A method of identifying hot water calcite and hydrothermal calcite

Abstract

A method for identifying hot water calcite and hydrothermal calcite, the method comprising: preparing sample slices of calcite samples of the same layer and different occurrences; determining the organic matter type and abundance characteristics of each sample slice by using an organic petrology analysis method; determining rare earth element data of each sample slice by using an element geochemistry analysis method; determining a formation mode of the sample slice according to the organic matter type, abundance characteristics and the rare earth element data of the sample slice; wherein the formation mode comprises a hot water sedimentation mode and a hydrothermal sedimentation mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil exploration, and particularly relates to a method for identifying hot-water calcite and hydrothermal calcite. BACKGROUND

[0002] At present, many scholars have confirmed that the bright calcite vein in the rock is related to hydrothermal activity, but there is no systematic method to identify the calcite formed in two hydrothermal deposition modes, and therefore, it is particularly important to provide a scientific method for identifying the deposition mode of hydrothermal calcite. SUMMARY

[0003] In view of the above problems, the present application provides a method for identifying hot-water calcite and hydrothermal calcite, which is based on petrology, element geochemistry and isotope geochemistry, and can more accurately select samples to study the influence of hydrothermal activity on the organic matter type and source of hydrocarbon source rocks.

[0004] In the first aspect, the present application provides a method for identifying hot-water calcite and hydrothermal calcite, which comprises: preparing sample thin sections of calcite samples with the same layer and different occurrences; determining the organic matter type and abundance characteristics of each sample thin section by using an organic petrology analysis method; determining the rare earth element data of each sample thin section by using an element geochemistry analysis method; and determining the deposition mode of the sample thin section according to the organic matter type, abundance characteristics and the rare earth element data of the sample thin section; wherein the deposition mode comprises a hot-water deposition mode and a hydrothermal deposition mode.

[0005] Compared with the related art, the present application provides a method for identifying hot-water calcite and hydrothermal calcite, which comprises: preparing sample thin sections of calcite samples with the same layer and different occurrences; determining the organic matter type and abundance characteristics of each sample thin section by using an organic petrology analysis method; determining the rare earth element data of each sample thin section by using an element geochemistry analysis method; and determining the deposition mode of the sample thin section according to the organic matter type, abundance characteristics and the rare earth element data of the sample thin section; wherein the deposition mode comprises a hot-water deposition mode and a hydrothermal deposition mode. The present application is based on a method for comprehensively identifying the formation mode of hot-water and hot-water deposition calcite by using petrology, element geochemistry and isotope geochemistry, and can more accurately select samples to study the influence of hydrothermal activity on the organic matter type and source of hydrocarbon source rocks.

[0006] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. Other advantages of the present application will be realized and attained by the methods particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0007] The accompanying drawings are included to provide a further understanding of the technical solutions of the present application, constitute a part of the specification and are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0008] Figure 1 A flow chart of the method for identifying hot water calcite and hydrothermal calcite in the embodiments of the present application;

[0009] Figure 2 A selection diagram of samples of the Jimsar Sag Lucaogou Formation in some exemplary embodiments;

[0010] Figure 3 A distribution diagram of organic petrology and elemental geochemistry characteristics of calcite with different occurrences in the Lucaogou Formation in the Jimsar Sag in some exemplary embodiments. DETAILED DESCRIPTION

[0011] The present application describes a plurality of embodiments, but the description is exemplary rather than limiting, and it is obvious to those of ordinary skill in the art that there can be more embodiments and implementation schemes within the scope of the embodiments described in the present application. Although many possible combinations of features are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment can be used in combination with any other feature or element of any other embodiment, or can replace any other feature or element of any other embodiment.

[0012] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application can also be combined with any conventional features or elements to form a unique inventive scheme defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other inventive schemes to form another unique inventive scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present application can be implemented alone or in any appropriate combination. Therefore, the embodiments are not limited other than according to the limitations made according to the appended claims and their equivalent replacements. In addition, various modifications and changes can be made within the scope of protection of the appended claims.

[0013] Moreover, in describing representative embodiments, the specification can have presented the method and / or process as a particular sequence of steps. However, to the extent that the method or process depends on the performance of certain steps, the steps need not be performed in the order described. Other sequences of steps can be possible, and are contemplated by those of ordinary skill in the art. Thus, the particular order of the steps set forth in the specification is not an limitation on the claims. Moreover, the claims should not be limited to the performance of steps in the order written, as other sequences of steps can be possible and are contemplated by those of ordinary skill in the art.

