Method and system for determining width of geological interlayer based on horizontal hole wall image

Abstract

The invention discloses a method and system for determining the width of a geological interlayer based on a horizontal hole wall image, and the method comprises the following steps: determining the size information of the horizontal hole wall image according to the drilling scale parameters, the horizontal hole wall image comprising a geological interlayer and two parallel boundary lines of the geological interlayer; determining peak valley information of the first boundary line and a first horizontal distance between the first boundary line and the second boundary line according to the size information; and determining the geological interlayer width according to the peak valley information and the first horizontal distance. According to the invention, the size information of the horizontal hole wall image is determined according to the drilling scale parameter, then the peak valley information and the first horizontal distance are determined according to the size information of the horizontal hole wall image, and the geological interlayer width is further calculated, so that the determination of the geological interlayer width does not depend on manpower any more and is more efficient and accurate, the working cost is reduced, and the working efficiency is improved. And a worker can reasonably predict the change trend of the geological layer, so that a more reasonable and safer construction scheme can be formulated.

Description

Technical Field

[0001] The present invention relates to the field of geological exploration technology, and in particular to a method and system for determining the width of a geological interlayer based on a horizontal hole wall image. Background Art

[0002] A geological interlayer refers to a rock or sediment layer between two adjacent parallel geological layers, which is usually formed due to changes in geological periods or specific geological events. In geological exploration, rock layers are usually photographed deep underground to obtain horizontal borehole wall images containing geological interlayers. The geological interlayer in the horizontal borehole wall image usually includes two parallel boundary lines, and the width of the geological interlayer is the vertical distance between the two boundary lines.

[0003] Geological surveyors will manually analyze the horizontal hole wall images by analyzing the direction, texture and morphological characteristics of the rock or sediment layers in the images, and then use special tools or software to calculate the width of the geological interlayer.

[0004] However, manual analysis requires careful observation and analysis of each image, which is a huge workload and highly subjective. In addition, due to the complexity and diversity of the geological environment, the geological features in the images are often difficult to accurately identify, further increasing the difficulty of obtaining the width of the geological interlayer. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses a method and system for determining the width of a geological interlayer based on a horizontal hole wall image.

[0006] The present invention discloses a method for determining the width of a geological interlayer based on a horizontal hole wall image, comprising the following steps:

[0007] Determine the size information of the horizontal hole wall image according to the borehole scale parameter, wherein the horizontal hole wall image includes a geological interlayer and two parallel boundary lines of the geological interlayer;

[0008] Determine peak-to-valley information of the first boundary line and a first horizontal distance between the first boundary line and the second boundary line according to the size information;

[0009] The width of the geological interlayer is determined according to the peak-to-valley information and the first horizontal distance.

[0010] Preferably, the drilling scale parameter is the drilling depth, and the size information of the horizontal hole wall image is the horizontal length of the horizontal hole wall image.

[0011] Preferably, the peak-valley information of the first boundary line is determined according to the size information, specifically:

[0012] The peak point depth and the valley point depth of the first boundary line are determined according to the horizontal length of the horizontal hole wall image.

[0013] Preferably, the first horizontal distance between the first boundary line and the second boundary line is determined according to the size information, specifically:

[0014] Acquire a boundary point on each of the two parallel boundary lines, wherein the two boundary points are on the same horizontal line;

[0015] A first horizontal distance between two boundary points is determined according to a horizontal length of the horizontal hole wall image.

[0016] Preferably, the width of the geological interlayer is determined according to the peak-to-valley information and the first horizontal distance, specifically:

[0017] Determine the inclination angle of the geological interlayer according to the peak depth, valley depth and borehole diameter of the first boundary line;

[0018] The width of the geological interlayer is determined according to the first horizontal distance and the inclination angle of the geological interlayer.

[0019] Preferably, the inclination angle of the geological interlayer is determined according to the peak depth, valley depth and borehole diameter of the first boundary line, specifically:

[0020] Determining a second horizontal distance between a peak point and a valley point on the first boundary line according to the peak point depth and the valley point depth;

[0021] The inclination angle of the geological interlayer is determined according to the second horizontal distance and the borehole diameter.

