Rapid coal rock component analysis method and device

Abstract

The invention provides a coal rock component calculation method and device. The method comprises the following steps: acquiring a coal rock sample to be analyzed; measuring the sample through an X-ray fluorescence spectrophotometer, and determining the elemental composition and content of the coal rock; performing element and mineral correlation analysis according to the coal rock sedimentary environment, and determining the occurrence characteristics of each element in the inorganic mineral components of the coal rock; and based on the occurrence characteristics of the elements in the inorganic mineral components of the coal rock, performing mineral inversion calculation to obtain the coal rock components. By utilizing the scheme of the invention, the requirements of field production on real-time analysis and evaluation of coal rock can be met.

Description

Technical Field

[0001] This invention relates to the field of coal and rock (gas) exploration and development technology, specifically to a rapid coal and rock component analysis method and apparatus. Background Technology

[0002] Coal petrographic composition is a key parameter for determining coal petrographic type, analyzing coal petrographic characteristics, and analyzing their sedimentary environment. Coal petrography typically consists of inorganic and organic components. The organic components of coal petrography originate from various fibrous tissues of coal-forming plants and are an important part of the organic matter in coal, belonging to amorphous materials. The inorganic components of coal petrography are mainly composed of various types of minerals. Based on their origin, they can be divided into primary minerals, syngenetic minerals, and epigenetic minerals. Primary minerals are mainly minerals formed by the combination of inorganic elements contained in the original coal-forming plants and organic matter in the coal, and are generally present in low amounts. Syngenetic minerals are one of the important sources of inorganic components in coal. They include clastic materials that entered the coal-forming peat bogs under geological conditions, including illite, kaolinite, quartz, and feldspar; as well as chemically formed minerals such as pyrite and siderite formed during the precipitation of colloidal solutions. Epigenetic minerals are sedimentary materials (such as carbonate minerals) formed during the coalification stage due to groundwater activity or changes in physicochemical conditions. They are often found in the cleavage and fractures of coal.

[0003] Currently, XRD (X-ray diffraction) is mainly used to analyze the type and content of rock minerals. However, since the organic components of coal and rocks are amorphous, XRD cannot measure the organic matter content; it can only measure the relative percentage content of minerals. Coal and rock component analysis is usually conducted in the laboratory, where researchers rely on advanced polarizing microscopes to statistically analyze the percentage content of organic and inorganic mineral components in coal and rocks using a point-counting method. However, in recent years, with the large-scale development of horizontal coal (gas) wells, "real-time analysis of coal and rock components, evaluation of coal and rock quality, and timely adjustment of wellbore trajectory" have become the main technical methods for coal (gas) development. Clearly, conventional laboratory analysis can no longer meet the needs of real-time, rapid, and efficient analysis in the field. There is an urgent need for a rapid coal and rock component analysis method based on field production to meet the requirements of real-time coal and rock analysis and evaluation. Summary of the Invention

[0004] This invention provides a rapid coal and rock composition analysis method and apparatus to meet the needs of on-site production for real-time analysis and evaluation of coal and rock.

[0005] Therefore, the present invention provides the following technical solution:

[0006] A method for calculating coal petrographic components, the method comprising:

[0007] Obtain coal and rock samples to be analyzed;

[0008] The elemental composition and content of the coal and rock were determined by measuring the sample using X-ray fluorescence spectrometry.

[0009] Based on the coal sedimentary environment, the correlation analysis between elements and minerals was conducted to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal.

[0010] Based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock, mineral inversion calculations are performed to obtain the coal and rock components.

[0011] Optionally, the elements of the coal rock measured by X-ray fluorescence spectrometry are oxides, and the oxides include any one or more of the following: FeO, SO3.

[0012] Optionally, the step of performing elemental and mineral correlation analysis based on the coal sedimentary environment to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal includes:

[0013] Determine the characteristics of coal petrographic components;

[0014] The occurrence characteristics of the element in the inorganic mineral components of the coal and rock are determined based on the characteristics of the coal and rock composition.

[0015] Optionally, the mineral inversion calculation includes:

[0016] Calculate the inorganic mineral content in the coal and rock;

[0017] The organic components in the coal and rock are calculated based on the inorganic mineral content.

[0018] Optionally, the calculation of the inorganic mineral content in the coal rock includes: sequentially calculating the content of the following components in the coal rock: pyrite, organic sulfur, siderite, calcium carbonate, potassium feldspar, clay, and quartz.

