A target zoning method and system for natural hydrogen resource exploration

Abstract

The application discloses a target area demarcation method and system for natural hydrogen resource exploration, and relates to the technical field of underground gas reservoir resource exploration; the method comprises the following steps: performing natural seismic tomography according to a natural hydrogen prospective area, and demarcating the range of a low-velocity area; and demarcating the range of a target area by acquiring the surface hydrogen seepage flux of the low-velocity area; the method is based on the principle that natural hydrogen seepage leads to a decrease in ground temperature, and uses remote sensing temperature measurement and distributed optical fiber ground temperature measurement technology to find natural hydrogen seepage (leakage), so that the theoretical basis is sufficient, the temperature measurement equipment and technology are mature, the positioning is accurate, the cost is low, the efficiency is high, and the effect is good; the method classifies natural hydrogen seepage into types, and point-shaped and linear (or string-shaped) seepage can form a gas reservoir, other seepage is difficult to form a reservoir, and the natural hydrogen exploration theory is improved.

Description

Technical Field

[0001] This invention discloses a target area delineation method and system for natural hydrogen resource exploration, relating to the field of underground gas reservoir resource exploration technology. Background Technology

[0002] Hydrogen is a carbon-free energy carrier that does not release greenhouse gases; its combustion only produces water and heat. The combustion of liquid hydrogen in air produces water as a byproduct, causing no environmental pollution, and the combustion itself does not produce carbon emissions. Compared to other commonly used fuels, hydrogen has a very high energy density per unit mass. For these reasons, hydrogen is considered a potential pathway to reduce dependence on high-carbon fuels and achieve carbon neutrality. Hydrogen is not only a clean energy source but also a crucial industrial raw material, widely used in petroleum, chemical, electronics, metallurgy, oils and fats, aerospace, and light industry. Currently, hydrogen is primarily synthetic, derived almost entirely from natural gas, petroleum, and coal, with a small amount from water electrolysis. Hydrogen produced through geological processes is called natural hydrogen.

[0003] Hydrogen is the most abundant element and the lightest gas in the universe, capable only of upward diffusion, and this diffusion is irreversible. At room temperature and pressure, it is 14.39 times lighter than air. Hydrogen has high thermal conductivity and high heat capacity, making it commonly used in industry for cooling specialized equipment; for example, large generators often employ a "water-hydrogen-hydrogen" cooling system. Hydrogen diffuses extremely rapidly; hydrogen on the ground escapes into outer space at a very high speed. Once hydrogen leaks from a container, it diffuses rapidly, causing a rapid decrease in concentration. Therefore, when hydrogen leaks, it is difficult to pinpoint the leak point beyond 0.2 meters. Hydrogen is non-toxic, colorless, odorless, and tasteless; it is highly flammable and combustible; the energy from the collision of two grains of sand can ignite hydrogen. The hydrogen flame is pale blue, almost invisible during the day, and the residue is water vapor. In summary, it is extremely difficult to detect natural hydrogen.

[0004] Many scholars at home and abroad have proposed methods for screening natural hydrogen prospective areas based on the "fairy circle" landform, but these methods are not applicable to areas with strong human alteration, such as farmland, urban industrial areas, and densely populated areas. Therefore, a target area delineation method and system for natural hydrogen resource exploration has been invented to solve the above problems.

[0005] Seismic exploration is a geophysical exploration method that utilizes the differences in elasticity and density of underground media to infer the properties and morphology of underground rock strata by observing and analyzing the Earth's response to artificially induced seismic waves. Summary of the Invention

[0006] This invention addresses the problems of existing technologies by providing a method and system for target area delineation in natural hydrogen resource exploration. The technical solution adopted is as follows:

[0007] In a first aspect, a method for target area delineation in natural hydrogen resource exploration, the method comprising:

[0008] S1 uses natural hydrogen prospective areas to perform natural earthquake tomography to delineate the range of low-velocity zones;

[0009] S2 delineates the target area by obtaining the surface hydrogen permeation flux in the low-velocity zone;

[0010] S1, based on natural hydrogen prospective areas, performs natural earthquake tomography to delineate the range of low-velocity zones, including:

[0011] S11 uses remote sensing to detect abnormal surface temperatures based on natural hydrogen exploration areas.

