, and it is not possible to perform trend diagnosis on gradual conditions. Therefore, it is necessary to comprehensively upgrade and update traditional data analysis methods. Summary of the invention

[0007] In order to solve the above problems, the present invention aims to provide an oil well indicator Figure 3 Dimensional overlay visualization method.

[0008] In order to achieve the above object, the oil well indicator provided by the present invention Figure 3 The dimensional overlay visualization method includes the following steps performed in sequence:

[0009] 1) Using the suspension point displacement as the abscissa and the suspension point load as the ordinate, a rectangular coordinate system is constructed; using a set of suspension point displacement and suspension point load data of a complete stroke collected from the pumping well in real time, a scatter bubble chart is drawn on the rectangular coordinate system;

[0010] 2) Connect two adjacent scattered points in the above-mentioned scatter bubble diagram with a smooth line, thereby drawing a complete closed curve of the indicator diagram, and the color system of the closed curve of the indicator diagram is consistent with the color system of the scatter bubble diagram;

[0011] 3) Fill the closed curve of the dynamometer diagram with color to form a dynamometer diagram card, and the color scheme is consistent with the closed curve of the dynamometer diagram;

[0012] 4) constructing a three-dimensional coordinate system with the suspension point displacement as the horizontal coordinate, the suspension point load as the vertical coordinate, and the time series as the vertical coordinate; the three-dimensional coordinate system conforms to the right-hand rule;

[0013] 5) Use the drawing program to draw multiple indicator diagram cards of different impulses in chronological order in the same three-dimensional coordinate system to generate the indicator diagram. Figure 3 The dynamometer card at the previous moment is in a lighter color, while the dynamometer card at the current moment is in a darker color of the same color system, so that it can show the changing trend of the dynamometer card.

[0014] In step 1), the suspension point is the suspension point of the sucker rod and the hair braid of the pumping unit; the scatter bubble diagram is a diagram composed of scatter points corresponding to different suspension point displacements and suspension point loads, and the size of the bubble is scaled to between 1 and 5;

[0015] Oil well performance indicator provided by the present invention Figure 3 The dimensional overlay visualization display method has the following beneficial effects:

[0016] The present invention uses a three-dimensional coordinate system to superimpose the pre-processed pumping well indicator diagram data in time series. When applied to pumping wells, it can intuitively display the trend of gradual or sudden changes in the indicator diagram, thereby assisting engineers in diagnosing the production conditions of the pumping wells. Compared with the conventional two-dimensional indicator diagram superposition, the time series is added, and the indicator diagram can be viewed in any time period and in all directions. The indicator diagram can be visually observed from multiple angles without being affected by the graphic coverage. The more the indicator diagrams are superimposed, the clearer the change trend is, and the change point is accurately located. It can be used to diagnose sudden conditions such as rod breakage and pipe leakage, and can also be used to diagnose gradual conditions such as wax sticking, pump leakage, and changes in liquid supply capacity. It has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a scatter bubble chart in the present invention.

[0018] Figure 2 It is the closed curve of the dynamometer diagram in the present invention.

[0019] Figure 3 This is the dynamometer card of the present invention.

[0020] Figure 4 It is the three-dimensional coordinate system in the present invention.

[0021] Figure 5 For the present invention, Figure 3 Dimensional overlay visualization display effect diagram.

[0022] Figure 6 For the present invention, Figure 3 Dimensional overlay software is used to draw the effect diagram. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Oil well performance indicator provided by the present invention Figure 3 The dimensional overlay visualization method includes the following steps performed in sequence:

[0025] 1) Use the suspension point displacement as the horizontal coordinate and the suspension point load as the vertical coordinate to construct a rectangular coordinate system; use a set of suspension point displacement and suspension point load data collected from the pumping well in real time for a complete stroke to draw a scatter bubble chart on the rectangular coordinate system, such as Figure 1 As shown;

[0026] The suspension point is the suspension point of the sucker rod and the pumping unit braid; the scatter bubble diagram is a diagram composed of scatter points corresponding to different suspension point displacements and suspension point loads, and the bubble size is generally scaled to between 1-5; in the present invention, the bubble size is 1.

