CN115453085B - Method for quantitatively analyzing coupling mechanism between ultra-deep evaporite and microbial dolomite - Google Patents
Method for quantitatively analyzing coupling mechanism between ultra-deep evaporite and microbial dolomite Download PDFInfo
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Abstract
The invention discloses a method for quantitatively analyzing a coupling mechanism between ultra-deep evaporite and microbial dolomite, which comprises the following steps: (1) collecting a sample; (2) Determining the content of normal and trace elements and the content of each mineral in the sample, and simultaneously determining C, O, sr and carbonate lattice S isotopes in the sample; (3) judging a deposition phase and a deposition environment; (4) Tracing the source of the microorganism dolomite carbon and strontium, the properties and the source of the diagenetic fluid; the influence of the tracer diagenetic fluid on the microbial dolomite; (5) Measuring the uniform temperature, salinity, gas phase and liquid phase components of the dolomite fluid inclusions; (6) And comprehensively analyzing the deposition environments of the evaporite and the microbial dolomite, and finally recovering the ancient deposition environments and the coupling configuration relation. The invention can effectively improve the judging work efficiency and reliability of the cause relation between the evaporite and the microbial dolomite, thereby providing necessary geological basis and theoretical basis for the research of the formation mechanism of the microbial dolomite.
Description
Technical Field
The invention relates to the technical field of geological exploration, in particular to a method for quantitatively analyzing a coupling mechanism between ultra-deep evaporite and microbial dolomite.
Background
In carbonate formations, high quality hydrocarbon reservoirs often undergo dolomite formation, and the hydrocarbon is mostly enriched in carbonate reservoirs. According to the existing research, a symbiotic system formed by dolomite development and evaporite exists in a Sichuan basin deep-ultra-deep carbonate stratum, and the evaporite exists on or under the symbiotic system, so that the phenomenon shows that the development of the dolomite and the deposition of paste salt have a certain coupling relation.
At present, most of traditional technical means are to analyze a cream salt rock layer as a capping condition of an oil and gas reservoir, and meanwhile, the cream salt rock layer participates in TSR reaction to generate hydrogen sulfide, so that the reservoir physical property of the reservoir can be improved. However, this approach does not allow an in-depth study of this close relationship between the gypsum salt and the dolomite reservoir, and because of the extremely strong heterogeneity of the gypsum salt and the dolomite, the dolomite in this system is not clearly responsible, and the early low temperature dolomite has an unclear contribution to reservoir development, and thus is difficult to quantitatively analyze.
Based on the above, the inventor designs a method for quantitatively analyzing the coupling mechanism of the ultra-deep layer gypsum salt rock and the dolomite (Chinese patent publication No. CN111983189A, hereinafter referred to as "prior art 1"), which determines the source of the dolomite fluid of the layer system through research of judging the source, the seepage direction, the path and the like of the dolomite fluid, and provides good guarantee for quantitatively analyzing the coupling mechanism of the ultra-deep layer gypsum salt rock and the dolomite. However, further practice shows that although the formation relationship between the paste salt and dolomite is quantified to some extent in the prior art 1, the formation conditions of the dolomite and the formation background are not clarified. Research on dolomite causes has been carried out for over 200 years, and the scholars have generally divided the problem of dolomite causes into two points of cause of interchange and deposition of protogenesis (Huntingting et al, 2019), whereas researchers under near-surface conditions (temperature 20-30 ℃ C., pressure 1 atm) have carried out protogenesis experiments for 32 years under normal temperature conditions due to Land professor et al, but have not succeeded (Land, 1985, 1998), thus contributing to the prevalence of dolomite interchange theory, and proposed various dolomite cause modes (Zentmyer et al, 2011, stefanet al, 2003). And modern dolomite is extremely low in quantity relative to ancient dolomite, and contradictions are formed between the modern dolomite and the deposition of a large amount of dolomite in the early-barren, ancient and middle-aged seas (Land, 1998), so that the ancient method which is commonly used by us is almost difficult to implement in researching the cause of the dolomite. This creates a puzzle in dolomite, known in the literature as the "dolomite problem" (Heinrich and Heide, 2010). Therefore, dolomite is mostly considered to be the only cause of the cross-over. The generation cause is mainly to exchange limestone into dolomite in a dolomite petrochemical mode; primary deposition is followed by spontaneous precipitation of the water body in supersaturated state according to classical nucleation growth mechanisms (zentomier et al 2011).