[0012] S12 Based on the aforementioned abnormal surface temperature area, draw a contour map of infiltration concentration using a measuring network.

[0013] S13 Based on the aforementioned isopleth map of leakage concentration, the geological potential of the research area is screened through geological and geomorphological analysis.

[0014] S14 Based on the research area, the low-velocity region is delineated by tomographic inversion using volume wave arrival time information.

[0015] In some implementations, step S11 involves remotely sensing anomaly zones in surface temperature based on natural hydrogen prospective areas, specifically including:

[0016] S111 uses Landsat thermal infrared band data to retrieve the surface temperature of the natural hydrogen prospect area.

[0017] S112 Based on the surface temperature inversion, the surface temperature is quantitatively inverted by performing a radiative transfer equation algorithm on the remote sensing image using a radiative equation algorithm to obtain the surface temperature.

[0018] S113 Based on the surface temperature, the surface temperature is superimposed through the structure of the natural hydrogen prospect area to obtain a surface temperature isoline map.

[0019] S114 Based on the surface temperature and ground temperature isoline map, the surface temperature anomaly zone is obtained by analysis.

[0020] In some implementations, S12, based on the surface geothermal anomaly area, draws a percolation concentration contour map through a measurement network, specifically including:

[0021] S121 sets the size and direction of the ground hydrogen leakage detection grid and measures the surface temperature anomaly area;

[0022] S122 Based on the surface geothermal anomaly zone, measurement data is obtained by setting the size of the ground hydrogen leakage detection network and the direction of the measurement line;

[0023] S123 obtains correction data through temperature and pressure correction based on the measured data;

[0024] S124 draws a contour map of leakage concentration based on the correction data and coordinate data.

[0025] In some implementations, the leakage concentration isoline graph includes diffuse leakage, point leakage, linear leakage, mesh leakage, and irregular leakage with a mixture of points and lines;

[0026] S13 Based on the point-like and line-like seepage, the amount of natural hydrogen seepage is obtained through the natural hydrogen reserve module, and the temperature and pressure data of the natural hydrogen reservoir are obtained through inversion.

[0027] In some implementations, S14 delineates the low-velocity region based on the study area using volume wave arrival time information through tomographic inversion, specifically including:

[0028] S141 Based on the study area, the three-dimensional velocity structure distribution of the study area is obtained by inverting the volume wave arrival time information;

[0029] S142 generates an initial velocity model based on the three-dimensional velocity structure distribution, and performs tomographic inversion using the initial velocity model to obtain an inverted velocity image;

[0030] S143 Based on the inverted velocity image, the first wave time is improved through tomographic quality control to delineate the low-velocity zone.

[0031] Secondly, embodiments of the present invention provide a target area delineation system for natural hydrogen resource exploration, the system comprising:

[0032] The first delineation module is used to perform natural earthquake tomography based on the natural hydrogen prospect area and delineate the range of the low velocity zone.

[0033] The second delineation module is used to delineate the target area by obtaining the surface hydrogen permeation flux in the low-velocity zone.

[0034] The first partitioning module includes:

[0035] The temperature remote sensing unit is used to detect abnormal geothermal areas on the Earth's surface through remote sensing based on natural hydrogen prospective areas.

[0036] The leakage detection unit is used to draw a contour map of leakage concentration based on the surface geothermal anomaly area through a measuring network.

[0037] The regional screening unit is used to screen research areas based on geological potential through geological features, according to the seepage concentration contour map.

[0038] The region division unit is used to delineate the low-velocity region based on the study region and through tomographic inversion using volume wave arrival time information.

[0039] In some implementations, the temperature remote sensing unit specifically includes:

[0040] The temperature processing subunit is used to retrieve the surface temperature based on natural hydrogen prospective areas using Landsat thermal infrared band data.

[0041] The surface temperature subunit is used to quantitatively invert the surface temperature from the remote sensing image using the radiation equation algorithm based on the surface temperature inversion;

[0042] The temperature line graph sub-unit is used to superimpose the surface temperature and the structure of the natural hydrogen prospect area based on the surface temperature to obtain a surface temperature and ground temperature isoline graph.

