Calculation method, device and equipment of coal rock ash content and medium

Abstract

The invention discloses a coal rock ash content calculation method and device, equipment and a medium. The method comprises the following steps: firstly, acquiring X-ray diffraction experiment data of total rock minerals and X-ray element data of coal rock at a target position; obtaining the ash content mineral type of the coal rock according to the total rock mineral X diffraction experiment data; calculating the mass fraction of the ash content mineral type by using the mass fraction of the characteristic element in the ash content mineral and the X-ray element data; and finally, calculating the ash content data of the coal rock at the target position by using the mass fraction of the ash content mineral type and the ash content mineral composition. In the process, the X-ray element data of the coal rock at the target position can be obtained through an element logging instrument on a drilling site, then a series of element calculation is carried out according to the previously obtained X-ray diffraction experiment data of the whole rock mineral, and the ash content data of the coal rock at the target position can be obtained, so that the calculation method is simple, and the calculation efficiency is high. And the requirement on timeliness while drilling can be met.

Description

Technical Field

[0001] This application relates to the field of coalbed methane exploration and development technology, and in particular to a method, apparatus, equipment and medium for calculating coal ash content. Background Technology

[0002] Deep coalbed methane development has broad prospects. With advancements in engineering technology, the exploration depth of coalbed methane in my country has extended to approximately 3000 meters. As the intensity of coalbed methane exploration and development increases, a calculation-while-drilling method is needed to assess coal quality. Ash content is a crucial parameter for evaluating coal quality; it is the residue obtained after the complete combustion of coal under specified conditions. Ash is the residue remaining after the complete combustion of combustible matter in coal and the complex reactions of minerals in the coal, including decomposition and combination, at certain temperatures.

[0003] Therefore, existing technologies evaluate coal quality by testing its ash content. Generally, ash content testing follows GB / T 30732-2014, "Industrial Analysis Methods for Coal - Instrumental Method." This typically involves weighing a certain amount of test coal, heating it in a furnace to (815+10)℃ according to a prescribed procedure, and then ashing and burning it in air or oxygen until the mass is constant. The ash mass fraction is calculated based on the mass of the residue. However, because existing technologies require laboratory operation, they cannot provide real-time evaluation of coal quality at the drilling site, meaning they cannot plan the drilling trajectory, thus failing to meet the demands of drilling as it progresses. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, and medium for calculating the ash content of coal and rock. The ash content data of coal and rock in a block is calculated by using X-ray elemental data. Specifically, X-ray elemental data can be obtained on-site using an elemental logging instrument, and ash content data can be obtained through a series of calculations. This allows for on-site evaluation of coal and rock quality, meeting the needs of drilling progress.

[0005] In a first aspect, this application provides a method for calculating the ash content of coal and rock, the method comprising:

[0006] The X-ray elemental data of whole-rock mineral X-ray diffraction experiments and target-layer coal and rock were obtained. The X-ray elemental data were obtained by collecting raw data of target-layer coal and rock through element logging instruments. The whole-rock mineral X-ray diffraction experimental data were obtained by experimenting with explored coal and rock layers.

[0007] Based on whole-rock mineral X-ray diffraction experimental data, the ash mineral types of coal and rock were determined;

[0008] The mass fraction of ash mineral types is calculated using the mass fraction of characteristic elements in ash minerals and X-ray elemental data.

[0009] The ash content data of the target stratum coal and rock are calculated using the mass fraction of ash mineral types and the composition of ash minerals.

[0010] Optionally, the process of obtaining the mass fraction of characteristic elements in ash minerals includes:

[0011] The characteristic elements are determined based on the chemical formula of the ash mineral type;

[0012] Substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the element mass fraction formula yields the mass fraction of the characteristic element in the ash mineral.

[0013] Optionally, when the ash mineral type is clay mineral, the clay mineral is a mixed mineral composed of multiple clay mineral types. Before determining the characteristic elements based on the chemical formula of the ash mineral type, the method further includes:

[0014] Based on the X-ray diffraction experimental data of clay minerals, the proportion of various clay mineral types in the clay minerals was statistically obtained. The X-ray diffraction experimental data of clay minerals was obtained through experiments on coal and rock in the explored strata.

[0015] Substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the element mass fraction formula yields the mass fraction of the characteristic element in the ash mineral, including:

[0016] Based on various clay mineral types, the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type are substituted into the element mass fraction formula to obtain the mass fraction of multiple characteristic elements in the corresponding clay minerals.

[0017] The proportion of various clay mineral types in clay minerals is used as the weight of the characteristic element in the mass fraction of the corresponding clay mineral, and the mass fraction of the characteristic element in the clay mineral is calculated.

[0018] Optionally, the mass fraction of the ash mineral type can be calculated using the mass fraction of characteristic elements in the ash mineral and X-ray elemental data, including:

[0019] If the characteristic element is uniquely present in the target ash mineral type, then the formula for the first mineral mass fraction is determined;

[0020] Substituting the mass fraction of characteristic elements in the ash mineral and X-ray elemental data into the first mineral mass fraction formula, the mass fraction of the target ash mineral type is obtained. The first mineral mass fraction formula is as follows:

[0021] w(minerals) i ) = w(characteristic element) / αi

[0022] Among them, w (mineral) i ) represents the mass fraction of target ash mineral i; w(characteristic element) represents the mass content of characteristic elements in the X-ray elemental data; α i The mass fraction of the characteristic element in the chemical formula of the target ash mineral i.

[0023] Optionally, the mass fraction of the ash mineral type can be calculated using the mass fraction of characteristic elements in the ash mineral and X-ray elemental data, including:

[0024] If the characteristic element exists in ash mineral types other than the target ash mineral type, then the formula for the second mineral mass fraction is determined.

[0025] The mass fraction of characteristic elements in ash minerals, X-ray elemental data, and the mass fraction of ash mineral types other than the target ash mineral type are substituted into the second mineral mass fraction formula to obtain the mass fraction of the target ash mineral type. The second mineral mass fraction formula is as follows:

[0026] w(minerals) i ) = (w(characteristic element) - ∑w(mineral) j )×α j ) / α i

[0027] Among them, w (mineral) i ) represents the mass fraction of the target ash mineral type i; w(characteristic element) represents the mass content of the characteristic element in the X-ray elemental data; w(mineral) j α represents the mass fraction of ash mineral type j other than the target ash mineral type i; j The mass fraction of characteristic elements in the chemical formula of ash mineral type j; α i The characteristic element is the mass fraction of the target ash mineral i according to its chemical formula.

[0028] Optionally, the method further includes:

[0029] Based on the ash type classification standard and the ash content data of the target stratum coal and rock, the ash content of the target stratum coal and rock is classified.

