Secondary well filter design method

Abstract

The present invention provides a secondary well filter design method, which relates to the field of in situ leaching uranium technology, including obtaining first information; screening well logging data after removing mudstone data in the first information according to lithology; screening high-grade uranium ore data in the well logging data; screening continuous and mining-worthy ore sections of each single well; screening multi-segment mine single wells with two or more ore sections in the continuous and mining-worthy ore sections, extracting the mine location data of the multi-segment mine single well and all its unit wells and judging the main ore section in each multi-segment mine single well; calculating the average value of the ore section length in the concentrated interval of the well field ore section length value according to the mine location data of the main ore section in the multi-segment mine single well and the single-segment mine single well, and taking the average value as the design length of the filter. The present invention improves the filter design efficiency and ensures the overall leaching effect of the well field.

Description

Technical Field

[0001] The invention relates to the technical field of in-situ leaching of uranium, and in particular to a secondary well formation filter design method. Background Art

[0002] Secondary well construction technology collects geophysical well data by drilling in large uranium mining areas, and then uses professional geological software and numerical simulation software to simulate the scheme to select the best well site filter design scheme. The overall process is both fast and efficient, overcoming the problems of traditional in-situ leaching uranium filter design schemes being single and slow in well construction. When designing large-scale mining areas, the manual design of the filter is limited by the data of a single well, and it is difficult to take into account the overall well site situation. The underground has lithological stratification, and the flow field has large-scale unidirectional flow. The final design may have problems such as insufficient pumping and injection, a small leaching range, and poor leaching effect. Summary of the invention

[0003] The purpose of the present invention is to provide a secondary well filter design method to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0004] In a first aspect, the present application provides a secondary well filter design method, comprising:

[0005] Acquire first information, wherein the first information includes original well logging data of each single well in the well site, wherein the original well logging data includes ore section location data, lithology, and uranium ore grade;

[0006] Filtering the well logging data after removing the mudstone data from the first information according to the lithology;

[0007] Screening out uranium ore data with uranium ore grade values ​​higher than a preset uranium ore grade threshold from the well logging data to obtain high-grade uranium ore data;

[0008] Screening the high-grade uranium ore data according to preset screening conditions to obtain a continuous and mining-worthy ore section for each single well;

[0009] Screening out multi-segment mine single wells with two or more mine sections in the continuous and mining-worthy mine section, and extracting the mine location data of the multi-segment mine single well and all its unit wells;

[0010] Determine the main mining section in each of the multi-segment single mine wells according to the mine location data of the multi-segment single mine well and all its unit wells, and take the single-segment single mine well itself, which has only one mining section in the continuous mining section with mining value, as the main mining section of the single-segment single mine well;

[0011] The average value of the length of the mine section in the concentrated interval of the well field mine section length value is calculated according to the mine location data of the main mine section in the multi-section mine single well and the single-section mine single well, and the average value is used as the design length of the filter.

[0012] In a second aspect, the present application also provides a secondary well filter design device, comprising:

[0013] An acquisition module, the acquisition module is used to acquire first information, the first information includes raw well logging data of each single well in the well site, the raw well logging data includes ore section location data, lithology and uranium ore grade;

[0014] a first screening module, the first screening module being used to screen the well logging data after removing the mudstone data in the first information according to the lithology;

[0015] A second screening module, the second screening module is used to screen out uranium ore data with uranium ore grade values ​​higher than a preset uranium ore grade threshold value from the well logging data to obtain high-grade uranium ore data;

[0016] A third screening module, the third screening module is used to screen the high-grade uranium ore data according to a preset screening condition to obtain a continuous and mining-worthy ore section for each single well;

[0017] A fourth screening module, the fourth screening module is used to screen out multi-segment mine single wells with two or more mine sections in the continuous and mining-worthy mine section, and extract the mine location data of the multi-segment mine single well and all its unit wells;

[0018] A judgment module, the judgment module is used to judge the main mining section in each of the multi-segment mine single wells according to the mine location data of the multi-segment mine single well and all its unit wells, and to take the single-segment mine single well itself which has only one mining section in the continuous mining section with mining value as the main mining section of the single-segment mine single well;

[0019] A calculation module is used to calculate the average value of the length of the mine section in the concentrated interval of the mine section length value of the well field according to the mine location data of the main mine section in the multi-section mine single well and the single-section mine single well, and use the average value as the design length of the filter.

[0020] In a third aspect, the present application also provides a secondary well filter design device, comprising:

[0021] Memory for storing computer programs;

[0022] A processor is used to implement the steps of the secondary well formation filter design method when executing the computer program.

[0023] In a fourth aspect, the present application further provides a readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the above-mentioned secondary well filter design method are implemented.

