Rapid comprehensive investigation method and system for natural hydrogen resources

Abstract

The invention discloses a rapid comprehensive survey method and system for natural hydrogen resources, and the method comprises the steps: rapidly delineating a prospective area through remote sensing and geochemical measurement, fusing aviation gravity and magnetism, earthquake, time-frequency electromagnetism and ground geological survey multi-source data, finding out the characteristics of hydrogen source rock, a migration channel, a reservoir stratum and a cover stratum through the integrated evaluation of source-communication-storage-cover, and carrying out the comprehensive survey of the natural hydrogen resources. A target area is optimized through multi-information fusion, drilling verification is carried out, and efficient exploration of natural hydrogen resources is achieved. According to the method, the potential of the natural hydrogen resource can be rapidly and accurately evaluated.

Description

Technical Field

[0001] This invention belongs to the field of natural hydrogen exploration technology, and in particular relates to a rapid and comprehensive survey method and system for natural hydrogen resources. Background Technology

[0002] Natural hydrogen, as a clean energy source, holds promise as a key energy source for global energy transition and carbon neutrality due to its potentially enormous resource potential and renewability. Research has found that natural hydrogen is widely distributed in the atmosphere, crust, mantle, and groundwater systems, primarily in ophiolite belts, cratonic basins, and rift valleys. With repeated detections of hydrogen on the surface and in wells worldwide, it has become a hot topic in global energy geology, and natural hydrogen exploration technology has become a key research area internationally, with many countries and regions conducting comprehensive surveys and evaluation studies. China possesses diverse and complex geological conditions, giving it the geological potential to explore natural hydrogen resources, and its natural hydrogen exploration prospects are broad. However, domestic research on natural hydrogen is still in the exploratory stage. Currently, there is only some accumulation of data on the distribution of natural hydrogen resources, but it has not yet been systematically studied as an independent energy source. The formation mechanism and distribution patterns of natural hydrogen are still unclear, and a comprehensive natural hydrogen exploration technology system has not yet been established. Therefore, it is urgent to intensify efforts in tackling key technologies for the coordinated exploration of natural hydrogen from air, land, and well, and to establish a comprehensive technical and methodological system for natural hydrogen surveys, so as to promote the in-depth development of comprehensive natural hydrogen surveys. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method and system for rapid and comprehensive survey of natural hydrogen resources. Specifically, the method for rapid and comprehensive survey of natural hydrogen resources includes: Based on remote sensing interpretation and geochemical measurements, the prospective area for natural hydrogen was delineated. Based on the aforementioned natural hydrogen prospective areas, through airborne gravity and magnetic surveys and ground geological surveys, basic to ultrabasic rocks and ferromagnetic basement were delineated, hydrogen generation capacity was assessed, and information on hydrogen source rocks was obtained; Based on the aforementioned natural hydrogen prospective areas, by integrating airborne gravity and magnetic inversion, seismic interpretation, and high-precision remote sensing interpretation, deep and shallow faults are identified, and information on natural hydrogen migration channels is obtained. Based on the aforementioned natural hydrogen prospective areas, geological surveys and seismic interpretations are used to identify the dominant reservoir lithology, physical properties, and spatial distribution patterns to obtain information on natural hydrogen reservoirs. Based on the natural hydrogen prospective area, geological surveys, seismic interpretation and time-frequency electromagnetic detection are used to identify the three-dimensional spatial distribution and sealing capacity of the dominant cap layer, and to obtain information on the sealing capacity of the natural hydrogen cap layer. Based on the information on hydrogen source rocks, natural hydrogen migration channels, natural hydrogen reservoirs, and caprocks, multi-information fusion is performed to delineate the target areas for natural hydrogen accumulation. Based on the stated natural hydrogen reservoir target area, drilling operations will be carried out to verify anomalies and obtain results on the potential of natural hydrogen resources.

[0004] Preferably, the process of delineating natural hydrogen prospective areas includes: Based on remote sensing images, the distribution and characteristics of fairy rings and shallow fractures are identified, and the identification results are obtained; Based on the identification results, soil gas collection and composition determination were carried out to obtain shallow hydrogen concentration data. Based on the coupling relationship between the Fairy Ring, shallow fracture distribution and hydrogen concentration data, spatial statistical analysis was conducted to delineate high-concentration anomaly zones and define potential areas for natural hydrogen.

[0005] Preferably, the process of obtaining hydrogen source rock information includes: Based on airborne gravity and magnetic data, the depth, scale, occurrence, and distribution characteristics of basic to ultrabasic rocks and ferromagnetic basement were obtained through potential field transformation and anomaly separation. Based on the depth, scale, occurrence, and distribution characteristics of the basic-ultrabasic rocks and ferromagnetic basement, a ground route survey, profile measurement, and sampling were conducted. Rock and gas samples were collected, and hydrogen generation capacity was assessed and hydrogen source rock information was obtained through isotope geochemical analysis and high-temperature and high-pressure experiments.

