Method and device for identifying adsorbed organic matters of clay minerals

Abstract

The invention provides a method and a device for identifying organic matters adsorbed by clay minerals. The method for identifying the organic matters adsorbed by the clay minerals comprises the following steps: acquiring clay mineral particles of a rock sample; performing X-ray diffraction on the clay mineral particles at different temperatures to obtain a plurality of X-ray diffraction patterns; identifying adsorbed organic matters of the clay mineral according to the plurality of X-ray diffraction patterns; wherein the adsorption organic matter is adsorbed on the clay mineral in a natural complex form. The method provided by the invention can ensure that the clay mineral complex is fully separated from other components, and also can avoid the situations that the clay mineral adsorbs organic matters to be damaged and other inorganic mineral crystals wrap organic matters to be released, so that the experiment precision can be greatly improved.

Description

Technical Field

[0001] This application belongs to the field of oil and gas field exploration technology, particularly the field of geochemical technology related to oil and gas field exploration, and specifically relates to a method and apparatus for identifying adsorbed organic matter in clay minerals. Background Technology

[0002] During the deposition of source rocks, organic matter can be adsorbed onto the surface or interlayer of clay minerals through physical or chemical processes such as intermolecular attraction, coordination exchange, and cation bridging, forming clay mineral-adsorbed organic matter. This complex is one of the main ways in which organic matter is found in source rocks, and its formation is controlled by factors such as source supply and sedimentary environment, making it an important source material for hydrocarbon generation. In the hydrocarbon generation process of clay mineral-adsorbed organic matter, clay minerals can control the hydrocarbon generation efficiency and hydrocarbon products of source rocks by participating in dehydroxylation and cracking reactions. Furthermore, the type of clay minerals and their diagenetic processes also affect the hydrocarbon generation process. Therefore, effectively separating clay mineral-adsorbed organic matter from source rocks for research is of great significance for understanding the formation conditions and hydrocarbon generation characteristics of source rocks, and provides guidance for resource potential assessment and oil and gas exploration and development.

[0003] The invention patent application number CN202210068325.8 discloses a method for extracting clay minerals from shale. The method includes: 1) Drying: Drying the raw material at 40℃ for 1-2 days, then pulverizing it into powder of approximately 0.5mm or less; 2) Removal of soluble salts: Screening the pulverized powder through a sieve with a pore size of 0.1-0.5mm, pouring the powder with particles no larger than 0.5mm into a container, adding purified water to remove soluble salts, and removing the supernatant after the container has settled; 3) Decomposition of organic matter: Adding... 1) Heat a 10% hydrogen peroxide solution for 30-60 minutes at 55-70℃, then add a 5% hydrogen peroxide solution until no more bubbles are produced. 4) Hydrogen peroxide decomposition: Heat the container until the water content is below 10% to decompose the residual hydrogen peroxide. After the powder settles, remove the supernatant. 5) Carbonate removal: Add a 5% dilute hydrochloric acid solution to the volume containing the removed organic matter and hydrogen peroxide. The ratio of powder to dilute hydrochloric acid solution is 1:3-1:5. After stirring evenly, aspirate the solution into a centrifuge. 6) Removal of free iron oxide: The centrifuged and filtered powder is placed in a container, and 5% sodium disulfite or hyposulfite is added to remove free iron. After the container settles, the supernatant is removed. 7) Removal of cristobalite and quartz: 3% sodium hydroxide solution is added to the container for removing iron oxide, and the mixture is stirred for 30 minutes. After the container settles, the supernatant is removed. 8) Removal of amorphous materials: The powder from which cristobalite and quartz have been removed is added to a 2% sodium carbonate solution, heated and stirred, boiled for 5 minutes, cooled to room temperature, and centrifuged to remove the supernatant. 9) Mineral separation: Add purified water and dispersant to the powder after removing amorphous material, stir for 15 minutes to completely disperse the clay mineral particles in the water to form a suspension, and let it settle; 10) Extraction of mineral particles smaller than 2 micrometers: Transfer the upper suspension from the container to another container, centrifuge the upper suspension at high speed, and then dry it to obtain mineral particles smaller than 2 micrometers; 11) Extraction of mineral particles larger than 2 micrometers: Centrifuge the container after extracting the upper suspension in a centrifuge, and then dry it to obtain mineral particles larger than 2 micrometers.

[0004] The above method involves crushing and drying shale, then adding various solutions such as pure water, hydrogen peroxide, and dilute hydrochloric acid in sequence to remove soluble salts, organic matter, carbonates, and other components. After stirring the suspension evenly, the upper clay suspension is repeatedly extracted to a certain depth using the Stockers sedimentation method until it becomes clear. Finally, the suspension is centrifuged to obtain clay minerals from the shale.

[0005] Although the above methods can obtain high-quality clay minerals and organic matter, they cannot extract organic-clay complexes from source rocks. In summary, the existing methods restrict the study of organic matter occurrence and hydrocarbon generation characteristics in source rocks, and affect the accuracy of oil and gas resource evaluation. Summary of the Invention

[0006] One objective of this invention is to provide a method for identifying adsorbed organic matter in clay minerals. This method ensures that the clay mineral complex is fully separated from other components, while avoiding the destruction of adsorbed organic matter in clay minerals and the release of organic matter encapsulated in other inorganic mineral crystals, thereby greatly improving experimental accuracy.

[0007] Another object of the present invention is to provide a device for identifying adsorbed organic matter in clay minerals. A further object of the present invention is to provide an electronic device comprising a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the above-described method for identifying adsorbed organic matter in clay minerals. A further object of the present invention is to provide a readable medium storing a computer program thereon, the computer program being executed by a processor to implement the steps of the above-described method for identifying adsorbed organic matter in clay minerals.