[0024] The beneficial effects of the present invention are as follows: the present invention can, through the secondary well formation filter design method, quickly carry out integrated design of the well field according to the overall geophysical well logging data of the mining area, thereby saving manpower input and improving the filter design efficiency. The design method of regionalized coordinated design of the well field created by the present invention is more scientific and reasonable, and ensures the overall leaching effect of the well field.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic flow chart of the secondary well filter design method described in an embodiment of the present invention;

[0029] Figure 2 It is a curve diagram of effective impregnation volume of each filter scheme in the embodiment of the present invention;

[0030] Figure 3 It is a curve diagram of the effective impregnation volume ratio of each filter scheme in the embodiment of the present invention;

[0031] Figure 4 It is a bar graph of the effective impregnation volume ratio of each filter scheme at 1000 days in the embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the secondary well filter design equipment described in an embodiment of the present invention.

[0033] Markings in the figure: 800, secondary well filter design equipment; 801, processor; 802, memory; 803, multimedia component; 804, I / O interface; 805, communication component. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] Embodiment 1:

[0037] This embodiment provides a method for designing a secondary well filter.

[0038] See also Figure 1 , the figure shows that the method includes step S100, step S200, step S300, step S400, step S500, step S600, and step S700.

[0039] Step S100: Acquire first information, wherein the first information includes raw logging data of each single well in the well site, wherein the raw logging data includes ore section location data, lithology and uranium ore grade;

[0040] Step S200: filtering the well logging data after removing the mudstone data in the first information according to the lithology;

[0041] The conventional lithology permeability in sandstone uranium reservoirs is divided into mudstone, fine sandstone, medium sandstone, coarse sandstone and conglomerate from small to large. The permeability of mudstone is extremely low and cannot be used as an in situ leaching seepage channel. In order to ensure that the water inflow at the design location of the filter meets the requirements of in situ leaching uranium mining, the mudstone layer must be reasonably avoided during design. In addition, some mudstones have a high uranium content, but cannot be used as a recoverable resource under the in situ leaching method. Therefore, when processing logging data, mudstone data is first screened out, and other lithology data are retained as the main design basis for the filter location.

[0042] Step S300: screening out uranium ore data with uranium ore grade values ​​higher than a preset uranium ore grade threshold from the well logging data to obtain high-grade uranium ore data;

[0043] The uranium ore grades of different lithological layers are different. The design process needs to take the mining section with mining value as the main water-passing position to design the filter height. For this purpose, it is necessary to screen out the high-grade uranium ore in the logging data, and set the data filtering condition to the uranium ore grade column value higher than 0.01% (in some specific practices, the development goals are different, such as increasing the overall recovery rate of uranium ore or improving the economic benefits of the project, the requirements for the recovery grade of uranium ore are different, and the filter condition value can be adjusted according to the specific development needs), and retain the screened high-grade uranium ore data.

[0044] Step S400: screening the high-grade uranium ore data according to preset screening conditions to obtain a continuous and mining-worthy ore section for each single well;

[0045] Non-mineral layers are often interspersed between uranium ore layers. The small-thick non-mineral layers interspersed between ore layers have little effect on the overall leaching of uranium ore, and adjacent ore layers can be regarded as continuous layers.

[0046] The step S400 specifically includes:

[0047] A first screening condition, a second screening condition and a third screening condition are preset, wherein the first screening condition is used to determine whether the distance between the bottom depth of the upper mining section and the top depth of the lower mining section in each mining section of the single well satisfies less than or equal to 1m, the second screening condition is used to determine whether the total length of the continuous mining sections in the single well satisfies greater than or equal to 2m, and the third screening condition is used to determine whether the ratio of the actual total length of all the mining sections in the single well to the total length of the continuous mining sections in the single well satisfies greater than 0.7;

[0048] When all the ore sections of the single well do not meet the first screening condition, extract the longest ore section in the single well as the continuous ore section, and judge whether the length of the continuous ore section meets the second screening condition, and if so, judge the continuous ore section as the continuous ore section with mining value;

[0049] When there is only one mining section in the single well, the only mining section in the single well is taken as the continuous mining section, and whether the length of the continuous mining section meets the second screening condition is determined, and if so, the continuous mining section is determined to be the continuous mining section with mining value;

[0050] When there is a situation that satisfies the first screening condition in each mining section of the single well, the previous mining section and the next mining section that meet this situation are taken as the continuous mining section. If the total length of the continuous mining section does not meet the second screening condition, the continuous mining section is judged to be a mining section with no mining value. If the total length of the continuous mining section meets the second screening condition, it is further judged whether the ratio of the actual total length of all the mining sections in the single well to the total length of the continuous mining section meets the third screening condition. If so, the continuous mining section is judged to be a mining section with mining value. If not, the continuous mining section with the largest continuous length in the single well is first selected. The section of ore closest to the continuous ore section is obtained as a superimposed ore section, and the first screening condition, the second screening condition and the third screening condition are continued to be used to verify the superimposed ore section. If the first screening condition, the second screening condition and the third screening condition are met, the nearest section of ore is continued to be superimposed on the basis of the superimposed ore section until the first screening condition, the second screening condition and the third screening condition are no longer met. Finally, the starting and ending points of the ore section after the last superimposed ore section are returned, and this is used as the continuous uranium ore section with mining value, wherein the total length of the continuous ore section is the difference between the bottom depth of the last section of the continuous ore section and the top depth of the first section of the continuous ore section.

