A method and device for correcting Sr element content in sediment

Abstract

The present invention provides a method and device for correcting the Sr element content in sediments, the method comprising: obtaining the total Sr element content and the Ca element content of a target work area; establishing a relationship model for characterizing the total Sr element content and the Ca element content; and correcting the total Sr element content of the target work area according to the relationship model, the total Sr element content and the Ca element content. The present invention uses the correlation between the Ca element content and the Sr element content to quantitatively calculate the increment of the Sr element in the sediments caused by carbonate minerals, thereby proposing the Sr element content in fine-grained sediments, and further more accurately restoring the paleoenvironmental characteristics, solving the problem of large deviations in paleoenvironmental identification caused by using the overall Sr element content of the sample for analysis when studying paleo-sedimentary environments, and providing more reliable and accurate paleoenvironmental parameters for the analysis of organic matter enrichment control factors.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration, in particular to the technical field of inorganic geochemistry, and specifically to a method and device for correcting the Sr element content in sediments. Background Art

[0002] In the prior art, organic-rich shale is often used as the basis for the accumulation of conventional and unconventional oil and gas. Its formation is controlled by a variety of paleoenvironmental factors, and the evolution of the paleoenvironment determines the organic matter enrichment process. Inorganic geochemistry and elemental geochemistry are widely used in analyzing the evolution of sedimentary paleoenvironment. During the sedimentation process, the Sr element mainly comes from rivers, and the chemical behavior of the Sr element in lakes or oceans under different conditions is different, so that the derived metal element ratio is often used to indicate the paleoweathering intensity (Rb / Sr) and paleosalinity (Sr / Ba).

[0003] It is understandable that the element information recorded in fine-grained sediments can effectively reflect the geological evolution process of sediments. Since the ionic radius of Sr is similar to that of Ca, Sr is prone to occur. 2+ Replace Ca in carbonate mineral lattices 2+ This phenomenon leads to the abnormal enrichment of Sr in carbonate mineral-rich sediments, increasing the complexity of paleoenvironmental reconstruction.

[0004] When using the Sr element as a geochemical indicator, relevant technical personnel in the industry usually use the overall element content of the sample for analysis, and do not evaluate and correct it according to the geological characteristics of the research object. That is, they do not exclude the influence of the Sr element adsorbed in carbonate minerals, especially the influence of the Sr element adsorbed in carbonate minerals in carbonate-rich strata.

[0005] Therefore, when studying the ancient sedimentary environment of the strata, failure to correct the Sr element content in the sediments will affect the authenticity and reliability of the ancient environment restoration, making it impossible to accurately and scientifically analyze and evaluate the control of the ancient environment on the enrichment of organic matter. Summary of the invention

[0006] In view of the problems in the prior art, the method and device for correcting the Sr element content in sediments provided by the present invention solve the difficult problem of large deviations in paleoenvironmental identification caused by analyzing the overall Sr element content of samples when studying paleo-sedimentary environments in the prior art, provide more reliable and accurate paleoenvironmental parameters for the analysis of factors controlling organic matter enrichment, improve the understanding of the formation mechanism of unconventional oil and gas resources, can accurately restore paleoenvironmental characteristics, and have wide applicability.

[0007] In a first aspect, the present invention provides a method for correcting the Sr element content in a sediment, comprising:

[0008] Obtain the total Sr element content and Ca element content in the target work area;

[0009] Establishing a relationship model for characterizing the total content of the Sr element and the content of the Ca element;

[0010] The total Sr content of the target work area is corrected according to the relationship model, the total Sr content and the Ca content.

[0011] In one embodiment, the correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content includes:

[0012] Determine the base value of the Sr element content in the target work area according to the relationship model;

[0013] Determining the Sr content captured by carbonate minerals in the target work area according to the Sr element content base value and the Ca element content;

[0014] The total Sr content of the target work area is corrected according to the total Sr content and the Sr content captured by the carbonate minerals.

[0015] In one embodiment, when the Sr content captured by the carbonate minerals is greater than the total Sr content, the correction value of the total Sr content of the target work area is 0.

[0016] In one embodiment, before establishing the relationship model for characterizing the total content of the Sr element and the content of the Ca element, the method further includes:

[0017] Determine whether the total content of Sr element and the content of Ca element are positively correlated;

[0018] If so, the relationship model is established.

[0019] In one embodiment, obtaining the total Sr content and the Ca content of the target work area includes:

[0020] Conducting deep continuous sampling of the target layer section of the target work area;

[0021] The collected samples are tested for major and trace elements to determine the total content of the Sr element and the content of the Ca element.

