Sulfur isotope on-line determination device and method

Abstract

The invention discloses an online determination device and method for sulfur isotope. The device comprises a fluid inclusion positioning module, a fluid inclusion component detection module and an isotope detection module, wherein the fluid inclusion positioning module is used for determining a position parameter of at least one candidate fluid inclusion in a target rock sample; the fluid inclusion component detection module is used for sequentially carrying out component detection on each candidate fluid inclusion according to the position parameter of each candidate fluid inclusion, and determining the candidate fluid inclusion containing the sulfur element as a target fluid inclusion; and the isotope detection module is used for collecting the fluid in the target fluid inclusion according to the position parameter of the target fluid inclusion, performing isotope detection on the fluid, and determining the sulfur isotope in the target fluid inclusion. According to the technical scheme, in-situ online analysis of the sulfur isotope of the fluid inclusion is realized, and the efficiency and the accuracy of online determination of the sulfur isotope are improved.

Description

Technical Field

[0001] The present application relates to the fields of oil and gas reservoir formation research and oil and gas geochemistry technology, and in particular to an online sulfur isotope determination device and method. Background Art

[0002] The exploration and development of deep oil and gas resources is a crucial component of deep Earth exploration. Currently, deep and ultra-deep layers have become the primary battlefield for major oil and gas discoveries in my country, and accelerating the exploration and development of these layers has become an inevitable choice for safeguarding national energy security. However, deep oil and gas exploration faces numerous challenges and challenges, including high reservoir temperatures, high pressures, complex geostresses, and strong inorganic-organic interactions, leading to significant risks.

[0003] At present, sulfur isotope testing of full-gas samples in gas reservoirs only yields the characteristics of sulfur isotopes under current reservoir conditions. This cannot reflect the evolution of gas reservoirs during the formation of natural gas or infer the origin of natural gas. It is also impossible to accurately identify the source of deep oil and natural gas exploration, nor is it easy to track the migration of oil and gas and favorable accumulation areas, limiting the realization of deep resource potential and the assessment of oil and gas exploration prospects.

[0004] Therefore, how to provide a technical solution that can quickly and accurately perform online determination of sulfur isotopes is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The present application provides an online sulfur isotope determination device and method. By detecting the sulfur element composition of fluid inclusions and then performing sulfur isotope determination, in-situ online fluid inclusion sulfur isotope analysis is achieved. The online sulfur isotope determination can be performed quickly and accurately, thereby improving the efficiency and accuracy of the online sulfur isotope determination.

[0006] According to one aspect of the present application, an online sulfur isotope determination device is provided, which includes a fluid inclusion positioning module, a fluid inclusion component detection module and an isotope detection module; wherein,

[0007] The fluid inclusion positioning module is used to determine the position parameters of at least one candidate fluid inclusion in the target rock sample;

[0008] The fluid inclusion component detection module is used to perform component detection on each candidate fluid inclusion in turn according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur as the target fluid inclusion;

[0009] The isotope detection module is used to collect the fluid in the target fluid inclusion according to the position parameters of the target fluid inclusion, and perform isotope detection on the fluid to determine the sulfur isotope in the target fluid inclusion.

[0010] According to another aspect of the present application, an online determination method for sulfur isotopes is provided, the method comprising: determining position parameters of at least one candidate fluid inclusion in a target rock sample based on a fluid inclusion positioning module;

[0011] Based on the fluid inclusion component detection module, the composition of each candidate fluid inclusion is detected in turn according to the position parameters of each candidate fluid inclusion, and the candidate fluid inclusion containing sulfur is determined as the target fluid inclusion;

[0012] Based on the isotope detection module, the fluid in the target fluid inclusion is collected according to the position parameters of the target fluid inclusion, and the isotope detection is performed on the fluid to determine the sulfur isotope in the target fluid inclusion.