[0006] Preferably, the process of obtaining information on natural hydrogen transport channels includes: Based on the aforementioned natural hydrogen prospective area, the occurrence, scale, and spatial distribution of hidden deep faults are identified by using airborne gravity and magnetic inversion results and seismic profile interpretation. Based on remote sensing data, identify the attitude, scale, and spatial distribution of shallow faults; Based on the occurrence, scale, and spatial distribution of concealed deep and large faults and shallow faults, we will conduct exploration and verification through ground geological surveys to construct the correlation between deep and large faults and shallow faults in terms of spatial location, evolution, and geological event causes, establish spatiotemporal coupling relationships, identify natural hydrogen migration channels, and obtain information on natural hydrogen migration channels.

[0007] Preferably, the process of obtaining information about natural hydrogen reservoirs includes: Based on the aforementioned natural hydrogen prospective area, a surface geological survey was conducted, including sedimentary facies analysis and reservoir property measurement. Combined with route surveys and profile measurements, information on reservoir lithology, physical properties, and spatial distribution was obtained. Based on seismic profile data, the sedimentary filling sequence of hydrogen-bearing strata was reconstructed, and the zoning characteristics of thick clastic reservoirs were identified. Identify lithological interfaces based on differences in seismic wave reflection rates to obtain deep lithological stratification and attitude; Based on reservoir lithology, physical properties, spatial distribution information, as well as deep lithological stratification and occurrence, the distribution patterns of dominant reservoirs are clarified, and information on natural hydrogen reservoirs is obtained.

[0008] Preferably, the process of obtaining information about the natural hydrogen cap layer includes: Based on the aforementioned natural hydrogen prospective area, the porosity, water content, density, homogeneity, and thickness parameters of the dense rock layer were collected through geological surveys to screen for advantageous caprocks; Based on the interpretation of seismic profiles, identify the lithological zoning characteristics of the dominant caprock and evaluate its spatial distribution and sealing capacity. Based on time-frequency electromagnetic data, the lateral distribution and burial depth information of the caprock are obtained, and a caprock property model is constructed to obtain the three-dimensional distribution range of the dominant caprock. Information on the natural hydrogen capping layer is obtained based on the three-dimensional spatial distribution and capping capacity of the dominant capping layer.

[0009] Preferably, the process of delineating natural hydrogen reservoir target areas includes: Based on the four major hydrocarbon accumulation elements—natural hydrogen prospective areas, hydrogen source rocks, migration channels, reservoirs, and caprocks—the spatial coupling relationships of these elements are determined, natural hydrogen accumulation target areas are delineated, and an integrated geological model of "source-channel-reservoir-caprock" is constructed.

[0010] Preferably, the process of conducting drilling operations based on the natural hydrogen target area to verify anomalies and obtain results on the potential of natural hydrogen resources includes: Based on the geological model, optimize well location deployment, conduct drilling, and obtain core and soil gas samples; Based on the core and soil gas samples, hydrogen content detection, reservoir properties and caprock sealing evaluation were carried out to verify anomalies and evaluate resource potential, and to obtain results on the potential of natural hydrogen resources.

[0011] This invention also provides a rapid and comprehensive survey system for natural hydrogen resources, comprising: The prospective area delineation module is used to delineate the prospective areas of natural hydrogen based on remote sensing interpretation and geochemical measurement results; The hydrogen source rock research module is used to delineate basic to ultrabasic rocks and ferromagnetic basement based on the natural hydrogen prospective areas through airborne gravity and magnetic surveys and ground geological surveys, assess hydrogen generation capacity, and obtain hydrogen source rock distribution information; The migration channel research module is used to identify deep and shallow faults and obtain information on natural hydrogen migration channels based on the natural hydrogen prospective area, by integrating airborne gravity and magnetic inversion, seismic interpretation and high-precision remote sensing interpretation. The reservoir research module is used to obtain natural hydrogen reservoir information based on the natural hydrogen prospect area through geological surveys and seismic interpretation. The caprock research module is used to obtain information on the natural hydrogen caprock based on the natural hydrogen prospective area using geological surveys, seismic interpretation, and time-frequency electromagnetic detection. The target area selection module is used to perform multi-information fusion based on the hydrogen source rock information, migration channel information, reservoir information and caprock information to delineate natural hydrogen accumulation target areas; The drilling verification module is used to carry out drilling operations based on the natural hydrogen reservoir target area, verify anomalies, and obtain results on the potential of natural hydrogen resources. Compared with the prior art, the present invention has the following advantages and technical effects: This invention addresses the current lack of a systematic technical methodology in the field of natural hydrogen exploration. For the first time, it constructs a complete, systematic, and efficient comprehensive technical methodology system for natural hydrogen exploration. This system uses two prominent surface markers—fairy circles and shallow faults—as rapid screening criteria. It innovatively proposes four "exploration elements" for natural hydrogen resource evaluation: "source-channel-reservoir-caprock." It comprehensively utilizes six "effective technical means" and establishes a multi-level exploration logic from macro to micro and from surface to subsurface, providing an important methodological foundation for the establishment of the discipline of natural hydrogen exploration.