[0027] 2) Connect two adjacent scattered points in the above scattered bubble diagram with a smooth line to draw a complete closed curve of the indicator diagram, such as Figure 2 As shown, the color system of the closed curve of the dynamometer diagram is consistent with the color system of the scattered bubble diagram; the blue color system is used in the present invention.

[0028] 3) Fill the closed curve of the above dynamometer diagram with color to form a dynamometer diagram card, such as Figure 3 As shown, the color scheme is consistent with the closed curve scheme of the indicator diagram;

[0029] 4) Use the suspension point displacement as the horizontal coordinate, the suspension point load as the vertical coordinate, and the time series as the vertical coordinate to construct a three-dimensional coordinate system, such as Figure 4 As shown; the three-dimensional coordinate system conforms to the right-hand rule;

[0030] 5) Use the drawing program to draw multiple indicator diagram cards of different impulses in chronological order in the same three-dimensional coordinate system to generate the indicator diagram. Figure 3 Dimensional overlay visualization display area, such as Figure 5 As shown, the previous dynamometer card and the dynamometer card at previous moments are in lighter colors, and the dynamometer card at the current moment is in a darker color of the same color system, so that it can show the changing trend of the dynamometer, thereby assisting engineers in diagnosing the working conditions of the oil well;

[0031] The inventor superimposed 432 cards of the performance diagram of a certain pumping well collected from July 15 to August 1, 2022 in a three-dimensional coordinate system, as shown in FIG. Figure 6 As shown in the figure, engineers found that the wax deposition trend in the wellbore was significantly aggravated, so they promptly adopted the hot washing and wax removal method to treat the wellbore and avoid the problem of wax stuck in the pump inspection.

[0032] The visual display area can be rotated at any angle along the X-axis (horizontal coordinate) and the Y-axis (vertical coordinate), and the number of dynamometer diagram cards can be increased or decreased along the Z-axis (vertical coordinate).

Claims

1. A method for three-dimensional overlay visualization of oil well performance diagrams, characterized in that: The oil well performance diagram three-dimensional superposition visualization display method comprises the following steps performed in sequence: 1) Using the suspension point displacement as the abscissa and the suspension point load as the ordinate, a rectangular coordinate system is constructed; using a set of suspension point displacement and suspension point load data of a complete stroke collected from the pumping well in real time, a scattered bubble chart is drawn on the rectangular coordinate system; 2) Connect two adjacent scattered points in the above-mentioned scatter bubble diagram with a smooth line, thereby drawing a complete closed curve of the indicator diagram, and the color system of the closed curve of the indicator diagram is consistent with the color system of the scatter bubble diagram; 3) Fill the closed curve of the dynamometer diagram with color to form a dynamometer diagram card, and the color scheme is consistent with the closed curve of the dynamometer diagram; 4) constructing a three-dimensional coordinate system with the suspension point displacement as the horizontal coordinate, the suspension point load as the vertical coordinate, and the time series as the vertical coordinate; the three-dimensional coordinate system conforms to the right-hand rule; 5) Using a drawing program, multiple dynamometer cards of different impulses are plotted in chronological order in the same three-dimensional coordinate system to generate a three-dimensional overlay visualization display area for the dynamometer diagram, in which the previous dynamometer diagram card and the dynamometer diagram cards at previous moments are in lighter colors, and the dynamometer diagram card at the current moment is in a darker color of the same color system, so that it can show the changing trend of the dynamometer diagram.

2. The three-dimensional superposition visualization display method of oil well performance diagram according to claim 1 is characterized by: In step 1), the suspension point is the suspension point between the sucker rod and the oil pumping unit braid; the scatter bubble diagram is a diagram composed of scatter points corresponding to different suspension point displacements and suspension point loads, and the size of the bubble is scaled to between 1-5.

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