[0013] The present application provides an online determination device and method for sulfur isotopes. The device includes a fluid inclusion positioning module, a fluid inclusion composition detection module, and an isotope detection module. The fluid inclusion positioning module is used to determine the position parameters of at least one candidate fluid inclusion in the target rock sample. The fluid inclusion composition detection module is used to perform composition detection on each candidate fluid inclusion in turn according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur as the target fluid inclusion. The isotope detection module is used to collect the fluid in the target fluid inclusion according to the position parameters of the target fluid inclusion, and perform isotope detection on the fluid to determine the sulfur isotope in the target fluid inclusion. This technical solution realizes in-situ online fluid inclusion sulfur isotope analysis by performing sulfur isotope determination after sulfur element composition detection on the fluid inclusion, thereby improving the efficiency and accuracy of online sulfur isotope determination.

[0014] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic structural diagram of an online sulfur isotope determination device provided in Example 1 of the present application;

[0017] Figure 2 A schematic diagram of a Raman spectrum provided in Example 1 of the present application;

[0018] Figure 3 A schematic structural diagram of an online sulfur isotope determination device provided in Example 2 of the present application;

[0019] Figure 4 A schematic structural diagram of another on-line sulfur isotope determination device provided in Example 2 of the present application;

[0020] Figure 5 A schematic structural diagram of another on-line sulfur isotope determination device provided in Example 2 of the present application;

[0021] Figure 6 This is a flow chart of an online sulfur isotope determination method provided in Example 3 of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0023] It should be noted that the terms "first", "second", "target", "candidate", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Example 1

[0025] Figure 1This is a schematic structural diagram of an online sulfur isotope determination device provided in Example 1 of the present application. This embodiment is applicable to the scenario of online determination of sulfur isotopes in fluid inclusions.

[0026] like Figure 1 As shown, the online sulfur isotope determination device provided in the embodiment of the present invention includes a fluid inclusion positioning module 110, a fluid inclusion component detection module 120 and an isotope detection module 130; wherein:

[0027] A fluid inclusion positioning module 110 is used to determine the position parameters of at least one candidate fluid inclusion in the target rock sample;

[0028] a fluid inclusion component detection module 120 for sequentially detecting the components of each candidate fluid inclusion based on the position parameters of each candidate fluid inclusion, and determining the candidate fluid inclusion containing sulfur as the target fluid inclusion;

[0029] The isotope detection module 130 is used to collect the fluid in the target fluid inclusion according to the position parameters of the target fluid inclusion, and perform isotope detection on the fluid to determine the sulfur isotope in the target fluid inclusion.

[0030] Fluid inclusions are mineral-forming media trapped in minerals by crystal defects during their growth process and remaining enclosed within them. They are samples of the rock-forming and ore-forming fluids or melts. By analyzing the sulfur isotopes of fluid inclusions in target rock samples, we can determine the genesis and origin of the natural gas reservoirs in which they reside.

[0031] Specifically, the target rock sample can be processed to produce a rock thin section, which can be observed using an instrument with a magnifying function such as an optical microscope to determine the observed candidate fluid inclusions and the position parameters of the candidate fluid inclusions. Alternatively, an image of the rock thin section after magnification can be collected, and the collected image can be input into a pre-trained fluid inclusion screening model to determine at least one candidate fluid inclusion in the target rock sample and its position parameters.

[0032] Optionally, the fluid inclusion positioning module 110 includes a closed sample stage, a vacuum pump and an image acquisition device; wherein the closed sample stage is used to fix the target rock sample; the vacuum pump is used to vacuum the closed sample stage; and the image acquisition device is used to acquire an image of the target rock sample, obtain a target image, and determine at least one candidate fluid inclusion in the target rock sample.

[0033] In an embodiment of the present invention, first, a rock slice made from a target rock sample can be placed in a preset position in a closed sample stage and fixed by a clamp in the closed sample stage; second, a lens of an image acquisition device such as a microscope is inserted from above the closed sample stage, and the closed sample stage is placed on an automatic platform; third, the closed sample stage is evacuated by a vacuum pump connected to the closed sample stage; finally, a target image of the rock slice is obtained by inserting the lens of the image acquisition device into the closed sample stage, and candidate fluid inclusions present in the rock slice are determined based on the target image and their position parameters are recorded.