[0043] The anomaly detection subunit is used to analyze and obtain the surface temperature anomaly area based on the surface temperature and ground temperature isoline map.

[0044] In some implementations, the leakage detection unit specifically includes:

[0045] The leakage measurement subunit is used to set the size and direction of the measurement network for ground hydrogen leakage detection and to measure the surface temperature anomaly area.

[0046] The temperature measurement subunit is used to obtain measurement data based on the surface geothermal anomaly zone by setting the size of the ground hydrogen permeation detection network and the direction of the measurement line.

[0047] The temperature and pressure correction subunit is used to obtain correction data based on the measurement data through temperature and pressure correction;

[0048] The leakage detection subunit is used to draw a contour map of leakage concentration based on the correction data and coordinate data.

[0049] Thirdly, embodiments of the present invention provide an electronic device, including a memory and a processor, wherein the memory is used to store one or more computer instructions, wherein when the one or more computer instructions are executed by the processor, they implement the method described in the first aspect above.

[0050] Fourthly, embodiments of the present invention provide a computer storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, it implements the method described in the first aspect.

[0051] One or more embodiments of the present invention can bring at least the following beneficial effects:

[0052] The method of this invention is based on the principle that natural hydrogen leakage leads to a decrease in ground temperature. It uses remote sensing temperature measurement and distributed optical fiber ground temperature measurement technology to locate natural hydrogen leakage. The theoretical basis is sufficient, the temperature measurement equipment and technology are mature, the positioning is accurate, the cost is low, the efficiency is high, and the effect is good.

[0053] The method of this invention classifies natural hydrogen seepage into different types: point-like and linear (or beaded) seepage can form gas reservoirs, while other seepage is unlikely to form reservoirs, thus improving the theory of natural hydrogen exploration. 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 flowchart of a target area delineation method for natural hydrogen resource exploration provided by an embodiment of the present invention;

[0056] Figure 2 This is a block diagram of a target area delineation system for natural hydrogen resource exploration provided in an embodiment of the present invention. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0058] Example 1:

[0059] Figure 1 A flowchart of a target area delineation method for natural hydrogen resource exploration is shown, as follows: Figure 1 As shown in this embodiment, the target area delineation method for natural hydrogen resource exploration includes:

[0060] S1 uses natural hydrogen prospective areas to perform natural earthquake tomography to delineate the range of low-velocity zones;

[0061] The aforementioned natural hydrogen prospective area represents the opportunity study phase for natural hydrogen exploration, with a designated area typically ranging from 200 to 500 km². 2 This refers to geologically significant areas such as ancient sedimentary basins on the margins of stable Precambrian cratons, continental rift basins, plate collision zones, mid-ocean ridges, and ophiolite and peridotite areas. When soil layers are present, circular depressions formed by the leakage or discharge of natural hydrogen are called fairy circles. Volcanic reservoirs are favorable target areas for natural hydrogen exploration. In plate collision zones, deep-source magma migrates to the surface, becoming a carrier for hydrogen to migrate upwards from deep within the Earth, providing geological conditions for high hydrogen content development. Water in rock strata acts as a barrier for hydrogen, which almost always accumulates under the cover of a relatively large underground aquifer. By comprehensively considering regional metallogenic regularities and metallogenic geological backgrounds, metallogenic geological formations, and combining "physical, chemical, and remote sensing" data with geomorphic features of gas leakage, prospective areas for natural hydrogen exploration are selected.

[0062] Taking the natural hydrogen exploration in area M as an example, area M is located on the edge of the Sinian sedimentary basin in the North China Craton. It does not possess the traditional characteristics of oil and gas geology. The exposed strata are mainly Upper Proterozoic shallow metamorphic rocks, with the development of Cenozoic Quaternary and Mesozoic magmatic intrusive rocks. Volcanic activity continued in this area from the Pliocene to the Upper Pleistocene, producing eruptions of basic magma and forming eruptive basaltic basic rock flows. The presence of honeycomb-like thin-layered basalt indicates at least several short intermittent eruptions. The basalt is dark green, with uneven vesicular and amygdaloidal structures in the lower part and a denser and harder upper part, covering Proterozoic metamorphic rocks such as quartzite.