[0030] Optionally, the method further includes:

[0031] Industrial composition analysis experiments were conducted on the coal and rock of the target stratum to obtain experimental ash content data;

[0032] The correlation coefficients were tested between the experimental ash data and the ash data of the target stratum coal and rock to obtain the correlation coefficients, which were then used to evaluate the ash data of the target stratum coal and rock.

[0033] Secondly, this application provides a device for calculating coal and rock ash content, the device comprising:

[0034] The acquisition unit is used to acquire whole-rock mineral X-ray diffraction experimental data and target-layer coal and rock X-ray elemental data. The X-ray elemental data is obtained by collecting raw data from the target-layer coal and rock using an element logging instrument, and the whole-rock mineral X-ray diffraction experimental data is obtained by testing the coal and rock of the explored layers.

[0035] The unit is used to obtain the ash mineral type of coal based on whole-rock mineral X-ray diffraction experimental data;

[0036] The calculation unit is used to calculate the mass fraction of ash mineral types using the mass fraction of characteristic elements in ash minerals and X-ray elemental data.

[0037] The calculation unit is also used to calculate the ash content data of the target stratum coal and rock using the mass fraction of ash mineral types and the composition of ash minerals.

[0038] Optionally, the obtaining unit is also used for:

[0039] Determine the characteristic elements based on the chemical formula of the ash mineral type;

[0040] Substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the element mass fraction formula yields the mass fraction of the characteristic element in the ash mineral.

[0041] Optionally, the device further includes:

[0042] The statistical unit is used to statistically determine the proportion of various clay mineral types in clay minerals based on clay mineral X-ray diffraction experimental data, wherein the clay mineral X-ray diffraction experimental data is obtained through experiments on coal and rock in the explored strata.

[0043] The unit is used to substitute the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type into the element mass fraction formula according to various clay mineral types to obtain the mass fraction of multiple characteristic elements in the corresponding clay minerals; and to calculate the mass fraction of the characteristic element in the clay mineral by using the proportion of multiple clay mineral types in the clay mineral as the weight of the mass fraction of the characteristic element in the corresponding clay mineral.

[0044] Optionally, when calculating the mass fraction of ash mineral types using the mass fraction of characteristic elements in ash minerals and X-ray elemental data, the calculation unit is specifically used for:

[0045] If the characteristic element is uniquely present in the target ash mineral type, then the formula for the first mineral mass fraction is determined;

[0046] Substituting the mass fraction of characteristic elements in the ash mineral and X-ray elemental data into the formula for the first mineral mass fraction, the mass fraction of the target ash mineral type is obtained. The formula for the first mineral mass fraction is as follows:

[0047] w(minerals) i ) = w(characteristic element) / α i

[0048] Among them, w (mineral) i ) represents the mass fraction of target ash mineral i; w(characteristic element) represents the mass content of characteristic elements in the X-ray elemental data; α i The mass fraction of the characteristic element in the chemical formula of the target ash mineral i.

[0049] Optionally, when calculating the mass fraction of ash mineral types using the mass fraction of characteristic elements in ash minerals and X-ray elemental data, the calculation unit is specifically used for:

[0050] If the characteristic element exists in ash mineral types other than the target ash mineral type, then the formula for the second mineral mass fraction is determined.

[0051] The mass fraction of characteristic elements in ash minerals, X-ray elemental data, and the mass fraction of ash mineral types other than the target ash mineral type are substituted into the formula for the second mineral mass fraction to obtain the mass fraction of the target ash mineral type. The formula for the second mineral mass fraction is as follows:

[0052] w(minerals) i ) = (w(characteristic element) - ∑w(mineral) j )×α j ) / α i

[0053] Among them, w (mineral) i ) represents the mass fraction of the target ash mineral type i; w(characteristic element) represents the mass content of the characteristic element in the X-ray elemental data; w(mineral) j α represents the mass fraction of ash mineral type j other than the target ash mineral type i; j The mass fraction of characteristic elements in the chemical formula of ash mineral type j; α i The characteristic element is the mass fraction of the target ash mineral i according to its chemical formula.

[0054] Optionally, the device further includes:

[0055] The division unit is used to classify the ash content of coal and rock in the target stratum according to the ash content classification standard and the ash content data of the coal and rock in the target stratum.

[0056] Optionally, the device further includes:

[0057] The evaluation unit is used to conduct industrial component analysis experiments on the target stratum coal and rock to obtain experimental ash content data; the correlation coefficient is tested between the experimental ash content data and the ash content data of the target stratum coal and rock to obtain the correlation coefficient, so as to evaluate the ash content data of the target stratum coal and rock based on the correlation coefficient.

[0058] Thirdly, this application provides an electronic device including a memory and a processor:

[0059] Memory is used to store computer programs;

[0060] The processor is used to execute the method provided in the first aspect above according to the computer program.

[0061] Fourthly, this application also provides a computer-readable storage medium for storing a computer program for performing the method provided in the first aspect above.

[0062] Therefore, this application has the following beneficial effects:

[0063] This application provides a method for calculating the ash content of coal. First, it acquires whole-rock mineral X-ray diffraction experimental data and X-ray elemental data of the target stratum coal. The X-ray elemental data is obtained from the raw data of the target stratum coal through elemental logging instruments, while the whole-rock mineral X-ray diffraction experimental data is obtained from experiments on already explored strata of coal. Based on the whole-rock mineral X-ray diffraction experimental data, the ash mineral type of the coal is determined. Then, using the mass fraction of characteristic elements in the ash minerals and the X-ray elemental data, the mass fraction of the ash mineral type is calculated. Finally, using the mass fraction of the ash mineral type and the ash mineral composition, the ash content data of the target stratum coal is calculated. In this process, X-ray elemental data of the target stratum coal can be obtained at the drilling site using elemental logging instruments. Then, based on the previously obtained whole-rock mineral X-ray diffraction experimental data, a series of elemental calculations are performed to obtain the ash content data of the target stratum coal. This method is not only simple but also meets the requirements of real-time drilling. Attached Figure Description

[0064] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0065] Figure 1 This is a flowchart illustrating a method for calculating coal and rock ash content in an embodiment of this application.

[0066] Figure 2 This is a flowchart illustrating one embodiment of a method for calculating coal and rock ash content in this application.

[0067] Figure 3 This is a scatter plot showing the relationship between calculated ash content data and experimental ash content data of coal and rock in the target stratum in a method for calculating coal and rock ash content according to an embodiment of this application.

[0068] Figure 4 This is a schematic diagram of the structure of a coal and rock ash content calculation device according to an embodiment of this application;

[0069] Figure 5 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0070] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0071] In the embodiments of this application, the word "first" in names such as "first mineral mass fraction formula" is only used as a name identifier and does not represent the first in order. This rule also applies to "second," "third," etc.