The formation of the raw dolomite is a process limited by dynamics, the condition is more severe, and on one hand, a fluid with higher Mg/Ca ratio is needed; on the other hand, there is a need to overcome the kinetic barrier of magnesium ion hydrates, i.e. water and effects will prevent magnesium ions from entering the dolomite structure. However, in recent years, in laboratory conditions, proto-dolomite can also be formed under microbial induction, which is mainly formed in the evaporating environment. Studies show that laboratory researches and cultivation prove that species such as the rock-philic archaea inducing the precipitation of the protogenic dolomite are greatly propagated in an evaporation environment, and the evaporated rock is also greatly formed at the moment, but the formation mechanism and the interaction relationship between the species are not clear.
The prior art 1 only conducted research on the relationship between the evaporite mineral and the dolomite (the cause of the cross-over) from a single species of the evaporite, and does not involve the research on the relationship between the evaporite and the microbial dolomite (the cause of the cross-over), while the prior art 1 conducted many kinds of the evaporite, including minerals such as halides (stone salts, potassium salts, carnallite, etc.), sulfates (gypsum, anhydrite, mirabilite, polyhalite, etc.), nitrates (saltpeter, etc.), carbonates (soda, trona, dolomite, etc.), and borates (borax, etc.
Therefore, the problem of unclear knowledge of the necessity or contingency of the symbiotic relationship between the microbial dolomite and the chipforming limestone reservoir and the gypsum salt rock exists at present, the phenomenon of lack of the dolomite reservoir in the existing microbial dolomite-evaporite combination is difficult to explain, and the knowledge of the type of the reservoir cover combination still needs to be further improved. Therefore, new means are needed to be adopted for systematic and quantitative analysis aiming at the microbial dolomite and evaporite symbiotic system, so that better geological basis and theoretical basis are provided for oil and gas exploration.
Disclosure of Invention
The invention aims to provide a method for quantitatively analyzing a coupling mechanism between ultra-deep evaporite and microbial dolomite, which can be used for systematically and quantitatively analyzing a microbial dolomite and evaporite symbiotic system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method for quantitatively analyzing a coupling mechanism between ultra-deep evaporite and microbial dolomite, comprising the steps of:
(1) Taking a Sichuan basin ultra-deep carbonate stratum as a research object, determining the distribution rule of the petrophysical characteristics of various dolomite according to rock cores, rock fragments, logging and geophysical data, and collecting samples according to the distribution rule;
(2) Determining the contents of normal and trace elements and the content of each mineral in the sample, and simultaneously determining C, O, sr isotopes and carbonate lattice S isotopes in the sample;
(3) Respectively judging a deposition phase and a deposition environment according to the measurement result of the step (2);
(4) Tracing the source of the microorganism dolomite carbon and strontium and the property and source of the diagenetic fluid according to the determination result of the C, O, sr isotope in the step (2), and judging the difference between the microorganism dolomite carbon and strontium and the contemporaneous seawater; and according to the determination result of the carbonate lattice S isotope, tracing the influence of the diagenetic fluid on the microbial dolomite;
(5) Measuring the uniform temperature, salinity, gas phase and liquid phase components of the dolomite fluid inclusions;
(6) And (3) comprehensively analyzing the sedimentary environments of the evaporite and the microbial dolomite according to the achievement environments and the measurement results of the steps (3) to (5), and finally recovering the ancient achievement environments and the coupling configuration relation.
Specifically, in the step (2), the trace elements in the sample include B, ga, ca, ba, sr, fe, mn.
Further, in the step (1), the content of normal trace elements and trace elements in the sample is measured by a mixed acid digestion method; the mineral content in the samples was determined by full rock X-ray diffraction experiments.
Specifically, in the step (3), the deposition phase is judged to be a sea phase or a non-sea phase according to the element ratio of B/Ga, sr/Ba, sr/Ca and Th/U, fe/Mn.
Still further, in the step (3), the ancient salinity of the carbonate rock is calculated, and compared with the current normal seawater value, and the current sediment environment is deduced to be a salty or non-salty water environment.
Specifically, in the step (2), the biogenic carbonate is analyzed by the MC-ICP-MS solution method, and the S isotope of the carbonate lattice in the sample is determined.
Specifically, in the step (5), a cold-hot bench system is used to measure the uniform temperature and salinity of the dolomite fluid inclusions.