[0012] At the technical level, this invention organically integrates six major categories of technical means, including remote sensing, geophysics, geochemistry and geological survey, forming a multi-scale and multi-disciplinary collaborative exploration scheme. It enables the effective identification, spatial coupling analysis and quantitative evaluation of key hydrocarbon-forming elements such as deep hydrogen source rocks, migration channels, reservoirs and caprocks, and significantly overcomes the industry problem of multiple solutions of single technical methods.

[0013] The technical system of this invention is both forward-looking and practical. Its application will greatly improve the efficiency of delineating prospective areas and the accuracy of target area selection. It will not only enable accurate assessment of the potential of natural hydrogen resources, but also provide indispensable core technical support and decision-making basis for promoting exploration breakthroughs and commercial development of this emerging strategic energy. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the method flow according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the system structure according to an embodiment of the present invention. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0017] Example 1 like Figure 1 As shown, this embodiment provides a rapid and comprehensive survey method for natural hydrogen resources, including: Based on remote sensing interpretation and geochemical measurement results, the potential areas for natural hydrogen can be quickly delineated. Based on the natural hydrogen prospective area, through airborne gravity and magnetic surveys and ground geological surveys, basic to ultrabasic rocks and ferromagnetic basement were delineated, their hydrogen generation capacity was assessed, and information on hydrogen source rocks was obtained; Based on the natural hydrogen prospective area, by integrating airborne gravity and magnetic inversion, seismic interpretation and high-precision remote sensing interpretation, deep and shallow faults are identified and information on natural hydrogen migration channels is obtained. Based on the natural hydrogen prospective area, through geological surveys and seismic interpretation, we identify the dominant reservoir lithology, physical properties and spatial distribution patterns to obtain information on natural hydrogen reservoirs; Based on the natural hydrogen prospective area, geological surveys, seismic interpretation, and time-frequency electromagnetic detection are used to identify the three-dimensional spatial distribution and sealing capacity of the dominant caprock and obtain information on the natural hydrogen caprock. Based on information on hydrogen source rocks, migration channels, reservoirs, and caprocks, multi-information fusion is performed to delineate natural hydrogen accumulation target areas; Based on the target area for natural hydrogen accumulation, drilling projects will be carried out to verify anomalies and obtain results on the potential of natural hydrogen resources.

[0018] Furthermore, the process of delineating natural hydrogen prospective areas includes: Based on remote sensing images, the distribution and characteristics of fairy rings and shallow fractures are identified, and the identification results are obtained; Based on the identification results, soil gas collection and composition determination were carried out to obtain shallow hydrogen concentration data. Based on the coupling relationship between the distribution of fairy rings and shallow fractures and hydrogen concentration data, spatial statistical analysis was conducted to delineate high-concentration anomaly areas and delineate natural hydrogen prospective areas.

[0019] Furthermore, this embodiment addresses the rapid delineation of prospective areas by comprehensively utilizing remote sensing interpretation and geochemical measurement techniques to rapidly scan and screen the study area, initially delineating natural hydrogen prospective areas. Specifically, it includes: Based on the fairy circle landforms often formed by the escape of natural hydrogen and their correlation with shallow faults, the focus is on interpreting high-resolution remote sensing images to identify the distribution and characteristics of fairy circles and shallow faults.

[0020] Within key areas identified through remote sensing interpretation, soil gas collection and composition analysis were conducted in conjunction with geological data to obtain hydrogen concentration data in shallow strata. A comprehensive analysis of the coupling relationship between the Andromeda Galaxy distribution and geochemical anomaly zones was performed to delineate potential areas for natural hydrogen.

[0021] As an optional implementation, in order to quickly identify potential areas of natural hydrogen in study area A, this embodiment utilizes remote sensing interpretation and natural hydrogen soil geochemical detection methods for rapid exploration.

[0022] Specifically, based on the spectral, textural, and shape features of the Gaofen-1 (GF-1) satellite remote sensing image data, remote sensing interpretation of the fairy circles and shallow faults in target area A was carried out, identifying m fairy circles with a range of hundreds to thousands of meters in size; and dividing the area into n shallow faults.

[0023] Based on geological data, focusing on areas with well-developed fairy circles and shallow faults, natural hydrogen soil gas collection and composition determination were carried out in target area A. Gas was primarily collected at a depth of approximately 80 cm below the surface, and carbon and hydrogen isotope analysis was conducted to identify the anomalous distribution of shallow natural hydrogen concentration in target area A. Based on the coupling relationship between fairy circles and the anomalous distribution of shallow natural hydrogen concentration, prospective natural hydrogen areas (B) were delineated.

[0024] Furthermore, the process of obtaining information about hydrogen source rocks includes: Based on airborne gravity and magnetic data, information on the depth, scale, occurrence, and distribution characteristics of basic to ultrabasic rocks and ferromagnetic basement was obtained; Based on the depth, scale, occurrence, and distribution characteristics of basic-ultrabasic rocks and ferromagnetic basements, ground route surveys, profile measurements, and sampling were conducted. Rock and gas samples were collected, and their hydrogen generation capacity was assessed through isotope geochemical analysis and high-temperature, high-pressure experiments to obtain information on hydrogen source rocks.