[0072] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0073] The following explains the technical terms used in the embodiments of this application:

[0074] Elemental logging: When high-energy X-rays bombard a sample, electrons are released from the atomic nucleus, creating electron vacancies. Electrons in high-energy states then transition to lower-energy states to fill these vacancies, releasing characteristic X-rays (X-ray fluorescence). When rock cuttings are irradiated with X-rays, they can be excited to emit characteristic X-rays (X-ray fluorescence) of various wavelengths. The mixed X-rays need to be separated by wavelength (or energy) and the intensity of different wavelengths (or energies) of X-rays measured separately for quantitative analysis. Currently, elemental logging primarily analyzes drilled rock cuttings to obtain the mass percentage data of major rock-forming elements in the rock. It is widely used in carbonate rocks, sandstone, mudstone, and other lithologies, effectively guiding lithological identification.

[0075] Characteristic element: A unique element that distinguishes a substance from others. For example, the basic amino acids that make up proteins, cysteine ​​(and cystine formed by the condensation of two cysteine ​​residues) and methionine, both contain sulfur, thus distinguishing them from other basic building blocks of life: nucleic acids, lipids, and carbohydrates. Therefore, sulfur is generally used as a characteristic element of proteins.

[0076] Currently, ash content is a crucial parameter for evaluating coal quality. Obtaining ash content indicates whether the coal is pure or impure. If, during drilling, the ash content changes from low to high, the horizontal drilling trajectory needs immediate adjustment to drill towards the lower ash content area, ensuring the horizontal section is drilled as close to the lowest ash location (where the coal quality is good) as possible. However, the current drilling time in the field is relatively fast, approximately 2-4 minutes per meter. Taking samples at the drilling site and bringing them back to the laboratory for ash content testing would take too long, failing to meet the needs of on-site coal quality evaluation.

[0077] In this embodiment, elemental logging tests are first conducted at the drilling site according to the required intervals for collecting core or cuttings samples to obtain X-ray elemental data of the target stratum coal. Then, using whole-rock mineral X-ray diffraction experimental data and X-ray elemental data of the explored strata coal, ash content data of the target stratum coal is obtained through a series of calculation methods. This allows for the evaluation of coal quality based on the ash content data, meeting the needs of coal quality evaluation at the drilling site. Specifically, this method may include: first, obtaining whole-rock mineral X-ray diffraction experimental data and X-ray elemental data of the target stratum coal, where the X-ray elemental data is the raw data obtained from the target stratum coal through elemental logging instruments, and the whole-rock mineral X-ray diffraction experimental data is obtained through experiments on the explored strata coal; second, obtaining the ash mineral type of the coal based on the whole-rock mineral X-ray diffraction experimental data; third, calculating the mass fraction of the ash mineral type using the mass fraction of characteristic elements in the ash minerals and the X-ray elemental data; and finally, calculating the ash content data of the target stratum coal using the mass fraction of the ash mineral type and the ash mineral composition.

[0078] As can be seen, the method provided in this application can obtain X-ray elemental data of coal and rock in the target stratum at the drilling site using elemental logging instruments. Then, based on the previously obtained whole-rock mineral X-ray diffraction experimental data, a series of elemental calculations can be performed to obtain the ash content data of coal and rock in the target stratum. The calculation method is not only simple, but also meets the requirements of timeliness while drilling.

[0079] To facilitate understanding of the specific implementation of the coal and rock ash content calculation method provided in the embodiments of this application, the following description will be provided in conjunction with the accompanying drawings.

[0080] It should be noted that the main body implementing the coal ash content calculation method can be the coal ash content calculation device provided in the embodiments of this application, which can be carried in an electronic device or a functional module of an electronic device. The electronic device in the embodiments of this application can be any device capable of implementing the coal ash content calculation method in the embodiments of this application, such as an Internet of Things (IoT) device.

[0081] Figure 1 This is a flowchart illustrating a method for calculating coal ash content according to an embodiment of this application. This method can be applied to a coal ash content calculation device, which may be, for example, a device for calculating coal ash content such as... Figure 4 The coal ash content calculation device 400 shown, or the coal ash content calculation device may also be integrated into... Figure 5 Functional modules in the electronic device 500 shown.

[0082] like Figure 1 As shown, the method includes the following steps S101 to S104:

[0083] S101: Obtain whole-rock mineral X-ray diffraction experimental data and X-ray elemental data of target stratum coal and rock. The X-ray elemental data is obtained by collecting raw data of target stratum coal and rock through an elemental logging instrument. The whole-rock mineral X-ray diffraction experimental data is obtained through experiments on explored stratum coal and rock.

[0084] To obtain the ash content data of the target stratum coal and rock, it is first necessary to acquire whole-rock mineral X-ray diffraction experimental data and X-ray elemental data of the target stratum coal and rock. Based on the whole-rock mineral X-ray diffraction experimental data, the ash mineral types of the coal and rock are determined. Based on the mass fraction of characteristic elements in the ash minerals and the X-ray elemental data, the mass fraction of the ash mineral type is calculated. Finally, based on the mass fraction of the ash mineral type and the ash mineral composition, the ash content data of the target stratum coal and rock is calculated. Therefore, in this embodiment, whole-rock mineral X-ray diffraction experimental data and X-ray elemental data are obtained through S101, providing basic data for subsequent calculations.

[0085] The aforementioned whole-rock mineral X-ray diffraction experimental data were collected through experiments on coal and rock layers that have already been drilled, while the X-ray elemental data were obtained from the raw data of the target coal and rock layers using elemental logging instruments. In this process, the embodiments of this application utilize elemental logging to obtain the corresponding X-ray elemental data of the target coal and rock layers in real time on-site, eliminating the need for industrial component testing experiments in a laboratory, thus meeting the requirements of drilling.

[0086] S102: Based on whole-rock mineral X-ray diffraction experimental data, the ash mineral types of coal and rock are obtained.

[0087] As an example, S102 may include: obtaining the ash mineral type of coal rock based on the characteristic peak values ​​of whole-rock mineral X-ray diffraction experimental data and the ash mineral type standard. In this process, because different substances have different X-ray diffraction characteristic peak values ​​(lattice type, cell size, number and position of atoms or molecules in the cell, etc.), and because different structural parameters result in different X-ray diffraction positions and intensities, different ash mineral compositions can be distinguished based on the whole-rock mineral X-ray diffraction experimental data and the ash mineral type standard, thereby obtaining the ash mineral type of coal rock.

[0088] S103: Calculate the mass fraction of ash mineral types using the mass fraction of characteristic elements in ash minerals and X-ray elemental data.