[0051] Step S500: screening out multi-segment mine single wells with two or more mine segments from the continuous and exploitable mine segment, and extracting the mine location data of the multi-segment mine single well and all its unit wells;

[0052] Step S600: determining the main mining section in each of the multi-segment single mine wells according to the mine location data of the multi-segment single mine well and all its unit wells, and taking the single-segment single mine well having only one mining section in the continuous mining sections with mining value as the main mining section of the single-segment single mine well;

[0053] The step S600 specifically includes:

[0054] Obtaining the mine location data of the multi-section mine single well and all its unit wells, wherein the mine location data of the multi-section mine single well includes the mine section starting position and the mine section ending position of each mine section in the multi-section mine single well, and the mine location data of the unit well includes the mine section starting position and the mine section ending position of the unit well;

[0055] Calculate the center depth of the mining section of the unit well according to the starting point position and the end point position of the mining section of the unit well, and calculate the average center depth of the mining section of all unit wells according to the center depth of the mining section of each unit well;

[0056] Calculate the center depth of each section of the mine in the multi-section mine single shaft according to the starting point position and the end point position of each section of the mine in the multi-section mine single shaft;

[0057] In the multi-section mine single well, the mine section whose center depth is closest to the average center depth of the mine section is screened out and used as the main mine section.

[0058] Due to the differences in the distribution of mines, some well locations will have multiple mine sections. The determination of the main mining section should be based on the location of the surrounding well mining layers to ensure that the developed mining layer is at the same level as the surrounding well mining layers. Its characteristic is that it is highly close to the surrounding well mining sections.

[0059] Step S700: Calculate the average value of the length of the mine section in the concentrated interval of the well field mine section length value according to the mine location data of the main mine section in the multi-section mine single well and the single-section mine single well, and use the average value as the design length of the filter.

[0060] The step S700 specifically includes:

[0061] Calculate the length of the main ore section in the multi-section mine single shaft according to the mine location data of the main ore section in the multi-section mine single shaft;

[0062] Calculate the length of the main ore section in the single-stage mine and single well according to the mine location data of the main ore section in the single-stage mine and single well;

[0063] Calculate the length standard deviation of each main ore section according to the length of the main ore section in the single well of the multi-stage mine and the length of the main ore section in the single well of the single-stage mine;

[0064] If the standard deviation of the length does not exceed 1.2, the average value is calculated based on the lengths of all the main ore sections;

[0065] If the length standard deviation exceeds 1.2, the lengths of all the main ore sections are sorted from small to large, and 10% of the data are screened out:

[0066] The first data point in the sorting is taken as the starting point of 90% of the data points, the distance value between every two adjacent data points in the sorting is calculated, and it is iterated downward in sequence until the last data point is the end point of 90% of the data points, and the last data point that satisfies the minimum distance value between the beginning and the end of the data is taken as the end point, and it is determined whether the length standard deviation calculated based on 90% of the data points satisfies not exceeding 1.2. If so, the length average value of 90% of the data points is taken as the average value. If not, the 10% data screening is repeated on the basis of 90% of the data points until the length standard deviation satisfies not exceeding 1.2, and the length average value calculated when it is satisfied is taken as the average value.

[0067] The calculation formula of the standard deviation is:

[0068]

[0069] Where s is the standard deviation, x1, x2...x m The thickness of the main ore section of the 1st, 2nd....m sections, is the average thickness of the ore layer, and m is the total number of the main ore sections.

[0070] The design method further comprises:

[0071] Extracting the highest point and the lowest point of all the main ore sections;

[0072] Iterate downwards through the filter of the designed length from the highest point of the starting point of the main ore section as the upper end position of the filter, increase the depth by 1m each iteration, and after the last iteration, the lower end position of the filter does not exceed the lowest point of the ending point of the main ore section, and calculate the total overlapping length of the overlapping parts of the filter and all the main ore sections in each iteration;

[0073] According to the total overlapping length of the filter and all the main ore sections in each iteration, the number of iterations when the total overlapping length is maximum is extracted, and the upper and lower end positions of the filter at the number of iterations when the total overlapping length is maximum are obtained. The upper and lower end positions of the filter at the number of iterations when the total overlapping length is maximum are the filter height.