[0025] Furthermore, this embodiment, based on the delineated natural hydrogen prospective area, employs techniques such as airborne gravity and magnetic surveys and surface geological surveys to conduct exploration work targeting the "sources" of natural hydrogen accumulation elements. Here, "sources" refer to specific geological bodies (such as ophiolites, iron-rich basement formations, etc.) capable of producing hydrogen through mechanisms like water-rock reactions. By analyzing airborne gravity and magnetic data, the distribution of basic-ultrabasic rocks and ferromagnetic basements is quickly identified, the deep tectonic geological framework is inferred, and this inference is verified in conjunction with surface surveys.

[0026] More specifically, it includes the following steps: Airborne gravity and magnetic data were collected, and through processing such as potential field transformation and anomaly separation, information on the planar distribution of basic-ultrabasic rocks, ferromagnetic basement, and deep faults was obtained. The depth of basic-ultrabasic rocks and ferromagnetic basement was inverted, a deep three-dimensional geological structural framework was constructed, and the scale, occurrence information, and distribution characteristics of basic-ultrabasic rocks and ferromagnetic basement were analyzed.

[0027] Through ground route surveys, profile measurements, and sampling, the distribution range, lithological assemblage, and occurrence characteristics of basic-ultrabasic rocks and ferromagnetic basement inferred by airborne gravity and magnetic surveys were verified. In the high-concentration hydrogen anomaly zone within the prospective area, rock and gas samples were collected. Isotope geochemical analysis was used to determine the source of hydrogen, and high-temperature, high-pressure experimental simulations were conducted to study the coupling relationship between hydrogen generation efficiency and parameters such as the size and burial depth of the basic-ultrabasic rocks and ferromagnetic basement, assessing their hydrogen generation capacity and obtaining information on hydrogen source rocks.

[0028] As an optional implementation, this embodiment employs airborne gravity and magnetic surveys and ground geological surveys to conduct exploration work on the hydrogen source rocks of the natural hydrogen prospective area B, based on the delineated prospective area. The basic-ultrabasic rocks and ferromagnetic basement of the natural hydrogen prospective area B are considered to be highly promising hydrogen source rocks in the target area. By analyzing airborne gravity and magnetic data, the distribution of basic-ultrabasic rocks and ferromagnetic basement in this area is quickly identified, the deep tectonic and geological framework of the area is inferred, and the findings are verified in conjunction with ground surveys.

[0029] More specifically, by conducting airborne gravity and magnetic measurements in the natural hydrogen prospective area B, high-precision data was obtained. Through data processing such as potential field transformation and anomaly separation, the characteristics of local geological bodies and structural anomalies were highlighted. Through gravity and magnetic field zoning and local anomaly interpretation, the planar distribution characteristics of basic-ultrabasic rocks, ferromagnetic basement, and deep faults were inferred. Through 2.5D profile inversion and three-dimensional physical property inversion under constrained conditions, the depth of density interface was deduced, the depth of basic-ultrabasic rocks and ferromagnetic basement was calculated, a deep three-dimensional geological structural framework was constructed, and the occurrence of basic-ultrabasic rocks and ferromagnetic basement was analyzed.

[0030] The characteristics of basic-ultrabasic rocks and ferromagnetic basement exposed in Natural Hydrogen Prospect Area B were obtained through ground geological surveys, verifying the distribution of basic-ultrabasic rocks and ferromagnetic basement.

[0031] In the high-concentration hydrogen anomaly zone of Natural Hydrogen Prospect Area B, rock and gas samples were collected. The source of hydrogen was determined by isotopic geochemical analysis. Combined with high-temperature and high-pressure experimental simulation, the coupling relationship between hydrogen generation efficiency and parameters such as the size and burial depth of basic-ultrabasic rocks and ferromagnetic basement was studied to evaluate the hydrogen generation capacity of the hydrogen source rocks in Natural Hydrogen Prospect Area B and obtain information on the hydrogen source rocks.

[0032] Furthermore, the process of obtaining information on natural hydrogen transport pathways includes: Based on the results of airborne gravity and magnetic inversion and the interpretation of seismic profiles, the occurrence, scale and spatial distribution of hidden deep and large faults are identified. Based on remote sensing data, fine identification of shallow fractures was carried out, and the results were verified through ground geological surveys and geochronology. Based on the verification results, the spatiotemporal coupling relationship between deep and shallow fractures was established, migration channels were identified, and information on natural hydrogen migration channels was obtained.

[0033] More specifically, the process of obtaining natural hydrogen transport channel information in this embodiment includes: Airborne gravity and magnetic data inversion and seismic interpretation: By combining the results of airborne gravity and magnetic data inversion and seismic profile interpretation, we can identify hidden deep and large faults and accurately constrain their occurrence, scale and spatial distribution.

[0034] High-precision remote sensing interpretation and ground verification: Within the prospective area, more refined shallow fault identification is conducted based on high-resolution remote sensing data to obtain fault distribution characteristics and determine the level and sequence of fault structures. Ground geological surveys and geochronological analysis are then used to explore and verify the shallow structural features.