[0014] The enrichment of organic matter is a key factor for shale oil to form an economically recoverable scale. Even if the maturity is not high, in-situ heating technology can be applied to convert shale into economically recoverable resources. Current research on the enrichment of organic matter in shale not only focuses on sedimentary aspects such as paleostructure, paleoclimate, and ancient lake water, but more and more people pay attention to the role of event deposition in the enrichment of organic matter. Because event deposition can break the balance of the original lake ecosystem, it directly affects the sedimentary conditions such as water salinity, acidity and alkalinity, oxidation and reduction, and indirectly affects the primary productivity of algae, plankton and microorganisms in the lake. Studies have shown that the formation of many high-quality marine and continental hydrocarbon source rocks has occurred in hot water deposition. The impact of lake bottom hot water activity on organic matter accumulation mainly reflects the changes in the redox conditions and the input of nutrient elements. The lake bottom hot water brings a large amount of reducing gases (CO2, SO2, H2S, etc.) and soluble ionic compounds, which may lead to an increase in lake salinity, causing obvious water stratification, thereby enhancing the accumulation of redox-sensitive elements (such as V, Ni, U and Mo), forming anoxic or anaerobic environment at the bottom of the water column, which is conducive to the preservation of organic matter. At the same time, hot water releases a large amount of nutrient elements (P, Fe, Mn, Cu, Na, etc.) into the lake basin, and phosphorus and iron are essential nutrients for the growth of plankton. Therefore, hot water activity also plays an important role in improving the productivity of ancient lakes. The above research results all reflect the impact of hot water deposition on the burial abundance of sediment organic matter. However, it is found in the research process that part of the hot water activity will be ejected from the sediment and mixed with the sedimentary water, changing the properties of the sedimentary water and thus affecting the enrichment of organic matter; another type of hot water does not eject from the sediment, but instead mixes and cools the formation water in the sediment. This type of deposition mode does not affect the enrichment of organic matter in shale. Therefore, in the sedimentary strata, how to identify the core and lithofacies of hot water deposition mode and hot water deposition mode is a key problem in studying the impact of hot water activity on the enrichment of organic matter.

[0015] In order to achieve the above object, the present application provides a method for comprehensively identifying formation modes of hydrothermal deposition calcite and hot water deposition calcite based on petrology, element geochemistry and isotope geochemistry, which comprehensively identifies different occurrence calcite and its surrounding rock organic petrology, rare earth element geochemistry, cathodoluminescence discriminates formation modes of hydrothermal minerals, and is beneficial to accurately selecting suitable samples to perform influence of hydrothermal on organic matter enrichment.

[0016] The present application provides a method for identifying hot water calcite and hydrothermal calcite, as shown in the accompanying drawings, the method comprises steps S100-S130: Figure 1

[0017] S100: sample slices are made for the calcite samples of the same horizon and different occurrences;

[0018] S110: organic matter types and abundance characteristics of each sample slice are determined by using an organic petrology analysis method;

[0019] S120: rare earth element data of each sample slice are determined by using an element geochemistry analysis method;

[0020] S130: the deposition mode of the sample slice is determined according to the organic matter types, abundance characteristics and the rare earth element data of the sample slice.

[0021] In the present embodiment, the deposition mode comprises a hot water deposition mode and a hydrothermal deposition mode.

[0022] In an exemplary embodiment, sample slices are made for the calcite samples of the same horizon and different occurrences with little difference in burial depth, comprising:

[0023] Firstly, the period of each calcite sample is determined by using a cathodoluminescence method for the calcite samples of the same horizon and different occurrences; in the present step, the calcite samples of different occurrences comprise through-layer calcite samples and in-layer calcite samples, as shown in the accompanying drawings, Figure 2 Figure 2 Fig. a in the middle is in-layer vein calcite, Figure 2 Fig. b in the middle is through-layer vein calcite.

[0024] Secondly, sample slices are made for the calcite samples of the same period.

[0025] In an exemplary embodiment, the sample slice comprises a calcite vein sample slice, a first calcite surrounding rock sample slice and a second calcite surrounding rock sample slice. In the present embodiment, the first calcite surrounding rock is the surrounding rock close to the calcite, and the second calcite surrounding rock is the surrounding rock far away from the calcite.