[0019] Optionally, calculating the pyrite content includes:

[0020] The FeO content measured by X-ray fluorescence spectrometry is converted into Fe content, and SO3 is converted into S content. The S / Fe ratio is then calculated.

[0021] If the S / Fe value is greater than the set value, the pyrite content is calculated based on the Fe content; otherwise, the pyrite content is calculated based on the S content.

[0022] Optionally, the setting value is 1.143.

[0023] Optionally, the pyrite content calculated based on the Fe content is: W 黄铁矿 =120×(W) Fe -W 铁背景值 ) / 56;

[0024] The pyrite content calculated based on the S content is: W 黄铁矿 =120×W s / 64.

[0025] Optionally, the method further includes:

[0026] The organic mineral composition of the coal rock was determined by laboratory analysis of another sample.

[0027] The correction factor is determined based on the organic mineral composition of the coal and rock.

[0028] The calculated organic and inorganic mineral contents are corrected using the aforementioned correction coefficients.

[0029] A coal and petrographic composition calculation device, the device comprising:

[0030] The sampling module is used to acquire coal and rock samples to be analyzed.

[0031] The measurement module is used to measure the sample using an X-ray fluorescence spectrometer to determine the elemental composition and content of the coal and rock.

[0032] The correlation analysis module is used to perform element-mineral correlation analysis based on the coal sedimentary environment to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal.

[0033] The calculation module is used to perform mineral inversion calculations based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock to obtain the coal and rock components.

[0034] Optionally, the device further includes a correction module for correcting the organic component and inorganic mineral content calculated by the calculation module using correction coefficients determined by laboratory analysis.

[0035] A computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to perform the steps of the coal and rock composition calculation method.

[0036] The rapid coal and rock composition analysis method and apparatus provided by this invention divides the coal and rock sample to be analyzed into two parts. One part of the sample is measured using X-ray fluorescence spectrometry to determine the elemental composition and content of the coal and rock. The other part of the sample is analyzed in the laboratory to determine the organic mineral components of the coal and rock. Then, based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock, mineral inversion calculations are performed to obtain the coal and rock composition. This enables real-time coal and rock composition analysis while drilling in the field, providing effective technical support for coal and rock type identification, evaluation, and tracking of dominant coal and rock reservoirs. It overcomes the problems of long time consumption and poor timeliness in laboratory coal and rock composition analysis, and meets the needs of real-time and efficient analysis of coal and rock composition in the field. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of a rapid coal and rock composition analysis method provided by the present invention;

[0039] Figure 2 This is a schematic diagram illustrating the correlation between illite and potassium feldspar in an embodiment of the present invention;

[0040] Figure 3 This is another flowchart of the rapid coal and rock composition analysis method provided by the present invention;

[0041] Figure 4 This is a schematic diagram of a coal and rock sampling point in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram illustrating the content of organic and inorganic components in coal and rock in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of a rapid coal and rock composition analysis device provided by the present invention;

[0044] Figure 7 This is another structural schematic diagram of the rapid coal and rock composition analysis device provided by the present invention. Detailed Implementation

[0045] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0047] To address the problem that conventional laboratory analysis cannot meet the needs of real-time, rapid, and efficient on-site analysis, this invention provides a rapid coal and petrographic component analysis method and apparatus. By combining laboratory and on-site methods, it utilizes the inorganic and organic components of coal and petrographic data established based on elemental logging parameters, and analyzes the elemental composition and content of the same group of coal and petrographic samples on-site using X-ray fluorescence spectroscopy. Based on the occurrence characteristics of the elements in the inorganic mineral components of coal and petrographic data, mineral inversion calculations are performed to obtain the coal and petrographic components.

[0048] like Figure 1 The diagram shown is a flowchart of a rapid coal and petrographic component analysis method provided by the present invention, which includes the following steps:

[0049] Step 101: Obtain the coal and rock sample to be analyzed.

[0050] Step 102: The elemental composition and content of the coal and rock are determined by measuring the sample using an X-ray fluorescence spectrometer.

[0051] The elements of the coal and rock measured by X-ray fluorescence spectrometry are mainly oxides, which may include any one or more of the following: FeO, SO3.

[0052] Step 103: Perform element-mineral correlation analysis based on the coal sedimentary environment to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal.