[0008] To address the technical problems in the background section of this application, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a method for identifying adsorbed organic matter in clay minerals, comprising:

[0010] Obtain clay mineral particles from rock samples;

[0011] X-ray diffraction was performed on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns;

[0012] The adsorbed organic matter of the clay minerals was identified based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter was adsorbed onto the clay minerals in the form of a natural complex.

[0013] In some embodiments of the present invention, identifying the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns includes:

[0014] The adsorbed organic matter is identified based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

[0015] In some embodiments of the present invention, the clay mineral particles used to obtain the rock sample include:

[0016] A suspension of the clay mineral particles was prepared based on the rock sample fragments and deionized water.

[0017] The suspension is subjected to ultrasonic vibration to obtain the clay mineral particles.

[0018] In some embodiments of the present invention, after ultrasonically agitating the suspension, the method further includes:

[0019] Perform the following cycle until the liquid at the top of the suspension is clear:

[0020] Add deionized water to the suspension after ultrasonic vibration;

[0021] Stir and let stand for the preset time.

[0022] In some embodiments of the present invention, obtaining the clay mineral particles includes:

[0023] The top liquid is extracted as the top liquid of the suspension in the clarified state;

[0024] The top liquid is centrifuged to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

[0025] In some embodiments of the present invention, the stirring direction is either counterclockwise or clockwise.

[0026] In some embodiments of the present invention, the X-ray diffraction of the clay mineral particles at different temperatures includes:

[0027] The clay mineral particles were subjected to X-ray diffraction by heating.

[0028] In a second aspect, the present invention provides a device for identifying adsorbed organic matter in clay minerals, the device comprising:

[0029] The particle acquisition module is used to acquire clay mineral particles from rock samples.

[0030] The spectrum acquisition module is used to perform X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns.

[0031] An adsorbed organic matter identification module is used to identify the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay mineral in the form of a natural complex.

[0032] In some embodiments of the present invention, the adsorbed organic matter identification module includes:

[0033] An adsorbed organic matter identification unit is used to identify the adsorbed organic matter based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

[0034] In some embodiments of the present invention, the particle acquisition module includes:

[0035] A suspension preparation unit is used to prepare a suspension of clay mineral particles based on the rock sample fragments and deionized water.

[0036] A particle acquisition unit is used to ultrasonically vibrate the suspension to obtain the clay mineral particles.

[0037] In some embodiments of the present invention, a clay mineral adsorption organic matter identification device further includes:

[0038] A circulation operation module is used to perform the following circulation operation until the liquid at the top of the suspension is clear: the circulation operation module includes:

[0039] The ionized water addition unit is used to add ionized water to the suspension after ultrasonic vibration.

[0040] The stirring and stabilizing unit is used for stirring and stabilizing for a preset time.

[0041] In some embodiments of the present invention, the particle acquisition unit includes:

[0042] A top liquid extraction unit is used to extract the top liquid from the clear suspension.

[0043] A top liquid centrifuge unit is used to centrifuge the top liquid to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

[0044] In some embodiments of the present invention, the stirring direction is either counterclockwise or clockwise.

[0045] In some embodiments of the present invention, the spectrum acquisition module includes:

[0046] Multiple spectrogram acquisition units are used to perform X-ray diffraction on the clay mineral particles by heating.

[0047] Thirdly, the present invention provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of a method for identifying adsorbed organic matter in clay minerals.

[0048] Fourthly, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of a method for identifying adsorbed organic matter in clay minerals.

[0049] Fifthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for identifying adsorbed organic matter in clay minerals.

[0050] As described above, embodiments of the present invention provide a method and apparatus for identifying adsorbed organic matter in clay minerals. The corresponding method for identifying adsorbed organic matter in clay minerals includes: first, obtaining clay mineral particles from a rock sample; then, performing X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; and finally, identifying the adsorbed organic matter in the clay minerals based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay minerals in the form of a natural complex.

[0051] The corresponding clay mineral adsorbed organic matter identification device includes: a particle acquisition module for acquiring clay mineral particles from a rock sample; a spectrum acquisition module for performing X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; and an adsorbed organic matter identification module for identifying the adsorbed organic matter of the clay mineral based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay mineral in the form of a natural complex.

[0052] In summary, the method and apparatus for identifying adsorbed organic matter in clay minerals provided by the embodiments of the present invention, on the one hand, differs from the hydrogen peroxide and acid-base solution methods in the prior art. The present invention ensures that the clay mineral complex is fully separated from other components, while avoiding the problems of the clay mineral adsorbed organic matter being destroyed and other inorganic mineral crystals encapsulating organic matter being released. Therefore, it can greatly improve the accuracy of subsequent experiments.

[0053] On the other hand, the present invention selects heated X-ray diffraction analysis to identify the presence of clay minerals adsorbed organic matter, effectively ensuring that the natural complex formed by clay minerals and organic matter is effectively extracted. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic flowchart of a method for identifying adsorbed organic matter in clay minerals according to an embodiment of the present invention.

[0056] Figure 2 This is a flowchart illustrating step 300 of a method for identifying adsorbed organic matter in clay minerals according to an embodiment of the present invention.

[0057] Figure 3 This is a schematic flowchart of step 100 of a method for identifying adsorbed organic matter in clay minerals according to an embodiment of the present invention.

[0058] Figure 4 This is another flowchart illustrating step 100 of a method for identifying adsorbed organic matter from clay minerals according to an embodiment of the present invention.

