A method for displaying well logging images, an imaging device and an imaging method

Abstract

The present invention provides a method for displaying a well logging image, an imaging device and an imaging method, the display method comprising: step a, determining the display mode and main scale interval of the well logging image; step b, performing out-of-bounds processing on the part of the well logging data outside the main scale interval, and drawing and displaying the out-of-bounds part of the well logging data at a second scale; step c, determining the value of the second scale; step d, calculating the endpoint value of the second scale scale interval according to the endpoint value of the main scale interval and the value of the second scale; step e, generating coordinate points according to the data values ​​of the well logging data and drawing and displaying the well logging image according to the coordinate points. The display method of the present invention can effectively solve the problem that when a well logging image with a large numerical variation range is displayed at a single scale, the image is large and cannot be fully displayed in a limited display area. The imaging device and imaging method of the present invention both have the technical effects of the display method.

Description

Technical Field

[0001] The present invention relates to the technical field of well logging image processing, and in particular to a display method, an imaging device and an imaging method of a well logging image. Background Art

[0002] Oil logging curves are the main means of intuitively analyzing formation lithology, physical properties, and fluid properties. The graphical display of logging curves allows relevant personnel to quickly browse curve data, clarify curve characteristics, and then intuitively determine specific lithology, strata, etc. For actual large-scale measurement well sections, the lithology and well diameter characteristics from top to bottom are different, which will cause the curve to vary greatly from top to bottom. However, at present, a single logging curve can only be displayed in the entire well section with a unified scale. In order to display the single curve value with a large amplitude change in the entire well section on the screen, the local curve amplitude will be almost the same, which seriously affects the interpreter's reasonable understanding of the curve characteristics and the accurate judgment of the lithology, reservoir, etc.

[0003] At present, the display method for logging data images with a large range of numerical changes is to repeatedly display two curves, give different graduation values ​​to each curve, and truncate the data that exceeds the scale range. However, this method is cumbersome, inefficient, and the drawing display is not beautiful. Moreover, for curves with large numerical changes, this method is far from meeting the display requirements.

[0004] Based on the above situation, there is an urgent need for a more flexible and reasonable logging data drawing and display method that can not only display the logging curve information of the entire well section, but also clearly and intuitively reflect the lithology and geological characteristics, providing work convenience for relevant personnel. Summary of the invention

[0005] In response to the above-mentioned problems in the prior art, the present application proposes a display method, an imaging device and an imaging method for logging images, which can effectively solve the problem that logging images with a large numerical variation range cannot fully display curve characteristics when displayed at a single scale.

[0006] A method for displaying a well logging image of the present invention comprises:

[0007] Step a: Determine the display mode and main scale interval of the logging image [X L , X R ];

[0008] Step b, performing out-of-bounds processing on the portion of the well logging data outside the main scale interval, and the well logging image corresponding to the out-of-bounds portion of the well logging data is located in the second scale interval and is drawn and displayed at the second scale;

[0009] Step c, determining the value of the second ratio;

[0010] Step d: Calculate the endpoint value X of the second scale interval according to the endpoint value of the main scale interval, the value of the second scale, and the crossing of the logging data. Lo and / or X Ro ;

[0011] Step e: within the corresponding scale interval, coordinate points are generated according to the data values ​​of the logging data, and a logging image is drawn and displayed according to the coordinate points.

[0012] In one embodiment, in step a, the display mode includes linear scale display and logarithmic scale display; wherein the logarithmic scale of the logarithmic scale display is based on 10.

[0013] In one embodiment, in step b, the out-of-bounds processing includes determining the position of the second proportional scale interval relative to the main scale interval according to the size relationship between the data value of the out-of-bounds portion and the endpoint value of the main scale interval; wherein,

[0014] If the data values ​​of the out-of-bounds part are all less than the left endpoint value X of the main scale interval L , then the second scale interval [X L o,X L ];

[0015] If the data values ​​of the out-of-bounds part are all greater than the right endpoint value X of the main scale interval R , then the second scale interval [X R , X R o];

[0016] If the data value of the out-of-bounds part is smaller than X L There are also parts greater than X R The second scale interval [X L o,X L ] and [X R , X R o].

[0017] In one embodiment, in step b, the well logging image corresponding to the second scale interval is different from the well logging image corresponding to the main scale interval in color and / or line type.

[0018] In one embodiment, in step c, the value of the second ratio is an integer greater than 0.