[0022] The present invention also discloses a system for determining the width of a geological interlayer based on a horizontal hole wall image, comprising:

[0023] A size information determination module: used to determine the size information of a horizontal hole wall image according to the borehole scale parameters, wherein the horizontal hole wall image includes a geological interlayer and two parallel boundary lines of the geological interlayer;

[0024] A peak-valley information and horizontal distance determination module: used to determine the peak-valley information of the first boundary line and the first horizontal distance between the first boundary line and the second boundary line according to the size information;

[0025] A geological interlayer width determination module is used to determine the geological interlayer width according to the peak-valley information and the first horizontal distance.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention determines the size information of the horizontal hole wall image according to the borehole scale parameters, and then determines the peak-valley information and the first horizontal distance according to the size information of the horizontal hole wall image, and then obtains the width of the geological interlayer, so that the determination of the width of the geological interlayer no longer depends on manual subjective judgment, which is more efficient and accurate, and reduces the working cost;

[0028] (2) The present invention determines the size information of the horizontal hole wall image, making the boundary line distance and peak-valley information of the geological interlayer in the horizontal hole wall image more intuitive, which helps the staff to quantitatively analyze the structure and distribution of the geological layer and reasonably predict the change trend of the geological layer, so as to formulate a more reasonable and safer construction plan;

[0029] (3) The present invention determines the width of the geological interlayer according to the first horizontal distance between the first boundary line and the second boundary line and the peak-to-valley information of the first boundary line, which provides a basis for technicians to determine the geological interlayer information. The calculation method is correct, the result is accurate, the data accuracy is improved, and the application value is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic flow diagram of the method of the present invention;

[0031] Figure 2 It is a plane hole wall model diagram of the present invention;

[0032] Figure 3 It is a model diagram of a columnar hole wall of the present invention;

[0033] Figure 4 This is a model diagram of the cylindrical hole wall after rotation;

[0034] In the figure, 1 is the first geological layer; 2 is the second geological layer; 3 is the geological interlayer; 4 is the first boundary line; and 5 is the second boundary line. DETAILED DESCRIPTION

[0035] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0036] like Figure 1 As shown, the present invention discloses a method for determining the width of a geological interlayer, comprising the following steps:

[0037] S1, determining the size information of the horizontal hole wall image according to the borehole scale parameter, wherein the horizontal hole wall image includes the geological interlayer 3 and two parallel boundary lines of the geological interlayer 3;

[0038] like Figure 2 As shown, the horizontal borehole wall image is generated based on the borehole wall data collected by the horizontal borehole. The horizontal borehole wall image is equivalent to the actual state of the borehole expansion. The left side corresponds to the top of the borehole, and the right side corresponds to the bottom of the borehole. The horizontal borehole wall image also includes the first geological layer 1, the second geological layer 2, and the geological interlayer 3. The boundary between the geological interlayer 3 and the first geological layer 1 is called the first boundary line 4, and the boundary between the geological interlayer 3 and the second geological layer 2 is called the second boundary line 5. The first boundary line 4 and the second boundary line 5 are two parallel sine curves; for the convenience of description, in the sine curve, the apex of two adjacent waves is marked as a peak point and a valley point respectively.

[0039] The drilling scale parameters include the drilling depth and the drilling diameter, which are all known values. Accordingly, S1 is specifically:

[0040] S11, determining the horizontal length of the horizontal hole wall image according to the drilling hole depth,

[0041] S12. Determine the vertical width of the horizontal hole wall image according to the borehole diameter.

[0042] In one embodiment, the specific implementation method of step 1 is: use relevant mapping software to open the horizontal hole wall image, set relevant parameters in the mapping software, so that the horizontal length of the horizontal hole wall image opened by the mapping software is the same as the borehole depth, and the vertical width is the same as the borehole circumference. At this time, on the horizontal hole wall image opened in the relevant mapping software, the size information of each point is completely consistent with the actual borehole wall.

[0043] The present invention determines the size information of the horizontal hole wall image, so that the boundary line distance and peak-valley information of the geological interlayer 3 in the horizontal hole wall image are more intuitive, which helps the staff to quantitatively analyze the structure and distribution of the geological layer and reasonably predict the change trend of the geological layer, so as to formulate a more reasonable and safer construction plan.