Specifically, in the step (5), a cold and hot stage system is combined with a laser confocal microscopic raman spectrometer to perform laser raman analysis of the fluid inclusion, so as to determine the gas phase and liquid phase components of the fluid inclusion in dolomite.
The design idea of the invention is as follows:
1. multi-scale texture feature fine study and deposition microphase analysis
Taking modern microbial mat sedimentology as theoretical guidance, comprehensively analyzing and classifying structural factors from the aspects of microbial mat growth and mineralization, and determining the respective developmental deposition environment and relative sea level change by taking the relationship between the development characteristics of a paste salt layer system under a carbonate-paste salt symbiotic system and the development of giant, large, medium and micro four-scale structures developed in microbial carbonate. Giant organization mainly refers to the overall exposure thickness, scale morphology and contact relation with other rocks of microbial carbonate rock in the field, lateral variation and vertical rhythmicity; large textures, on the scale of tens of centimeters to meters, mainly the external morphology of each individual structure of microbial carbonates, such as mat, pillar, dome, etc.; the medium-sized texture is mainly the fine dissection of the internal structure of the large-sized texture, and a causal classification system such as a lamellar structure, a clot structure, a dendritic structure and the like is established on the basis of the medium-sized texture; the micro-organization is mainly the microscopic recognition and microstructure of mineralized microbial fossils. Through the fine study of the multi-scale organization, the classification of the microbial carbonate rock is determined, the deposition microphase characteristics and the change of the relative sea level are changed, and the deposition phase and microphase evolution mode is established.
2. Ancient seawater property analysis
Under the framework of multi-scale constitution-cause, taking microbial rock geochemistry (C, O, sr, S isotope and normal and trace elements) as a reference background, extracting geochemistry information of microbial carbonate rock by utilizing a micro-area sampling method, discussing geochemistry information of different constitutions and salinity change, oxidation-reduction states of original seawater on the basis of representative evaluation of the original seawater, establishing a geochemistry comprehensive change curve, and providing an ancient seawater property background for microbial rock development characteristic analysis.
3. Microbial dolomite formation features in a typical texture
The development characteristics of dolomite and the formation experimental simulation of microbial dolomite in the mineralization process of the modern microbial mat are taken as theoretical guidance, under the framework of multi-scale organization-formation factor, the miniature organization of the typical medium-sized organization characteristics is selected for screening and analyzing the mineralization marks formed by the comprehensive microbial dolomite, the geochemical parameters of various marks are extracted, and the analog analysis of the formation experimental mineralization products of the modern microbial mat deposition and mineralization and the microbial dolomite is carried out. Microbial fossils markers, mainly comprising the morphology (microscopic external morphology and three-dimensional morphology reconstitution), preservation status, micro-nano-scale structure, mineral features (mineral phase, crystal morphology, crystallinity) and structure of mineralized residual EPS of microbial fossils individual and aggregates and mineralized Extracellular Polymers (EPS); the microbial dolomite mineralogy mark comprises indexes such as microbial causative minerals and non-microbial causative dolomite minerals, the distribution, the size, the morphology (microcosmic external morphology and three-dimensional morphology reconstruction), the crystal structure (crystal order degree, unit cell parameters, crystal face stripes, crystal face intervals, crystal lattice defects, inclusion characteristics) and the like of microbial causative dolomite minerals and the distribution, the size, the morphology (microcosmic external morphology and three-dimensional morphology reconstruction) of aggregates, and the dependency relationship between microbial fossils and EPS; fine microscopic geochemical markers, chemical composition (inorganic and organic) composition and structural distribution characteristics of the micronized fossils, microbial dolomite minerals and EPS mineralization products.