[0019] In one embodiment, in step d, the endpoint value of the second scale interval is calculated in the following manner:

[0020] For linear scale displays:

[0021] XLo =(n+1)X L -nX R , X Ro =(n+1)X R -nX L ;

[0022] For logarithmic scale display:

[0023]

[0024] Wherein, n is the value of the second ratio.

[0025] In one embodiment, in step e, when the logging image is displayed, the display area corresponding to the second scale interval and the main scale interval occupies the same area and completely overlaps.

[0026] An imaging device of the present invention, which applies the above display method, comprises:

[0027] A data reading module, the data reading module is used to read the well logging data of the well logging image to be displayed;

[0028] Control module; the control module is used to input control instructions, and the control module can calculate and generate coordinate points of the logging image according to the control instructions and the logging data and draw the logging image according to the coordinate points;

[0029] An image display module is used to display the well logging image drawn by the control module.

[0030] An imaging method of the present invention, applied to the above imaging device, comprises:

[0031] Step 1: read the logging data in the memory through the data reading module and pass it to the control module;

[0032] Step 2: inputting a control instruction to the control module, and the control module determines a second scale interval according to the control instruction and the data value of the logging data and calculates the endpoint value of the second scale interval;

[0033] Step 3: The control module performs calculation processing on the logging data, generates coordinate points in the corresponding interval according to the calculation results, and draws a logging image according to the coordinate points;

[0034] Step 4: The image display module receives the data of the well logging image generated by the control module and displays the well logging image on a display screen.

[0035] In one embodiment, the control instruction includes selecting a display mode, inputting endpoint values ​​of a main scale interval and a value of a second ratio.

[0036] In one embodiment, the control instruction further includes selecting the display color and line type of the logging image corresponding to the main scale interval and the second proportional scale interval respectively.

[0037] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved.

[0038] The present invention provides a method for displaying a well logging image, an imaging device and an imaging method, which have at least the following beneficial effects compared with the prior art:

[0039] The display method of the present invention applies two different display ratios in the same logging image. By setting the second ratio, the image with a very large data variation range does not need to be truncated to meet the display requirements, and the logging curve image is completely retained. At the same time, by overlapping the regions of different ratio intervals, the image size is further reduced without affecting the expression of curve characteristics at all; the function of displaying the logging curve information of the entire well section in a limited display area is realized, which clearly and intuitively reflects the lithology and geological characteristics, and provides work convenience for relevant personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0041] Figure 1 A flow chart showing a display method of the present invention is shown;

[0042] Figure 2 The well logging curve diagram corresponding to the embodiment 1 of the present invention is shown;

[0043] Figure 3 The well logging curve diagram corresponding to the embodiment 2 of the present invention is shown;

[0044] Figure 4 The well logging curve diagram corresponding to the embodiment 3 of the present invention is shown;

[0045] Figure 5 A schematic structural diagram of the imaging device of the present invention is shown;

[0046] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0047] Reference numerals:

[0048] 1-data reading module, 2-control module, 3-image display module. DETAILED DESCRIPTION

[0049] The present invention will be further described below based on the logging data of an example well obtained by actual well logging and in conjunction with the accompanying drawings.

[0050] Example 1

[0051] This embodiment mainly focuses on the acoustic wave time difference curve in the logging image. According to the logging data, the numerical range of the acoustic wave time difference is 110.8-159.0 μs / ft.

[0052] As shown in the attached picture Figure 1 As shown, a method for displaying a well logging image of the present invention comprises:

[0053] Step a: Determine that the display mode of the acoustic time difference curve is linear scale display, and its main scale interval is [150, 50], that is, X L =150,X R =50;

[0054] Step b: According to the range of the acoustic time difference value of 110.8-159.0 μs / ft, the main scale interval is determined to be [150, 50], and the value of the acoustic time difference outside the main scale interval is less than the left endpoint value X of the main scale interval. L , so the second scale interval [X Lo , 150], the second scale interval is located on the left side of the main scale interval;

[0055] Step c, determining that the value of the second ratio is 1;

[0056] Step d: According to the endpoint value X of the main scale interval L =150, X R =50, the value of the second scale n=1, the display mode is linear scale display, calculate the endpoint value X of the second scale interval Lo ;

[0057] According to the calculation formula: X Lo =(n+1)X L -nX R ;

[0058] Calculate X Lo =(1+1)*150-50=250, so the second scale interval is [250, 150];

[0059] Step e: within the corresponding scale interval, generate coordinate points according to the data value of the acoustic time difference data and draw and display them according to the coordinate points as shown in the attached figure Figure 2 In the acoustic time difference curve shown in the figure, the portion of the curve corresponding to the main scale interval is displayed in the original proportion, and the portion corresponding to the second scale interval is displayed in the second proportion.