[0074] The design method further comprises:

[0075] At the filter height, the ratio of the overlap value between the filter and the main ore section in each single well to the length of the main ore section is calculated, and the ratio is the ore section matching degree of the single well;

[0076] According to the ore section matching degree of each single well, the single wells with a ore section matching degree less than 50% are screened out, and the single wells with a ore section matching degree less than 50% are taken as target single wells;

[0077] Acquire the mining section data of each target single well unit well group;

[0078] According to the mining section data of the unit well group, the average center height of the continuous and mining-worthy mining section in the unit well group is calculated, and the average center height is used as the center height of the filter of the target single well. According to the center height of the filter and the design length of the filter, the corrected filter height of each target single well is obtained.

[0079] Due to the complex distribution of underground ore layers, the height of the ore layers in some wells is much different from that in other wells, or there are screening errors in multiple sections of ore, so it is necessary to identify these wells and handle the filter height separately. Among them, the matching degree between the filter position and the ore section position determines the leaching effect of uranium ore.

[0080] The design method also includes modifying the design length of the filter, including:

[0081] Calculate the length ratio of mudstone in the filter height corresponding to each single well according to the original well logging data of each single well;

[0082] Screening out the single wells whose length accounts for more than 10%, and obtaining the mudstone thickness of the mudstone;

[0083] The length value of 1 / 2 of the mudstone thickness is respectively added to both ends of the filter of the designed length to obtain a corrected filter design length.

[0084] When the thickness of the mudstone layer mixed with the ore layer is too large, the water inflow of the filter will be greatly reduced, making it difficult to meet the water inflow requirements of the adjacent injection wells. Therefore, the filter length of these wells should be screened and corrected.

[0085] The present invention is further described below by taking the processing of logging data of 40 wells in a mining area as an example. The filter position of each well in the mining area is designed according to the processing results, and the leaching effect of the designed mining area filter is evaluated by applying the numerical simulation method.

[0086] (1) The well logging data includes the location, lithology, thickness and uranium grade of the ore section. Due to the large amount of well logging data, only the well logging data of one well is shown here, and the implementation method of the filter design in this example is explained in detail. The original well logging data of C-B1 well is shown in Table 1.

[0087] Table 1

[0088]

[0089] (2) According to the design method of the present invention, first, the mudstone layer data of the C-B1 well is screened out, and the remaining data are as follows. The logging data of C-B1 after removing the mudstone is shown in Table 2:

[0090] Table 2

[0091]

[0092] (3) The data after removing the mudstone were used to identify high-grade uranium ore. The screening condition was set to uranium ore grade greater than 0.01%. The high-grade uranium ore data after screening are as follows:

[0093] The data of C-B1 high-grade uranium ore are shown in Table 3

[0094] Table 3

[0095]

[0096] The difference between the top depth of the next mining section and the bottom depth of the previous mining section is less than or equal to 1m.

[0097] (4) Screening of continuous and mining-worthy uranium ore sections: The above data are processed and the screening conditions are as follows:

[0098] First screening condition:

[0099]

[0100] Second screening condition:

[0101]

[0102] The third screening condition:

[0103]

[0104] in is the top depth of the n+1th layer mining section, is the bottom depth of the nth layer of the ore section, P is the actual thickness ratio of the uranium ore section in the continuous ore section thickness, T U总 is the total true thickness of the uranium ore section, T H总 is the total thickness of the continuous ore section, is the depth of the bottom of the i-th section of the mine, is the top depth of the i-th section mine, The depth of the bottom of the mine at the end of the continuous mining section. The top depth of the first section of the continuous mining section, N is the total number of continuous mining sections.

[0105] There are non-ore layers between the three sections of the C-B1 well. According to the determination method of continuous ore sections, the height difference between the three sections is less than 1m, and it is determined to be a continuous ore section. The total thickness of the continuous ore section is:

[0106]

[0107] Total thickness of each small layer in the continuous mining section:

[0108]

[0109] The actual thickness of the uranium ore section in the continuous ore section thickness is as follows:

[0110]

[0111] Through the determination method in this method, for the calculation of the three sections of the C-B1 well, its ore layer conditions meet the determination criteria of continuity of this single well and having mining value. It is determined that the uranium ore depth of the continuous ore section of the C-B1 well is 377.85 to 384.05 meters, and the total thickness of the ore layer is 6.2m.