[0022] In a second aspect, the present invention provides a correction device for the Sr element content in a sediment, the device comprising:

[0023] The element content acquisition module is used to obtain the total Sr element content and Ca element content in the target work area;

[0024] A first relationship model building module, used to build a relationship model for characterizing the total content of the Sr element and the content of the Ca element;

[0025] The Sr content correction module is used to correct the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content.

[0026] In one embodiment, the Sr content correction module includes:

[0027] A base value determination unit, used to determine a base value of the Sr element content in the target work area according to the relationship model;

[0028] A captured content determination unit, used to determine the Sr content captured by carbonate minerals in the target work area according to the Sr element content base value and the Ca element content;

[0029] An Sr content correction unit, used for correcting the total Sr content of the target work area according to the total Sr content and the Sr content captured by the carbonate minerals;

[0030] In one embodiment, when the Sr content captured by the carbonate minerals is greater than the total Sr content, the correction value of the total Sr content of the target work area is 0.

[0031] In one embodiment, the correction device for the Sr element content in the sediment further includes:

[0032] A positive correlation judgment module, used to judge whether the total content of the Sr element and the content of the Ca element are positively correlated;

[0033] A second relationship model building module, used for building the relationship model if yes;

[0034] In one embodiment, the element content acquisition module includes:

[0035] A layer sampling unit, used for performing deep continuous sampling of a target layer in the target work area;

[0036] The element content acquisition unit is used to perform main and trace element tests on the collected samples to determine the total content of the Sr element and the content of the Ca element.

[0037] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, steps of a method for correcting the Sr element content in sediment are implemented.

[0038] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for correcting the Sr element content in a sediment.

[0039] From the above description, it can be seen that the correction method and device for the Sr element content in the sediment provided by the embodiment of the present invention first obtains the total Sr element content and the Ca element content of the target work area; then, establishes a relationship model for characterizing the total Sr element content and the Ca element content; finally, corrects the total Sr element content of the target work area according to the relationship model, the total Sr element content and the Ca element content. The present invention uses the correlation between the Ca element content and the Sr element content to quantitatively calculate the increment of the Sr element in the sediment caused by carbonate minerals, thereby proposing the Sr element content in the fine-grained sediment, and then more accurately restores the paleoenvironmental characteristics, solves the problem of large deviations in paleoenvironmental identification caused by using the overall Sr element content of the sample for analysis when studying the paleo-sedimentary environment, provides more reliable and accurate paleoenvironmental parameters for the analysis of organic matter enrichment control factors, improves the understanding of the formation mechanism of unconventional oil and gas resources, and has a wide range of applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 This is a schematic diagram of the first structure of the correction system for the Sr element content in the sediment of the embodiment of the present application;

[0042] Figure 2 A second structural schematic diagram of the correction system for the Sr element content in the sediment of the embodiment of the present application;

[0043] Figure 3 The process diagram of the correction method of the Sr element content in the sediment in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0044] Figure 4 is a flow chart of step 300 in an embodiment of the present invention;

[0045] Figure 5 The process diagram of the correction method of the Sr element content in the sediment in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0046] Figure 6is a flow chart of step 100 in an embodiment of the present invention;

[0047] Figure 7 The process diagram of the correction method of the Sr element content in the sediment in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0048] Figure 8 It is a schematic flow chart of a method for correcting the Sr element content in sediments in a specific application example of the present invention;

[0049] Fig. 9 It is a cross plot of the abundance of Sr and Ca elements measured in the sample in the specific application example of the present invention;

[0050] Fig.10 The paleo-salinity parameter (Sr) calculated from the corrected Sr content in the specific application example of the present invention 校正 / Ba) and the paleo-salinity parameter (Sr 样本 Schematic diagram of the comparison curve of / Ba).

[0051] Fig.11 The composition diagram of the correction device for the Sr element content in the sediment in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0052] Fig.12 Schematic diagram of the composition of the Sr content correction module 30 in an embodiment of the present invention;

[0053] Fig.13 The composition diagram of the correction device for the Sr element content in the sediment in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0054] Fig.14 Schematic diagram of the composition of the element content acquisition module 10 in an embodiment of the present invention;

[0055] Fig.15 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0058] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising 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 apparatuses.

[0059] The present application also provides a correction system for the Sr element content in sediments, see Figure 1 The system may be a server A1, which may be connected to multiple formation element content measuring instruments B1 in communication, and the server A1 may be connected to multiple databases in communication, or Figure 2 As shown, these databases can also be directly set in the server A1. The formation element content measuring instrument B1 is used to obtain the total Sr element content and the Ca element content of the target layer section of the target block. After collecting the total Sr element content and the Ca element content, the server A1 corrects the Sr element content in the target layer section sediment in the target work area.