[0060] Specifically, the value n of the second scale indicates that the interval length of the second scale interval is n times the interval length of the main scale interval; for linear scale display, that is, |X L -X Lo |=n*|X R -X L |=|X Ro -X R |; For logarithmic scale display, that is,

[0061] The basic basis for determining the value of the second ratio is that the second ratio scale interval calculated based on the determined second ratio value combined with the endpoint value of the main scale interval should be able to completely cover the corresponding part of the logging data value outside the main scale interval.

[0062] It should be noted that the vertical scale on the logging image usually indicates the well depth, and the horizontal scale is the data value of the corresponding type of data in the logging data. In this embodiment, the reason why the left endpoint value of the main scale interval and the second proportional scale interval is numerically greater than the right endpoint value is that the larger the number of the acoustic time difference data in this embodiment, the smaller the acoustic wave velocity it represents.

[0063] In addition, in theory, in the sound wave time difference curve diagram, according to the calculation results, the image area corresponding to the second proportional scale interval should be located on the left side of the image area corresponding to the main scale interval, and such a sound wave time difference curve diagram is a complete curve diagram. However, in this way, the left and right widths of the entire image are the sum of the width of the main scale interval and the width of the second proportional scale interval. The width is relatively large, which is not conducive to display and has certain requirements on the screen size of the display screen. Therefore, in order to fully display the sound wave time difference curve in a limited display area and fully show its curve characteristics, the image area corresponding to the second proportional scale interval is made to be the same size as the image area corresponding to the main scale interval and the two areas are completely overlapped, as shown in the attached figure Figure 2 As shown, this reduces the left and right widths of the image display area, which is conducive to the complete display of the logging curve image.

[0064] from Figure 2 It can be seen from the acoustic time difference curve that the left part of the curve corresponding to the main scale interval is truncated. The truncated part should be located in the second scale interval on the left side of the main scale interval, but through the overlap of the corresponding areas of the two intervals, the truncated part is equivalent to being moved to the right side of the overlapping area through translation. From the image, the acoustic time difference curve seems discontinuous, but in fact, the integrity of the curve has not been damaged, and the curve characteristics have not been changed. Only part of the curve has been intercepted and translated, so the data it represents is continuous, which does not affect the interpreter's reasonable understanding of the curve characteristics and the accurate judgment of lithology, reservoirs, etc.

[0065] At the same time, the data processing process of the entire display method is realized by software on the computer. According to the actual situation, the personnel can set the specific value of the main scale interval, the value of the second scale, and select the color and line type of the image display corresponding to different intervals through the software. Among them, the color and line type of the logging image corresponding to different intervals can be the same or different, depending on the actual situation.

[0066] Example 2

[0067] This embodiment mainly focuses on the 4-meter gradient resistivity curve in the logging image. According to the logging data, the value range of the 4-meter gradient resistivity is 9.4-117.2Ω·m.

[0068] As shown in the attached picture Figure 1 As shown, a method for displaying a well logging image of the present invention comprises:

[0069] Step a: Determine that the display mode of the 4-meter gradient resistivity curve is linear scale display, and its main scale interval is [0, 30], that is, X L =0,X R =30;

[0070] Step b: According to the numerical range of the 4-meter gradient resistivity being 9.4-117.2Ω·m, the main scale interval is determined to be [0, 30], and the numerical value of the 4-meter gradient resistivity outside the main scale interval is greater than the right endpoint value X of the main scale interval. R , so the second scale interval [30, X R o], the second scale interval is located to the right of the main scale interval;

[0071] Step c, determining that the value of the second ratio is 4;

[0072] Step d: According to the endpoint value X of the main scale interval L =0, X R =30, the value of the second scale n=4, the display mode is linear scale display, calculate the endpoint value X of the second scale interval Ro ;

[0073] According to the calculation formula: X Ro =(n+1)X R -nX L ;

[0074] Calculate X Ro =(4+1)*30-4*0=150, so the second scale interval is [30, 150];

[0075] Step e: within the corresponding scale interval, generate coordinate points according to the data value of the 4-meter gradient resistivity data and draw and display them according to the coordinate points as shown in the attached figure. Figure 3In the 4-meter gradient resistivity curve shown in the figure, the portion of the curve corresponding to the main scale interval is displayed using the original proportion, and the portion corresponding to the second scale interval is displayed using the second proportion.