[0112] (5) Determination of multi-segment mines Among the 40 well logging data in this example, 7 wells have multi-segment mines. The main mine segment delineation method of multi-segment mines is applied to retrieve the mine segment data of the surrounding wells of the 7 wells. Among them, Z-C6 has two mine segments. Its unit mine segment data and unit mine segment data are shown in Table 4 below:

[0113] Table 4

[0114] Z-C6 mining section Mine section Mine section stop Depth of center of mine section 1 section mine 374.25 375.45 374.85 Section 2 Mine 390.75 398.15 394.45

[0115] Table 5

[0116]

[0117] It is calculated from Table 5 above that the average center depth of the mining section of the Z-C6 unit well is 393.3m, which is close to the 2nd mining section of the Z-C6 well. The logging data of the 2nd mining section is retained as the main mining section position of the well.

[0118] The main mining section determination method of the other 6 multi-section mines is the same as that of Z-C6. The logging data of the main mining section retained in the final mining section are shown in Table 6 below:

[0119] Table 6

[0120] well name Mine section Mine section stop Z-A5 393.65 398.15 Z-A7 390.55 397.15 Z-A8 391.25 393.45 C-B6 390.15 395.25 Z-C5 392.95 398.35 C-D4 394.95 399.55 C-D7 390.65 393.75

[0121] (6) Determine the filter length: The main ore section height data of the 40 single well logging data collected in this block after being processed by the above method are shown in Table 7 below:

[0122] Table 7

[0123]

[0124] The calculated standard deviation of the 40 wells is 1.49, the standard deviation of 90% of the data is 1.26, and the standard deviation of 80% of the data is 1.14, which meets the design standards. The 80% data is used as the design basis for the filter length. The average length of the mining section is 5.73m, and this length is used as the design length of the filter.

[0125] The data of 80% of the mine sections that meet the design standards in the mining area are shown in Table 8:

[0126] Table 8

[0127]

[0128] (7) Determine the filter height: The highest point of the mining section in the well logging data in the above table is 377.85m, and the lowest point of the mining section is 405.65m. According to the previous step, the filter design length has been determined to be 5.73m. Iterate downward from the mining section position of 377.85m-383.58m, and increase the depth by 1m each time. The bottom depth of the filter in the last iteration does not exceed 405.65m. Calculate the total overlapping length of the mining section under each filter position. A total of 23 iterations were performed, and the iterative filter positions and the total overlapping length data with the mining section are as follows:

[0129] The total overlapping length of the filter and the mining section at each position height is shown in Table 9:

[0130] Table 9

[0131]

[0132] According to the calculation results of the filter position and the total length of overlap with the mining section, the total length of overlap of the 15th iteration data is the largest, with a maximum value of 110.74m, that is, the filter depth (391.85m-397.58m) under the 15th iteration is the optimal filter layout position.

[0133] (8) Correction of single well filter height: First, calculate the matching degree between each well filter and the ore layer, and compare the filter interval height calculated in the previous step with the position of each well ore section. The matching degree calculation results of 40 wells are shown in Table 10 below:

[0134] Table 10

[0135] well name Match well name Match well name Match well name Match Z-A1 6.98％ C-B1 0.00％ Z-C1 100.00％ C-D1 100.00％ Z-A2 67.31％ C-B2 82.55％ Z-C2 5.56％ C-D2 100.00％ Z-A3 93.57％ C-B3 100.00％ Z-C3 96.73％ C-D3 100.00％ Z-A4 86.04％ C-B4 86.43％ Z-C4 59.09％ C-D4 57.17％ Z-A5 87.33％ C-B5 22.73％ Z-C5 85.74％ C-D5 64.00％ Z-A6 47.64％ C-B6 66.67％ Z-C6 100.00％ C-D6 59.86％ Z-A7 92.50％ C-B7 95.99％ Z-C7 100.00％ C-D7 61.29％ Z-A8 72.73％ C-B8 63.64％ Z-C8 73.47％ C-D8 100.00％ Z-A9 97.73％ C-B9 45.38％ Z-C9 51.13％ C-D9 5.88％ Z-A10 92.45％ C-B10 67.86％ Z-C10 0.00％ C-D10 31.82％

[0136] According to the above matching calculation results, wells with a single well matching degree less than 50% are screened, and the correction method of the single well filter height is applied to retrieve the unit well group mining section data. The center height of the continuous mining section of the unit well group is averaged as the corrected filter height of the target well. The correction results are shown in the following table. The position correction of the single well filter with low matching degree is shown in Table 11.