[0035] Establish spatial, evolutionary, and genetic relationships between deep and shallow faults to obtain information on natural hydrogen transport channels.

[0036] As an optional implementation, this embodiment integrates the results of airborne gravity and magnetic data inversion and seismic profile interpretation to identify basin boundary faults within the region in the airborne magnetic contour map of the natural hydrogen prospective area B, extending 10 km upwards. The fault anomaly information of some intracranial faults within the region gradually weakens with increasing upward extension. Then, through seismic profile interpretation, their occurrence, scale, and spatial distribution are precisely constrained.

[0037] Within the natural hydrogen prospective area, based on high-resolution remote sensing data, linear structures, landforms, and drainage markers are systematically interpreted to achieve precise identification and classification of shallow faults. Through surface geological surveys and geochronological analysis, the characteristics of shallow structures are explored and verified. Through comprehensive research, the spatial, evolutionary, and genetic relationships between deep and shallow faults are established, thereby obtaining information on natural hydrogen migration pathways.

[0038] Furthermore, the process of obtaining information about natural hydrogen reservoirs includes: Based on the natural hydrogen prospect area, sedimentary facies analysis and reservoir property measurement were carried out to obtain reservoir lithology, physical properties and spatial distribution information; Based on seismic profile data, the distribution of thick clastic reservoirs is identified, and the deep lithological stratification and occurrence are obtained. Information on natural hydrogen reservoirs is obtained based on reservoir lithology, physical properties, spatial distribution information, as well as deep lithological stratification and occurrence.

[0039] Furthermore, this embodiment focuses on the study of natural hydrogen "reservoirs" in prospective areas. Based on the delineated prospective areas, exploration work is carried out on the "reservoirs" among the natural hydrogen accumulation elements. Natural hydrogen reservoirs are mainly composed of clastic rocks. Specifically, they include: Priority will be given to deploying in areas where there are already obvious hydrogen indications. By combining methods such as sedimentary facies analysis and reservoir property measurement with route surveys and profile measurements, the reservoir lithology, physical properties and spatial distribution will be analyzed to reconstruct the lithofacies paleogeographic environment, and then to identify favorable reservoir lithologies and favorable facies zones for hydrocarbon accumulation.

[0040] Using seismic profile data, the sedimentary infill sequence of hydrogen-bearing strata was reconstructed, and the distribution of thick clastic reservoirs was identified. Lithological interfaces were identified by differences in seismic wave reflection characteristics, characterizing deep lithological stratification and occurrence, and clarifying the distribution patterns of dominant reservoirs.

[0041] As an optional implementation method, this embodiment conducts sedimentary facies analysis on area B of the natural hydrogen prospective area. Combining route surveys and profile measurements, it analyzes reservoir lithology, physical properties, and spatial distribution, reconstructs the lithofacies paleogeographic environment, and identifies favorable reservoir lithologies and favorable facies zones for hydrocarbon accumulation.

[0042] Using seismic profile data from area B of the natural hydrogen prospective area, the sedimentary filling sequence of hydrogen-bearing strata was reconstructed, and the distribution of thick sandstone reservoirs was identified. Lithological interfaces were identified through differences in seismic wave reflection characteristics, characterizing deep lithological stratification and occurrence, and clarifying the distribution patterns of dominant reservoirs. Natural hydrogen is mainly hosted in thick sandstone strata of a certain stratum.

[0043] Furthermore, the process of obtaining information about the natural hydrogen cap layer includes: Geological surveys were conducted to collect parameters such as porosity, water content, density, homogeneity, and thickness of dense rock layers to screen for advantageous caprocks. Based on the interpretation of seismic profiles, identify the lithological zoning characteristics of the dominant caprock and evaluate its spatial distribution and sealing capacity. Based on time-frequency electromagnetic data, the lateral distribution and burial depth information of the caprock were obtained, and a caprock property model was constructed to clarify the three-dimensional distribution range of the dominant caprock. Information on natural hydrogen caprocks is obtained based on the three-dimensional spatial distribution and capping capacity of the dominant caprock.

[0044] Furthermore, this embodiment, based on the study of the natural hydrogen "caprock" in the prospective area, conducts exploration work on the "caprock" in the natural hydrogen accumulation elements. The natural hydrogen caprock is generally a thick layer of mudstone, gypsum rock, carbonate rock, etc. Specifically, it includes: The system investigates the dense rock strata in the area, focusing on evaluating parameters such as porosity, permeability, homogeneity, and thickness, and screening for dominant caprocks and evaluating their sealing capacity. Based on seismic profile interpretation, the spatial distribution of dense cap layers is identified, and their sealing capacity is evaluated. Using time-frequency electromagnetic data, the lateral distribution and burial depth characteristics of the caprock are inverted. Combined with other information, a caprock property model is constructed to clarify the three-dimensional distribution range of the dominant caprock.