[0044] S2. Determine the peak-to-valley information of the first boundary line 4 and the first horizontal distance between the first boundary line 4 and the second boundary line 5 according to the size information; the first boundary line 4 can be any boundary line, and the first boundary line 4 can also be specified or determined according to actual conditions.

[0045] Preferably, the peak and valley information of the first boundary line 4 is determined according to the size information, specifically:

[0046] The peak depth and valley depth of the first boundary line 4 are determined according to the horizontal length of the horizontal hole wall image.

[0047] Preferably, the first horizontal distance between the first boundary line 4 and the second boundary line 5 is determined according to the size information, specifically:

[0048] Obtain a boundary point on each of the two parallel boundary lines, and the two boundary points are on the same horizontal line; for the convenience of subsequent description, the two boundary points are respectively recorded as the first boundary point and the second boundary point;

[0049] The first horizontal distance between the two boundary points is determined according to the horizontal length of the horizontal hole wall image.

[0050] In one embodiment, any vertex on the first hole wall line is taken as the origin (e.g. Figure 2 Point F in the middle), with the extension direction of the drilling hole as the positive direction of the horizontal axis and the extension direction of the perimeter of the drilling hole as the direction of the vertical axis, establish a two-dimensional coordinate system;

[0051] The horizontal distance relationship between each point on the first boundary line 4 and the second hole wall line is obtained by using relevant mapping software, and the depth of each boundary point on the first boundary line 4 is determined according to the horizontal distance relationship and the horizontal length of the horizontal hole wall image (that is, the difference between the horizontal length of the horizontal hole wall image and the corresponding horizontal distance relationship).

[0052] The first hole wall line is a horizontal hole wall image boundary line close to the top of the borehole, and the second hole wall line is a horizontal hole wall image boundary line close to the bottom of the borehole; and the extension directions of the first hole wall line and the second hole wall line are consistent with the extension direction of the first boundary line 4.

[0053] The above process has obtained the depth of each boundary point on the first boundary line 4 . Similarly, the depth of each boundary point on the second boundary line 5 can also be obtained.

[0054] Furthermore, any two points on the first boundary line 4 and the second boundary line 5 that are on the same horizontal line, as well as the peak points and valley points, can be determined by technicians by naked eye observation, with the aid of measuring tools or mapping software. The depth and height of each point are obtained in the above process, and the corresponding first horizontal distance (the depth difference between the first boundary point and the second boundary point) and the subsequent second horizontal distance (the depth difference between the peak point and the valley point) can be calculated accordingly.

[0055] The present application keeps the length and width of the horizontal hole wall image consistent with the borehole depth and borehole circumference, respectively, so that the vertical and horizontal proportions of the horizontal hole wall image are not distorted. A person skilled in the art can directly obtain the true position of any point on the boundary line of the geological interlayer 3 without performing proportional conversion, thus avoiding the cumbersome calculation process and the errors caused by the calculation.

[0056] S3. Determine the width of the geological interlayer according to the peak-to-valley information and the first horizontal distance.

[0057] Preferably, S3 is specifically:

[0058] S31, determining the inclination angle of the geological interlayer according to the peak depth, valley depth and borehole diameter of the first boundary line;

[0059] Preferably, S31 is specifically:

[0060] S311, determining a second horizontal distance between a peak point and a valley point on the first boundary line according to the peak point depth and the valley point depth;

[0061] S312, determining the inclination angle of the geological interlayer according to the second horizontal distance and the borehole diameter.

[0062] S32. Determine the width of the geological interlayer according to the first horizontal distance and the inclination angle of the geological interlayer.

[0063] Combination Figure 3 , Figure 4 , an example is given to illustrate the process of determining the first horizontal distance, the second horizontal distance and the straight-line distance, and calculating the width of the geological interlayer:

[0064] exist Figure 4 In the figure, point B is the peak point, point A is the valley point, and point A and B are connected to form a line segment AB. The depth difference between points A and B is , Take a positive value. is the second horizontal distance; the straight-line distance between points A and B is the straight-line distance between the peak point and the valley point.

[0065] Points M and N are boundary points on the first boundary line 4 and the second boundary line 5, respectively. At the same time, M and N are on the same horizontal line. Connecting points M and N forms a line segment MN. The depth difference between points M and N is , Take a positive value.