[0026] ​​In an example embodiment, the thickness of the sample slice is 0.04 mm and does not include a cover glass. In a specific manufacturing process, the non-luminous 502 adhesive is selected to be attached to the glass slide to avoid the interference of the bottom adhesive in the fluorescence observation. The thickness of the rock slice is set to 0.04 mm without a cover glass, which is to facilitate the observation of fluorescence and also to allow micro-area experimental analysis on the same slice.

[0027] In an example embodiment, the organic matter type and abundance characteristics of each sample slice are determined by using an organic petrology analysis method, which includes: performing fluorescence slice observation on the sample slice to determine the organic matter type and abundance characteristics of each sample slice. The fluorescence slice observation can determine the calcite vein body part, and the organic matter type and abundance characteristics of the surrounding rock near and away from the calcite vein body are observed and photographed. The fluorescence observation can be performed by using a Zeiss microscope. The organic matter type is mainly characterized by the morphology of the organic matter, and the development degree is mainly compared by observing the surface porosity of the organic matter.

[0028] In an example embodiment, the rare earth element data of each sample slice is obtained by using an elemental geochemical analysis method, which includes: performing in-situ micro-area microelement analysis on different sample slices to determine the rare earth element data of each sample slice. In this embodiment, the rare earth elements include: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu elements, wherein La, Ce, Pr, Nd, Sm, and Eu are light rare earth elements (LREE), and Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are heavy rare earth elements (HREE).

[0029] In an example embodiment, after determining the rare earth element data of each sample slice by using the elemental geochemical analysis method, the method further includes:

[0030] In a first step, the rare earth element data is normalized by using a chondrite standard to obtain normalized rare earth element data.

[0031] In a second step, a rare earth element distribution characteristic curve is established by using the normalized rare earth element data.

[0032] In an example embodiment, the formation mode of the sample slice is determined according to the organic matter type and abundance characteristics of the sample slice, which includes:

[0033] If the organic matter type of the first sample slice is the same as that of the second sample slice or the abundance characteristics are the same, it is determined that the calcite vein sample slice is of a hydrothermal sedimentary mode.

[0034] If the first sample slice and the second sample slice have different organic matter types or different abundance characteristics, it is determined that the calcite vein sample slice is of a hot water deposition mode. The first calcite surrounding rock is a surrounding rock adjacent to the calcite, and the second calcite surrounding rock is a surrounding rock away from the calcite.

[0035] In the present embodiment, the method for identifying hot water calcite and hydrothermal calcite performed by the present embodiment is mainly based on the following principles:

[0036] (1) Identification of hydrothermal calcite: The elements deposited by hydrothermal deposition have not undergone dilution by sediment transport and burial, and the concentration of rare earth elements is higher than that of the surrounding rock, and the distribution pattern is different from that of the surrounding rock.

[0037] (2) If the calcite is formed by the deposition of hydrothermal water in the lake, it will affect the change of the type and abundance of organic matter during the deposition process.

[0038] According to (1) and (2), the following conclusions are obtained:

[0039] Under the hot water deposition mode, there is a significant difference in the organic petrological characteristics of the surrounding rock adjacent to the calcite and the surrounding rock away from the calcite. If the calcite is formed by mixing of hydrothermal water and newly deposited formation water, there is no difference in the organic petrological characteristics of the surrounding rock adjacent to the calcite and the surrounding rock away from the calcite.

[0040] In an exemplary embodiment, the formation mode of the sample slice is determined according to the rare earth element data, comprising:

[0041] If the rare earth element concentration of the calcite vein sample slice is greater than the rare earth element concentration of the first sample slice and the rare earth element concentration of the second sample slice, and the characteristics of the rare earth element distribution characteristic curve of the first sample slice and the rare earth element distribution characteristic curve of the second sample slice are the same, then the calcite vein sample slice is of a hydrothermal deposition mode.

[0042] If the rare earth element concentration of the calcite vein is greater than the rare earth element concentration of the first sample slice, and the characteristics of the rare earth element distribution characteristic curve of the first sample slice and the rare earth element distribution characteristic curve of the second sample slice are different, then the calcite vein sample slice is of a hot water deposition mode.