[0045] As an optional implementation, this embodiment systematically investigates a thick layer of dark mudstone in a certain stratum of the natural hydrogen prospective area B through geological survey, focusing on evaluating parameters such as porosity, permeability, homogeneity and thickness, screening for advantageous caprocks and evaluating their sealing capacity.

[0046] Based on seismic profile interpretation, the spatial distribution of dense caprocks such as thick dark mudstone is identified, and their sealing capacity is evaluated. Using time-frequency electromagnetic data, the lateral distribution and burial depth characteristics of the thick mudstone cap were inverted. Combined with other information, a cap physical property model was constructed to clarify the distribution of the thick mudstone in the three-dimensional space of the natural hydrogen prospective area B.

[0047] Furthermore, the process of delineating target areas for natural hydrogen accumulation includes: Based on the four major hydrocarbon accumulation elements—natural hydrogen prospective areas, hydrogen source rock information, migration channel information, reservoir information, and caprock information—the spatial coupling relationship of each element is determined, and natural hydrogen accumulation target areas are delineated.

[0048] Furthermore, this embodiment focuses on the delineation of natural hydrogen target areas. Based on the aforementioned multi-element exploration results encompassing "source, pathway, reservoir, and caprock," it conducts comprehensive prediction and optimization of natural hydrogen accumulation target areas. Specifically, this includes: Based on remote sensing imagery and natural hydrogen geochemistry, the coupling relationship between the distribution of Fairy Circles and shallow faults and hydrogen concentration data was identified, spatial statistical analysis was conducted, high-concentration anomaly zones were delineated, and natural hydrogen prospective areas were delineated. Based on airborne gravity and magnetic data, through potential field transformation and anomaly separation, the depth, scale, occurrence, and distribution characteristics of basic-ultrabasic rocks and ferromagnetic basement were delineated to obtain information on the distribution of hydrogen source rocks. High-temperature and high-pressure hydrogen generation simulation experiments were conducted on the collected samples to analyze the effects of parameters such as temperature, pressure, and water-rock ratio on hydrogen generation efficiency, establish geochemical identification markers for hydrogen source rocks, assess the hydrogen generation potential of hydrogen source rocks, and obtain information on hydrogen source rocks. Based on airborne gravity and magnetic surveys, seismic surveys, remote sensing, and geological surveys, the occurrence, scale, and spatial distribution of concealed deep and large faults and shallow faults are identified, and the spatiotemporal coupling relationship between the two is established to obtain information on natural hydrogen transport channels. Based on seismic, time-frequency electromagnetic, and geological surveys, identify the lithology, physical properties, and spatial distribution of dominant reservoirs to obtain information on natural hydrogen reservoirs; Based on earthquake, time-frequency electromagnetic and geological surveys, identify the dominant caprock lithology, physical properties and three-dimensional spatial distribution and sealing capacity, and obtain information on natural hydrogen caprock. By integrating information from multiple sources, we extract favorable indicators of various hydrocarbon accumulation elements, establish spatial coupling relationships, and then establish a natural hydrogen accumulation model and a comprehensive evaluation index system, thereby delineating natural hydrogen accumulation target areas.

[0049] As an optional implementation, this embodiment collects soil gas samples from target area A and conducts spatial statistical analysis on the measurement data to delineate the high-concentration hydrogen anomaly area. Combined with the geological background, fairy circles and fault distribution, the natural hydrogen prospective area B of target area A is delineated. Within the natural hydrogen prospective area B, by analyzing airborne gravity and magnetic data, the distribution of basic-ultrabasic rocks and ferromagnetic basement in the area was quickly identified, and verified by ground surveys. The basic-ultrabasic rocks and ferromagnetic basement were considered to be highly promising hydrogen source rocks, and information on the distribution of hydrogen source rocks was obtained. Then, high-temperature and high-pressure hydrogen generation simulation experiments were carried out on the basic-ultrabasic rock samples collected above to analyze the effects of parameters such as temperature, pressure, and water-rock ratio on hydrogen generation efficiency, establish geochemical identification markers for hydrogen source rocks, assess the hydrogen generation potential of the ferromagnetic basement of hydrogen source rocks, and obtain information on hydrogen source rocks. Based on the results of airborne gravity and magnetic data inversion, remote sensing, and seismic profile interpretation, basin boundary faults, intracranial faults, and shallow faults were identified, which together form a "broom-shaped" fault system, and good information on natural hydrogen transport channels was obtained. Based on seismic, time-frequency electromagnetic, and geological surveys, the lithology, physical properties, and spatial distribution of dominant reservoirs were identified to obtain information on natural hydrogen reservoirs. Hydrogen is mainly found in thick sandstone layers of a certain stratum, indicating that the area has favorable reservoir conditions. Based on earthquake, time-frequency electromagnetic, and geological surveys, a certain layer of thick dark mudstone is a dense and dominant caprock, and the area has good caprock conditions. Remote sensing interpretation and geochemical measurements were performed on target area A to delineate the potential area for natural hydrogen accumulation B. Further information on hydrogen source rocks was obtained through airborne gravity and magnetic data. Through various technical means, the four key elements of natural hydrogen accumulation were effectively identified, spatially coupled, and quantitatively evaluated. A natural hydrogen accumulation model was established, the target area for natural hydrogen accumulation C was delineated, and an integrated geological model of "source-channel-reservoir-caprock" was constructed. Furthermore, the process of conducting drilling operations based on natural hydrogen reservoir target areas to verify anomalies and obtain results on natural hydrogen resource potential includes: Well locations are determined based on geological models, and pre-drilling feasibility studies and well location designs are conducted. Drilling operations are then carried out to obtain core samples and soil gas samples. Based on core and soil gas samples, we conduct hydrogen content detection, reservoir properties and caprock sealing evaluation, verify geophysical and geochemical anomalies, comprehensively evaluate the potential of natural hydrogen resources and accumulation conditions, and achieve comprehensive and effective exploration of natural hydrogen resources.