[0063] This region is a typical area in eastern China characterized by the thinnest extensional crust, deep gas recharge, shallowest uplift of low-velocity, high-conductivity soft fluids, intense recent tectonic activity, extremely significant mantle-derived basic magmatic volcanic activity with a very late occurrence (2 Ma), strong recent seismic activity, and well-developed extensional structures. It is one of the few centers on Earth where H2, C+CO2, CO, and CH4 are released, making it a promising area for the development and utilization of deep mantle-derived gas. Based on the regional metallogenic geological regularities and background, metallogenic geological formations, and combined with geophysical, chemical, and remote sensing data, as well as geomorphological features related to gas seepage, a natural hydrogen prospective area of ​​approximately 240 km² has been selected. 2 .

[0064] S2 delineates the target area by obtaining the surface hydrogen permeation flux in the low-velocity zone;

[0065] Among them, the natural hydrogen target area is the preliminary feasibility study stage for natural hydrogen exploration, and the delineated target area covers an area of ​​100 km². 2 Within 60-100km 2 Ideally, the target area screening criteria should include: remote sensing low geothermal anomaly areas, surface hydrogen detection high concentration anomaly areas, natural hydrogen potential areas, and low velocity areas in natural earthquake tomography P-wave velocity profiles.

[0066] Among them, areas with potential for natural hydrogen accumulation include deep fault zones, geological unit contact zones, active volcanic craters, and circular depressions (or "fairy circles").

[0067] Target areas refer to regions located in structurally favorable locations for natural hydrogen accumulation, possessing the geological conditions necessary for natural hydrogen formation, and presumed to contain natural hydrogen reservoirs. The basic criteria for selecting target areas are minimum area and maximum hydrogen reservoir content.

[0068] Furthermore, S1 uses natural seismic tomography based on the natural hydrogen prospective area to delineate the range of the low-velocity zone, including:

[0069] S11 uses remote sensing to detect abnormal surface temperatures based on natural hydrogen exploration areas.

[0070] S12 Based on the aforementioned abnormal surface temperature area, draw a contour map of infiltration concentration using a measuring network.

[0071] S13 Based on the aforementioned isopleth map of leakage concentration, the geological potential of the research area is screened through geological and geomorphological analysis.

[0072] S14 Based on the research area, the low-velocity region is delineated by tomographic inversion using volume wave arrival time information.

[0073] According to S11, remote sensing is used to locate geothermal anomaly areas; further, S11, based on natural hydrogen prospective areas, uses remote sensing to locate geothermal anomaly areas, specifically including:

[0074] S111 uses Landsat thermal infrared band data to retrieve the surface temperature of the natural hydrogen prospect area.

[0075] S112 Based on the surface temperature inversion, the surface temperature is quantitatively inverted by performing a radiative transfer equation algorithm on the remote sensing image using a radiative equation algorithm to obtain the surface temperature.

[0076] S113 Based on the surface temperature, the surface temperature is superimposed through the structure of the natural hydrogen prospect area to obtain a surface temperature isoline map.

[0077] S114 Based on the surface temperature and ground temperature isoline map, the surface temperature anomaly zone is obtained by analysis.

[0078] The Earth's deep interior contains abundant hydrogen, which is constantly being released outwards. As hydrogen rises and migrates, it comes into contact with rocks and fluids in the mantle and crust. Due to hydrogen's high heat capacity and thermal conductivity, the accumulation of natural hydrogen is accompanied by heat transfer, leading to significant changes in Earth's temperature. Zones of natural hydrogen leakage often exhibit distinct low-temperature anomalies.

[0079] By inverting surface temperature through thermal infrared remote sensing, information on large-scale natural hydrogen leakage can be obtained, and contour maps of surface temperature in the target area can be drawn to delineate low geothermal anomaly zones. Simultaneously, satellite imagery can be used to interpret various topographical features, such as circular depressions ("fairy circles") and linear structures like faults, that indicate natural hydrogen leakage or emission when soil layers are present, serving as auxiliary indicators for identifying natural hydrogen leakage. When low geothermal anomalies and high natural hydrogen concentration anomalies overlap well, these anomalies become direct indicators for locating natural hydrogen.