[0034] After locating the candidate fluid inclusions in the target rock sample, the sulfur element in each candidate fluid inclusion can be detected to conduct a preliminary screening of the candidate fluid inclusions, and the candidate fluid inclusions containing sulfur elements can be identified as target fluid inclusions to improve the efficiency of sulfur isotope determination in fluid inclusions.

[0035] Specifically, the composition of sulfur in candidate fluid inclusions can be detected by electron probe microanalysis, neutron induced X-ray emission analysis, synchrotron X-ray fluorescence analysis, micro-infrared spectroscopy analysis, ultraviolet fluorescence microanalysis, Raman spectroscopy analysis, etc.

[0036] Optionally, the fluid inclusion component detection module is a laser Raman spectrometer; the microscopic laser Raman spectrometer is specifically used to perform component detection on each candidate fluid inclusion in turn according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur element as the target fluid inclusion based on the correspondence between Raman shift and signal intensity in the detection results.

[0037] Among them, the laser Raman spectrometer can control the excitation light to irradiate the candidate fluid inclusions in sequence according to the position parameters of each candidate fluid inclusion. Most of the photons will elastically collide with the molecules in the candidate fluid inclusions and scatter at the same frequency. -10 to 10 -6 The photons undergo inelastic collisions with molecules in the candidate fluid inclusion, changing their frequency. Furthermore, a Raman spectrum can be generated based on the Raman scattering signal intensity and Raman shift. The Raman shift corresponding to the signal intensity peak in the spectrum can be analyzed to determine whether the candidate fluid inclusion contains sulfur.

[0038] For example, Figure 2 A schematic diagram of a Raman spectrum provided in Example 1 of this application. Figure 2As shown in FIG, in the Raman spectrum of a candidate fluid inclusion, peaks can be observed at Raman shifts of 149.75, 218.22, and 472.5, respectively. Therefore, it can be determined that the candidate fluid inclusion contains sulfur.

[0039] After determining the target fluid inclusions containing sulfur, the sulfur isotopes in the target fluid inclusions can be measured.

[0040] Sulfur exists naturally in four stable isotopes: 32S, 33S, 34S, and 36S, with relative abundances of 95.02%, 0.75%, 4.21%, and 0.02%, respectively. Due to chemical and biological factors, the distribution of sulfur isotopes varies across different materials on Earth. The sulfur isotope composition is typically expressed as the deviation of a sample's 34S / 32S ratio from the international standard (CDT) 34S / 32S ratio in parts per thousand.

[0041] Specifically, the sulfur isotopes in the target fluid inclusions can be measured using a mass spectrometer, an isotope ratio mass spectrometer, a nuclear magnetic resonance spectroscopy (NMR), a radiometer, or the like. In an embodiment of the present invention, the target fluid inclusion can be placed in a plasma ionization coupled mass spectrometer, and the laser spot size can be controlled from small to large to gradually open the target fluid inclusion, obtain the fluid within the target fluid inclusion, and determine the sulfur isotope signal in the target fluid inclusion.

[0042] An embodiment of the present invention provides an online sulfur isotope determination device, which includes a fluid inclusion positioning module, a fluid inclusion composition detection module, and an isotope detection module; wherein the fluid inclusion positioning module is used to determine the position parameters of at least one candidate fluid inclusion in the target rock sample; the fluid inclusion composition detection module is used to perform composition detection on each candidate fluid inclusion in turn based on the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur as the target fluid inclusion; the isotope detection module is used to collect the fluid in the target fluid inclusion based on the position parameters of the target fluid inclusion, and perform isotope detection on the fluid to determine the sulfur isotope in the target fluid inclusion. This technical solution realizes in-situ online fluid inclusion sulfur isotope analysis by performing sulfur isotope determination after sulfur component detection on the fluid inclusion, thereby improving the efficiency and accuracy of online sulfur isotope determination.