[0060] It is understandable that the client C1 may include a smart phone, a tablet electronic device, a network set-top box, a portable computer, a desktop computer, a personal digital assistant (PDA), a vehicle-mounted device, a smart wearable device, etc. Among them, the smart wearable device may include smart glasses, a smart watch, a smart bracelet, etc.

[0061] In practical applications, the part of correcting the Sr element content in the sediment can be executed on the server A1 side as described above, that is, Figure 1 or Figure 2 The architecture shown can also be that all operations are completed in the client C1 device. The specific selection can be based on the processing capability of the client device and the limitations of the user's usage scenario. This application does not limit this. If all operations are completed in the client device, the client device can also include a processor for performing operations such as processing the correction of the Sr element content in the sediment.

[0062] The client C1 device mentioned above may have a communication module (i.e., a communication unit) that can communicate with a remote server to realize data transmission with the server. The server may include a server on the side that corrects the Sr element content in the target layer sediment in the target work area, and other implementation scenarios may also include a server of an intermediate platform, such as a server of a third-party server platform that has a communication link with the correction server of the Sr element content in the sediment. The server may include a single computer device, or a server cluster consisting of multiple servers, or a server structure of a distributed device.

[0063] The server and the client device may communicate using any suitable network protocol, including network protocols that have not yet been developed on the date of filing this application. Network protocols may include, for example, TCP / IP, UDP / IP, HTTP, HTTPS, etc. Of course, network protocols may also include, for example, RPC (Remote Procedure Call Protocol) and REST (Representational State Transfer) protocols used on top of the above protocols.

[0064] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0065] The embodiment of the present invention provides a specific implementation method of a method for correcting the Sr element content in a sediment, see Figure 3 , the method specifically includes the following contents:

[0066] Step 100: Obtain the total Sr element content and the Ca element content in the target work area.

[0067] Strontium (Sr) is a trace element widely distributed in nature. It is distributed in rocks, soils, water bodies and organisms, and its concentration and isotopic composition vary widely. Since strontium isotopes are not fractionated by chemical, biological and geological processes (rainfall / mineral dissolution processes), changes in their isotopic ratios are only related to the mixing of strontium from different sources. Therefore, strontium isotopes have always been considered to be effective geochemical tracers and are widely used in the study of material migration and transformation processes, carbonate diagenesis, reflecting sedimentary environments, indicating the properties of source areas, and evaluating chemical weathering rates. However, in carbonate-rich strata, it is easy for Sr to be highly enriched in sediments. In this case, if the total Sr content in the strata is used as a parameter for studying the ancient sedimentary environment of the strata, that is, if the Sr content in the sediments is not analyzed due to the occurrence of Sr. 2+ Replace Ca in carbonate mineral lattices2+ If the corrections that should be made due to the phenomenon are not carried out, the paleoenvironment of the sediments cannot be truly restored, and thus the control of the paleoenvironment on the enrichment of organic matter cannot be accurately and scientifically analyzed and evaluated.

[0068] Step 200: Establishing a relationship model for characterizing the total content of the Sr element and the content of the Ca element.

[0069] It can be understood that the relationship model in step 200 is used to indicate the relationship between the total content of Sr elements and the content of Ca elements in the sediments, and further to determine the influence of carbonate minerals in the sediments on the content of Sr elements.

[0070] When step 200 is implemented, the relationship between the total content of Sr elements and the content of Ca elements can be determined according to the cross-plot method, or the relationship between the two can be determined using a machine learning method.

[0071] Step 300: Correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content.

[0072] On the basis of step 200, the Sr element content increment caused by carbonate rocks in the sediment can be obtained according to the relationship model and the Ca element content. Then, this part of the error is deducted from the total Sr element content to obtain a more accurate Sr element content in the sediment.

[0073] From the above description, it can be seen that the correction method of the Sr element content in the sediment provided by the embodiment of the present invention first obtains the total Sr element content and the Ca element content of the target work area; then, establishes a relationship model for characterizing the total Sr element content and the Ca element content; finally, corrects the total Sr element content of the target work area according to the relationship model, the total Sr element content and the Ca element content. The present invention solves the key problem of the accuracy of the Sr element content used to indicate the parameter in the restoration of the ancient sedimentary environment characteristics of the stratum in the prior art, corrects and determines the Sr element content contained in the fine-grained sediments in the stratum, guides the accurate understanding of the ancient sedimentary environment, and provides important technical support for the control of organic matter enrichment.