[0059] Figure 5 This is a flowchart illustrating step 102 of a method for identifying adsorbed organic matter from clay minerals in an embodiment of the present invention.

[0060] Figure 6 This is a schematic flowchart of step 200 of a method for identifying adsorbed organic matter in clay minerals according to an embodiment of the present invention.

[0061] Figure 7 This is a flowchart illustrating a method for identifying adsorbed organic matter in clay minerals according to a specific embodiment of the present invention.

[0062] Figure 8 Mind map of a method for identifying adsorbed organic matter in clay minerals according to a specific embodiment of the present invention;

[0063] Figure 9 This is a heated X-ray diffraction pattern of a natural composite rock sample according to a specific embodiment of the present invention.

[0064] Figure 10 This is a block diagram of a clay mineral adsorption organic matter identification device according to an embodiment of the present invention;

[0065] Figure 11 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0067] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses. Without conflict, the embodiments and features in the embodiments of this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0069] The acquisition, storage, use, and processing of data in this application comply with relevant laws and regulations.

[0070] In the prior art, patent application CN201611069448.4 provides a method for preparing high-purity kerogen. This method includes: pulverizing a sample, then sequentially subjecting the pulverized sample to water soaking, hydrochloric acid treatment, hydrochloric acid-hydrofluoric acid treatment, and heavy liquid flotation testing. For cases where effective stratification is not achieved during heavy liquid flotation, the sample treated with 1-5% (by mass) dilute nitric acid is treated with the hydrochloric acid-hydrofluoric acid treated sample, followed by arsenic-free zinc particles-hydrochloric acid treatment, and finally heavy liquid flotation to obtain the kerogen. This method also cannot extract organic-clay composites from source rocks.

[0071] Example 1:

[0072] For the reasons stated above, embodiments of the present invention provide a specific implementation of a method for identifying adsorbed organic matter in clay minerals, see [link to implementation details]. Figure 1 Specifically, it includes the following:

[0073] Step 100: Obtain clay mineral particles from the rock sample;

[0074] Step 200: Perform X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns;

[0075] Step 300: Identify the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay mineral in the form of a natural complex.

[0076] As described above, embodiments of the present invention provide a method for identifying adsorbed organic matter in clay minerals, comprising: first, obtaining clay mineral particles from a rock sample; then, performing X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; and finally identifying the adsorbed organic matter in the clay minerals based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay minerals in the form of a natural complex.

[0077] In summary, the method for identifying adsorbed organic matter in clay minerals provided by the embodiments of the present invention differs from the hydrogen peroxide and acid-base solution methods in the prior art. The present invention ensures that the clay mineral complex is fully separated from other components, while avoiding the destruction of adsorbed organic matter in clay minerals and the release of organic matter encapsulated in other inorganic mineral crystals. Therefore, it can greatly improve the accuracy of subsequent experiments.

[0078] On the other hand, the present invention selects heated X-ray diffraction analysis to identify the presence of clay minerals adsorbed organic matter, effectively ensuring that the natural complex formed by clay minerals and organic matter is effectively extracted.

[0079] Example 2:

[0080] For step 100, clay mineral particles refer to the tiny mineral particles that make up clay, with a size of less than 2 micrometers. Clay minerals have a layered structure and can adsorb ions and molecules in water. Preferably, the clay minerals in step 100 include kaolinite, montmorillonite, and illite.

[0081] In step 100, a certain amount of source rock is selected, ground, and sifted to obtain fragments larger than a preset mesh size. The fragments are then dried, and a certain volume of deionized water is introduced into the fragments to prepare a suspension. The suspension is then subjected to ultrasonic vibration to obtain clay mineral particles.

[0082] Understandably, the X-ray diffraction in step 200 is based on the interaction between X-rays and atoms in the material, obtaining crystal structure information of clay mineral particles by measuring the scattering angle and intensity of X-rays. Specifically, when a beam of monochromatic X-rays is incident on a crystal, since the crystal is composed of unit cells with regularly arranged atoms, the interatomic distances of these regularly arranged atoms are on the same order of magnitude as the wavelength of the incident X-rays. Therefore, the X-rays scattered by different atoms interfere with each other, producing strong X-ray diffraction in certain special directions. The orientation and intensity of the diffracted lines in space are closely related to the crystal structure, and the diffraction pattern produced by each crystal reflects the atomic distribution pattern inside the crystal.

[0083] When an X-ray beam irradiates a crystalline sample of clay mineral particles, the X-rays are scattered by the atomic lattice of the sample. According to Bragg's Law, X-rays undergo enhanced scattering (diffraction) at specific angles, forming distinct diffraction peaks. The expression for Bragg's Law is:

[0084] nλ=2dsinθ

[0085] Where: n is the diffraction order (usually taken as 1); λ is the wavelength of the X-ray; d is the spacing between parallel atomic layers in the crystal; θ is half of the incident angle and scattering angle of the X-ray.

[0086] Regarding step 300, the characteristics of X-ray diffraction patterns at different temperatures can be used to identify the adsorbed organic matter in clay minerals. Specifically, the characteristics of the aforementioned X-ray diffraction patterns include diffraction peaks, the shape and width of the diffraction peaks, and background signals.

[0087] Diffraction peaks:

[0088] Each distinct peak corresponds to a specific family of crystal planes in the crystal.

[0089] The position (angle) of the peak can be used to calculate the distance (d) between crystal planes according to Bragg's law.

[0090] The position of a peak is the fingerprint of a material's crystal structure; different substances have their unique diffraction peak positions.