[0053] Specifically, the elemental composition of coal and petrified samples can be obtained by measuring them with X-ray fluorescence spectrometry; and the content of inorganic mineral components in coal and petrified samples at the same well depth can be obtained by laboratory analysis. Pearson correlation coefficient analysis is used to conduct correlation analysis between major elements and minerals, establishing a correlation matrix table between major elements and minerals. If the correlation coefficient of a certain element in a certain mineral is greater than 0.5, it indicates that the element is mainly present in that mineral.

[0054] The occurrence characteristics refer to the form and phase of a substance in a specific environment. In the field of minerals, occurrence characteristics usually refer to the form and content of elements in minerals.

[0055] In this embodiment of the invention, the coal and rock composition characteristics can be determined by analyzing the occurrence characteristics of major elements in coal and rock, which will be briefly explained below.

[0056] (1) Analysis of coal and petrographic components

[0057] Coal and rock are mainly composed of organic and inorganic components. Because coal and rock primarily develop in weak hydrodynamic, reducing, and acidic sedimentary environments, their inorganic components exhibit typical mineral assemblage characteristics. The minerals in coal and rock mainly fall into four categories:

[0058] ① Clay minerals: Mainly acidic clay minerals, such as kaolinite and illite-montmorillonite mixed layers. Clay minerals are the main component of coal ash.

[0059] ② Sulfides: mainly pyrite. Generally speaking, coal-rock pyrite content is lower in terrestrial sedimentary deposits and higher in shallow marine or marine-terrestrial transitional facies.

[0060] ③ Aluminosilicate rocks are most commonly composed of mechanically transported and deposited detrital quartz and feldspar.

[0061] ④ Carbonate rocks are widely distributed in coal, mainly consisting of calcite and siderite. Calcite is the most common, appearing as thin platy inclusions in the coal cleavages and is a metagenetic mineral. Overall, the inorganic components of coal mainly consist of minerals such as kaolinite, illite, chlorite, quartz, feldspar, pyrite, and calcite.

[0062] The organic components in coal and rock are amorphous, and their main component is organic carbon.

[0063] In the laboratory, the percentage content of organic and inorganic mineral components in coal and rock can be obtained either by using a rock pyrolysis apparatus or by using a spot measurement method with an advanced polarizing microscope.

[0064] (2) Analysis of the occurrence characteristics of major elements in coal and rock

[0065] Coal is mainly composed of 15 elements: carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur, sodium, magnesium, aluminum, silicon, potassium, calcium, titanium, manganese, and iron. Carbon, hydrogen, oxygen, and nitrogen are the main components of the organic components of coal, while sodium, magnesium, aluminum, silicon, potassium, calcium, titanium, phosphorus, manganese, and iron are the main components of the inorganic components. Sulfur is not only an important component of the organic components but also a significant component of sulfide and sulfate minerals in coal. By analyzing the content, distribution characteristics, and correlations of elements in coal, and understanding their occurrence forms and enrichment mechanisms, research on the inorganic components of coal can be conducted.

[0066] Sodium, magnesium, aluminum, silicon, potassium, calcium, titanium, phosphorus, manganese, iron and other elements are the main components of coal ash. In coal and rock, they mainly exist in the form of minerals such as silicates, oxides, sulfides, carbonates, sulfates and phosphates.

[0067] Silicon is found primarily in coal and rock as minerals such as detrital quartz, clay, and aluminosilicates.

[0068] Aluminum is found primarily as aluminum silicates (clay minerals, feldspar, etc.).

[0069] Iron is found mainly in minerals such as pyrite and siderite.

[0070] Magnesium is mainly found in chlorite minerals.

[0071] Sodium is found primarily in clay minerals and silicates.

[0072] Calcium is found primarily in coal as carbonate (mainly calcite) and sulfate (mainly gypsum) minerals. Calcite is the main carrier of calcium oxide in coal, primarily filling the fissures and acting as a secondary or metamorphic mineral. Terrigenous clastic calcite is very rare in coal, mainly because calcite decomposes easily under acidic conditions.

[0073] Potassium is found in coal and rock as illite and feldspar.

[0074] Sulfur is found in coal and rock as pyrite and organic sulfur.

[0075] Phosphorus is mainly found in apatite minerals.

[0076] Step 104: Based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock, perform mineral inversion calculations to obtain the coal and rock components.