[0076] Specifically, the value n of the second scale indicates that the interval length of the second scale interval is n times the interval length of the main scale interval; for linear scale display, that is, |X L -X Lo |=n*|X R -X L |=|X Ro -X R |; For logarithmic scale display, that is,

[0077] The basic basis for determining the value of the second ratio is that the second ratio scale interval calculated based on the determined second ratio value combined with the endpoint value of the main scale interval should be able to completely cover the corresponding part of the logging data value outside the main scale interval.

[0078] It should be noted that the vertical scale on the logging image usually represents the well depth, while the horizontal scale is the data value of the corresponding type of data in the logging data.

[0079] In addition, in theory, in the 4-meter gradient resistivity curve, according to the calculation results, the image area corresponding to the second scale interval should be located on the right side of the image area corresponding to the main scale interval, and such a 4-meter gradient resistivity curve is a complete curve. However, in this way, the left and right widths of the entire image are the sum of the width of the main scale interval and the width of the second scale interval. The width is relatively large, which is not conducive to display and has certain requirements on the screen size of the display. Therefore, in order to fully display the 4-meter gradient resistivity curve in a limited display area and fully display its curve characteristics, the image area corresponding to the second scale interval is made the same size as the image area corresponding to the main scale interval and the two areas are completely overlapped, as shown in the attached figure Figure 3 As shown, this reduces the left and right widths of the image display area, which is conducive to the complete display of the logging curve image.

[0080] from Figure 3It can be seen from the 4-meter gradient resistivity curve that the right part of the curve corresponding to the main scale interval (solid line part in the figure) is truncated. The truncated part should be located in the second scale interval on the right side of the main scale interval, but through the overlap of the corresponding areas of the two intervals, the truncated part is equivalent to being moved to the left side of the overlapping area (dashed line part in the figure) by translation. From the image, the 4-meter gradient resistivity curve seems discontinuous, but in fact, the integrity of the curve has not been damaged, and the curve characteristics have not been changed. Only part of the curve has been intercepted and translated, so the data it represents is continuous, which does not affect the interpreter's reasonable understanding of the curve characteristics and the accurate judgment of lithology, reservoirs, etc.

[0081] At the same time, the data processing process of the entire display method is implemented on a computer through software. According to the actual situation, the personnel can set the specific value of the main scale interval, the value of the second scale, and select the color and line type of the image display corresponding to different intervals through the software. Among them, the color and line type of the logging image corresponding to different intervals can be the same or different, depending on the actual situation. Among them, the color and line type of the logging image corresponding to different intervals can be the same or different, depending on the actual situation.

[0082] Example 3

[0083] This embodiment mainly focuses on the deep lateral resistivity curve in the logging image. According to the logging data, the value range of the deep lateral resistivity is 6.0-2407.9Ω·m.

[0084] As shown in the attached picture Figure 1 As shown, a method for displaying a well logging image of the present invention comprises:

[0085] Step a: Determine that the display mode of the deep lateral resistivity curve is logarithmic scale display, and its main scale interval is [10, 1000], that is, X L =10,X R =1000;

[0086] Step b: According to the value range of deep lateral resistivity being 6.0-2407.9Ω·m and the main scale interval being determined to be [10, 1000], the value of deep lateral resistivity outside the main scale interval is smaller than the left endpoint value X of the main scale interval. L The part is also greater than the right endpoint value X of the main scale interval R Therefore, the second scale interval [X Lo , 10] and [1000, X Ro ], the second scale interval is located on the left and right sides of the main scale interval respectively;

[0087] Step c, determining that the value of the second ratio is 1;

[0088] Step d: According to the endpoint value X of the main scale interval L =10, X R = 1000, the value of the second scale n = 1, the display mode is logarithmic scale display, calculate the endpoint value of the second scale interval and X Lo With X Ro ;

[0089] According to the calculation formula:

[0090] Calculate

[0091] Therefore, the second scale interval is [0.1, 10] and [1000, 100000];

[0092] Step e: within the corresponding scale interval, generate coordinate points according to the data values ​​of the deep lateral resistivity data and draw and display them according to the coordinate points as shown in the attached figure. Figure 4 In the deep lateral resistivity curve shown in the figure, the portion of the curve corresponding to the main scale interval is displayed using the original ratio, and the portion corresponding to the second scale interval is displayed using the second ratio.