[0066] This application is implemented by formula Directly calculate the width of the geological interlayer, where: is the dip angle of the geological interlayer; is the width of the geological interlayer, is the drilling diameter.

[0067] The following is the formula Determination process:

[0068] Step 1: Establish a geological interlayer plane model diagram based on the hole wall image.

[0069] For the convenience of analysis, Figure 2 The image containing the three parts of the geological interlayer is established as follows Figure 3The plane model diagram of the geological interlayer shown in FIG. 1 ; the left side of the geological interlayer 3 is the first geological layer 1, and the right side is the second geological layer 2. Point B is taken as the peak point of the first boundary line 4, point A is taken as the valley point of the first boundary line 4, point D is taken as the peak point of the second boundary line 5, point C is taken as the valley point of the second boundary line 5, and points M and N are respectively located on the first boundary line 4 and the second boundary line 5, and points M and N are on the same horizontal line; for the convenience of subsequent description of this embodiment, points A and C are selected to be on the same horizontal line, and points B and D are also on the same horizontal line.

[0070] Step 2: Establish a columnar hole wall model diagram based on the geological interlayer plane model diagram.

[0071] right Figure 2 Curl to form Figure 3 The cylindrical hole wall model diagram is shown. Figure 2 The first and second boundary lines are formed in Figure 3 The elliptical boundaries on both sides of the middle geological interlayer 3, B, M, A on the first boundary line 4 form a surface BMA, and D, N, C on the second boundary line 5 form a surface DNC.

[0072] Step 3: Determine the calculation method of geological interlayer width based on the columnar hole wall model diagram.

[0073] Establish a spatial rectangular coordinate system with the center of the hole as the coordinate origin, the upward direction as the Y axis, and the direction of the drilling center axis as the Z axis, and then rotate around the Z axis. Figure 3 ,get Figure 4 , Figure 4 Point A rotates to the highest position, and correspondingly, point C is at the highest position, points B and D are at the lowest position, and A, B, C, and D are all on the vertical plane YZ.

[0074] The present invention makes the calculation of the width of the geological interlayer simpler and easier to understand by establishing a geological interlayer plane model diagram and a columnar hole wall model diagram.

[0075] like Figure 4 , connect AB and CD, draw a perpendicular line to AB through point D, and intersect AB at point E. According to symmetry, DE is perpendicular to the first geological layer 1, so the length of DE is the width of the geological interlayer.

[0076] Draw a perpendicular line through point A, intersecting BD at A'. AA' is the diameter of the hole. , at right angles middle, (Right now ) is the inclination angle of the geological interlayer.

[0077] Depend on Figure 4 The triangle relationship shows that at a right angle In the example, knowing the diameter of the hole and the length of any other side can solve AB is the straight-line distance between the peak point and the valley point on the first boundary line 4 (reference Figure 4 , calculated based on the depth of the peak and valley points, the borehole diameter and the Pythagorean theorem); BA' is the second horizontal distance between the peak point and the valley point on the first boundary line 4.

[0078] In this embodiment, according to the borehole diameter and the second horizontal distance, ,

[0079] but

[0080] In other embodiments, the solution can also be obtained based on the borehole diameter and the straight-line distance between the peak point and the valley point on the first boundary line 4. ,

[0081] but

[0082] like Figure 4 As shown, the first horizontal distance between the first boundary line 4 and the second boundary line 5 is MN or BD; DE represents the width of the geological interlayer.

[0083] Then we have:

[0084] Where: DE is the width of the geological interlayer (mm); BD and MN are the first horizontal distances (mm); is the borehole diameter (mm); BA' is the second horizontal distance (mm).

[0085] The present invention obtains a columnar hole wall model diagram and peak and valley information and boundary line information on the columnar hole wall model diagram based on the hole wall optical image, so that the calculation of the geological interlayer width is no longer dependent on manual labor, is more efficient and accurate, and reduces work costs.

[0086] The present invention also discloses a system for determining the width of a geological interlayer based on a horizontal hole wall image, comprising:

[0087] A size information determination module is used to determine the size information of a horizontal hole wall image according to the borehole scale parameters, wherein the horizontal hole wall image includes a geological interlayer 3 and two parallel boundary lines of the geological interlayer 3;

[0088] Peak-valley information and horizontal distance determination module: used to determine the peak-valley information of the first boundary line 4 and the first horizontal distance between the first boundary line 4 and the second boundary line 5 according to the size information;

[0089] Geological interlayer width determination module: used to determine the geological interlayer width according to the peak-valley information and the first horizontal distance.