[0137] Table 11

[0138]

[0139] (9) Correction of the filter length of the well affected by the mudstone layer: The original data without removing the mudstone layer was used to calculate the mudstone ratio of each single well filter section. It was calculated that the mudstone ratio of the filter section of 4 single wells was higher than 10%. The length of the filter was increased by 1 / 2 of the mudstone layer thickness at both ends of the filter, and the total length of the filter after the increase was used as the corrected filter length. The correction results of the 4 single wells are as follows:

[0140] The filter length correction for a single well with high mudstone ratio is shown in Table 12:

[0141] Table 12

[0142] well name Mudstone layer thickness Corrected filter length Filter Filter stop Z-A1 1.5 7.23 380.33 387.56 C-B1 0.6 6.33 385.94 392.27 C-B2 0.8 6.53 391.45 397.98 C-D1 0.6 6.33 391.35 398.08

[0143] After the design method of the present invention is used to design the filter in the mining area, the numerical simulation method is used to evaluate the design effect. The numerical simulation simulates the leaching effects of 8 sets of filter design schemes, including the technical scheme obtained by the design method of the present invention, the manual design scheme, and 6 unified design schemes with different filter lengths and relative positions. The designed filter lengths and filter positions are shown in the following table:

[0144] The eight numerical simulation filter design schemes are shown in Table 13 below:

[0145] Table 13

[0146]

[0147] like Figure 2 , Figure 3 and Figure 4 As shown in the figure, the effective impregnation range is an important indicator for evaluating the uranium leaching effect. This parameter represents the swept volume of the uranium leaching agent in the ore body. The effective impregnation volume of each scheme is quantitatively calculated. It can be seen that the effective impregnation volume of the ore section cutting scheme (design scheme of the present invention) performs best among the eight schemes. Its effective impregnation volume value has always been in the leading position within the simulation period. After 200 days, the impregnation effect is significantly better than that of other design schemes.

[0148] To this end, the present invention discloses a secondary well formation filter design method, which can quickly carry out integrated design of the well field according to the overall geophysical well data of the mining area, thereby saving manpower input and improving the filter design efficiency. The design method of regionalized coordinated design of the well field created by the present invention is more scientific and reasonable, ensuring the overall leaching effect of the well field. A fast and efficient well formation design method is established for the existing in-situ leaching uranium secondary well formation process, which rationally utilizes the large-scale geophysical data of the secondary well formation process, carries out integrated design of the regional well field, saves labor costs, improves the well formation design efficiency, and ensures the scientific and efficient well field design.

[0149] Embodiment 2:

[0150] This embodiment provides a secondary well filter design device, the device comprising:

[0151] An acquisition module, the acquisition module is used to acquire first information, the first information includes raw well logging data of each single well in the well site, the raw well logging data includes ore section location data, lithology and uranium ore grade;

[0152] a first screening module, the first screening module being used to screen the well logging data after removing the mudstone data in the first information according to the lithology;

[0153] A second screening module, the second screening module is used to screen out uranium ore data with uranium ore grade values ​​higher than a preset uranium ore grade threshold value from the well logging data to obtain high-grade uranium ore data;

[0154] A third screening module, the third screening module is used to screen the high-grade uranium ore data according to a preset screening condition to obtain a continuous and mining-worthy ore section for each single well;

[0155] A fourth screening module, the fourth screening module is used to screen out multi-segment mine single wells with two or more mine sections in the continuous and mining-worthy mine section, and extract the mine location data of the multi-segment mine single well and all its unit wells;

[0156] A judgment module, the judgment module is used to judge the main mining section in each of the multi-segment mine single wells according to the mine location data of the multi-segment mine single well and all its unit wells, and to take the single-segment mine single well itself which has only one mining section in the continuous mining section with mining value as the main mining section of the single-segment mine single well;

[0157] A calculation module is used to calculate the average value of the length of the mine section in the concentrated interval of the mine section length value of the well field according to the mine location data of the main mine section in the multi-section mine single well and the single-section mine single well, and use the average value as the design length of the filter.

[0158] It should be noted that, regarding the device in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment of the method, and will not be elaborated here.

[0159] Embodiment 3:

[0160] Corresponding to the above method embodiment, this embodiment also provides a secondary well formation filter design device. The secondary well formation filter design device described below and the secondary well formation filter design method described above can refer to each other.

[0161] Figure 5 FIG. 8 is a block diagram of a secondary well filter design device 800 according to an exemplary embodiment. Figure 5 As shown, the secondary well filter design device 800 may include: a processor 801 and a memory 802. The secondary well filter design device 800 may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0162] The processor 801 is used to control the overall operation of the secondary well filter design device 800 to complete all or part of the steps in the secondary well filter design method. The memory 802 is used to store various types of data to support the operation of the secondary well filter design device 800. These data may include, for example, instructions for any application or method operating on the secondary well filter design device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 803 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component can include a microphone, and the microphone is used to receive external audio signals. The received audio signal can be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules can be keyboards, mice, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the secondary well filter design device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 can include: Wi-Fi module, Bluetooth module, NFC module.

[0163] In an exemplary embodiment, the secondary well formation filter design device 800 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned secondary well formation filter design method.