4. Microorganism mineralization forming dolomite action characteristic and causative mechanism comprehensive analysis
The method is characterized by comprehensively analyzing the contents of multiscale organization characteristics and evolution, sedimentary phases and sedimentary environments, ancient seawater properties, dolomite formation by microbial mineralization and the like by referring to the research concept of the process of forming dolomite by microbial mineralization in a modern microbial mat, inverting the coupling relation between the development characteristics of microbial rocks caused by the combined action of different external environments and microbial community activities under a carbonate-paste salt symbiotic system and the associated process of forming dolomite by microbial mineralization, and finally clarifying the geochemical response process of different microbial community activities and the causative mechanism of forming dolomite by microbial mineralization.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for coupling mechanism between ultra-deep evaporite and microbial dolomite, which is characterized in that a research concept of a process of forming dolomite by microbial mineralization in a modern microbial mat and a research concept of a modern microbial mineralization simulation experiment are used for constructing petrology marks, microbial fossil marks, microbial dolomite mineralogy marks, mineralization residual marks and geochemistry marks in different building frames by using a multi-disciplinary combination research method, and the coupling relationship between microbial dolomite and evaporite can be quantified by inverting microbial geochemical response and microbial dolomite mineralization process caused by combined action of the external environment and microbial community metabolism activities in combination with the contents of sedimentary facies, sedimentary environment, ancient ocean information and the like.
The scheme of the invention can effectively and reasonably screen the necessary petrology and geochemistry analysis work to be carried out preferentially, improves the judging work efficiency and reliability of the cause relation between the evaporite and the microbial dolomite, further provides necessary geological basis and theoretical basis for the research of the formation mechanism of the microbial dolomite, and provides meaningful guidance for oil and gas exploration and prediction.
The method has the advantages of simple flow, high accuracy and strong scheme feasibility, and is very suitable for large-scale popularization and application in the aspect of stratum reservoir prediction.
Detailed Description
The invention is further illustrated below with reference to examples, examples of which are included in the practice of the invention but are not limited thereto.
Examples
The embodiment provides a method for quantitatively analyzing a coupling mechanism between ultra-deep evaporite and microbial dolomite, which takes a Sichuan basin ultra-deep carbonate rock stratum as a research object and quantitatively analyzes the coupling mechanism between the ultra-deep evaporite and the microbial dolomite.
The main flow of the present embodiment will be described below.
1. Sample collection
Taking the river-the eastern Feixian group of the He Jiang-Liang Ping sea tank in the northeast area of Sichuan basin as an example, the early three times of the He Chuan basin is developed into a carbonate evaporation bench in the northeast area of Sichuan basin, and the carbonate evaporation bench is a set of evaporation tidal range deposition layers of sulfate-containing dolomite. According to the core, the rock scraps, the logging and the geophysical data, selecting a representative well core sampling research of the three-stack-system Feixian group in northeast of China, and taking an eagle rock block eagle 1 well as an important research well.
The key research section adopts detailed observation, recording and sampling methods, the type of the developed rock is judged in the observation process, and the external forms, internal structures and the like of the developed microbial carbonate rock giant organization and the large organization in different giant organizations are observed, numbered, described and field photographs are obtained in detail. The field samples are mainly collected for medium-sized fabric internal structures. In the acquisition process, the acquisition positions of the huge and large structures and the relationship between the top and the bottom of the rock stratum corresponding to the labeling sample need to be recorded in detail, so that the homing analysis of the structure frame is established in the indoor research process. Core observations are primarily observations and descriptions of medium-sized textures, sampled for a particular texture.
The total number of the core samples collected is 200.
The tri-stack stratum can be divided into a Feixian group (T1 f), a Jiang river group (T1 j), a Lei Kou slope group (T2 l) and a whisker river group (T3 x) from bottom to top, and according to core observation and well logging curves, the lower tri-stack Feixian group and the lower di-stack Changxing group are analyzed and considered to be in integrated contact with each other, and the upper tri-stack Jiang river group is covered.
TABLE 1 eagle 1 well column
The eagle 1 well mainly takes the phase deposition of a limited platfond and an evaporation platfond in the deposition period of the Feixian group, the evaporation platfond develops a set of evaporation tidal plateau layer sequence containing sulfate and rich dolomite, the lower part is mainly formed by marzistone and algae limestone deposition, the upward climatic environment is gradually dried, the paste content is gradually increased, and the eagle 1 well is more suitable for the survival of microorganisms such as halophilic archaea and the like in the environment, and is favorable for the formation of the microorganism dolomite, so that the eagle 1 well can be found in the upward deposition sequence, and the microorganism dolomite is gradually increased along with the gradual rising of the sulfate content.
2. Deposition background and deposition microphase and deposition environment analysis
Analysis and summary on the basis of the research of the structural background, stratum, paleoclimate and the like of the microbial carbonate rock deposition of the Sanzhu Feixian group in northeast China, the field and core observation are combined to carry out the deposition environment and the deposition microphase analysis.