[0080] Landspot temperature was retrieved from the selected natural hydrogen prospective area using Landsat thermal infrared band data. The remote sensing images used were two Landsat 7ETM+ images, including atmospheric sounding data, surface air temperature, relative humidity and other data corresponding to the two images.

[0081] Remote sensing technology offers various algorithms for retrieving land surface temperature, including the radiation equation algorithm, split-window algorithm, single-window algorithm, single-channel algorithm, and multi-channel algorithm, each with its own advantages and disadvantages. This work selects the radiation equation algorithm, which requires only three basic parameters: vegetation cover, surface emissivity, and radiance. Multi-temporal data are used to quantitatively retrieve the true land surface temperature using the radiation transfer equation algorithm.

[0082] The surface brightness, equivalent atmospheric temperature, atmospheric transmittance, and emissivity were calculated above, and then the actual surface temperature was obtained. Linear and ring structures such as faults in the natural hydrogen prospective area were overlaid in GIS software to generate a surface temperature and geothermal isopleth map. Comparative analysis showed that the northwest region, approximately 88 km... 2 The thermal infrared remote sensing images all show relatively low temperature values, mostly along the control direction of active faults, especially at the intersections of active faults, where the temperature anomalies are particularly obvious, suggesting that the low temperature anomalies at the surface may be caused by the rupture of underground gas channels rising to the shallow layers. However, no circular depressions formed by natural hydrogen leakage were observed.

[0083] Natural hydrogen seepage detection is performed according to S12; furthermore, S12 involves drawing a contour map of seepage concentration based on the aforementioned abnormal surface temperature areas using a measurement network, specifically including:

[0084] S121 sets the size and direction of the ground hydrogen leakage detection grid and measures the surface temperature anomaly area;

[0085] S122 Based on the surface geothermal anomaly zone, measurement data is obtained by setting the size of the ground hydrogen leakage detection network and the direction of the measurement line;

[0086] S123 obtains correction data through temperature and pressure correction based on the measured data;

[0087] S124 draws a contour map of leakage concentration based on the correction data and coordinate data.

[0088] Hydrogen is the smallest molecule in the universe, and it can diffuse through containers made of steel, plastic, and many other materials. Therefore, hydrogen's strong permeability poses a challenge to high-pressure hydrogen storage. Naturally occurring hydrogen formed deep within the Earth's crust migrates from the depths to the surface under the influence of forces such as chemical potential gradients, concentration gradients, temperature gradients, and pressure gradients. This process results in the seepage and diffusion of natural hydrogen on the surface, and its escape into the outer atmosphere.

[0089] Surface hydrogen leakage detection provides an efficient, convenient, and sensitive method for finding natural hydrogen. Hydrogen detectors can quickly detect surface hydrogen leaks. Surface hydrogen detection is not limited by the presence or absence of soil layers. Hydrogen concentration can be detected on any terrain feature except for bodies of water.

[0090] Ground hydrogen leakage detection is conducted using a specific survey network. The survey lines are laid perpendicular to the main geological structures within the target area. After temperature and pressure corrections, the measurement data can be used to create a contour map of the natural hydrogen concentration on the ground in the target area, delineating areas of abnormal hydrogen concentration. High concentration anomalies in hydrogen leakage serve as one of the bases for delineating natural hydrogen survey areas and conducting further investigations.

[0091] Based on the contour maps of natural hydrogen leakage concentration, it can be divided into five types: diffuse leakage, point leakage, linear leakage, network leakage, and irregular leakage consisting of a mixture of points and lines. Among them, point leakage and linear leakage are closely related to natural hydrogen accumulation, and the amount of natural hydrogen leakage can be calculated using models to infer the temperature and pressure of the natural hydrogen reservoir.

[0092] Hydrogen leakage detection instruments use portable pump-suction hydrogen detectors. Ground hydrogen concentration is greatly affected by wind force; to reduce the false alarm rate, a windproof cone-shaped integrating gas collection hood needs to be installed at the gas sampling end.

[0093] Furthermore, the leakage concentration isoline graph includes diffuse leakage, point leakage, linear leakage, network leakage, and irregular leakage with mixed points and lines.

[0094] S13 Based on the point-like and line-like seepage, the amount of natural hydrogen seepage is obtained through the natural hydrogen reserve module, and the temperature and pressure data of the natural hydrogen reservoir are obtained through inversion.