[0093] Specifically, the value n of the second scale indicates that the interval length of the second scale interval is n times the interval length of the main scale interval; for linear scale display, that is, |X L -X Lo |=n*|X R -X L |=|X Ro -X R |; For logarithmic scale display, that is,

[0094] The basic basis for determining the value of the second ratio is that the second ratio scale interval calculated based on the determined second ratio value combined with the endpoint value of the main scale interval should be able to completely cover the corresponding part of the logging data value outside the main scale interval.

[0095] It should be noted that the vertical scale on the logging image usually represents the well depth, while the horizontal scale is the data value of the corresponding type of data in the logging data.

[0096] In addition, in theory, in the deep lateral resistivity curve, according to the calculation results, the two image areas corresponding to the second scale interval should be located on the left and right sides of the image area corresponding to the main scale interval, respectively, so that the deep lateral resistivity curve is a complete curve. However, in this way, the left and right widths of the entire image are the sum of the width of the main scale interval and the width of the second scale interval. The width is relatively large, which is not conducive to display and has certain requirements on the screen size of the display. Therefore, in order to fully display the deep lateral resistivity curve in a limited display area and fully display its curve characteristics, the two image areas corresponding to the second scale interval are made to be the same size as the image area corresponding to the main scale interval and the three areas are completely overlapped, as shown in the attached figure Figure 4 As shown, this reduces the left and right widths of the image display area, which is conducive to the complete display of the logging curve image.

[0097] from Figure 4 It can be seen from the deep lateral resistivity curve shown that the curve corresponding to the main scale interval (solid line part in the figure) has truncated parts on both sides. The truncated parts should be located in the second scale interval on the left and right sides of the main scale interval, but through the overlap of the three areas, the truncated parts are equivalent to being moved to both sides of the overlapping area through translation (dashed line part in the figure). From the image, the deep lateral resistivity curve seems discontinuous, but in fact, the integrity of the curve has not been destroyed, and the curve characteristics have not been changed. Only part of the curve position has been intercepted and translated, so the data it represents is continuous, which does not affect the interpreter's reasonable understanding of the curve characteristics and the accurate judgment of lithology, reservoirs, etc.

[0098] At the same time, the data processing process of the entire display method is realized by software on the computer. According to the actual situation, the personnel can set the specific value of the main scale interval, the value of the second scale, and select the color and line type of the image display corresponding to different intervals through the software. Among them, the color and line type of the logging image corresponding to different intervals can be the same or different, depending on the actual situation.

[0099] It should be further explained that when the display method of the present invention is actually applied, the different types of logging data curves of Examples 1 to 3 are processed and drawn at the same time. Because the actual logging data contains various types of data, when the computer software is used for data processing, different types of logging data are input and processed together, but the subsequent logging images can be selectively displayed and switched according to the control of personnel.

[0100] Example 4

[0101] As shown in the attached picture Figure 5 As shown, an imaging device of the present invention, which applies the display method in the above embodiment, comprises:

[0102] A data reading module 1, which is used to read the well logging data of the well logging image to be displayed;

[0103] Control module 2; control module 2 is used to input control instructions, and control module 2 can calculate and generate the coordinate points of the logging image according to the control instructions and the logging data and draw the logging image according to the coordinate points;

[0104] The image display module 3 is used to display the well logging image drawn by the control module 2.

[0105] Specifically, the imaging device as a whole is similar to a computer, and each module includes necessary hardware and software parts. Among them, the data reading module 1 has a data transmission interface to read the logging data; the control module 2 has both control function and data processing function. The control function can realize the input and control of relevant data and parameters by the operator, and the data processing function can realize the calculation and processing of the logging data read by the data reading module according to the input relevant data and parameters, and convert the logging data into each coordinate point and finally form the image data of the logging curve through the coordinate points; the image display module 3 includes a display screen, which can display the image data of the logging curve in the form of an image.