[0050] Example 2 like Figure 2 As shown, based on the same inventive concept, this embodiment also provides a rapid and comprehensive survey system for natural hydrogen resources, including: The prospective area delineation module is used to delineate the prospective areas of natural hydrogen based on remote sensing interpretation and geochemical measurement results. The hydrogen source rock research module is used to delineate basic to ultrabasic rocks and ferromagnetic basements based on natural hydrogen prospective areas through airborne gravity and magnetic surveys and ground geological surveys, assess their hydrogen generation capacity, and obtain hydrogen source rock information. The migration channel research module is used to identify deep and shallow faults based on natural hydrogen prospective areas, by integrating airborne gravity and magnetic inversion, seismic interpretation, and high-precision remote sensing interpretation, clarify the spatiotemporal coupling relationship between the two, and obtain information on natural hydrogen migration channels. The reservoir research module is used to identify the lithology, physical properties and spatial distribution patterns of dominant reservoirs and obtain information on natural hydrogen reservoirs based on natural hydrogen prospective areas through geological surveys and seismic interpretation. The caprock research module is used to identify the three-dimensional spatial distribution and sealing capacity of dominant caprocks based on natural hydrogen prospective areas, using geological surveys, seismic interpretation, and time-frequency electromagnetic detection, and to obtain information on natural hydrogen caprocks. The target area selection module is used to delineate natural hydrogen accumulation target areas by integrating multiple information such as hydrogen source rock distribution information, migration channel information, reservoir information and caprock information. The drilling verification module is used to carry out drilling projects based on the target area, verify anomalies, and obtain results on the potential of natural hydrogen resources.

[0051] The natural hydrogen resource comprehensive survey system provided in this embodiment has all the advantages of the natural hydrogen resource comprehensive survey method provided in Embodiment 1.

[0052] Example 3 This embodiment also discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in Embodiment 1.

[0053] Example 4 This embodiment also discloses a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method described in Embodiment 1.

[0054] Example 5 This embodiment also discloses a computer program product, including a computer program that, when executed by a processor, implements the steps of the method described in Embodiment 1.

[0055] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for rapid comprehensive investigation of natural hydrogen resources, characterized in that, The method comprises the following steps: According to the remote sensing interpretation and geochemical measurement results, a natural hydrogen prospective area is delineated; According to the natural hydrogen prospective area, basic-ultrabasic rocks and ferromagnetic basement are delineated through airborne gravity and magnetic survey and ground geological survey, hydrogen generation capacity is evaluated, and hydrogen source rock information is obtained; According to the natural hydrogen prospective area, deep and large faults and shallow faults are identified through comprehensive analysis of airborne gravity and magnetic inversion, seismic interpretation and high-precision remote sensing interpretation, and natural hydrogen migration channel information is obtained; According to the natural hydrogen prospective area, through geological survey and seismic interpretation, the spatial distribution law of the advantage reservoir lithology and physical property is identified, and the natural hydrogen reservoir information is obtained; According to the natural hydrogen prospective area, the three-dimensional spatial distribution and sealing capacity of the advantage cap rock are identified by using geological survey, seismic interpretation and time-frequency electromagnetic detection, and the sealing capacity information of the natural hydrogen cap rock is obtained; According to the hydrogen source rock information, natural hydrogen migration channel information, natural hydrogen reservoir information and cap rock information, multi-information fusion is carried out, and a natural hydrogen reservoir target area is delineated; According to the natural hydrogen reservoir target area, drilling engineering is implemented, the anomaly is verified, and the natural hydrogen resource potential result is obtained.

2. The method of claim 1, wherein the process of delineating the natural hydrogen prospective area comprises: According to the remote sensing image, the distribution and characteristics of the girdle and shallow faults are identified, and the identification result is obtained; According to the identification result, soil gas collection and component determination are carried out, and shallow hydrogen concentration data are obtained; According to the coupling relationship of the girdle, shallow fault distribution and hydrogen concentration data, spatial statistical analysis is carried out, high concentration anomaly area is drawn, and natural hydrogen prospective area is delineated.