[0077] Since the coal and rock formed in a still, acidic, and reducing environment, it can be inferred that calcite and siderite are epigenetic minerals, while montmorillonite is present in very small amounts. Elements such as sodium, potassium, and some alkali and alkaline earth metals, including calcium, exist in the minerals as metal ions. Elements such as sulfur and iron (mainly Fe) are also present. 2+ It exists in the reduced state of FeS2, and many trace elements also exist in the reduced state in minerals and isomorphous substances. The iron element mainly comes from pyrite and siderite, both of which are +2 valence iron. Pyrite is formed first in the reducing state during the syngenetic period, and siderite is formed in the postgenetic period.

[0078] Based on the above analysis and mineral chemical formulas, the calculation of inorganic minerals in coal and rock can be performed in the following order: first pyrite, then organic sulfur, then siderite, then calcium carbonate, then potassium feldspar, then clay, and finally quartz.

[0079] Since the elements measured by X-ray fluorescence analysis are oxides, when calculating the FeS2 content of pyrite, FeO needs to be converted into Fe content according to its chemical formula, and SO3 needs to be converted into S content according to its chemical formula.

[0080] The following explains the specific calculation method for the content of various inorganic minerals in the above-mentioned coal and rock.

[0081] (1) FeS2 content of pyrite:

[0082] Based on the atomic weight relationship between S and Fe in the chemical formula of pyrite (FeS2), if the S / Fe content is greater than the ratio of S to Fe in pyrite (1.143), it indicates that some sulfur exists in the form of organic sulfur, and the pyrite content should be calculated based on the Fe content. According to the chemical equation: FeS2 = Fe + 2S, we can deduce: W 黄铁矿 =120×(W) Fe -W 铁背景值 ) / 56; otherwise, it indicates that sulfur mainly exists in inorganic form, and excess iron exists in the form of siderite. The pyrite content should be determined based on the S content W s Calculation, that is:

[0083] W 黄铁矿 =120×W s / 64;

[0084] The molecular weight of FeS2 is 120, the molecular weight of Fe is 56, and the molecular weight of S is 64.

[0085] (2) Organic sulfur content:

[0086] Based on the S / Fe atomic weight ratio of 1.143 in pyrite, the presence of organic sulfur can be determined. If the S / Fe content is greater than 1.143, it indicates that some sulfur exists in the form of organic sulfur, which can be calculated as follows: W 有机硫 =W s -64×W 黄铁矿 / 120; otherwise, it indicates that no organic sulfur is present, where the molecular weight of FeS2 is 120, the molecular weight of Fe is 56, and the molecular weight of S is 64.

[0087] (3) FeCO3 content of siderite:

[0088] Based on the relationship between the S / Fe content and 1.143, determine the presence of siderite. If the S / Fe content is less than 1.143, it indicates the presence of excess iron in the sample, primarily in the form of siderite, with the following content:

[0089] (4) Calcite CaCO3 content:

[0090] W 方解石 =100×W CaO / 56.

[0091] (5) Potassium feldspar content:

[0092] Potassium feldspar is characterized by potassium. Both illite and potassium feldspar, found in the inorganic components of coal petrography, contain potassium. Analysis of coal petrographic mineral data shows a good correlation between illite and potassium feldspar, such as... Figure 2 As shown.

[0093] Based on the above correlation analysis, the following calculation formula can be obtained:

[0094] W 伊利石 =4.0549×W 钾长石 +9.0476.

[0095] According to illite (K 0.75 (Al 1.75 R)[Si 3.5 Al 0.5 O 10 According to the standard chemical composition of illite (OH)2 and potassium feldspar K[AlSi3O8], W K2O The content is 9.09%, and the W content in potassium feldspar is... K2O The content is 16.91%.

[0096] This leads to the following formula:

[0097] W K2O =0.0909×W 伊利石 +0.1691×W 钾长石 ;

[0098] Substituting the above formula for calculating illite into the equation yields:

[0099] W K2O =0.531×W 钾长石 +0.822;

[0100] Therefore, the formula for calculating potassium feldspar content can be obtained as follows:

[0101] W 钾长石 =(W K2O -0.822) / 0.531.

[0102] (6) Illite content:

[0103] W 伊利石 =(W K2O -0.1691×W 钾长石 ) / 0.0909.