[0074] In one embodiment, see Figure 4 , step 300 further comprises:

[0075] Step 301: determining the base value of the Sr element content in the target work area according to the relationship model;

[0076] Step 302: Determine the Sr content captured by carbonate minerals in the target work area according to the Sr element content base value and the Ca element content;

[0077] Step 303: Correct the total Sr content of the target work area according to the total Sr content and the Sr content captured by the carbonate minerals.

[0078] In step 301 to step 302, firstly, a cross plot of the total Sr content and the Ca content of the samples in the target work area is established. According to the cross plot of the overall Sr content and Ca of the samples, the baseline value of the Sr content is determined, that is, the Sr content adsorbed by fine-grained sediments in the samples with low carbonate mineral content. Then, the regression equation Sr=f(Ca) between the measured Sr and Ca is obtained by fitting, and the expression of the Sr content captured by carbonate minerals is established:

[0079] Sr 碳酸盐 =f(Ca 样本 )-Sr 基线

[0080] Among them, Sr 碳酸盐 is the Sr content captured by carbonate minerals, ppm; Ca 样本 is the measured Ca content of the sample as a whole, %; Sr 基线 is the baseline value of Sr element, ppm;

[0081] According to the characteristics that Sr in sediments is mainly attached to carbonate mineral lattices and fine-grained sediments, the Sr element content in the fine-grained sediments of the sample, that is, the corrected Sr content, is calculated. The calculation formula is shown in formula (1):

[0082]

[0083] Among them, Sr 校正后 is the Sr content of the sample after correction, ppm; Sr 细粒沉积 is the Sr content in fine-grained sediments, ppm; Sr 样本 is the measured Sr content of the entire sample, ppm.

[0084] In one embodiment, when the Sr content captured by the carbonate minerals is greater than the total Sr content, the correction value of the total Sr content of the target work area is 0.

[0085] See Sr in formula (1) 碳酸盐 >Sr 样本 In this case, the Sr content of carbonate minerals predicted by regression is greater than the Sr content of the sample. This may be because the carbonate components in the sample were not formed simultaneously with the fine-grained sediments, but are carbonate minerals formed by later diagenesis. That is, the increase in Ca in the sample caused by this reason will not lead to abnormal enrichment of Sr. Therefore, in this case, the Sr content in the sample does not need to be corrected.

[0086] In one embodiment, see Figure 5 Before step 200, the method for correcting the Sr element content in the sediment further includes:

[0087] Step 180: Determine whether the total content of Sr element and the content of Ca element are positively correlated;

[0088] Step 190: If yes, establish the relationship model.

[0089] In step 180 and step 190, only when it is determined that the total content of Sr and the content of Ca are positively correlated, it is indicated that the paleoenvironment where the sediment is located has experienced Sr. r2+ Replace Ca in carbonate mineral lattices 2+ That is to say, it is meaningful to perform step 200 and the steps thereafter. It can be understood that steps 180 and 190 are of great significance for saving system costs.

[0090] In one embodiment, see Figure 6 , step 100 comprises the following steps:

[0091] Step 101: performing continuous depth sampling on a target layer section of the target work area;

[0092] Step 102: Performing main and trace element tests on the collected samples to determine the total content of the Sr element and the content of the Ca element.

[0093] In step 101 and step 102, specifically, the main and trace element contents of samples collected at continuous depths in the same research layer in the target block are analyzed and tested to obtain the overall Sr (wt.ppm) and Ca (wt.%) contents of the samples, and the influence of carbonate minerals on the Sr content is determined through the correlation between the Sr and Ca element contents.

[0094] In one embodiment, see Figure 7 , the correction method for the Sr element content in the sediment also includes:

[0095] Step 400: Check the corrected Sr element content.

[0096] Specifically, the corrected Sr element content can be verified according to the paleo-sedimentary environmental properties of the target work area.

[0097] To further illustrate the present invention, the present invention also takes the shale of the Da'anzhai section of the Jurassic Ziliujing Formation in the central area of ​​the Sichuan Basin as a research object, and provides a specific application example of the correction method of the Sr element content in the sediment. The specific application example specifically includes the following contents, see Figure 8 .

[0098] S1: Analyze and test the main and trace element contents of samples collected at continuous depths in the same research layer to obtain the overall Sr (wt.ppm) and Ca (wt.%) contents of the samples.