[0091] Peak shape and width:

[0092] The shape and width of the peaks can reflect the crystal size, stress state, and defects of the sample.

[0093] Wider peaks usually indicate smaller grain size or higher crystal defects.

[0094] Background signal: The background signal may originate from the amorphous portion of the sample, instrument scattering, or other environmental factors. When analyzing the data, the background needs to be subtracted from the diffraction data to clearly see the diffraction peaks.

[0095] In some embodiments of the present invention, see Figure 2 Step 300 includes:

[0096] Step 301: Identify the adsorbed organic matter based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

[0097] In X-ray diffraction (XRD) patterns, specific peaks, such as the d001 peak, refer to diffraction peaks generated by the interaction of X-rays with the crystal structure in the sample. These peaks reflect the spacing of specific families of crystal planes. In nomenclature, the d001 peak refers to the interplanar spacing with a crystallographic index hkl of 001 corresponding to these families of crystal planes.

[0098] The d001 peak indicates the spacing of the 001 crystal planes in the crystal. The d value can be calculated from the diffraction angle θ, which is a direct method for measuring the repeating spacing of the basic unit cells of the crystal structure along a specific direction.

[0099] In step 301, the area of ​​the d001 peak corresponding to the relatively high temperature is subtracted from the area of ​​the d001 peak corresponding to the relatively low temperature. The difference in area can be used to characterize the adsorbed organic matter.

[0100] In some embodiments of the present invention, see Figure 3 Step 100 includes:

[0101] Step 101: Prepare a suspension of clay mineral particles based on the rock sample fragments and deionized water;

[0102] Understandably, the following preparatory work is required before step 101: grinding and crushing the sample, screening and separating the debris particles, and drying them.

[0103] The suspension prepared in step 101 has the following characteristics: A suspension is a mixture of liquid and uniformly dispersed solid particles. These solid particles are insoluble in the liquid but can be uniformly dispersed by physical means (such as stirring or vibration). Under gravity or after standing for a period of time, the solid particles in the suspension may gradually settle to the bottom of the container. Specifically:

[0104] Although they may appear homogeneous when stirred or shaken, suspensions are inherently heterogeneous because their components (solids and liquids) are separated at the molecular level. The stability of a suspension can be enhanced by adding surfactants, thickeners, or using specialized preparation techniques that prevent particle aggregation and sedimentation. The size of solid particles in a suspension can range from micrometers to several millimeters. The size and shape of the particles affect the stability and appearance of the suspension.

[0105] Step 102: The suspension is subjected to ultrasonic vibration to obtain the clay mineral particles.

[0106] Specifically, the suspension is stirred using sound waves with a frequency of approximately 20 kHz to 50 MHz. Preferably, a probe-type ultrasonic vibrator (suitable for high-intensity treatment of small-volume samples) is used. During ultrasonic vibration, it is necessary to ensure that the probe is immersed in the suspension but does not touch the bottom or sidewalls of the container. Additionally, the ultrasonic treatment may generate heat, causing the sample temperature to rise, which may affect the sample's stability or activity. If necessary, a cooling system can be used to control the sample temperature.

[0107] In some embodiments of the present invention, see Figure 4 After ultrasonically agitating the suspension, the method further includes:

[0108] Step 103: Perform the following cycle until the liquid at the top of the suspension is clear:

[0109] Step 104: Add deionized water to the suspension after ultrasonic vibration;

[0110] Step 105: Stir and let stand for the preset time.

[0111] In steps 103 to 105, deionized water is added to the suspension and stirred until homogeneous. After standing for a certain period of time, the top suspension at a certain depth is extracted. Water is added repeatedly, the top suspension is stirred and extracted repeatedly until the top suspension is clear after standing, thus obtaining clay mineral particles with a particle size of less than 2 micrometers.

[0112] In some embodiments of the present invention, see Figure 5 Step 102, obtaining the clay mineral particles, includes:

[0113] Step 1021: Extract the top liquid from the clear suspension;

[0114] Step 1022: Centrifuge the top liquid to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

[0115] Specifically, the extracted suspension was centrifuged and transferred to a crucible for drying. The dried clay mineral particles were then ground and the samples were collected.

[0116] In some embodiments of the present invention, the stirring direction in step 105 is both counterclockwise and clockwise.

[0117] Specifically, the suspension is stirred evenly using a glass rod. During the stirring process, the glass rod should not be kept in the same direction. It is preferable to alternate between counterclockwise and clockwise directions to avoid generating centrifugal force that causes the clay mineral particles to flocculate.

[0118] In some embodiments of the present invention, see Figure 6 Step 200 includes:

[0119] Step 201: Perform X-ray diffraction on the clay mineral particles by heating.

[0120] Preferably, the following three temperatures are selected: natural drying temperature (25℃), 250℃, and 550℃, and X-ray diffraction is performed on the clay mineral particles in sequence.

[0121] Furthermore, the X-ray diffraction slide preparation method is to prepare naturally oriented slides using a titration suspension method. The analytical test temperature conditions are natural conditions (25℃), 250℃, and 550℃. The heated slide preparation method is to use a muffle furnace for heating. The analytical test conditions are CuKα target, tube voltage 40kV, tube current 40mA, and scanning angle 3-30° (2θ).

[0122] As can be seen from the above description, in order to address the problems existing in the prior art and to achieve the physical separation of adsorbed organic matter from clay minerals and other components in source rocks, this invention provides a method for identifying adsorbed organic matter from clay minerals, comprising: first, obtaining clay mineral particles from a rock sample; then, performing X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; and finally, identifying the adsorbed organic matter from the clay minerals based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay minerals in the form of a natural complex.