[0164] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the secondary well filter design method described above are implemented. For example, the computer-readable storage medium may be the memory 802 including the program instructions, and the program instructions may be executed by the processor 801 of the secondary well filter design device 800 to complete the secondary well filter design method described above.

[0165] Embodiment 4:

[0166] Corresponding to the above method embodiment, a readable storage medium is also provided in this embodiment. The readable storage medium described below and the secondary well filter design method described above can refer to each other.

[0167] A readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the secondary well filter design method of the above method embodiment.

[0168] The readable storage medium may specifically be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or other readable storage medium that can store program codes.

[0169] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0170] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A secondary well filter design method, characterized in that: include: Acquire first information, wherein the first information includes original well logging data of each single well in the well site, wherein the original well logging data includes ore section location data, lithology, and uranium ore grade; Filtering the well logging data after removing the mudstone data from the first information according to the lithology; Screening out uranium ore data with uranium ore grade values ​​higher than a preset uranium ore grade threshold from the well logging data to obtain high-grade uranium ore data; Screening the high-grade uranium ore data according to preset screening conditions to obtain a continuous and mining-worthy ore section for each single well; Screening out multi-segment mine single wells with two or more mine sections in the continuous and mining-worthy mine section, and extracting the mine location data of the multi-segment mine single well and all its unit wells; Determine the main mining section in each of the multi-segment single mine wells according to the mine location data of the multi-segment single mine well and all its unit wells, and take the single-segment single mine well itself, which has only one mining section in the continuous mining section with mining value, as the main mining section of the single-segment single mine well; The average value of the length of the mine section in the concentrated interval of the well field mine section length value is calculated according to the mine location data of the main mine section in the multi-section mine single well and the single-section mine single well, and the average value is used as the design length of the filter.

2. The secondary well filter design method according to claim 1, characterized in that: The high-grade uranium ore data are screened according to the preset screening conditions to obtain continuous and mining-worthy ore sections for each single well, including: The preset screening conditions include a first screening condition, a second screening condition and a third screening condition. The first screening condition is used to determine whether the distance between the bottom depth of the upper mining section and the top depth of the lower mining section in each mining section of the single well satisfies less than or equal to 1m. The second screening condition is used to determine whether the total length of the continuous mining sections in the single well satisfies greater than or equal to 2m. The third screening condition is used to determine whether the ratio of the actual total length of all the mining sections in the single well to the total length of the continuous mining sections in the single well satisfies greater than 0.

7. When all the ore sections of the single well do not meet the first screening condition, extract the longest ore section in the single well as the continuous ore section, and judge whether the length of the continuous ore section meets the second screening condition, and if so, judge the continuous ore section as the continuous ore section with mining value; When there is only one mining section in the single well, the only mining section in the single well is taken as the continuous mining section, and whether the length of the continuous mining section meets the second screening condition is determined, and if so, the continuous mining section is determined to be the continuous mining section with mining value; When there is a situation that satisfies the first screening condition in each mining section of the single well, the previous mining section and the next mining section that meet this situation are taken as the continuous mining section. If the total length of the continuous mining section does not meet the second screening condition, the continuous mining section is judged to be a mining section with no mining value. If the total length of the continuous mining section meets the second screening condition, it is further judged whether the ratio of the actual total length of all the mining sections in the single well to the total length of the continuous mining section meets the third screening condition. If so, the continuous mining section is judged to be a mining section with mining value. Otherwise, the continuous mining section with the largest continuous length in the single well is first selected for superposition. The section of ore closest to the continuous ore section is obtained as a superimposed ore section, and the first screening condition, the second screening condition and the third screening condition are continued to be used to verify the superimposed ore section. If the first screening condition, the second screening condition and the third screening condition are met, the nearest section of ore is continued to be superimposed on the basis of the superimposed ore section until the first screening condition, the second screening condition and the third screening condition are no longer met. Finally, the starting and ending points of the ore section after the last superimposed ore section are returned to, and this is used as the continuous uranium ore section with mining value, wherein the total length of the continuous ore section is the difference between the bottom depth of the ore at the last section of the continuous ore section and the top depth of the ore at the first section of the continuous ore section.

3. The secondary well filter design method according to claim 2 is characterized in that: In the preset filtering conditions: The first screening condition is: The second screening condition is: The third screening condition is: in is the top depth of the n+1th layer mining section, is the bottom depth of the nth layer of the ore section, P is the actual thickness ratio of the uranium ore section in the continuous ore section thickness, T U总 is the total true thickness of the uranium ore section, T H总 is the total thickness of the continuous ore section, is the depth of the bottom of the i-th section of the mine, is the top depth of the i-th section mine, The depth of the bottom of the mine at the end of the continuous mining section. The top depth of the first section of the continuous mining section, N is the total number of continuous mining sections.