[0104] (7) Chlorite content: The characteristic element of chlorite is magnesium, according to the chlorite MgFe4Al[AlSi3O 10 According to the standard chemical composition of chlorite, W... MgO The content is 16.84%. Therefore, the formula for calculating the chlorite content can be obtained as follows:

[0105] W 绿泥石 =W MgO / 0.1684.

[0106] (8) Kaolinite content:

[0107] The chemical formula of kaolinite is Al4[Si4O] 10 Kaolinite, along with chlorite, illite, and potassium feldspar, are all aluminosilicate minerals, as shown in Table 1 below, which contains the elemental composition of clay minerals in coal and rock.

[0108] The common characteristic element of kaolinite is aluminum. The kaolinite content can be calculated by analyzing the aluminum content. Specifically, the aluminum content in the three clay minerals (chlorite, illite, and potassium feldspar) is calculated based on their respective content; the remaining content is the aluminum content in kaolinite. The kaolinite content can then be calculated using the following formula:

[0109] W 总Al2O3 =0.3953×W 高岭石 +0.2088×W 绿泥石 +0.2957×

[0110] W 伊利石 +0.1835×W 钾长石 ;

[0111] W 高岭石 =(W 总Al2O3 -0.2088×W 绿泥石 -0.2957×W 伊利石 -

[0112] 0.1835×W 钾长石 ) / 0.3953.

[0113] Table 1

[0114]

[0115] (9) Quartz content:

[0116] Quartz has the chemical formula SiO2. Quartz, along with kaolinite, chlorite, illite, and potassium feldspar, are all silicon-containing minerals. Given the known contents of kaolinite, chlorite, illite, and potassium feldspar, the quartz content can be calculated based on the silicon content using the following formula:

[0117] W总SiO2 =0.4651×W 高岭石 +0.2645×W 绿泥石 +0.5412×

[0118] W 伊利石 +0.6475×W 钾长石 +W 石英 ;

[0119] W 石英 =(W 总SiO2 -0.4651×W 高岭石 -0.2645×W 绿泥石 -

[0120] 0.5412×W 伊利石 -0.6475×W 钾长石 .

[0121] Since coal and rock are composed of organic and inorganic components, with a total content of 100%, the organic component equals 100 minus the inorganic component, i.e.:

[0122] W 有机组分 =100-W 无机组分 ;

[0123] W 有机组分 =100-W 高岭石 -W 绿泥石 -W 伊利石 -W 钾长石 -

[0124] W 石英 -W 黄铁矿 -W 菱铁矿 -W 方解石 .

[0125] In other embodiments, laboratory analysis can be conducted on coal and rock samples at the same well depth, and the calculated organic and inorganic components can be corrected based on the laboratory measurement data to further improve the accuracy of the coal and rock component calculation results.

[0126] like Figure 3 The diagram shown is another flowchart of the coal and rock composition calculation method provided by the present invention, which includes the following steps:

[0127] Step 301: Obtain the coal and rock sample to be analyzed and divide the sample into two parts.

[0128] Alternatively, samples can be collected from the same well depth, two samples per group.

[0129] Step 302: Measure one of the samples using an X-ray fluorescence spectrometer to determine the elemental composition and content of the coal.

[0130] Step 303: Perform element-mineral correlation analysis based on the coal sedimentary environment to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal.

[0131] The elemental composition of coal and petrographic samples was obtained by X-ray fluorescence spectrometry. The content of inorganic mineral components in coal and petrographic samples at the same well depth was obtained by laboratory analysis. Pearson correlation coefficient analysis was used to conduct correlation analysis between major elements and minerals, and a correlation matrix table between major elements and minerals was established. If the correlation coefficient of a certain element with a certain mineral is greater than 0.5, it indicates that the element is mainly present in that mineral.

[0132] Step 304: Based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock, perform mineral inversion calculations to obtain the coal and rock components.

[0133] Step 305: The organic mineral composition of the coal rock is determined by laboratory analysis of another sample, and a correction factor is determined using the organic mineral composition of the coal rock.

[0134] Specifically, the content W of organic components in coal and rock obtained from laboratory measurements is... 实验有机组分 Calculate its content of organic components W based on elemental parameters. 有机组分 Based on the relationship, the corresponding correction coefficient K is obtained, that is:

[0135] K = W 实验有机组分 / W 有机组分 .

[0136] Step 306: Correct the calculated organic component and inorganic mineral content using the correction coefficient.