[0123] Specifically, firstly, the source rock samples were crushed, screened, and dried; a suspension was prepared by soaking the samples, and then stirred and ultrasonically vibrated; deionized water was added to the suspension and stirred evenly, and after standing for a certain period of time, the suspension was extracted to a certain depth. This step was repeated to fully extract clay mineral particles with a particle size of less than 2 μm; next, the obtained suspension was centrifuged and dried, and the dried sample was collected by grinding; a small amount of sample was extracted to prepare naturally oriented slides, and heated XRD analysis was performed to obtain multiple sets of XRD patterns; finally, the d001 diffraction peak characteristics of the patterns were compared to identify the adsorbed organic matter of the clay minerals.

[0124] In summary, the method for identifying adsorbed organic matter in clay minerals provided by the embodiments of the present invention differs from the hydrogen peroxide and acid-base solution methods in the prior art. The present invention ensures that the clay mineral complex is fully separated from other components, while avoiding the destruction of adsorbed organic matter in clay minerals and the release of organic matter encapsulated in other inorganic mineral crystals. Therefore, it can greatly improve the accuracy of subsequent experiments.

[0125] On the other hand, the present invention selects heated X-ray diffraction analysis to identify the presence of clay minerals adsorbed organic matter, effectively ensuring that the natural complex formed by clay minerals and organic matter is effectively extracted.

[0126] Example 3:

[0127] To further illustrate the scheme, in one specific embodiment, the present invention also provides a specific implementation method for identifying adsorbed organic matter in clay minerals, using four samples from the Shahejie Formation source rock strata in the Dongying Depression of the Bohai Bay Basin as examples. See [link to implementation details]. Figure 7 as well as Figure 8 Specifically, it includes the following steps.

[0128] S1: Grind and crush the sample, screen out the debris particles, and dry them.

[0129] Select a sample size of 30-50g, grind it to a fineness of 100 mesh or higher, dry it at 60℃ for 24 hours.

[0130] Specifically, 30-50 grams of source rock sample were weighed using a balance and thoroughly ground. The crushed sample was then passed through a 100-mesh stainless steel sieve to separate the debris particles with a particle size greater than 100 mesh (less than 0.15 mm). The sieved debris particles were then placed in a drying oven at 60°C and dried for 24 hours.

[0131] S2: Place the debris particles into a beaker, add deionized water and stir to prepare a suspension, and then sonicate the suspension.

[0132] In step S2, the beaker is 2 liters in size, the amount of deionized water added is 200-400 ml, the stirring time is 12-24 hours, and the ultrasonic oscillation time is 15-20 minutes.

[0133] Specifically, the dried fragments are placed in a 2-liter beaker, and 300-400 ml of deionized water is added to prepare a suspension. A magnetic rotor is added to the beaker, and the suspension is stirred with a magnetic stirrer for 12-24 hours. Then, the magnetic rotor is removed with a magnet, and the beaker is placed in an ultrasonic oscillator and ultrasonically oscillated for 15-20 minutes to ensure that the complex is fully separated from other components and to have an anti-flocculation effect (preventing or slowing down the process of particles or other dispersed phases agglomerating into clumps in the liquid).

[0134] The magnetic stirrer described above mainly consists of the following parts:

[0135] Stirring plate: It is usually a flat plate, and some have a heating function to control the temperature of the sample.

[0136] Motor: Drives the built-in magnet to rotate, thereby generating a rotating magnetic field.

[0137] Control system: Used to adjust the stirring speed and (if available) the heating temperature.

[0138] Magnetic rod: Usually a small magnetic rod coated with plastic or glass, which is placed in a liquid sample and rotates as the magnet on the stirring plate rotates, thereby stirring the liquid.

[0139] In addition, anti-flocculation can also be achieved through the following methods:

[0140] Introducing charges onto the surface of the dispersed phase, causing particles to carry the same charge, and preventing flocculation due to mutual repulsion. This method is common in water-based systems, such as those using cationic or anionic surfactants.

[0141] A thick polymer layer is adsorbed on the surface of the dispersed phase. When two particles approach each other, the polymer layer prevents the particles from getting close enough to generate an effective attraction due to physical interference.

[0142] By increasing the viscosity of the dispersion medium, the movement speed of the particles is slowed down, thereby reducing the probability of them colliding and forming flocs.

[0143] S3: Add deionized water to the suspension and stir evenly. After standing for a certain period of time, extract the suspension from a certain depth at the top. Repeat the process of adding water, stirring and extracting the top suspension until the top suspension becomes clear after standing, thus obtaining clay mineral particles with a particle size of less than 2 micrometers.

[0144] Add deionized water to the 2-liter mark on the beaker, let it stand for 8 hours, extract the top suspension to a depth of 10 cm, and use the siphon method for extraction.

[0145] Specifically, add deionized water to the suspension until it reaches the 2-liter mark on the beaker. Use a glass rod to stir the suspension evenly. During stirring, do not keep the glass rod in the same direction to avoid centrifugal force causing the clay mineral particles to flocculate. After stirring, let the suspension stand for 8 hours. Then, extract the upper 10 cm of suspension using a siphon method. Repeat the process of adding water, stirring, standing, and extracting until the top suspension is clear after standing. In this way, clay mineral particles with a diameter of less than 2 micrometers can be fully extracted.

[0146] S4: Centrifuge the extracted suspension and transfer it to a crucible for drying. Grind the dried clay mineral particles and collect the sample.