[0043] In the present embodiment, the method for identifying hot water calcite and hydrothermal calcite performed by the present embodiment is mainly based on the following principles:

[0044] (1) Identification of hydrothermal calcite: The elements deposited by hydrothermal deposition have not undergone dilution by sediment transport and burial, and the concentration of rare earth elements is higher than that of the surrounding rock, and the distribution pattern is different from that of the surrounding rock.

[0045] (2) If the calcite is formed by the deposition of hydrothermal water in the lake, it will affect the change of the type and abundance of organic matter during the deposition process.

[0046] (3) With the above assumptions, if it is a hot water deposition mode, the rare earth element abundance away from the calcite vein body will be diluted by lake water and reduced, and the rare earth element distribution patterns of the surrounding rock near the calcite and the surrounding rock away from the calcite will be different. The rare earth element characteristics of the surrounding rock near the calcite will be between the calcite vein body and the surrounding rock away from the calcite vein body. If it is a hydrothermal deposition mode, the rare earth element distribution patterns and concentrations near and away from the calcite vein body should be consistent.

[0047] In an example embodiment, the deposition mode of the sample thin section is determined according to the organic matter type, abundance characteristics of the sample thin section, and the rare earth element data.

[0048] The embodiments of the present application have the following technical effects:

[0049] (1) The evidence chain is sufficient, and both visual petrological analysis and element geochemical data are used as support;

[0050] (2) The method is simple and conventional, the sample amount used is small, all experiments can be completed by rock thin sections, and the in-situ experiment does not destroy the integrity of the sample, and the operability and reliability are high.

[0051] Example 1

[0052] A method for identifying hot water calcite and hydrothermal calcite, the specific implementation steps are as follows:

[0053] Step 1, collect different occurrence calcite samples of the same horizon;

[0054] Step 2, make sample thin sections of different occurrence calcite samples;

[0055] Step 3, observe the petrology and cathodoluminescence of the cathodoluminescence thin section to determine the formation period of the calcite vein body. Generally, after determining the period, the early formed calcite is selected for subsequent analysis.

[0056] Step 4, observe the fluorescence thin section, mainly considering the organic matter type and abundance characteristics of the calcite vein body, the surrounding rock near the calcite vein body, and the surrounding rock away from the calcite vein body.

[0057] Step 5, determine the hydrothermal deposition mode or hot water deposition mode through organic petrology comparative analysis.

[0058] In this step, the organic matter source and development degree of the wall rock near the calcite and the wall rock far from the calcite are compared. If the organic matter source of the wall rock near the calcite is different from that of the wall rock far from the calcite, or the organic matter is more developed, it is indicated that the calcite is hot water deposition calcite. If the organic matter source and development degree of the wall rock at different positions have no big difference, it is indicated that the deposition of the calcite has no influence on the enrichment of the organic matter in the shale, and it can be inferred that the calcite is hydrothermal deposition calcite.

[0059] In the sixth step, in-situ micro-area major and trace element analysis is performed on the sample slice, and the in-situ rare earth element data are normalized by using chondrite.

[0060] In this step, the in-situ micro-area major and trace element analysis is mainly performed on the calcite vein part, and the rare earth element difference in the wall rock near and far from the calcite vein is considered.

[0061] The in-situ major and trace elements are analyzed by using a quadrupole inductively coupled plasma mass spectrometer (i Cap-RQ ICP-MS) equipped with a 193 nm ARF excimer laser ablator.

[0062] In this step, the rare earth elements refer to La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu elements, wherein La, Ce, Pr, Nd, Sm and Eu are light rare earth elements (LREE), and Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are heavy rare earth elements (HREE).

[0063] After the in-situ rare earth element data are normalized by using chondrite, a distribution characteristic curve of the normalized rare earth elements is established, wherein the horizontal coordinate is the element name, and the vertical coordinate is the normalized rare earth element concentration.

[0064] In the seventh step, the element geochemical analysis is used to determine the deposition mode.

[0065] Firstly, the rare earth element concentrations of the calcite veins of different samples are compared. The high concentration can be preliminarily judged as hydrothermal calcite, and the low concentration can be judged as hot water deposition calcite.