[0090] Compared with the prior art, the present invention has the following beneficial effects:

[0091] (1) The present invention determines the size information of the horizontal hole wall image according to the borehole scale parameters, and then determines the peak-valley information and the first horizontal distance according to the size information of the horizontal hole wall image, and then obtains the width of the geological interlayer, so that the determination of the width of the geological interlayer no longer depends on manual subjective judgment, which is more efficient and accurate, and reduces the working cost;

[0092] (2) The present invention determines the size information of the horizontal hole wall image, making the boundary line distance and peak-valley information of the geological interlayer in the horizontal hole wall image more intuitive, which helps the staff to quantitatively analyze the structure and distribution of the geological layer and reasonably predict the change trend of the geological layer, so as to formulate a more reasonable and safer construction plan;

[0093] (3) The present invention determines the width of the geological interlayer according to the first horizontal distance between the first boundary line and the second boundary line and the peak-to-valley information of the first boundary line, which provides a basis for technicians to determine the geological interlayer information. The calculation method is correct, the result is accurate, the data accuracy is improved, and the application value is higher.

[0094] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A method for determining the width of a geological interlayer based on a horizontal hole wall image, characterized in that: The following steps are involved: Determine the size information of the horizontal hole wall image according to the borehole scale parameter, wherein the horizontal hole wall image includes a geological interlayer and two parallel boundary lines of the geological interlayer; Determine peak-to-valley information of the first boundary line and a first horizontal distance between the first boundary line and the second boundary line according to the size information; The width of the geological interlayer is determined according to the peak-to-valley information and the first horizontal distance.

2. The method for determining the width of a geological interlayer based on a horizontal hole wall image according to claim 1, characterized in that: The drilling scale parameter is the drilling depth, and the size information of the horizontal hole wall image is the horizontal length of the horizontal hole wall image.

3. The method for determining the width of a geological interlayer based on a horizontal hole wall image according to claim 2, characterized in that: Determine the peak and valley information of the first boundary line according to the size information, specifically: The peak point depth and the valley point depth of the first boundary line are determined according to the horizontal length of the horizontal hole wall image.

4. The method for determining the width of a geological interlayer based on a horizontal hole wall image according to claim 2, characterized in that: Determine the first horizontal distance between the first boundary line and the second boundary line according to the size information, specifically: Acquire a boundary point on each of the two parallel boundary lines, wherein the two boundary points are on the same horizontal line; A first horizontal distance between two boundary points is determined according to a horizontal length of the horizontal hole wall image.

5. The method for determining the width of a geological interlayer based on a horizontal hole wall image according to claim 3, characterized in that: The width of the geological interlayer is determined according to the peak-to-valley information and the first horizontal distance, specifically: Determine the inclination angle of the geological interlayer according to the peak depth, valley depth and borehole diameter of the first boundary line; The width of the geological interlayer is determined according to the first horizontal distance and the inclination angle of the geological interlayer.

6. The method for determining the width of a geological interlayer based on a horizontal hole wall image according to claim 5, characterized in that: According to the peak depth, valley depth and borehole diameter of the first boundary line, the inclination angle of the geological interlayer is determined, specifically: Determining a second horizontal distance between a peak point and a valley point on the first boundary line according to the peak point depth and the valley point depth; The inclination angle of the geological interlayer is determined according to the second horizontal distance and the borehole diameter.

7. A system for determining the width of geological interlayers based on horizontal hole wall images, characterized in that: include: A size information determination module is used to determine the size information of a horizontal hole wall image according to the borehole scale parameters, wherein the horizontal hole wall image includes a geological interlayer and two parallel boundary lines of the geological interlayer; A peak-valley information and horizontal distance determination module: used to determine the peak-valley information of the first boundary line and the first horizontal distance between the first boundary line and the second boundary line according to the size information; A geological interlayer width determination module is used to determine the geological interlayer width according to the peak-valley information and the first horizontal distance.

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