[0147] The centrifugation time is 10-15 minutes, the centrifugation speed is 5000 rpm, the drying temperature is 60℃, and the drying time is 72-120 hours.

[0148] Specifically, the extracted suspension was transferred to a centrifuge bottle and centrifuged at a speed of 5000 rpm for 10–15 minutes. After centrifugation, the supernatant was discarded, and the bottom sediment was transferred to a crucible. The crucible was then placed in a drying oven at 60°C and dried for 72–120 hours. The dried clay mineral particles were then transferred to an agate mortar and ground thoroughly until they were smooth to the touch. The samples were then collected, bagged, and the relevant information was recorded on the sample bags.

[0149] The agate mortar mentioned above has the following characteristics: high hardness, which can effectively resist scratches and wear; good chemical stability, which does not easily react with most chemical substances; and a smooth surface, which does not easily adsorb the material being ground, thus contributing to the accuracy of experimental analysis.

[0150] S5: Extract a small amount of clay mineral particles to prepare slides, perform heated X-ray diffraction analysis, and obtain multiple sets of XRD patterns.

[0151] Preferably, the heated X-ray diffraction preparation method is to prepare naturally oriented slides using a titration suspension method. The analytical test temperature conditions are natural conditions (25℃), 250℃, and 550℃. The heated slide preparation method is to use a muffle furnace for heating. The analytical test conditions are CuKα target, tube voltage 40kV, tube current 40mA, and scanning angle 3-30° (2θ).

[0152] Specifically, 0.5 g of the ground clay mineral particles were extracted and placed in a centrifuge tube. 40 ml of deionized water was added for soaking, followed by centrifugation at 5000 rpm for 10 minutes. After discarding the supernatant, a naturally oriented slide was prepared using the resulting bottom sediment. After drying, X-ray diffraction analysis was performed. The naturally oriented slide was then heated in a muffle furnace to prepare 250°C and 550°C heated slides, which were then subjected to X-ray diffraction analysis. The X-ray diffraction analysis conditions were: CuKα target, tube voltage 40 kV, tube current 40 mA, and scanning angle 3-30° (2θ). Based on this, multiple sets of XRD patterns were obtained, as shown in the figure. Figure 9 As shown.

[0153] The main components of the aforementioned muffle furnace include:

[0154] Casing: Usually made of metal, with good structural strength and durability.

[0155] Heating chamber: The interior is usually made of refractory materials, such as ceramics or refractory bricks, to maintain a high-temperature environment.

[0156] Heating element: usually a resistance wire or silicon carbide rod, which surrounds the heating chamber and is heated by electricity.

[0157] Temperature control system: includes temperature sensors (such as thermocouples) and controllers, used to precisely control and monitor the temperature inside the furnace.

[0158] S6: Compare and analyze the characteristics of different XRD patterns to identify the adsorption of organic matter by clay minerals.

[0159] The XRD pattern characteristics for comparison are the interlayer spacing variations of the d001 diffraction peak.

[0160] Specifically, the d001 diffraction peaks of clay minerals under different temperature conditions were read based on XRD patterns, and the variation characteristics of the d001 diffraction peaks were compared and analyzed to identify the adsorption of organic matter by clay minerals.

[0161] See Figure 9 The XRD patterns of the natural complex differ under different temperature conditions, with the d001 peak being higher in the naturally dried slides (respectively...). and The diffraction peaks are relatively broad; after heating to 250℃, the d001 peak shows a significant decrease (respectively...). and Furthermore, the diffraction peaks exhibit asymmetry, indicating that after heating at 250℃, the interlayer water in the clay minerals was expelled, but interlayer organic matter remained in the interlayer domains; after heating at 550℃, the d001 peaks all decreased to [value missing]. The indicator shows that after heating at 550℃, the interlayers of clay minerals collapse, releasing interlayer organic matter. In other words, when the difference between the area of ​​the high-temperature d001 peak and the area of ​​the low-temperature d001 peak exceeds a certain preset threshold, the adsorbed organic matter in the clay minerals can be identified.

[0162] As described above, a specific application example of the present invention provides a method for identifying adsorbed organic matter in clay minerals, comprising: first, obtaining clay mineral particles from a rock sample; then, performing X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; and finally identifying the adsorbed organic matter in the clay minerals based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay minerals in the form of a natural complex.

[0163] Specifically, firstly, the source rock samples were crushed, screened, and dried; a suspension was prepared by soaking the samples, and then stirred and ultrasonically vibrated; deionized water was added to the suspension and stirred evenly, and after standing for a certain period of time, the suspension was extracted to a certain depth. This step was repeated to fully extract clay mineral particles with a particle size of less than 2 μm; next, the obtained suspension was centrifuged and dried, and the dried sample was collected by grinding; a small amount of sample was extracted to prepare naturally oriented slides, and heated XRD analysis was performed to obtain multiple sets of XRD patterns; finally, the d001 diffraction peak characteristics of the patterns were compared to identify the adsorbed organic matter of the clay minerals.

[0164] In summary, the method for identifying adsorbed organic matter in clay minerals provided by the specific application examples of this invention differs from the hydrogen peroxide and acid / alkali solution methods in the prior art. This invention ensures that the clay mineral complex is fully separated from other components while avoiding the destruction of adsorbed organic matter in the clay minerals and the release of organic matter encapsulated in other inorganic mineral crystals. Therefore, it can greatly improve the accuracy of subsequent experiments.