4. The secondary well filter design method according to claim 1, characterized in that: Determining the main mining section in each of the multi-section mine single wells according to the mine location data of the multi-section mine single well and all its unit wells includes: Obtaining the mine location data of the multi-section mine single well and all its unit wells, wherein the mine location data of the multi-section mine single well includes the mine section starting position and the mine section ending position of each mine section in the multi-section mine single well, and the mine location data of the unit well includes the mine section starting position and the mine section ending position of the unit well; Calculate the center depth of the mining section of the unit well according to the starting point position and the end point position of the mining section of the unit well, and calculate the average center depth of the mining section of all unit wells according to the center depth of the mining section of each unit well; Calculate the center depth of each section of the mine in the multi-section mine single shaft according to the starting point position and the end point position of each section of the mine in the multi-section mine single shaft; In the multi-section mine single well, the mine section whose center depth is closest to the average center depth of the mine section is screened out and used as the main mine section.

5. The secondary well filter design method according to claim 1, characterized in that: According to the mine location data of the main mine section in the multi-segment mine single well and the single-segment mine single well, the average value of the total length of the mine section in the concentrated interval of the well field mine section length value is calculated, including: Calculate the length of the main ore section in the multi-section mine single shaft according to the mine location data of the main ore section in the multi-section mine single shaft; Calculate the length of the main ore section in the single-stage mine and single well according to the mine location data of the main ore section in the single-stage mine and single well; Calculate the length standard deviation of each main ore section according to the length of the main ore section in the single well of the multi-stage mine and the length of the main ore section in the single well of the single-stage mine; If the standard deviation of the length does not exceed 1.2, the average value is calculated based on the lengths of all the main ore sections; If the length standard deviation exceeds 1.2, the lengths of all the main ore sections are sorted from small to large, and 10% of the data are screened out: The first data point in the sorting is taken as the starting point of 90% of the data points, the distance value between every two adjacent data points in the sorting is calculated, and it is iterated downward in sequence until the last data point is the end point of 90% of the data points, and the last data point that satisfies the minimum distance value between the beginning and the end of the data is taken as the end point, and it is determined whether the length standard deviation calculated based on 90% of the data points satisfies not exceeding 1.

2. If so, the length average value of 90% of the data points is taken as the average value. If not, the 10% data screening is repeated on the basis of 90% of the data points until the length standard deviation satisfies not exceeding 1.2, and the length average value calculated when it is satisfied is taken as the average value.

6. The secondary well filter design method according to claim 1 or 5, characterized in that: The design method further comprises: Extract the highest point of the starting point of the main ore section and the lowest point of the ending point of the main ore section in all the main ore sections; Iterate downwards through the filter of the designed length from the highest point of the starting point of the main ore section as the upper end position of the filter, increase the depth by 1m each iteration, and after the last iteration, the lower end position of the filter does not exceed the lowest point of the ending point of the main ore section, and calculate the total overlapping length of the overlapping parts of the filter and all the main ore sections in each iteration; According to the total overlapping length of the filter and all the main ore sections in each iteration, the number of iterations when the total overlapping length is maximum is extracted, and the upper and lower end positions of the filter at the number of iterations when the total overlapping length is maximum are obtained. The upper and lower end positions of the filter at the number of iterations when the total overlapping length is maximum are the filter height.

7. The secondary well filter design method according to claim 6, characterized in that: The design method further comprises: At the filter height, the ratio of the overlap value between the filter and the main ore section in each single well to the length of the main ore section is calculated, and the ratio is the ore section matching degree of the single well; According to the ore section matching degree of each single well, the single wells with ore section matching degree less than 50% are screened out, and the single wells with ore section matching degree less than 50% are taken as target single wells; Acquire the mining section data of each target single well unit well group; According to the mining section data of the unit well group, the average center height of the continuous and mining-worthy mining section in the unit well group is calculated, and the average center height is used as the center height of the filter of the target single well. According to the center height of the filter and the design length of the filter, the corrected filter height of each target single well is obtained.

8. The secondary well filter design method according to claim 7, characterized in that: The design method also includes modifying the design length of the filter, including: Calculate the length ratio of mudstone in the filter height corresponding to each single well according to the original well logging data of each single well; Screening out the single wells whose length accounts for more than 10%, and obtaining the mudstone thickness of the mudstone; The length value of 1 / 2 of the mudstone thickness is respectively added to both ends of the filter of the designed length to obtain a corrected filter design length.

9. The secondary well filter design method according to claim 5, characterized in that: The calculation formula of the standard deviation is: Where s is the standard deviation, x1, x2...x m The thickness of the main ore section of the 1st, 2nd....m sections, is the average thickness of all main ore sections, and m is the total number of the main ore sections.

10. The secondary well filter design method according to claim 1, characterized in that: The preset uranium grade threshold is a uranium grade column of 0.01%.

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