[0043] Example 2

[0044] Figure 3 This is a schematic diagram of the structure of an online sulfur isotope determination device provided in Example 2 of this application. Figure 3As shown, the device includes a fluid inclusion positioning module 210, a fluid inclusion component detection module 220 and an isotope detection module; the isotope detection module includes a sampling unit 230 and an isotope determination unit 240; wherein:

[0045] The fluid inclusion positioning module 210 is used to determine the position parameters of at least one candidate fluid inclusion in the target rock sample;

[0046] The fluid inclusion component detection module 220 is configured to perform component detection on each candidate fluid inclusion in turn according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur as the target fluid inclusion;

[0047] The sampling unit 230 is used to control sampling to sample the fluid in the target fluid inclusion according to the position parameters of the target fluid inclusion to obtain a target sample;

[0048] The isotope determination unit 240 is used to perform isotope detection on the target sample according to the composition of the target sample to determine the sulfur isotope in the target fluid inclusion.

[0049] The on-line sulfur isotope determination device provided in the embodiment of the present invention first samples the fluid in the target fluid inclusion through a sampling unit, and then sends the sample to the isotope determination unit for sulfur isotope determination, thereby improving the efficiency and accuracy of on-line sulfur isotope determination.

[0050] For example, Figure 4 This is a schematic diagram of the structure of another online sulfur isotope determination device provided in Example 2 of the present application, wherein 11 is a closed sample stage, 12 is a sample holder, 13 is a switch valve, 14 is a vacuum pump, 15 is a microscope, 16 is a laser Raman spectrometer, 17 is an ionization mass spectrometer, and 18 is a sampler. Figure 4 The process of sulfur isotope determination using the online sulfur isotope determination device shown is as follows:

[0051] In the first step, the rock slice is loaded into a preset position in the closed sample stage 11 and fixed with a sample holder 12;

[0052] The second step is to open the switch valve 13 and use the vacuum pump 14 to evacuate the closed sample stage 11;

[0053] The third step is to observe the rock slice in the closed sample stage 11 using a microscope 15 to locate the candidate fluid inclusions and record the position parameters of each candidate fluid inclusion.

[0054] Step 4: Based on the position parameters of each candidate fluid inclusion, the laser Raman spectrometer 16 is used to detect each candidate fluid inclusion in turn, and the candidate fluid inclusion containing sulfur is determined as the target fluid inclusion;

[0055] Step 5: Based on the position parameters of the target fluid inclusion, a negative pressure sampler 18 is used to penetrate the target fluid inclusion to sample the fluid in the target fluid inclusion to obtain a target sample.

[0056] In the sixth step, the target sample is sent to the ionization mass spectrometer 17 to perform isotope determination on the target sample to determine the sulfur isotope in the target fluid inclusion.

[0057] Based on the above embodiment, optionally, the isotope determination unit includes a first sample chamber, a hydrogen chamber, a second sample chamber, a carrier gas chamber and an isotope detector; wherein, if the component of the target sample is hydrogen sulfide, the first sample chamber is used to store the target sample; if the component of the target sample is elemental sulfur, the hydrogen chamber is used to store hydrogen and control the injection of hydrogen into the second sample chamber; the second sample chamber is used to store the target sample to react with the hydrogen to generate the target sample in the form of hydrogen sulfide; the carrier gas chamber is used to store carrier gas and control the carrier gas to blow the target sample into the isotope detector; the isotope detector is used to perform isotope detection on the target sample and determine the sulfur isotope in the target fluid inclusion.