[0165] Example 4:

[0166] Based on the same inventive concept, this application also provides a device for identifying adsorbed organic matter in clay minerals, which can be used to implement the method described in the above embodiments, as shown in the following embodiments. Since the principle of the device for identifying adsorbed organic matter in clay minerals is similar to that of the method for identifying adsorbed organic matter in clay minerals, the implementation of the device for identifying adsorbed organic matter in clay minerals can refer to the implementation of the method for identifying adsorbed organic matter in clay minerals, and repeated details will not be elaborated further. As used below, the terms "unit" or "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0167] The present invention provides a specific embodiment of a clay mineral adsorption organic matter identification device capable of realizing a method for identifying adsorbed organic matter in clay minerals. See [link to specific embodiment]. Figure 10 A device for identifying adsorbed organic matter in clay minerals, comprising:

[0168] Particle acquisition module 10 is used to acquire clay mineral particles from rock samples;

[0169] The spectrum acquisition module 20 is used to perform X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns.

[0170] The adsorbed organic matter identification module 30 is used to identify the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay mineral in the form of a natural complex.

[0171] In some embodiments of the present invention, the adsorbed organic matter identification module includes:

[0172] An adsorbed organic matter identification unit is used to identify the adsorbed organic matter based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

[0173] In some embodiments of the present invention, the particle acquisition module includes:

[0174] A suspension preparation unit is used to prepare a suspension of clay mineral particles based on the rock sample fragments and deionized water.

[0175] A particle acquisition unit is used to ultrasonically vibrate the suspension to obtain the clay mineral particles.

[0176] In some embodiments of the present invention, a clay mineral adsorption organic matter identification device further includes:

[0177] A circulation operation module is used to perform the following circulation operation until the liquid at the top of the suspension is clear: the circulation operation module includes:

[0178] The ionized water addition unit is used to add ionized water to the suspension after ultrasonic vibration.

[0179] The stirring and stabilizing unit is used for stirring and stabilizing for a preset time.

[0180] In some embodiments of the present invention, the particle acquisition unit includes:

[0181] A top liquid extraction unit is used to extract the top liquid from the clear suspension.

[0182] A top liquid centrifuge unit is used to centrifuge the top liquid to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

[0183] In some embodiments of the present invention, the stirring direction is either counterclockwise or clockwise.

[0184] In some embodiments of the present invention, the spectrum acquisition module includes:

[0185] Multiple spectrogram acquisition units are used to perform X-ray diffraction on the clay mineral particles by heating.

[0186] As described above, embodiments of the present invention provide an adsorbed organic matter identification device for clay minerals, comprising: a particle acquisition module for acquiring clay mineral particles from a rock sample; a spectrum acquisition module for performing X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; and an adsorbed organic matter identification module for identifying the adsorbed organic matter of the clay minerals based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay minerals in the form of a natural complex.

[0187] In summary, the clay mineral adsorption organic matter identification device provided by the embodiments of the present invention, on the one hand, differs from the hydrogen peroxide and acid-base solution methods in the prior art. The present invention ensures that the clay mineral complex is fully separated from other components, while avoiding the problems of the clay mineral adsorbed organic matter being destroyed and other inorganic mineral crystals encapsulating organic matter being released. Therefore, it can greatly improve the accuracy of subsequent experiments.

[0188] On the other hand, the present invention selects heated X-ray diffraction analysis to identify the presence of clay minerals adsorbed organic matter, effectively ensuring that the natural complex formed by clay minerals and organic matter is effectively extracted.

[0189] Example 5:

[0190] This application also provides a specific implementation of an electronic device capable of implementing all steps in the above-described method for identifying adsorbed organic matter from clay minerals. See [link to implementation details]. Figure 11 The electronic devices specifically include the following:

[0191] Processor 1201, memory 1202, communications interface 1203, and bus 1204;

[0192] The processor 1201, memory 1202, and communication interface 1203 communicate with each other via bus 1204; the communication interface 1203 is used to realize information transmission between server-side devices and client-side devices and other related devices.

[0193] The processor 1201 is used to call the computer program in the memory 1202. When the processor executes the computer program, it implements all the steps in the method for identifying adsorbed organic matter from clay minerals in the above embodiments. For example, when the processor executes the computer program, it implements the following steps:

[0194] The rock sample of the target argillaceous limestone obtained in advance is subjected to component separation to obtain the carbonate component and argillaceous component in the rock sample;

[0195] Obtain clay mineral particles from rock samples;

[0196] X-ray diffraction was performed on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns;

[0197] The adsorbed organic matter of the clay minerals was identified based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter was adsorbed onto the clay minerals in the form of a natural complex.

[0198] In some embodiments of the present invention, identifying the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns includes:

[0199] The adsorbed organic matter is identified based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

[0200] In some embodiments of the present invention, the clay mineral particles used to obtain the rock sample include:

[0201] A suspension of the clay mineral particles was prepared based on the rock sample fragments and deionized water.

[0202] The suspension is subjected to ultrasonic vibration to obtain the clay mineral particles.

[0203] In some embodiments of the present invention, after ultrasonically agitating the suspension, the method further includes:

[0204] Perform the following cycle until the liquid at the top of the suspension is clear:

[0205] Add deionized water to the suspension after ultrasonic vibration;

[0206] Stir and let stand for the preset time.

[0207] In some embodiments of the present invention, obtaining the clay mineral particles includes:

[0208] The top liquid is extracted as the top liquid of the suspension in the clarified state;

[0209] The top liquid is centrifuged to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

[0210] In some embodiments of the present invention, the stirring direction is either counterclockwise or clockwise.

[0211] In some embodiments of the present invention, the X-ray diffraction of the clay mineral particles at different temperatures includes:

[0212] The clay mineral particles were subjected to X-ray diffraction by heating.