[0089] As an example, the process of obtaining the mass fraction of the characteristic element in the ash mineral in S103 may include: determining the characteristic element based on the chemical formula of the ash mineral type; substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the element mass fraction formula to obtain the mass fraction of the characteristic element in the ash mineral. The specific formula for the element mass fraction is as follows:

[0090] α = relative atomic mass of characteristic element × number of atoms of characteristic element / relative molecular mass of chemical formula of ash mineral type.

[0091] Since clay minerals are mixtures of various clay mineral types, when the ash mineral type is clay, it is first necessary to statistically determine the proportion of different clay mineral types in the clay mineral based on X-ray diffraction experimental data. This data was obtained from coal and rock samples from explored strata; for example, kaolinite accounts for 0.61%, illite 0.29%, chlorite 0.06%, and montmorillonite 0.04%. Then, based on the various clay mineral types, the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type are substituted into the element mass fraction formula to obtain multiple... The mass fraction of a characteristic element in a corresponding clay mineral is calculated. For example, to calculate the mass fraction of a characteristic element in kaolinite, where the chemical formula of kaolinite is Al4Si4O10(OH)8, if the characteristic element is Al, then α = 27 × 42 / 996 = 1.14. Finally, the mass fraction of the characteristic element in the clay mineral is calculated by using the proportion of various clay mineral types in the clay mineral as the weight of the mass fraction of the characteristic element in the corresponding clay mineral. For example, if the proportion of kaolinite is 61.2%, then 0.612 can be used as the weight of the mass fraction of Al in the chemical formula of kaolinite to calculate the mass fraction of the characteristic element in the clay mineral.

[0092] As an example, S103 may include: if the characteristic element is uniquely present in the target ash mineral type, then determining the first mineral mass fraction formula; substituting the mass fraction of the characteristic element in the ash mineral and the X-ray element data into the first mineral mass fraction formula to obtain the mass fraction of the target ash mineral type, wherein the first mineral mass fraction formula is as follows:

[0093] w(minerals) i ) = w(characteristic element) / α i

[0094] Among them, w (mineral) i ) represents the mass fraction of target ash mineral i; w(characteristic element) represents the mass content of characteristic elements in the X-ray elemental data; α i The mass fraction of characteristic element i in the chemical formula of target ash mineral i.

[0095] For example, if the target ash mineral type to be calculated is dolomite, and the chemical formula of dolomite is CaMg(CO3)2, with Mg as the characteristic element, then the mass content of Mg in the elemental logging can be obtained first from the X-ray elemental data. Since the mass fraction of Mg in dolomite has been obtained from the above steps, it can be directly substituted into the first mineral mass fraction formula to obtain the mass fraction of dolomite.

[0096] As an example, S103 may include: if the feature element exists in an ash mineral type other than the target ash mineral type, then determine the second mineral mass fraction formula;

[0097] The mass fraction of characteristic elements in ash minerals, X-ray elemental data, and the mass fraction of ash mineral types other than the target ash mineral type are substituted into the second mineral mass fraction formula to obtain the mass fraction of the target ash mineral type. The second mineral mass fraction formula is as follows:

[0098] w(minerals) i ) = (w(characteristic element) - ∑w(mineral) j )×α j ) / α i

[0099] Among them, w (mineral) i ) represents the mass fraction of the target ash mineral type i; w(characteristic element) represents the mass content of the characteristic element in the X-ray elemental data; w(mineral) j The mass fraction of ash mineral type j other than the target ash mineral type i; α j The mass fraction of characteristic element j in the chemical formula of ash mineral type j; α i The characteristic element is the mass fraction of the target ash mineral i according to its chemical formula.

[0100] In this process, since whole-rock mineral X-ray diffraction experimental data and clay mineral X-ray diffraction experimental data of the explored coal and rock layers have been obtained in advance, when it is necessary to calculate the ash content data of the target coal and rock layers, the X-ray elemental data obtained on site can be used. Since it is not possible to return to the laboratory for experiments, the calculation can be performed on site to obtain the mass fraction of ash mineral types.

[0101] S104: Calculate the ash content data of coal and rock in the target stratum using the mass fraction of ash mineral types and the composition of ash minerals.

[0102] As an example, S104 may include: summing the mass fractions of multiple ash mineral types according to the ash mineral composition, for example, using the following formula:

[0103] w(ash content) = ∑w(mineral content) i )

[0104] Where w(ash content) is the mass fraction of ash in the target stratum coal and rock; w(mineral content) is the mass fraction of ash in the target stratum coal and rock. i ) represents the mass fraction of target ash mineral type i.

[0105] In the above process, based on the ash mineral composition, the mass fractions of multiple ash mineral types obtained through a series of calculations can be added together to obtain the ash data of the target stratum coal and rock. In order to facilitate the subsequent evaluation of coal quality based on ash data, the ash data of the target stratum coal and rock can be expressed in the form of percentage.

[0106] In this embodiment of the application, in order to evaluate the quality of coal and rock, it is necessary to classify the ash content of coal and rock according to the ash content classification standard. The specific process may include: classifying the ash content of the target stratum coal and rock according to the ash content classification standard and the ash content data of the target stratum coal and rock. The specific ash content classification standard is shown in Table 1 below:

[0107] Table 1 Classification Standards for Coal Ash Types

[0108] Coal and rock ash types Ash content (%) Ultra-low ash coal ≤10 low ash coal (10,20] medium-gray coal (20,30] High-ash coal (30,40] Extra high gray coal (40,50]

[0109] As can be seen from the above, the ash content of coal is determined according to the ash content classification standard. Among them, ash content ≤10% is classified as ultra-low ash coal; ash content between 10% and 20% is classified as low ash coal; ash content between 20% and 30% is classified as medium ash coal; ash content between 30% and 40% is classified as high ash coal; and ash content between 40% and 50% is classified as ultra-high ash coal.

[0110] Therefore, by classifying coal and rock ash content as described above, the horizontal trajectory of the drilling can be adjusted according to the coal and rock ash content type, drilling towards locations with lower ash content, ensuring that the horizontal section is drilled as close as possible to locations with lower ash content (locations with better coal quality), and guaranteeing that coal and rock of good quality can be explored.

[0111] In addition, to verify the credibility of the method provided in the embodiments of this application, a correlation coefficient test can be performed with experimental data. The specific process may include: conducting industrial component analysis experiments on the target stratum coal and rock to obtain experimental ash data; performing a correlation coefficient test on the experimental ash data and the ash data of the target stratum coal and rock to obtain a correlation coefficient, so as to evaluate the ash data of the target stratum coal and rock based on the correlation coefficient, and thus determine the credibility of the method provided in the embodiments of this application.