[0066] Secondly, the rare earth element distribution characteristics of the calcite vein, the wall rock near the calcite vein and the wall rock far from the calcite vein in the sample slice are compared. If the rare earth element distribution characteristics of the wall rock near the calcite vein are different from those of the wall rock far from the calcite vein, it is indicated that the calcite vein is hydrothermal deposition calcite. Figure 3 As shown in the c and d graphs in FIG. 6. If the rare earth element distribution characteristics of the wall rock near the calcite vein are between those of the calcite vein and the wall rock far from the calcite, it is indicated that the calcite is hot water deposition calcite, as shown in the e and f graphs in FIG. 6. Figure 3as shown in the g-diagram and the h-diagram in FIG.

[0067] Eighth step, comprehensive organic petrology and elemental geochemistry analysis to determine the sedimentary model.

[0068] Example two

[0069] The Lucaogou Formation in the Jimsar Sag is the first demonstration base for shale oil exploration and development in China. The organic matter abundance is generally high, with an average of about 6%, and type I and II1 kerogen are developed, which has strong oil generation potential. Previous studies have shown that the area belongs to a salinized lake basin deposition, and the presence of high organic matter abundance has a certain relationship with hydrothermal activity. The core characteristics mainly show that special bedding and cross-bedded calcite veins appear in the study area. However, different occurrences of calcite veins may represent different formation modes, mainly including two types. One is the calcite formed by hydrothermal entering the sedimentary water, which can be subdivided into hot water deposition. This process often affects the organic matter abundance and source of the deposited shale. The other is that the hydrothermal only fills in the just deposited shale, which can be subdivided into hydrothermal deposition and does not affect the quality of the shale during the deposition period. Therefore, in order to trace the two sedimentary phenomena of hydrothermal activity, it is necessary to have a reliable identification basis. In the past, only core and thin section observation means were used for judgment, and there is a lack of objective data support.

[0070] The specific implementation process of the discrimination method of the hydrothermal calcite and hot water calcite of the Lucaogou Formation in the Jimsar Sag is as follows:

[0071] (1) Collect different occurrence calcite samples with little difference in burial depth of the same horizon;

[0072] The sample selection is carried out on the well-X1 well of the Lucaogou Formation in the Jimsar Sag, and the bedding vein calcite and cross-bedding vein calcite samples are selected, as shown in Figure 3 , wherein Figure 3 the a diagram in FIG. shows the cross-bedding vein calcite of the X1 well at 3711.73 m, Figure 3 the b diagram in FIG. shows the cross-bedding vein calcite of the X1 well at 3722.38 m, and the selected cross-bedding vein calcite sample has a deeper burial depth.

[0073] (2) Thin section preparation is carried out on the selected sample;

[0074] The thickness of the thin section is 0.04 mm and no cover glass is used, in order to prevent the rock from being broken by laser in the in-situ experiment.

[0075] (3) Fluorescence observation is carried out on the rock thin section, and the organic matter abundance and type of the sample near the calcite wall rock and far away from the calcite wall rock are compared; mainly considering the calcite vein part, the organic matter type and abundance characteristics of the wall rock near the calcite vein and the wall rock far away from the calcite vein are observed and photographed.

[0076] (4) Based on the observation of rock thin sections, in-situ trace element analysis was performed on the observed rock thin sections. The main test objects were calcite veins, surrounding rocks near calcite veins and those far from calcite veins in different samples.

[0077] (5) Comprehensive identification method for hydrothermal calcite and hot water calcite