The method comprises the following steps:
(1) Determination of the content of trace elements and of the content of each mineral in the sample
In this example, trace elements in the sample include B, ga, ca, ba, sr, fe, mn. The contents of normal and trace elements in the sample are measured by a mixed acid digestion method; the mineral content in the sample is determined by an all-rock X-ray diffraction experiment.
(2) Determination of C, O, sr isotope and carbonate lattice S isotope in sample
In the embodiment, a Finnigan MAT 253IRMS gas isotope mass spectrometer is adopted for C, O isotope measurement and analysis; determining the Sr isotope by adopting LA-MC-ICPMS; and analyzing the biogenic carbonate by adopting an MC-ICP-MS solution method, and determining the carbonate lattice S isotope in the sample.
(3) According to the measurement results of the contents of trace elements and minerals, respectively judging a deposition phase and a deposition environment
Wherein, the sedimentary phase is determined to be sea phase or non-sea phase by the element ratio of B/Ga, sr/Ba, sr/Ca and Th/U, fe/Mn, then the paleosalinity of carbonate rock is calculated (generally calculated by using the empirical formula proposed by Keith et al (1964)), and compared with the current normal sea water value, the current sedimentary environment is deduced to be a salty or non-salty water environment.
The empirical formula set forth in Keith et al (1964): z=2.048× (δ 13 C+50)+0.498×(δ 18 O+50)
The larger the salinity index Z value, the higher the salinity. When the Z value is greater than 120, the sea water diagenetic environment is represented; less than 120 represents a fresh water diagenetic environment. Delta 18 The majority of the O isotope is larger than the global average value of sea water in the Guangxi period of the Feixian of the third generation, and the C isotope is similar to the sea water in the same period (delta) 13 0.8 to 3.57 per mill of C isotope; delta 18 O isotope-4.07-2.075%o), which indicates that the environment is closer to the environment with relatively higher salinity; microbial dolomite shows delta 13 C and delta 18 O is slightly biased indicating a slightly higher crystallization and spacing of the humid environment.
In this embodiment, the dolomite types mainly include: the mud crystal dolomite (D0), the mud powder crystal dolomite (D1), the fine grain dolomite (D3), the curdled dolomite (MD-1), the algae laminated dolomite (MD-2) and the sand dust dolomite.
The main development of the North Feixian Guangxi group on the east side of the open river-beam flat sea trough is evaporation tidal flat, limited plat, evaporation plat and plat edge phase, the lower part is deposition of a effusion lake phase mainly comprising cream salt rock-cream cloud rock, the middle part is deposition of a reef (beach) and a microbial mat formed by microbial rocks and granular dolomite of the plat edge-limited plat phase inter-tidal zone, and the lower part is deposition of a limited-open plat phase cloudized algae-containing pellet and chip-forming mud crystal limestone.
Table 2 shows the principal element content table.
TABLE 2
Table 3 shows the trace element content.
TABLE 3 Table 3
3. Influence of diagenetic fluid on microbial dolomite
Firstly, tracing the source of the microorganism dolomite carbon and strontium, the property and source of the diagenetic fluid according to the determination result of the C, O, sr isotope, and distinguishing the difference between the microorganism dolomite carbon and strontium and the contemporaneous seawater.
Then, according to the determination result of the carbonate lattice S isotope, the influence of the diagenetic fluid on the microbial dolomite is tracked. The fluid property and influence of the microorganism dolomite diagenetic can be deeply analyzed by adopting a cloudization fluid tracking technology, including C, O, sr isotope analysis of the paleo-environment of the dolomite, judgment of the fluid property and source and the use of the trace dolomite diagenetic change.
Finally, the uniform temperature, salinity, gas phase and liquid phase composition of the dolomite fluid inclusions were determined. In the embodiment, a cold and hot stage system is adopted to measure the uniform temperature and salinity of the fluid inclusion of the dolomite, and the cold and hot stage system is adopted to carry out laser Raman analysis of the fluid inclusion in combination with a laser confocal microscopic Raman spectrometer to measure the gas phase and liquid phase components of the fluid inclusion in the dolomite.