[0095] The geological potential for natural hydrogen deposits is evaluated through a specialized natural hydrogen mapping project. This work is conducted according to the requirements of a 1:50,000 mineral geological survey, focusing on various fault structures (especially active structures), geological unit contact zones, active volcanic craters, and circular and near-elliptical depressions (or "fairy circles")—geological and geomorphological phenomena related to natural gas leakage. Smaller faults and typical geological phenomena such as fairy circles and active structures are magnified on the map.

[0096] Furthermore, S14, based on the research region, performs tomographic inversion using volume wave arrival time information to delineate the low-velocity region, specifically including:

[0097] S141 Based on the study area, the three-dimensional velocity structure distribution of the study area is obtained by inverting the volume wave arrival time information;

[0098] S142 generates an initial velocity model based on the three-dimensional velocity structure distribution, and performs tomographic inversion using the initial velocity model to obtain an inverted velocity image;

[0099] S143 Based on the inverted velocity image, the first wave time is improved through tomographic quality control to delineate the low-velocity zone.

[0100] Ground hydrogen leakage detection was conducted using a 10×100m survey network. The survey lines were oriented NW 310°, perpendicular to the direction of the main faults in the area. To ensure the reliability of the measurement data, the data were recorded in a dedicated paper field logbook. When recording, the work area name, time, location, instrument number, and weather information were filled in at the top of each page. For each measuring point, the following information was recorded: survey line / point number, coordinates, hydrogen concentration, temperature, air pressure, humidity, wind speed, topographic location, and geological overview.

[0101] After the measurement was completed, 10% of the total number of measurement points were used for re-measurement at the same locations in the high hydrogen concentration area. The quality of the re-measurement met the design requirements.

[0102] Calculate the average value using the data volume corrected for humidity, temperature, and air pressure. The standard deviation (σ) was calculated, with C+3σ used as the lower limit of anomalies. The corrected measurement data and coordinates were imported into relevant software to generate a natural hydrogen leakage concentration distribution map, identifying seven bead-like ground hydrogen leakage anomalies. On-site verification of the anomalies revealed no interference from hydrogen refueling stations or other sources in the anomaly distribution areas, but the locations generally coincided with the F6 active fault. Therefore, the natural hydrogen leakage in this area is classified as linear leakage caused by an active fault.

[0103] The northwest section, approximately 88km, was completed according to the design. 2 A 1:50,000 mineral geological survey was conducted, focusing on the activity of various fault structures. Local basalt sills and granite porphyry dikes were observed, and the shallow metamorphic strata dipped gently, mostly near horizontal. Comprehensive research indicates that the area possesses the geological conditions for finding natural hydrogen, and has significant geological potential for natural hydrogen deposits.

[0104] To obtain the deep tectonic structure and source-reservoir-caprock, transport, and conservation conditions of region M, the three-dimensional P-wave velocity structure of region M was obtained by inverting the double-difference tomography method using seismic observation data of region M and its surrounding areas since 2008. The horizontal velocity structure shows significant lateral heterogeneity in the middle and upper crustal P-wave velocity structure of region M. Vertical profile A shows significant lateral undulations in the velocity structure of the middle and upper crust. The central part of the profile contains numerous igneous intrusive bodies and the rock fracture zone of the F3 fault, with transitional zones from depression to uplift on both sides. The northwestern part shows significant uplift of the Upper Proterozoic crystalline basement. Profile B shows a large, irregularly shaped continuous low-velocity zone distributed in the middle and upper crust below the F6 fault. Generally, a low P-wave velocity indicates a fractured rock mass or the presence of liquid or gaseous substances in the rock fractures, resulting in weak compressive strength and a tendency to form energy release channels. The continuous low-velocity zone is presumed to be a basal granitic fractured zone (layer) conducive to natural hydrogen accumulation. Comprehensive analysis shows that the distribution of the low-velocity zone roughly coincides with the low geothermal anomaly zone and the surface high hydrogen concentration anomaly, with an overlap area of ​​approximately 11.6 km². 2 .