[0137] The content W of the organic components calculated based on the elemental parameters above was obtained by using the aforementioned correction factor K. 有机组分 After correction, the content of organic components is as follows:

[0138] W′ 有机组分修正 =K×W 有机组分 .

[0139] After obtaining the corrected organic component content, the correction value W′ can be used. 有机组分修正 The content values ​​of each inorganic component are corrected, and the specific calculations are as follows:

[0140]

[0141]

[0142]

[0143]

[0144]

[0145]

[0146]

[0147]

[0148]

[0149] The rapid coal and rock composition analysis method and apparatus provided by this invention calculates the inorganic and organic components of coal and rock based on elemental logging parameters, enabling real-time on-site coal and rock composition analysis during drilling. This provides strong technical support for coal and rock type identification, evaluation, and tracking of dominant coal and rock reservoirs. It overcomes the problems of time-consuming and inefficient laboratory coal and rock composition analysis, meeting the needs for real-time and efficient on-site coal and rock composition analysis.

[0150] The following example further illustrates the process of using the present invention to perform on-site coal and rock composition analysis.

[0151] Example 1: Analysis of coal core samples

[0152] Taking the YQ27 well in the Ordos Basin as an example, the well contains the Benxi Formation Deep 8 coal seam, 3.7m thick, located between 2582.50m and 2586.20m, and also contains a coal gangue (1.23m thick). The pure coal seam thickness is 2.47m; it is a two-part coal seam, belonging to a complex coal type. The roof is composed of dark gray limestone, and the floor is composed of gray-black mudstone.

[0153] A total of 11 coal and rock core samples were obtained from this well. The coal and rock sampling points are as follows: Figure 4 As shown, geochemical analysis was conducted on all coal and rock samples, including laboratory determination of organic matter content for four samples.

[0154] Elemental analysis of 11 coal and rock samples was performed using X-ray fluorescence spectrometry. The 11 major elements in the coal, namely Na, Mg, Al, Si, P, S, K, Ca, Ti, Mn and Fe, were determined and are shown in Table 2 below.

[0155] Table 2

[0156]

[0157] Based on the major elements of the coal core samples from well YQ27, the contents of inorganic components (kaolinite, chlorite, illite, quartz, potassium feldspar, pyrite, calcite, and siderite) and organic components were calculated. The contents of inorganic and organic components of all coal samples were obtained by correcting the organic matter content of four samples at well depths of 2584.90m, 2585.04m, 2585.85m, and 2586.20m in the laboratory, as shown in Table 3.

[0158] Table 3

[0159]

[0160] Example 2: Analysis of coal and rock cuttings samples

[0161] During the construction of well Y42, X-ray fluorescence spectrometry was used to conduct on-site analysis of rock cuttings. This method was then used to calculate the contents of inorganic and organic components in the coal and rock, solving the problem of inaccurate qualitative identification of coal and rock types by visual inspection in the field. This provides important support for quantitative coal type analysis. By calculating the contents of inorganic and organic components in coal and rock cuttings samples, the type of coal and rock can be determined.

[0162] like Figure 5 The image shows the content of organic and inorganic components in the coal and rock of well Y42. Among them:

[0163] The coal ranges from 2364.00m to 2374.97m, with an organic content between 57.52% and 59.04%, classifying it as semi-dull coal.

[0164] The coal has an internal density of 2364.97m-2367.35m, with an organic content ranging from 62.18% to 85.23%, and is classified as bright coal.

[0165] The coal ranges from 2367.35m to 2368.50m, with an organic content between 39.11% and 45.79%, and is classified as dark coal.

[0166] The coal ranges from 2368.50m to 2370.00m, with an organic content between 50.88% and 54.57%, and is classified as semi-dark coal.

[0167] Accordingly, the present invention also provides a coal and rock composition calculation device, such as... Figure 6 The diagram shown is a structural schematic of the device.

[0168] In this embodiment, the coal and rock composition calculation device 600 includes the following modules:

[0169] Sampling module 601 is used to acquire coal and rock samples to be analyzed;

[0170] Measurement module 602 is used to measure the sample using an X-ray fluorescence spectrometer to determine the elemental composition and content of the coal and rock.

[0171] The correlation analysis module 603 is used to perform element-mineral correlation analysis based on the coal sedimentary environment to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal.

[0172] The calculation module 604 is used to perform mineral inversion calculations based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock to obtain the coal and rock components.