[0078] Based on the above identification principle, in-situ rare earth element chondrite-normalized charts of different samples were first drawn. ① Visualized fluorescence thin section observation: When it was observed that there were no differences in lithology and organic matter abundance in the surrounding rocks near and far from the calcite veins ( Figure 3 (Figures a and b in the middle), for example, Figure 3 Figure a shows a predominantly layered algal body. Figure 3 Image b shows a predominantly structural algal body with a similar level of organic matter development, suggesting that this calcite is hydrothermal sedimentary calcite. This is because hydrothermal sedimentary calcite forms after the formation of the surrounding rock and has no impact on the abundance and source of organic matter in the shale. Furthermore, the observation that the organic matter abundance in the surrounding rock adjacent to the calcite vein is significantly higher than that in areas farther away suggests that this calcite is hydrothermal sedimentary calcite. For example: Figure 3 Zhongetu X1 well 3685.73m along the bedding vein calcite and Figure 3 In the X1 well (Figure f), at a depth of 3702.67m, vein-like calcite flows along the bedding plane. The organic matter abundance near the calcite vein is significantly higher than that in areas farther away. This is because when hydrothermal fluids enter the water body, they affect the chemical properties of the sedimentary water over a certain depositional period, thus influencing the type and degree of organic matter development. Secondly, the distribution characteristics of rare earth elements (REEs) in the calcite vein and surrounding rock: First, compare the differences between the calcite vein and surrounding rock in different samples. If the REE abundance in the calcite vein is significantly higher than that in the adjacent surrounding rock, it indicates that the formation of calcite is related to hydrothermal fluids. This is because the REEs in hydrothermal calcite have not undergone the dilution of transport and deposition, resulting in a higher concentration. Furthermore, hydrothermal calcite generally has a higher REE concentration than hot water calcite because it has not entered the water body; therefore, the REE concentration is comparable to that of the original hydrothermal fluid. Figure 3 Figure c in the middle and Figure 3 The concentration of rare earth elements in the middle d-figure is higher than Figure 3 g-graph and Figure 3 The h-value is higher in the middle; moreover, as mentioned above, the formation of hydrothermal calcite does not affect the surrounding rock. Therefore, the rare earth element concentration and distribution pattern of the surrounding rock near and far from the calcite veins will not differ. Figure 3 Chinese C diagram and Figure 3As shown in Figure d, hydrothermal calcite can affect the surrounding rock deposition within a certain range. Therefore, the rare earth element concentration and distribution characteristics near the calcite vein should be between those of the calcite vein and those of the surrounding rock far from it. Figure 3 Chinese g-graph and Figure 3 As shown in Figure h.

[0079] In summary, the organic petrology of rock thin sections and in-situ major and trace element analysis techniques can be used to comprehensively determine the formation mode of different calcite veins, which can be used to trace hydrothermal activity modes and improve the scientific nature of sample selection when studying the effect of hydrothermal activity on the enrichment of organic matter in source rocks.

[0080] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. A method of identifying hot-water calcite and hydrothermal calcite, characterized by, The method comprises: The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; Rare earth element data of the sample slices are determined by using an element geochemistry analysis method; The sedimentary mode of the sample slices is determined according to the organic matter types and abundance characteristics of the first calcite wall rock sample slice and the second calcite wall rock sample slice; The sedimentary mode of the sample slices is determined according to the rare earth element data of the first calcite wall rock sample slice, the second calcite wall rock sample slice and the calcite vein sample slice; The sedimentary mode comprises a hot water sedimentary mode and a hydrothermal sedimentary mode.

2. The method of identifying hot-water calcite and hydrothermal calcite according to claim 1, characterized in that, The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; Rare earth element data of the sample slices are determined by using an element geochemistry analysis method; The sedimentary mode of the sample slices is determined according to the organic matter types and abundance characteristics of the first calcite wall rock sample slice and the second calcite wall rock sample slice; The sedimentary mode comprises a hot water sedimentary mode and a hydrothermal sedimentary mode. The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calcite samples of the same layer and different occurrences are prepared, and the sample slices comprise a calcite vein sample slice, a first calcite wall rock sample slice and a second calcite wall rock sample slice; the first calcite wall rock is adjacent to the calcite; the second calcite wall rock is far away from the calcite; organic matter types and abundance characteristics of the sample slices are determined by using an organic petrology analysis method; The sample slices of the calc If the first sample slice and the second sample slice are of different organic matter types or have different abundance characteristics, the calcite vein sample slice is determined to be of a hydrothermal sedimentation mode.

9. The method of identifying hydrothermal calcite and hydrothermal calcite according to claim 7, characterized in that, determining the sedimentation mode of the sample slice according to the rare earth element data of the first calcite wall rock sample slice, the second calcite wall rock sample slice and the calcite vein sample slice comprises: if the rare earth element concentration of the calcite vein sample slice is greater than the rare earth element concentration of the first sample slice and the rare earth element concentration of the second sample slice, and the characteristics of the first sample slice rare earth element distribution characteristic curve and the second sample slice rare earth element distribution characteristic curve are the same, then the calcite vein sample slice is of a hydrothermal sedimentation mode; if the rare earth element concentration of the calcite vein is greater than the rare earth element concentration of the first sample slice, and the characteristics of the first sample slice rare earth element distribution characteristic curve and the second sample slice rare earth element distribution characteristic curve are different, then the calcite vein sample slice is of a hydrothermal sedimentation mode.

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