[0105] Example 2:

[0106] Figure 2 A block diagram of a target area delineation system for natural hydrogen resource exploration is shown, as follows: Figure 2 As shown, the target area delineation system for natural hydrogen resource exploration provided in this embodiment includes:

[0107] The first delineation module is used to perform natural earthquake tomography based on the natural hydrogen prospect area and delineate the range of the low velocity zone.

[0108] The second delineation module is used to delineate the target area by obtaining the surface hydrogen permeation flux in the low-velocity zone.

[0109] The first partitioning module includes:

[0110] The temperature remote sensing unit is used to detect abnormal geothermal areas on the Earth's surface through remote sensing based on natural hydrogen prospective areas.

[0111] The leakage detection unit is used to draw a contour map of leakage concentration based on the surface geothermal anomaly area through a measuring network.

[0112] The regional screening unit is used to screen research areas based on geological potential through geological features, according to the seepage concentration contour map.

[0113] The region division unit is used to delineate the low-velocity region based on the study region and through tomographic inversion using volume wave arrival time information.

[0114] Furthermore, the temperature remote sensing unit specifically includes:

[0115] The temperature processing subunit is used to retrieve the surface temperature based on natural hydrogen prospective areas using Landsat thermal infrared band data.

[0116] The surface temperature subunit is used to quantitatively invert the surface temperature from the remote sensing image using the radiation equation algorithm based on the surface temperature inversion;

[0117] The temperature line graph sub-unit is used to superimpose the surface temperature and the structure of the natural hydrogen prospect area based on the surface temperature to obtain a surface temperature and ground temperature isoline graph.

[0118] The anomaly detection subunit is used to analyze and obtain the surface temperature anomaly area based on the surface temperature and ground temperature isoline map.

[0119] Furthermore, the leakage detection unit specifically includes:

[0120] The leakage measurement subunit is used to set the size and direction of the measurement network for ground hydrogen leakage detection and to measure the surface temperature anomaly area.

[0121] The temperature measurement subunit is used to obtain measurement data based on the surface geothermal anomaly zone by setting the size of the ground hydrogen permeation detection network and the direction of the measurement line.

[0122] The temperature and pressure correction subunit is used to obtain correction data based on the measurement data through temperature and pressure correction;

[0123] The leakage detection subunit is used to draw a contour map of leakage concentration based on the correction data and coordinate data.

[0124] Example 3:

[0125] This embodiment also provides an electronic device, including a memory and a processor, wherein the memory is used to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement the method of Embodiment 1;

[0126] In practical applications, the processor can be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller unit (MCU), microprocessor, or other electronic components to execute the methods described in the above embodiments.

[0127] The method implemented in this embodiment is as described in Embodiment 1.

[0128] Example 4:

[0129] This embodiment also provides a computer storage medium, in which a computer program is stored, and when the computer program is executed by one or more processors, it implements the method of embodiment one.

[0130] The computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0131] The method implemented in this embodiment is as described in Embodiment 1.

[0132] In the several embodiments provided in this invention, it should be understood that the disclosed systems and methods can also be implemented in other ways. The system and method embodiments described above are merely illustrative.

[0133] It should be noted that, in this document, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0134] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for target area delineation in natural hydrogen resource exploration, characterized in that, The method includes: S1 uses natural hydrogen prospective areas to perform natural earthquake tomography to delineate the range of low-velocity zones; S2 delineates the target area by obtaining the surface hydrogen permeation flux in the low-velocity zone; S1, based on natural hydrogen prospective areas, performs natural earthquake tomography to delineate the range of low-velocity zones, including: S11 uses remote sensing to detect abnormal surface temperatures based on natural hydrogen exploration areas. S12 Based on the aforementioned abnormal surface temperature area, draw a contour map of infiltration concentration using a measuring network. S13 Based on the aforementioned isopleth map of leakage concentration, the geological potential of the research area is screened through geological and geomorphological analysis. S14 Based on the research area, the low-velocity region is delineated by tomographic inversion using volume wave arrival time information.