[0213] Example 6:

[0214] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the method for identifying adsorbed organic matter in clay minerals as described in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the method for identifying adsorbed organic matter in clay minerals as described in the above embodiments. For example, when the processor executes the computer program, it implements the following steps:

[0215] Obtain clay mineral particles from rock samples;

[0216] X-ray diffraction was performed on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns;

[0217] The adsorbed organic matter of the clay minerals was identified based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter was adsorbed onto the clay minerals in the form of a natural complex.

[0218] In some embodiments of the present invention, identifying the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns includes:

[0219] The adsorbed organic matter is identified based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

[0220] In some embodiments of the present invention, the clay mineral particles used to obtain the rock sample include:

[0221] A suspension of the clay mineral particles was prepared based on the rock sample fragments and deionized water.

[0222] The suspension is subjected to ultrasonic vibration to obtain the clay mineral particles.

[0223] In some embodiments of the present invention, after ultrasonically agitating the suspension, the method further includes:

[0224] Perform the following cycle until the liquid at the top of the suspension is clear:

[0225] Add deionized water to the suspension after ultrasonic vibration;

[0226] Stir and let stand for the preset time.

[0227] In some embodiments of the present invention, obtaining the clay mineral particles includes:

[0228] The top liquid is extracted as the top liquid of the suspension in the clarified state;

[0229] The top liquid is centrifuged to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

[0230] In some embodiments of the present invention, the stirring direction is either counterclockwise or clockwise.

[0231] In some embodiments of the present invention, the X-ray diffraction of the clay mineral particles at different temperatures includes:

[0232] The clay mineral particles were subjected to X-ray diffraction by heating.

[0233] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, hardware + program embodiments are relatively simple in description because they are fundamentally similar to method embodiments; relevant parts can be referred to the descriptions in the method embodiments.

[0234] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0235] While this application provides method operation steps as shown in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only execution order. In actual device or client product execution, the method can be executed sequentially as shown in the embodiments or drawings, or in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0236] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing the embodiments of this specification, the functions of each module can be implemented in one or more software and / or hardware components, or a module that performs the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0237] Those skilled in the art will also know that, besides implementing the controller using purely computer-readable program code, the same functions can be achieved by logically programming the method steps, making the controller function as logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers (PLCs), and embedded microcontrollers. Therefore, such a controller can be considered a hardware component, and the devices within it used to implement various functions can also be considered structures within that hardware component. Alternatively, the devices used to implement various functions can be considered as both software modules implementing the method and structures within a hardware component.

[0238] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0239] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0240] 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 describing the differences from other embodiments. In particular, system embodiments are basically similar to method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments in this specification. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0241] The above description is merely an embodiment of the present specification and is not intended to limit the embodiments of the present specification. For those skilled in the art, various modifications and variations can be made to the embodiments of the present specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the embodiments of the present specification should be included within the scope of the claims of the embodiments of the present specification.

Claims

1. A method for identifying adsorbed organic matter in clay minerals, characterized in that, include: Obtain clay mineral particles from rock samples; X-ray diffraction was performed on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns; The adsorbed organic matter of the clay minerals was identified based on the multiple X-ray diffraction patterns; wherein the adsorbed organic matter was adsorbed onto the clay minerals in the form of a natural complex.

2. The method for identifying adsorbed organic matter according to claim 1, characterized in that, Identify the adsorbed organic matter of the clay minerals based on the multiple X-ray diffraction patterns, including: The adsorbed organic matter is identified based on the characteristics of the d001 peak in multiple X-ray diffraction patterns corresponding to different temperatures; wherein, multiple temperatures correspond one-to-one with multiple X-ray diffraction patterns.

3. The method for identifying adsorbed organic matter according to claim 1, characterized in that, The clay mineral particles used to obtain the rock sample include: A suspension of the clay mineral particles was prepared based on the rock sample fragments and deionized water. The suspension is subjected to ultrasonic vibration to obtain the clay mineral particles.

4. The method for identifying adsorbed organic matter according to claim 3, characterized in that, After ultrasonically agitating the suspension, the process further includes: Perform the following cycle until the liquid at the top of the suspension is clear: Add deionized water to the suspension after ultrasonic vibration; Stir and let stand for the preset time.

5. The method for identifying adsorbed organic matter according to claim 4, characterized in that, The process of obtaining the clay mineral particles includes: The top liquid is extracted as the top liquid of the suspension in the clarified state; The top liquid is centrifuged to obtain the clay mineral particles; wherein the particle size of the clay mineral particles is less than 2 micrometers.

6. The method for identifying adsorbed organic matter according to claim 4, characterized in that, The stirring direction is both counterclockwise and clockwise.

7. The method for identifying adsorbed organic matter according to any one of claims 1 to 6, characterized in that, The X-ray diffraction of the clay mineral particles at different temperatures includes: The clay mineral particles were subjected to X-ray diffraction by heating.

8. A device for identifying adsorbed organic matter in clay minerals, characterized in that, include: The particle acquisition module is used to acquire clay mineral particles from rock samples. The spectrum acquisition module is used to perform X-ray diffraction on the clay mineral particles at different temperatures to obtain multiple X-ray diffraction patterns. An adsorbed organic matter identification module is used to identify the adsorbed organic matter of the clay mineral based on the plurality of X-ray diffraction patterns; wherein the adsorbed organic matter is adsorbed onto the clay mineral in the form of a natural complex.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method for identifying adsorbed organic matter in clay minerals as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method for identifying adsorbed organic matter in clay minerals as described in any one of claims 1 to 7.

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