[0112] As can be seen, the embodiments of this application first acquire whole-rock mineral X-ray diffraction experimental data and X-ray elemental data of the target stratum coal and rock. The X-ray elemental data is the raw data obtained from the target stratum coal and rock through elemental logging instruments, while the whole-rock mineral X-ray diffraction experimental data is obtained from experiments on the explored strata coal and rock. Based on the whole-rock mineral X-ray diffraction experimental data, the ash mineral type of the coal and rock is obtained. Then, using the mass fraction of characteristic elements in the ash minerals and the X-ray elemental data, the mass fraction of the ash mineral type is calculated. Finally, using the mass fraction of the ash mineral type and the ash mineral composition, the ash content data of the target stratum coal and rock is calculated. In this process, the X-ray elemental data of the target stratum coal and rock can be obtained at the drilling site using elemental logging instruments. Then, based on the previously obtained whole-rock mineral X-ray diffraction experimental data, a series of elemental calculations can be performed to obtain the ash content data of the target stratum coal and rock. This method is not only simple but also meets the requirements of real-time drilling.

[0113] To make the methods provided in the embodiments of this application clearer and easier to understand, the following is combined with... Figure 2 A specific example of this method will be used to illustrate the concept.

[0114] like Figure 2 As shown, this implementation may include, for example:

[0115] S201: Obtain whole-rock mineral X-ray diffraction experimental data, clay mineral X-ray diffraction analysis data, and X-ray elemental data of coal and rock in the target stratum.

[0116] Consistent with the above embodiments, the X-ray elemental data in S201 is the raw data obtained from the target stratum coal and rock through elemental logging instruments. The whole-rock mineral X-ray diffraction experimental data and clay mineral X-ray diffraction analysis data are obtained from the explored strata coal and rock. The X-ray elemental data of the target stratum coal and rock depends on the sampling density (number of samples) of the core or rock cuttings, and the calculation interval (number of calculated data) of the subsequent ash content data depends on the X-ray elemental data of the target stratum coal and rock. Therefore, the sampling density of the core or rock cuttings needs to be adjusted as needed.

[0117] S202: Based on whole-rock mineral X-ray diffraction experimental data, the ash mineral types of coal and rock are obtained.

[0118] In this embodiment of the application, based on the characteristic peak values ​​of the whole-rock mineral X-ray diffraction analysis experimental data (69 data points) of the Taiyuan Formation of Daniudi, the whole-rock mineral X-ray diffraction analysis data table shown in Table 2 can be obtained; among them, the ash mineral types include clay minerals, pyrite, calcite, dolomite, and quartz.

[0119] Table 2. X-ray diffraction analysis data of whole-rock minerals in coal No. 8 of the Taiyuan Formation.

[0120]

[0121] In this process, the analysis of the whole-rock mineral X-ray diffraction experimental data can be used to obtain the types of ash minerals contained therein, thus providing data for subsequent calculation of coal and rock ash content.

[0122] S203: Based on X-ray diffraction experimental data of clay minerals, the proportion of various clay mineral types in clay minerals was statistically obtained.

[0123] Since clay minerals in ash minerals are complex mixed minerals with multiple clay mineral types, it is necessary to statistically determine the proportion of each clay mineral type based on X-ray diffraction data. In this embodiment, based on X-ray diffraction data (6 types), the clay mineral types in the work area are statistically analyzed as follows: kaolinite 61.2%, illite-montmorillonite mixed layer 17.2% (of which montmorillonite / illite = 29.2%), illite 15.5%, and chlorite 6.1%. After converting the contents of montmorillonite and illite, the relative percentage contents of the four clay minerals are kaolinite 61.2%, illite 28.81%, chlorite 6.1%, and montmorillonite 3.89%. The specific X-ray diffraction analysis data of clay minerals are shown in Table 3 below.

[0124] Table 3 X-ray diffraction analysis data of clay minerals

[0125]

[0126]

[0127] S204: Determine the characteristic elements based on the chemical formula of the ash mineral type.

[0128] In the embodiments of this application, the determined ash mineral types are clay minerals, pyrite, calcite, dolomite, and quartz. That is, the clay minerals are mixed minerals. According to the molecular formulas of different clay minerals shown in Table 4 below, the characteristic element can be determined as Al, the chemical formula of pyrite is FeS2, the characteristic element is Fe, the chemical formula of calcite is CaCO3, the characteristic element is Ca, the chemical formula of dolomite is CaMg(CO3)2, the characteristic element is Mg, and the chemical formula of quartz is SiO2, the characteristic element is Si.

[0129] Table 4 Chemical formulas of different clay minerals

[0130] clay mineral types Chemical formula illite <![CDATA[KAl3Si3O 10 (OH)2]]> Montmorillonite <![CDATA[(Na,Ca) 0.33 (Al,Mg)2Si4O 10 (OH)2]]> Kaolinite <![CDATA[Al4Si4O 10 (OH)8]]> chlorite <![CDATA[(Mg,Fe)5Al(Si,Al)4O 10 (OH)8]]>

[0131] S205: Based on various clay mineral types, the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type are substituted into the element mass fraction formula to obtain the mass fraction of multiple characteristic elements in the corresponding clay mineral.

[0132] Since there are various types of clay minerals, a separate method is needed to calculate the mass fraction of characteristic elements in clay minerals. The specific process is as follows: first, calculate the chemical formula of illite; then, substitute the relative atomic mass of Al, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type into the element mass fraction formula, as shown in the above example, to calculate the mass fraction of Al in illite; and then calculate the mass fraction of Al in montmorillonite, kaolinite, and chlorite in sequence using the same method.

[0133] S206: The proportion of various clay mineral types in clay minerals is used as the weight of the characteristic element in the mass fraction of the corresponding clay mineral, and the mass fraction of the characteristic element in the clay mineral is calculated.

[0134] Based on the proportion of various clay mineral types obtained in S203, the weight of characteristic elements in the mass fraction of the corresponding clay minerals is used. For example, if kaolinite is 61.2%, illite is 28.81%, chlorite is 6.1%, and montmorillonite is 3.89%, then multiplying 61.2% by the mass fraction of Al in kaolinite, adding 28.81% by the mass fraction of Al in illite, adding 6.1% by the mass fraction of Al in chlorite, and adding 3.89% by the mass fraction of Al in montmorillonite, we finally obtain that the mass fraction of Al in the clay minerals is 22.80%.

[0135] S207: Determine whether the characteristic element is uniquely present in the target ash mineral type, wherein the target ash mineral type is not a clay mineral type.