[0058] For example, Figure 5 This is a schematic diagram of the structure of another on-line sulfur isotope determination device provided in Example 2 of this application. Figure 5 As shown, 21 is a closed sample stage, 22 is a sample holder, 23 is a switch valve, 24 is a vacuum pump, 25 is a microscope, 26 is a laser Raman spectrometer, 31 is a sampler, 32 is a first sample chamber, 33 is a second sample chamber, 34 is a temperature control device, 35 is a hydrogen chamber, 36 is an isotope detector, and 37 is a carrier gas chamber. Figure 5 The process of sulfur isotope determination using the online sulfur isotope determination device shown is as follows:

[0059] In the first step, the rock slice is loaded into a preset position in the closed sample stage 21 and fixed with a sample holder 22;

[0060] In the second step, the switch valve 23 is opened and the closed sample stage 21 is evacuated by the vacuum pump 24;

[0061] The third step is to observe the rock slice in the closed sample stage 21 using a microscope 25 to locate the candidate fluid inclusions and record the position parameters of each candidate fluid inclusion.

[0062] The fourth step is to detect each candidate fluid inclusion in turn using a laser Raman spectrometer 26 according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur as the target fluid inclusion;

[0063] Step 5: Based on the position parameters of the target fluid inclusion, a negative pressure sampler 31 is used to penetrate the target fluid inclusion to sample the fluid in the target fluid inclusion to obtain a target sample.

[0064] Step 6: Determine whether the target fluid inclusion is hydrogen sulfide or elemental sulfur based on the composition detection results of each candidate fluid inclusion by the laser Raman spectrometer 26;

[0065] If the target sample is composed of hydrogen sulfide, the target sample is stored in the first sample chamber 32. The valve connected to the carrier gas chamber 37 is opened to allow the carrier gas to blow the target sample into the isotope detector 36. The isotope detector 36 detects the target sample to determine the sulfur isotope in the target fluid inclusion.

[0066] If the target sample is composed of elemental sulfur, the target sample is stored in the second sample chamber 33; and the valve connected to the hydrogen chamber 35 is opened to allow hydrogen to be injected into the second sample chamber; the temperature control device 34 is controlled to heat the second sample chamber 33 to a preset temperature, so that the hydrogen and elemental sulfur in the second sample chamber 33 undergo a chemical reaction to generate the target sample in the form of hydrogen sulfide; the valve connected to the carrier gas chamber 37 is opened to allow the carrier gas to blow the target sample into the isotope detector 36; the isotope detector 36 detects the target sample to determine the sulfur isotope in the target fluid inclusion.

[0067] Example 3

[0068] Figure 6 This is a flow chart of an online determination method of sulfur isotopes provided in Example 3 of this application. This example is optimized based on the above example. Figure 6 As shown, the method of this embodiment specifically includes the following steps:

[0069] S310, determining the position parameters of at least one candidate fluid inclusion in the target rock sample based on the fluid inclusion positioning module;

[0070] S320: Based on the fluid inclusion component detection module, the composition of each candidate fluid inclusion is detected in sequence according to the position parameters of each candidate fluid inclusion, and the candidate fluid inclusion containing sulfur is determined as the target fluid inclusion;

[0071] S330. Based on the isotope detection module, according to the position parameters of the target fluid inclusion, the fluid in the target fluid inclusion is collected, and the isotope detection is performed on the fluid to determine the sulfur isotope in the target fluid inclusion.

[0072] An embodiment of the present invention provides an online sulfur isotope determination method. The method, based on a fluid inclusion positioning module, determines the position parameters of at least one candidate fluid inclusion in a target rock sample. Based on the position parameters of each candidate fluid inclusion, a fluid inclusion composition detection module sequentially performs composition detection on each candidate fluid inclusion, and determines the candidate fluid inclusion containing sulfur as the target fluid inclusion. Based on the isotope detection module, the fluid in the target fluid inclusion is collected based on the position parameters of the target fluid inclusion, and isotope detection is performed on the fluid to determine the sulfur isotope in the target fluid inclusion. This technical solution realizes in-situ online fluid inclusion sulfur isotope analysis by performing sulfur isotope determination after sulfur composition detection on the fluid inclusion, thereby improving the efficiency and accuracy of online sulfur isotope determination.