2. The method according to claim 1, characterized in that, S11, based on the natural hydrogen prospective area, identifies the surface temperature anomaly area through remote sensing, specifically including: S111 uses Landsat thermal infrared band data to retrieve the surface temperature of the natural hydrogen prospect area. S112 Based on the surface temperature inversion, the surface temperature is quantitatively inverted by performing a radiative transfer equation algorithm on the remote sensing image using a radiative equation algorithm to obtain the surface temperature. S113 Based on the surface temperature, the surface temperature is superimposed through the structure of the natural hydrogen prospect area to obtain a surface temperature isoline map. S114 Based on the surface temperature and ground temperature isoline map, the surface temperature anomaly zone is obtained by analysis.

3. The method according to claim 2, characterized in that, S12 Based on the aforementioned surface temperature anomaly area, a percolation concentration contour map is drawn using a survey network, specifically including: S121 sets the size and direction of the ground hydrogen leakage detection grid and measures the surface temperature anomaly area; S122 Based on the surface geothermal anomaly zone, measurement data is obtained by setting the size of the ground hydrogen leakage detection network and the direction of the measurement line; S123 obtains correction data through temperature and pressure correction based on the measured data; S124 draws a contour map of leakage concentration based on the correction data and coordinate data.

4. The method according to claim 3, characterized in that, The leakage concentration isoline graph includes diffuse leakage, point leakage, linear leakage, network leakage, and irregular leakage with mixed points and lines; S13 Based on the point-like and line-like seepage, the amount of natural hydrogen seepage is obtained through the natural hydrogen reserve module, and the temperature and pressure data of the natural hydrogen reservoir are obtained through inversion.

5. The method according to claim 4, characterized in that, S14 Based on the research area, low-velocity regions are delineated through tomographic inversion using body wave arrival time information, specifically including: S141 Based on the study area, the three-dimensional velocity structure distribution of the study area is obtained by inverting the volume wave arrival time information; S142 generates an initial velocity model based on the three-dimensional velocity structure distribution, and performs tomographic inversion using the initial velocity model to obtain an inverted velocity image; S143 Based on the inverted velocity image, the first wave time is improved through tomographic quality control to delineate the low-velocity zone.

6. A target area delineation system for natural hydrogen resource exploration, characterized in that, The system includes: The first delineation module is used to perform natural earthquake tomography based on the natural hydrogen prospect area and delineate the range of the low velocity zone. The second delineation module is used to delineate the target area by obtaining the surface hydrogen permeation flux in the low-velocity zone. The first partitioning module includes: The temperature remote sensing unit is used to detect abnormal geothermal areas on the Earth's surface through remote sensing based on natural hydrogen prospective areas. The leakage detection unit is used to draw a contour map of leakage concentration based on the surface geothermal anomaly area through a measuring network. The regional screening unit is used to screen research areas based on geological potential through geological features, according to the seepage concentration contour map. The region division unit is used to delineate the low-velocity region based on the study region and through tomographic inversion using volume wave arrival time information.

7. The system according to claim 6, characterized in that, The temperature remote sensing unit specifically includes: The temperature processing subunit is used to retrieve the surface temperature based on natural hydrogen prospective areas using Landsat thermal infrared band data. The surface temperature subunit is used to quantitatively invert the surface temperature from the remote sensing image using the radiation equation algorithm based on the surface temperature inversion; The temperature line graph sub-unit is used to superimpose the surface temperature and the structure of the natural hydrogen prospect area based on the surface temperature to obtain a surface temperature and ground temperature isoline graph. The anomaly detection subunit is used to analyze and obtain the surface temperature anomaly area based on the surface temperature and ground temperature isoline map.

8. The system according to claim 7, characterized in that, The leakage detection unit specifically includes: The leakage measurement subunit is used to set the size and direction of the measurement network for ground hydrogen leakage detection and to measure the surface temperature anomaly area. The temperature measurement subunit is used to obtain measurement data based on the surface geothermal anomaly zone by setting the size of the ground hydrogen permeation detection network and the direction of the measurement line. The temperature and pressure correction subunit is used to obtain correction data based on the measurement data through temperature and pressure correction; The leakage detection subunit is used to draw a contour map of leakage concentration based on the correction data and coordinate data.

9. An electronic device, characterized in that, The system includes a memory and a processor, the memory being used to store one or more computer instructions, wherein the one or more computer instructions, when executed by the processor, implement the method as described in any one of claims 1-5.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium contains a computer program that, when executed by a processor, is used to implement the method described in any one of claims 1-5.

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