[0106] Example 5

[0107] An imaging method of the present invention, which is applied to the imaging device in the above embodiment, comprises:

[0108] Step 1: read the logging data in the memory through the data reading module and pass it to the control module;

[0109] Step 2: input control instructions to the control module, the control instructions include selecting the display mode of the logging image, inputting the endpoint value of the main scale interval and the value of the second scale, selecting the display color and line type of the logging image corresponding to the main scale interval and the second scale interval respectively, and the control module determines the second scale interval according to the control instructions and the data value of the logging data and calculates the endpoint value of the second scale interval;

[0110] Step 3: The control module performs calculation processing on the logging data. The control module generates coordinate points in the corresponding interval according to the calculation results and draws a logging image according to the coordinate points;

[0111] Step 4: The image display module receives the data of the well logging image generated by the control module and displays the well logging image on the display screen.

[0112] Specifically, the logging data displayed on the imaging device by the imaging method of this embodiment is shown in the attached figure. Figures 2 to 4 shown.

[0113] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0114] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A method for displaying a well logging image, characterized in that: include: Step a: Determine the display mode and main scale interval of the logging image [X L , X R ]; Step b, performing out-of-bounds processing on the portion of the well logging data that is outside the main scale interval, the well logging image corresponding to the out-of-bounds portion of the well logging data is located in the second scale interval and is drawn and displayed at a second scale, the out-of-bounds processing comprising determining the position of the second scale interval relative to the main scale interval according to the size relationship between the data value of the out-of-bounds portion and the endpoint value of the main scale interval; Step c, determining the value of the second ratio; Step d: Calculate the endpoint value X of the second scale interval according to the endpoint value of the main scale interval, the value of the second scale, and the crossing of the logging data. Lo and / or X Ro ; Step e: within the corresponding scale interval, coordinate points are generated according to the data values ​​of the logging data, and a logging image is drawn and displayed according to the coordinate points.

2. The method for displaying a well logging image according to claim 1, characterized in that: In step a, the display mode includes linear scale display and logarithmic scale display; The logarithmic scale displayed on the logarithmic scale has a base of 10.

3. The method for displaying a well logging image according to claim 1, characterized in that: In step b: If the data values ​​of the out-of-bounds part are all less than the left endpoint value X of the main scale interval L , then the second scale interval [X Lo , X L ]; If the data values ​​of the out-of-bounds part are all greater than the right endpoint value X of the main scale interval R , then the second scale interval [X R , X Ro ]; If the data value of the out-of-bounds part is smaller than X L There are also parts greater than X R The second scale interval [X Lo , X L ] and [X R , X Ro ].

4. The method for displaying a well logging image according to any one of claims 1 to 3, characterized in that: Step b also includes determining the color and / or line type of the logging image corresponding to the second proportional scale interval and the main scale interval respectively.

5. The method for displaying a well logging image according to any one of claims 1 to 3, characterized in that: In step c, the value of the second ratio is an integer greater than 0.

6. The method for displaying a well logging image according to claim 2, characterized in that: In step d, the endpoint values ​​of the second scale interval are calculated in the following manner: For linear scale displays: ， ； For logarithmic scale display: ， ； Wherein, n is the value of the second ratio.

7. The method for displaying a well logging image according to claim 1, characterized in that: In step e, when the logging image is displayed, the display area corresponding to the second scale interval and the main scale interval occupies the same area and completely overlaps.

8. An imaging device, using the display method according to any one of claims 1 to 7, characterized in that: include: A data reading module, the data reading module is used to read the well logging data of the well logging image to be displayed; Control module; The control module is used to input control instructions, and the control module can calculate and generate coordinate points of the logging image according to the control instructions and the logging data, and draw the logging image according to the coordinate points; An image display module is used to display the well logging image drawn by the control module.

9. An imaging method, applied to the imaging device as claimed in claim 8, characterized in that: include: Step 1: read the logging data in the memory through the data reading module and pass it to the control module; Step 2: inputting a control instruction to the control module, and the control module determines a second scale interval according to the control instruction and the data value of the logging data and calculates the endpoint value of the second scale interval; Step 3: The control module performs calculation processing on the logging data, generates coordinate points in the corresponding interval according to the calculation results, and draws a logging image according to the coordinate points; Step 4: The image display module receives the data of the well logging image generated by the control module and displays the well logging image on a display screen.

10. The imaging method according to claim 9, characterized in that: The control instructions include selecting a display mode, inputting endpoint values ​​of a main scale interval and a value of a second ratio.

11. The imaging method according to claim 10, characterized in that: The control instruction also includes selecting the display color and line type of the logging image corresponding to the main scale interval and the second proportional scale interval respectively.

Images