[0136] Since the mass fraction of characteristic elements in clay minerals has already been calculated, subsequent calculations will be performed for other ash mineral types. It should be noted that a characteristic element may exist in one case only in the chemical formula of the target mineral but not in the chemical formulas of other minerals; conversely, it may exist in both the chemical formulas of the target mineral and other minerals. Different mineral mass fraction formulas are required for these two cases. Therefore, it is necessary to determine whether the characteristic element is uniquely present in the target ash mineral type. If the characteristic element is uniquely present in the target ash mineral type, then S208 is executed to determine the first mineral mass fraction formula, and calculations are performed according to the first mineral mass fraction formula. If the characteristic element exists in ash mineral types other than the target ash mineral type, then S209 is executed to determine the second mineral mass fraction formula, and calculations are performed according to the second mineral mass fraction formula.

[0137] S208: If the characteristic element is uniquely present in the target ash mineral type, then determine the mineral mass fraction formula 1, and substitute the mass fraction of the characteristic element in the ash mineral and the X-ray element data into the mineral mass fraction formula 1 to obtain the mass fraction of the target ash mineral type.

[0138] In this embodiment, the characteristic element Mg is uniquely present in dolomite. Therefore, the mineral mass fraction formula 1 can be determined. The mass content of Mg in the elemental logging and the mass fraction of Mg in dolomite are substituted into the mineral mass fraction formula 1 to obtain the mass fraction of dolomite. The mass content of Mg in the elemental logging can be obtained from the coal and petrological element data table shown in Table 5. The mass fraction of Mg in dolomite, obtained from the above elemental mass fraction formula, is 13%. Therefore, the specific formula for calculating the mass fraction of dolomite is, for example: w(dolomite) = w(Mg) / α Mg = w(Mg) / 13%. Wherein, the mineral mass fraction formula 1 can be, for example, the first mineral mass fraction formula mentioned above.

[0139] Similarly, the characteristic element Al is uniquely present in clay minerals, therefore, the mineral mass fraction formula 1 can be determined. Substituting the mass content of Al in the elemental logging and the mass fraction of Al in the clay minerals into the mineral mass fraction formula 1 yields the mass fraction of the clay minerals. The mass content of Al in the elemental logging can be obtained from the coal petrographic element data table shown in Table 5. The mass fraction of Al in the clay minerals is 22.80% obtained from S206. Therefore, the specific formula for calculating the mass fraction of clay minerals is, for example: w(clay minerals) = w(Al) / α Al= w(Al) / 22.8%.

[0140] Table 5 Target Coal Petrographic Element Data

[0141]

[0142]

[0143] S209: If the characteristic element exists in ash mineral types other than the target ash mineral type, then determine the mineral mass fraction formula 2, and substitute the mass fraction of the characteristic element in the ash mineral, the X-ray element data, and the mass fraction of the ash minerals other than the target ash mineral type into the mineral mass fraction formula 2 to obtain the mass fraction of the target ash mineral type.

[0144] In this embodiment, the characteristic element Ca is present not only in calcite but also in dolomite. Therefore, the mineral mass fraction formula 2 can be determined. The mass content of Ca in the elemental logging, the mass fraction of Ca in calcite, the mass fraction of Ca in dolomite, and the mass fraction of dolomite are substituted into the mineral mass fraction formula 2 to obtain the mass fraction of calcite. The mass content of Ca in the elemental logging can be obtained from the coal and petrological element data table shown in Table 5. The mass fraction of Ca in calcite obtained from the above elemental mass fraction formula is 40%, and the mass fraction of Ca in dolomite obtained from the above elemental mass fraction formula is 21.7%. Therefore, the specific formula for calculating the mass fraction of dolomite is, for example: w(calcite) = (w(Ca) - w(dolomite) × 21.7%) / α Ca = (w(Ca) - w(dolomite) × 21.7%) / 40%. Wherein, mineral content formula 2 can be, for example, the second mineral content formula mentioned above.

[0145] Similarly, the characteristic element Si is not only present in quartz but also in clay minerals. Therefore, the mineral mass fraction formula 2 can be determined. Substituting the mass content of Si in the elemental logging, the mass fraction of Si in quartz, the mass fraction of Si in clay minerals, and the mass fraction of clay minerals into the mineral mass fraction formula 2, the mass fraction of quartz is obtained. The mass content of Si in the elemental logging can be obtained from the coal and petrological element data table shown in Table 5. The mass fraction of Si in quartz obtained from the above elemental mass fraction formula is 37.5%, and the mass fraction of Si in clay minerals obtained from the above elemental mass fraction formula is 24.25%. Therefore, the specific formula for calculating the quartz mass fraction in this embodiment is, for example: w(quartz) = (w(Si) - w(clay minerals) × 24.25%) / α Si = (w(Si) - w(clay minerals) × 24.25%) / 37.5%.

[0146] Similarly, the characteristic element Fe is not only present in pyrite but also in clay minerals. Therefore, the mineral mass fraction formula 2 can be determined. Substituting the Fe mass content in the elemental logging, the Fe mass fraction in pyrite, the Fe mass fraction in clay minerals, and the clay mineral mass fraction into the mineral mass fraction formula 2, the mass fraction of pyrite is obtained. The Fe mass content in the elemental logging can be obtained from the coal and petrological element data table shown in Table 5. The Fe mass fraction in pyrite, obtained from the above elemental mass fraction formula, is 1.35%, and the Fe mass fraction in clay minerals, obtained from the above elemental mass fraction formula, is 46.7%. Therefore, the specific formula for calculating the pyrite mass fraction in this embodiment is, for example: w(pyrite) = (w(Fe) - w(clay minerals) × 1.35%) / α Fe = (w(Fe) - w(clay minerals) × 1.35%) / 46.7%.

[0147] S210: Calculate the ash content data of the target stratum coal and rock based on the mass fraction of ash mineral types and the composition of ash minerals.

[0148] The mass fractions of ash mineral types calculated according to S208 and S209 are shown in Table 6 below. Finally, the mass fractions of multiple ash mineral types need to be added together based on the ash mineral composition. Therefore, the specific formula for calculating the ash content data of the target stratum coal and rock in this embodiment can be, for example: w(ash) = w(clay minerals) + w(quartz) + w(calcite) + w(dolomite) + w(pyrite). The specific ash content data of the target stratum coal and rock obtained are shown in Table 7 below.

[0149] Table 6 Calculation data for target coal and petrological minerals

[0150]

[0151] Table 7 Calculation data of target coal and rock ash content

[0152]

[0153]

[0154] In this process, the embodiments of this application do not require operation in the laboratory. The ash mass fraction of coal and rock in the target stratum can be obtained on-site through a series of calculations from S201 to S210. Moreover, the calculation method is simple and can be applied to the drilling site.