[0173] In another non-limiting embodiment, such as Figure 7 As shown, the coal and rock composition calculation device 600 may further include: a correction module 605, used to correct the organic and inorganic mineral contents calculated by the calculation module using correction coefficients determined by laboratory analysis.

[0174] The specific implementation methods of the above modules can be referred to the description in the previous embodiments of the present invention, and will not be repeated here.

[0175] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0176] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0177] In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus can be implemented in other ways.

[0178] The present invention also provides a storage medium, which is a computer-readable storage medium storing a computer program thereon, the computer program being executable when it runs. Figure 1 or Figure 3 The method shown may include some or all of the steps. The storage medium may include read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc. The storage medium may also include non-volatile memory or non-transitory memory, etc.

[0179] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means.

[0180] The embodiments of the present invention have been described in detail above. Specific implementation methods have been used to illustrate the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and systems of the present invention, and are merely some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention, and the content of this specification should not be construed as a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for calculating coal petrographic components, characterized in that, The method includes: Obtain coal and rock samples to be analyzed; The elemental composition and content of the coal and rock were determined by measuring the sample using X-ray fluorescence spectrometry. Based on the coal sedimentary environment, the correlation analysis between elements and minerals was conducted to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal. Based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock, mineral inversion calculations are performed to obtain the coal and rock components.

2. The method for calculating coal and petrographic components according to claim 1, characterized in that, The elements of the coal and rock obtained by X-ray fluorescence spectrometry are oxides, including any one or more of the following: FeO, SO3.

3. The method for calculating coal and petrographic components according to claim 1, characterized in that, The step of determining the occurrence characteristics of the elements in the inorganic mineral components of the coal rock by performing element-mineral correlation analysis based on the coal rock sedimentary environment includes: Determine the characteristics of coal petrographic components; The occurrence characteristics of the element in the inorganic mineral components of the coal and rock are determined based on the characteristics of the coal and rock composition.

4. The method for calculating coal and petrographic components according to claim 2, characterized in that, The mineral inversion calculation includes: Calculate the inorganic mineral content in the coal and rock; The organic components in the coal and rock are calculated based on the inorganic mineral content.

5. The method for calculating coal and petrographic components according to claim 4, characterized in that, The calculation of the inorganic mineral content in the coal and rock includes: Calculate the contents of the following components in the coal and rock in sequence: pyrite, organic sulfur, siderite, calcium carbonate, potassium feldspar, clay, and quartz.

6. The method for calculating coal and petrographic components according to claim 5, characterized in that, Calculating the pyrite content includes: The FeO content measured by X-ray fluorescence spectrometry is converted into Fe content, and SO3 is converted into S content. The S / Fe ratio is then calculated. If the S / Fe value is greater than the set value, the pyrite content is calculated based on the Fe content; otherwise, the pyrite content is calculated based on the S content.

7. The method for calculating coal and petrographic components according to claim 6, characterized in that, The set value is 1.

143.

8. The method for calculating coal and petrographic components according to claim 7, characterized in that: The pyrite content calculated based on the Fe content is: W 黄铁矿 =120×(W) Fe -W 铁背景值 ) / 56; The pyrite content calculated based on the S content is: W 黄铁矿 =120×W s / 64.

9. The method for calculating coal and petrographic components according to claim 4, characterized in that, The method further includes: The organic mineral composition of the coal rock was determined by laboratory analysis of another sample. The correction factor is determined based on the organic mineral composition of the coal and rock. The calculated organic and inorganic mineral contents are corrected using the aforementioned correction coefficients.

10. A coal and rock composition calculation device, characterized in that, The device includes: The sampling module is used to acquire coal and rock samples to be analyzed. The measurement module is used to measure the sample using an X-ray fluorescence spectrometer to determine the elemental composition and content of the coal and rock. The correlation analysis module is used to perform element-mineral correlation analysis based on the coal sedimentary environment to determine the occurrence characteristics of the elements in the inorganic mineral components of the coal. The calculation module is used to perform mineral inversion calculations based on the occurrence characteristics of the elements in the inorganic mineral components of the coal and rock to obtain the coal and rock components.

11. The coal and petrographic composition calculation device according to claim 10, characterized in that, The device further includes: The correction module is used to correct the organic component and inorganic mineral content calculated by the calculation module using correction coefficients determined by laboratory analysis.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run by the processor, it performs the steps of the coal and rock composition calculation method according to any one of claims 1 to 9.

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