3. The method of claim 1, wherein the process of obtaining hydrogen source rock information comprises: According to the airborne gravity and magnetic data, the depth, size, occurrence information and distribution characteristics of basic-ultrabasic rocks and ferromagnetic basement are obtained through potential field conversion and anomaly separation; According to the depth, size, occurrence information and distribution characteristics of basic-ultrabasic rocks and ferromagnetic basement, ground route survey, profile survey and sampling are carried out, rock and gas samples are collected, isotope geochemical analysis and high temperature and high pressure experiment are carried out, hydrogen generation capacity is evaluated, and hydrogen source rock information is obtained.

4. The method of claim 1, wherein the process of obtaining natural hydrogen migration channel information comprises: According to the natural hydrogen prospective area, the occurrence, size and spatial distribution of the concealed deep and large faults are identified by using the results of airborne gravity and magnetic inversion and seismic profile interpretation; According to the remote sensing data, the occurrence, size and spatial distribution of the shallow faults are identified; According to the occurrence, size and spatial distribution of the concealed deep and large faults and the shallow faults, the correlation between the spatial position, evolution and geological event causes of the deep and large faults and the shallow faults is constructed through ground geological survey, the time-space coupling relationship is established, the natural hydrogen migration channel is identified, and the natural hydrogen migration channel information is obtained.

5. The method of claim 1, wherein the process of obtaining natural hydrogen reservoir information comprises: According to the natural hydrogen prospective area, ground geological survey is carried out, including sedimentary facies analysis and reservoir physical property measurement, combined with route survey and profile survey, reservoir lithology, physical property and spatial distribution information are obtained; ​ ​ ​ ​ According to the seismic profile data, the deposition filling sequence of the hydrogen-bearing layer system is reconstructed, and the zonation characteristics of the thick-layered clastic reservoir are identified; According to the difference in seismic wave reflection rate, the lithological interface is identified, and the deep lithological layering and occurrence are obtained; According to the reservoir lithology, physical property and spatial distribution information, as well as the deep lithological layering and occurrence, the distribution law of the dominant reservoir is clarified, and the information of the natural hydrogen reservoir is obtained.

6. The method of claim 1, wherein the process of obtaining the information of the natural hydrogen cap rock comprises: According to the natural hydrogen prospecting area, the porosity, water content, density, homogeneity and thickness parameters of the dense rock layer are collected through geological investigation, and the dominant cap rock is screened; According to the seismic profile interpretation, the lithological zonation characteristics of the dominant cap rock are identified, and the spatial distribution and sealing capacity are evaluated; According to the time-frequency electromagnetic data, the lateral distribution and burial depth information of the cap rock are obtained, and the cap rock physical property model is constructed, so as to obtain the three-dimensional distribution range of the dominant cap rock; According to the three-dimensional spatial distribution and sealing capacity of the dominant cap rock, the information of the natural hydrogen cap rock is obtained.

7. The method of claim 1, wherein the process of delineating the natural hydrogen reservoir target area comprises: According to the four reservoir-forming elements of the natural hydrogen prospecting area, hydrogen source rock information, migration pathway information, reservoir information and cap rock information, the element spatial coupling relationship is determined, the natural hydrogen reservoir target area is divided, and an integrated geological model of "source-path-reservoir-cap" is constructed.

8. The method of claim 1, wherein the process of drilling and verifying the anomaly and obtaining the natural hydrogen resource potential result according to the natural hydrogen target area comprises: According to the geological model, the well site deployment is optimized, drilling is implemented, and core and soil gas samples are obtained; Based on the core and soil gas samples, the hydrogen-bearing property detection, reservoir physical property and cap rock sealing property evaluation are carried out, the anomaly is verified, the resource potential is evaluated, and the natural hydrogen resource potential result is obtained. It comprises: A prospecting area delineation module is used to delineate the natural hydrogen prospecting area according to remote sensing interpretation and geochemical measurement results; A hydrogen source rock research module is used to delineate basic-ultrabasic rocks and ferromagnetic basement according to the natural hydrogen prospecting area through airborne gravity and magnetic and ground geological investigation, evaluate the hydrogen generation capacity, and obtain the hydrogen source rock distribution information; 9. A natural hydrogen resource rapid comprehensive investigation system, characterized in that, A migration pathway research module is used to identify deep faults and shallow faults according to the natural hydrogen prospecting area by comprehensively analyzing airborne gravity and magnetic inversion, seismic interpretation and high-precision remote sensing interpretation, and obtain the natural hydrogen migration pathway information; A reservoir research module is used to obtain the natural hydrogen reservoir information according to the natural hydrogen prospecting area through geological investigation and seismic interpretation; A cap rock research module is used to obtain the natural hydrogen cap rock information according to the natural hydrogen prospecting area by using geological investigation, seismic interpretation and time-frequency electromagnetic detection; A target area optimization module is used to delineate the natural hydrogen reservoir target area by fusing multiple information according to the hydrogen source rock information, migration pathway information, reservoir information and cap rock information; A drilling verification module is used to implement drilling engineering, verify the anomaly and obtain the natural hydrogen resource potential result according to the natural hydrogen reservoir target area. ​ ​ ​

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