4. Comprehensive analysis
Through the analysis, the research concept of the process of mineralizing microorganisms in a modern microbial mat to form dolomite is consulted, and the composition and the space-time evolution characteristics of microbial communities under a framework are comprehensively analyzed in the deposition environment and the seawater property change process. And (3) finding out the change characteristics of the dolomite product formed by mineralization of microorganisms and the combination thereof under a multi-scale organization factor frame in the evolution process of the microbial community, revealing the biochemical response process of metabolism of the microbial community and the causal mechanism of the biomineralization in different environments, and finally recovering the ancient deposition environment and the coupling configuration relation.
The invention can improve the judging work efficiency and reliability of the cause relation between the evaporite and the microbial dolomite through reasonable flow design, thereby providing necessary geological basis and theoretical basis for the research of the formation mechanism of the microbial dolomite and providing meaningful guidance for oil and gas exploration and prediction. Besides the Feixian group, the invention can also provide reference for other horizon researches.
The above embodiments are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, and all the modifications or color changes that are not significant in the spirit and scope of the main body design of the present invention are still consistent with the present invention.
Claims (7)
1. A method for quantitatively analyzing a coupling mechanism between ultra-deep evaporite and microbial dolomite, comprising the steps of:
(1) Taking a Sichuan basin ultra-deep carbonate stratum as a research object, determining the distribution rule of the petrophysical characteristics of various dolomite according to core, rock scraps, logging and geophysical data, and then collecting the middle-sized structure developed in the microbial carbonate as a sample according to the distribution rule;
(2) Determining the contents of normal and trace elements and the content of each mineral in the sample, and simultaneously determining C, O, sr isotopes and carbonate lattice S isotopes in the sample; trace elements in the sample include B, ga, ca, ba, sr, fe, mn;
(3) Respectively judging a deposition phase and a deposition environment according to the measurement result of the step (2);
(4) Tracing the source of the microorganism dolomite carbon and strontium and the property and source of the diagenetic fluid according to the determination result of the C, O, sr isotope in the step (2), and judging the difference between the microorganism dolomite carbon and strontium and the contemporaneous seawater; and according to the determination result of the carbonate lattice S isotope, tracing the influence of the diagenetic fluid on the microbial dolomite;
(5) Measuring the uniform temperature, salinity, gas phase and liquid phase components of the dolomite fluid inclusions;
(6) Comprehensively analyzing the deposition environment of the evaporite and the microbial dolomite according to the deposition environment and the measurement results in the steps (3) - (5), and comprehensively analyzing the deposition environment and the seawater property change process by referring to the research concept of the process of mineralizing and forming dolomite by microorganisms in the modern microbial mat, wherein the multiscale structure is formed by the composition and the space-time evolution characteristics of a microbial community under a frame; and (3) finding out the change characteristics of the dolomite product formed by mineralization of microorganisms and the combination thereof under a multi-scale organization factor frame in the evolution process of the microbial community, revealing the biochemical response process of metabolism of the microbial community and the causal mechanism of the biomineralization in different environments, and finally recovering the ancient deposition environment and the coupling configuration relation.
2. The method for quantitatively analyzing the coupling mechanism between the ultra-deep evaporite and the microbial dolomite according to claim 1, wherein in the step (2), the contents of normal and trace elements in the sample are determined by a mixed acid digestion method; the mineral content in the samples was determined by full rock X-ray diffraction experiments.
3. The method according to claim 1 or 2, wherein in the step (3), the deposition phase is determined to be a sea phase or a non-sea phase by the element ratio of B/Ga, sr/Ba, sr/Ca, th/U, fe/Mn.
4. A method for quantitatively analyzing the coupling mechanism between ultra-deep evaporite and microbial dolomite according to claim 3, wherein in step (3), the palettes of the carbonates are calculated and compared with the current normal seawater values to infer that the current sedimentary environment is a salty or non-salty water environment.
5. The method according to claim 4, wherein in the step (2), the biogenic carbonate is analyzed by the MC-ICP-MS solution method to determine the S isotope of carbonate lattice in the sample.
6. The method for quantitative analysis of the coupling mechanism between ultra-deep evaporite and microbial dolomite according to claim 5, wherein in step (5), the uniform temperature and salinity of the dolomite fluid inclusions are measured using a cold and hot bench system.
7. The method for quantitatively analyzing the coupling mechanism between the ultra-deep evaporite and the microbial dolomite according to claim 6, wherein in the step (5), a cold-hot stage system is used for carrying out laser Raman analysis of the fluid inclusion in combination with a laser confocal micro-Raman spectrometer to determine the gas phase and liquid phase components of the fluid inclusion in the dolomite.
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