[0155] S211: Based on the ash type classification standard and the ash content data of the target stratum coal and rock, classify the ash content of the target stratum coal and rock into different types.

[0156] To ensure that subsequent drilling trajectories are made in low-ash (high-quality coal) locations, it is necessary to evaluate the quality of the target coal and rock formation, specifically by classifying the ash content of the target coal and rock. The ash content classification criteria in this embodiment are as shown in the ash content classification criteria in the above embodiments. Therefore, based on the ash content data obtained in Table 7, the ash content types are shown in Table 8.

[0157] Table 8 Classification of Target Coal Ash Content

[0158]

[0159]

[0160] In this process, the embodiments of this application obtained the type of ash content of the coal and rock in the target stratum, that is, evaluated the coal quality of the coal and rock in the target stratum, which can meet the requirements of timeliness during drilling.

[0161] S212: Conduct industrial component analysis experiments on the target stratum coal and rock to obtain experimental ash content data, and perform correlation coefficient tests on the experimental ash content data and the ash content data of the target stratum coal and rock to obtain the correlation coefficient, so as to evaluate the ash content data of the target stratum coal and rock based on the correlation coefficient.

[0162] To ensure the accuracy of the ash content data of the target stratum coal and rock obtained on-site in this embodiment, it can be compared with experimental ash content data. The experimental ash content data is obtained from industrial component analysis experiments on the target stratum coal and rock, and the specific values ​​are shown in Table 9 below. The comparison method is to perform a correlation coefficient test between the experimental ash content data and the ash content data of the target stratum coal and rock, that is, to perform a correlation coefficient test between the data in Table 7 and the data in Table 9. Figure 3 The final R obtained as shown 2 =0.77, indicating that the method provided in the embodiments of this application has high reliability.

[0163] Table 9 Experimental data of target coal rock industrial components

[0164]

[0165]

[0166] This embodiment provides a method for calculating coal ash content. X-ray elemental data is collected at the drilling site using elemental logging instruments. Based on a series of calculations using whole-rock mineral X-ray diffraction experimental data and clay mineral X-ray diffraction analysis data, the ash mass fraction of the target stratum can be obtained. Furthermore, the ash mass fraction of the target stratum is classified according to the coal ash type classification standard, allowing the determination of the coal ash type at various well depths within the target stratum. This enables continued drilling operations based on the type. This process is not only simple in calculation but also meets the requirements for real-time drilling. Moreover, the method provided in this embodiment represents an innovative combination of elemental logging technology and coal quality evaluation. Furthermore, analysis and comparison with experimental data show that the calculation method provided in this embodiment has high reliability.

[0167] See Figure 4 This application provides a coal ash content calculation device 400, which includes:

[0168] The acquisition unit 401 is used to acquire whole-rock mineral X-ray diffraction experimental data and target-layer coal and rock X-ray elemental data. The X-ray elemental data is obtained by collecting raw data of target-layer coal and rock through an element logging instrument, and the whole-rock mineral X-ray diffraction experimental data is obtained by experimentally exploring coal and rock in the layer.

[0169] Unit 402 is used to obtain the ash mineral type of coal based on whole-rock mineral X-ray diffraction experimental data;

[0170] The calculation unit 403 is used to calculate the mass fraction of the ash mineral type based on the mass fraction of characteristic elements in the ash mineral and X-ray element data.

[0171] The calculation unit 403 is also used to calculate the ash content data of the target stratum coal and rock based on the mass fraction of the ash mineral type and the ash mineral composition.

[0172] Optionally, the receiving unit 402 is also used for:

[0173] Determine the characteristic elements based on the chemical formula of the ash mineral type;

[0174] Substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the element mass fraction formula yields the mass fraction of the characteristic element in the ash mineral.

[0175] Optionally, the device 400 further includes:

[0176] The statistical unit is used to statistically determine the proportion of various clay mineral types in clay minerals based on clay mineral X-ray diffraction experimental data, wherein the clay mineral X-ray diffraction experimental data is obtained through experiments on coal and rock in the explored strata.

[0177] The obtaining unit 402 is used to substitute the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type into the element mass fraction formula according to multiple clay mineral types to obtain the mass fraction of multiple characteristic elements in the corresponding clay minerals; and to calculate the mass fraction of the characteristic element in the clay minerals by using the proportion of multiple clay mineral types in the clay minerals as the weight of the mass fraction of the characteristic element in the corresponding clay minerals.

[0178] Optionally, when calculating the mass fraction of ash mineral types based on the mass fraction of characteristic elements in ash minerals and X-ray elemental data, the calculation unit 403 is specifically used for:

[0179] If the characteristic element is uniquely present in the target ash mineral type, then the formula for the first mineral mass fraction is determined;

[0180] Substituting the mass fraction of characteristic elements in the ash mineral and X-ray elemental data into the formula for the first mineral mass fraction, the mass fraction of the target ash mineral type is obtained. The formula for the first mineral mass fraction is as follows:

[0181] w(minerals) i ) = w(characteristic element) / α i

[0182] Among them, w (mineral) i ) represents the mass fraction of target ash mineral i; w(characteristic element) represents the mass content of characteristic elements in the X-ray elemental data; α i The mass fraction of the characteristic element in the chemical formula of the target ash mineral i.

[0183] Optionally, when calculating the mass fraction of ash mineral types based on the mass fraction of characteristic elements in ash minerals and X-ray elemental data, the calculation unit 403 is specifically used for:

[0184] If the characteristic element exists in ash mineral types other than the target ash mineral type, then the formula for the second mineral mass fraction is determined.

[0185] The mass fraction of characteristic elements in ash minerals, X-ray elemental data, and the mass fraction of ash mineral types other than the target ash mineral type are substituted into the formula for the second mineral mass fraction to obtain the mass fraction of the target ash mineral type. The formula for the second mineral mass fraction is as follows:

[0186] w(minerals) i ) = (w(characteristic element) - ∑w(mineral) j )×α j ) / α i

[0187] Among them, w (mineral) i ) represents the mass fraction of the target ash mineral type i; w(characteristic element) represents the mass content of the characteristic element in the X-ray elemental data; w(mineral) j α represents the mass fraction of ash mineral type j other than the target ash mineral type i; j The mass fraction of characteristic elements in the chemical formula of ash mineral type j; α i The characteristic element is the mass fraction of the target ash mineral i according to its chemical formula.

[0188] Optionally, the device 400 further includes:

[0189] The division unit is used to classify the ash content of coal and rock in the target stratum according to the ash content classification standard and the ash content data of the coal and rock in the target stratum.