[0073] Based on the above embodiment, optionally, isotope detection is performed on the target fluid inclusion according to the position parameters of the target fluid inclusion to determine the sulfur isotope in the target fluid inclusion. The method includes:

[0074] Based on the sampling unit, according to the position parameters of the target fluid inclusion, the sampling is controlled to sample the fluid in the target fluid inclusion to obtain a target sample;

[0075] Based on the isotope determination unit, the target sample is subjected to isotope detection according to the composition of the target sample to determine the sulfur isotope in the target fluid inclusion.

[0076] Optionally, performing isotope detection on the target sample according to the composition of the target sample to determine the sulfur isotope in the target fluid inclusion includes:

[0077] If the target sample is composed of hydrogen sulfide, the target sample is blown into an isotope detector by controlling the carrier gas through a carrier gas chamber, and the isotope detector is used to perform isotope detection on the target sample to determine the sulfur isotope in the target fluid inclusion;

[0078] If the target sample is composed of elemental sulfur, hydrogen is controlled to react with the target sample to generate hydrogen sulfide, and the carrier gas is controlled to blow the target sample into an isotope detector. The isotope detector is used to perform isotope detection on the target sample to determine the sulfur isotope in the target fluid inclusion.

[0079] Optionally, determining position parameters of at least one candidate fluid inclusion in the target rock sample includes:

[0080] Controlling the target rock sample to be fixed on a closed sample stage, and performing a vacuum treatment on the closed sample stage by using a vacuum pump;

[0081] controlling an image acquisition device in the closed sample stage to acquire an image of the target rock sample to obtain a target image;

[0082] determining at least one candidate fluid inclusion in the target rock sample based on the target image;

[0083] The position parameters of each candidate fluid inclusion in the target rock sample are determined according to the preset coordinate system of each candidate fluid inclusion and the closed sample stage.

[0084] Optionally, after performing isotope detection on the target fluid inclusion according to the position parameters of the target fluid inclusion to determine the sulfur isotope in the target fluid inclusion, the method further includes:

[0085] The sulfur isotope ratio in the target fluid inclusion is compared with the sulfur isotope ratio in the natural gas produced from the oil and gas reservoir to which the target rock sample belongs, so as to determine the oil and gas source of the target rock sample.

[0086] An online sulfur isotope determination method provided in an embodiment of the present application can be applied to an online sulfur isotope determination device provided in any embodiment of the present application, and has corresponding functional modules and beneficial effects of the execution device. For technical details not described in detail in the above embodiments, please refer to those provided in any embodiment of the present application.

[0087] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This is not limited herein.

[0088] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. An on-line determination device for sulfur isotopes, characterized in that: The device comprises a fluid inclusion positioning module, a fluid inclusion component detection module and an isotope detection module; wherein, The fluid inclusion positioning module is used to determine the position parameters of at least one candidate fluid inclusion in the target rock sample; The fluid inclusion component detection module is used to detect the components of each candidate fluid inclusion in turn according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur as the target fluid inclusion; The isotope detection module is used to collect the fluid in the target fluid inclusion according to the position parameters of the target fluid inclusion, and perform isotope detection on the fluid to determine the sulfur isotope in the target fluid inclusion.

2. The device according to claim 1, characterized in that The isotope detection module includes a sampling unit and an isotope determination unit; wherein, The sampling unit is used to control sampling according to the position parameters of the target fluid inclusion to sample the fluid in the target fluid inclusion to obtain a target sample; The isotope determination unit is used to perform isotope detection on the target sample according to the composition of the target sample, and determine the sulfur isotope in the target fluid inclusion.

3. The device according to claim 2, characterized in that The isotope determination unit includes a first sample chamber, a hydrogen chamber, a second sample chamber, a carrier gas chamber and an isotope detector; wherein, If the component of the target sample is hydrogen sulfide, the first sample chamber is used to store the target sample; If the target sample is composed of elemental sulfur, the hydrogen chamber is used to store hydrogen and control the hydrogen to be injected into the second sample chamber; The second sample chamber is used to store the target sample to react with the hydrogen to generate the target sample in the form of hydrogen sulfide; The carrier gas chamber is used to store the carrier gas and control the carrier gas to blow the target sample into the isotope detector; The isotope detector is used to perform isotope detection on the target sample to determine the sulfur isotope in the target fluid inclusion.

4. The device according to claim 1, characterized in that The fluid inclusion positioning module includes a closed sample stage, a vacuum pump and an image acquisition device; wherein, The closed sample stage is used to fix the target rock sample; The vacuum pump is used to evacuate the closed sample stage; The image acquisition device is used to acquire the image of the target rock sample, obtain the target image, and determine at least one candidate fluid inclusion in the target rock sample.

5. The device according to claim 1, characterized in that The fluid inclusion component detection module is a laser Raman spectrometer; The laser Raman spectrometer is specifically used to detect the components of each candidate fluid inclusion in turn according to the position parameters of each candidate fluid inclusion, and determine the candidate fluid inclusion containing sulfur element as the target fluid inclusion according to the corresponding relationship between Raman shift and signal intensity in the detection results.

6. A method for online determination of sulfur isotopes, characterized in that: The method comprises: Determine the position parameters of at least one candidate fluid inclusion in the target rock sample based on the fluid inclusion positioning module; Based on the fluid inclusion component detection module, according to the position parameters of each candidate fluid inclusion, the component of each candidate fluid inclusion is detected in turn, and the candidate fluid inclusion containing sulfur is determined as the target fluid inclusion; Based on the isotope detection module, the fluid in the target fluid inclusion is collected according to the position parameters of the target fluid inclusion, and the isotope detection is performed on the fluid to determine the sulfur isotope in the target fluid inclusion.

7. The method according to claim 6, characterized in that According to the position parameters of the target fluid inclusion, the fluid in the target fluid inclusion is collected, and the isotope detection is performed on the fluid to determine the sulfur isotope in the target fluid inclusion. The method comprises: Based on the sampling unit, according to the position parameters of the target fluid inclusion, the sampling is controlled to sample the fluid in the target fluid inclusion to obtain a target sample; Based on the isotope determination unit, the target sample is subjected to isotope detection according to the composition of the target sample to determine the sulfur isotope in the target fluid inclusion.

8. The method according to claim 7, characterized in that According to the composition of the target sample, isotope detection is performed on the target sample to determine the sulfur isotope in the target fluid inclusion, including: If the component of the target sample is hydrogen sulfide, the carrier gas is controlled by a carrier gas cabin to blow the target sample into an isotope detector, and the isotope detector is used to perform isotope detection on the target sample to determine the sulfur isotope in the target fluid inclusion; If the target sample is composed of elemental sulfur, hydrogen is controlled to react with the target sample to generate hydrogen sulfide, and a carrier gas is controlled to blow the target sample into an isotope detector. The isotope detector is used to perform isotope detection on the target sample to determine the sulfur isotope in the target fluid inclusion.

9. The method according to claim 6, characterized in that Determining the location parameters of at least one candidate fluid inclusion in the target rock sample, including: Controlling the target rock sample to be fixed on a closed sample table, and performing a vacuum treatment on the closed sample table by a vacuum pump; Controlling the image acquisition device in the closed sample stage to acquire the image of the target rock sample to obtain a target image; determining at least one candidate fluid inclusion in the target rock sample according to the target image; The position parameters of each candidate fluid inclusion in the target rock sample are determined according to the preset coordinate system of each candidate fluid inclusion and the closed sample stage.

10. The method according to claim 6, characterized in that After performing isotope detection on the target fluid inclusion according to the position parameters of the target fluid inclusion to determine the sulfur isotope in the target fluid inclusion, the method further comprises: The sulfur isotope ratio in the target fluid inclusion is compared with the sulfur isotope ratio in the natural gas produced from the oil and gas reservoir to which the target rock sample belongs, so as to determine the oil and gas source of the target rock sample.

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