[0190] Optionally, the device 400 further includes:

[0191] The evaluation unit is used to conduct industrial component analysis experiments on the target stratum coal and rock to obtain experimental ash content data; the correlation coefficient is tested between the experimental ash content data and the ash content data of the target stratum coal and rock to obtain the correlation coefficient, so as to evaluate the ash content data of the target stratum coal and rock based on the correlation coefficient.

[0192] It should be noted that the specific implementation method and the achieved effect of the coal and rock ash content calculation device 400 can be found in the above. Figure 1 or Figure 2 The relevant descriptions in the provided methods will not be repeated here.

[0193] This application also provides an electronic device 500, such as... Figure 5 As shown, the device 500 includes a memory 501 and a processor 502:

[0194] Memory 501 is used to store computer programs;

[0195] Processor 502 is used to execute the above according to the computer program. Figure 1 or Figure 2 The methods provided.

[0196] In addition, this application also provides a computer-readable storage medium for storing a computer program, the computer program being executed. Figure 1 or Figure 2 The methods provided.

[0197] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the methods of the above embodiments can be implemented by means of software plus a general-purpose hardware platform. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as a read-only memory (ROM) / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0198] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The device embodiments described above are merely illustrative. Modules described as separate components may or may not be physically separate. Components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the objectives of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0199] The above description is merely an exemplary implementation of this application and is not intended to limit the scope of protection of this application.

Claims

1. A method for calculating coal and rock ash content, characterized in that, The method includes: The X-ray elemental data of whole-rock mineral X-ray diffraction experiments and target-layer coal and rock were obtained. The X-ray elemental data were obtained by collecting the raw data of the target-layer coal and rock through an element logging instrument. The whole-rock mineral X-ray diffraction experimental data were obtained by experimenting with the coal and rock of the explored layers. Based on the whole-rock mineral X-ray diffraction experimental data, the ash mineral types of the coal rock were obtained; The mass fraction of the ash mineral type is calculated using the mass fraction of characteristic elements in the ash mineral and the X-ray elemental data. The ash content data of the target stratum coal and rock are calculated using the mass fraction and composition of the ash mineral types.

2. The method according to claim 1, characterized in that, The process of obtaining the mass fraction of the characteristic element in the ash mineral includes: The characteristic elements are determined based on the chemical formula of the ash mineral type; Substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the element mass fraction formula, the mass fraction of the characteristic element in the ash mineral is obtained.

3. The method according to claim 2, characterized in that, When the ash mineral type is a clay mineral, and the clay mineral is a mixed mineral composed of multiple clay mineral types, the step of determining the characteristic element based on the chemical formula of the ash mineral type further includes: Based on the X-ray diffraction experimental data of clay minerals, the proportion of various clay mineral types in the clay minerals was statistically obtained. The X-ray diffraction experimental data of clay minerals was obtained through experiments on coal and rock in the explored strata. The step of substituting the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the ash mineral type into the elemental mass fraction formula to obtain the mass fraction of the characteristic element in the ash mineral includes: Based on various clay mineral types, the relative atomic mass of the characteristic element, the number of atoms of the characteristic element, and the relative molecular mass of the chemical formula of the clay mineral type are substituted into the element mass fraction formula to obtain the mass fraction of the characteristic element in the corresponding clay mineral. The proportion of various clay mineral types in the clay mineral is used as the weight of the characteristic element in the corresponding clay mineral's mass fraction, and the mass fraction of the characteristic element in the clay mineral is calculated.

4. The method according to claim 1, characterized in that, The calculation of the mass fraction of the ash mineral type using the mass fraction of characteristic elements in the ash mineral and the X-ray elemental data includes: If the characteristic element is uniquely present in the target ash mineral type, then the formula for the first mineral mass fraction is determined; Substituting the mass fraction of the characteristic element in the ash mineral and the X-ray element data into the first mineral mass fraction formula, the mass fraction of the target ash mineral type is obtained. The first mineral mass fraction formula is as follows: w (mineral i ) = w (characteristic element) / a i Among them, w (mineral) i ) represents the mass fraction of target ash mineral i; w(characteristic element) represents the mass content of characteristic elements in the X-ray elemental data; α i The mass fraction of the characteristic element in the chemical formula of the target ash mineral i.

5. The method according to claim 1, characterized in that, The calculation of the mass fraction of ash mineral type using the mass fraction of the characteristic elements in the ash mineral and the X-ray elemental data includes: If the characteristic element exists in ash mineral types other than the target ash mineral type, then the formula for the second mineral mass fraction is determined. The mass fraction of the characteristic element in the ash mineral, the X-ray elemental data, and the mass fraction of the ash mineral types other than the target ash mineral type are substituted into the second mineral mass fraction formula to obtain the mass fraction of the target ash mineral type. The second mineral mass fraction formula is as follows: w(minerals) i )=(w(characteristic element)-∑w(mineral) j )×α j ) / α i Among them, w (mineral) i ) represents the mass fraction of the target ash mineral type i; w(characteristic element) represents the mass content of the characteristic element in the X-ray elemental data; w(mineral) j α represents the mass fraction of ash mineral type j other than the target ash mineral type i; j The mass fraction of characteristic elements in the chemical formula of ash mineral type j; α i The characteristic element is the mass fraction of the target ash mineral i according to its chemical formula.

6. The method according to claim 1, characterized in that, The method further includes: Based on the ash type classification standard and the ash content data of the target stratum coal and rock, the ash content of the target stratum coal and rock is classified.

7. The method according to claim 1, characterized in that, The method further includes: Industrial component analysis experiments were conducted on the coal and rock in the target stratum to obtain experimental ash content data; The experimental ash data and the ash data of the target stratum coal and rock are subjected to correlation coefficient test to obtain the correlation coefficient, so as to evaluate the ash data of the target stratum coal and rock based on the correlation coefficient.

8. A device for calculating the ash content of coal and rock, characterized in that, The method includes: The acquisition unit is used to acquire whole-rock mineral X-ray diffraction experimental data and target-layer coal and rock X-ray elemental data. The X-ray elemental data is obtained by collecting the raw data of the target-layer coal and rock through an element logging instrument, and the whole-rock mineral X-ray diffraction experimental data is obtained by experimentally exploring coal and rock in the layer. The obtaining unit is used to obtain the ash mineral type of coal based on the whole-rock mineral X-ray diffraction experimental data; The calculation unit is used to calculate the mass fraction of the ash mineral type using the mass fraction of characteristic elements in the ash mineral and the X-ray element data; The calculation unit is also used to calculate the ash content data of the target stratum coal and rock using the mass fraction and composition of the ash mineral type.

9. An electronic device, characterized in that, The device includes a memory and a processor, the processor being configured to execute a program stored in the memory, performing the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program for performing the method according to any one of claims 1-7.

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