[0099] The study area is a typical continental lake basin deposit. For the coring well Penglai 10, continuous sampling is carried out at the depth of the target layer, and the lithology and depth of the samples are recorded. The sampling interval can be 1-4m, and the major and trace element contents of the collected samples are analyzed and determined to obtain the trace element Sr and major element Ca contents of the samples; and then the influence of carbonate minerals on the Sr content is determined by the correlation between the Sr and Ca element contents. Table 1 shows the sample information collected in the embodiment of the present invention and the corresponding overall Sr (wt.ppm) and Ca (wt.%) contents.

[0100] Table 1

[0101]

[0102] S2: Determine whether the Sr element content and the Ca element content show a strong positive correlation characteristic.

[0103] The influence of carbonate minerals on the enrichment of Sr in sediments can be determined by fitting the correlation between Sr and Ca. 2 >0.64), it is believed that the increase of carbonate minerals will lead to excessive enrichment of Sr in sediments; Fig. 9 The Sr and Ca content measured in the shale samples of the Zhongda'anzhai Member showed a strong positive correlation, indicating that the carbonate mineral content in the sediment affects the enrichment of the Sr element.

[0104] S3: Based on the Sr and Ca cross-plot, determine the baseline value of the Sr element content and the regression equation between Sr and Ca Sr = f(Ca), and establish an expression for the Sr element content in carbonate minerals.

[0105] The expression of the Sr element content in the carbonate mineral established in step S3 is shown in formula (2):

[0106] Sr 碳酸盐 =f(Ca 样本 )-Sr 基线 (2)

[0107] pass Fig. 9 The baseline value is determined by the cross-plot of Sr and Ca of the Da'anzhai shale sample:

[0108] Sr 基线 =160ppm,

[0109] The baseline value indicates the adsorbed Sr content in fine-grained sediments under the influence of low-carbonate minerals; and the regression equation for calculating the Sr content and Ca content in the Da'anzhai section sediments is established by linear fitting:

[0110] Sr(ppm)=13.632×Ca(%)+203.528;

[0111] According to the fact that the total amount of Sr in sediments is the sum of the Sr content in fine-grained sediments and the Sr content in carbonate minerals, a calculation formula for the abundance of Sr captured by carbonate minerals can be established:

[0112] Sr 碳酸盐 (ppm) = 13.632 × Ca 样品 (%) +203.528-160;

[0113] S4: According to the Sr content captured by carbonate minerals in the sample and the overall Sr content of the sample, a calculation model for correcting the Sr content is established, and the corrected Sr content in the sediment is calculated;

[0114] Table 2 shows the Sr content captured by carbonate minerals in the Da'anzhai Member sediments obtained by the calculation model. 碳酸盐 , which indicates the increase in Sr content caused by Sr replacing Ca in the carbonate mineral lattice after carbonate minerals are mixed into the sediments; therefore, the Sr content of fine-grained sediments in the formation can be restored according to the increment caused by carbonates, that is, the corrected Sr content, and the calculation model is as follows:

[0115]

[0116] Among them, Sr 校正后 is the Sr content of the sample after correction, ppm; Sr 细粒沉积 is the Sr content in fine-grained sediments, ppm; Sr 样本 is the measured Sr content of the whole sample, ppm;

[0117] The corrected Sr content calculated according to the model is shown in Table 2. Compared with the original Sr content, it can be seen that the carbonate minerals in this area have a greater impact on the Sr content in the formation, that is, the effect of Sr content correction is obvious.

[0118] Table 2

[0119]

[0120] S5: Reconstruct the paleoenvironmental characteristics of the sedimentary process in the study area based on the corrected sediment Sr content and verify the validity of the correction;

[0121] In this embodiment, the Sr obtained according to the calculation model 校正后 The Sr / Ba ratio was used to characterize the paleo-salinity of the Da'anzhai section of the study area. 校正 / Ba and the original Sr of the sample 样本 / Ba is shown in Table 2. According to the indicative significance of the Sr / Ba ratio in paleo-salinity restoration: Generally, when Sr / Ba is between 0 and 0.5, it is a freshwater environment; when Sr / Ba is between 0.5 and 1, it is a brackish water environment; and when Sr / Ba>1, it is a saltwater environment. The shale formation of the Da'anzhai member of the Jurassic Ziliujing Formation in the Sichuan Basin in this example, predecessors revealed that the sedimentary period was a terrestrial freshwater lake basin from the perspectives of geological phenomena, paleontology, and mineral composition. Fig.10 The corrected paleo-salinity parameter (Sr 校正 / Ba) and the paleo-salinity parameter (Sr 样本 / Ba) in the vertical distribution, it can be seen that the original Sr 样本 / Ba shows that the paleo-salinity of the shale formations in the Da'anzhai Member varies greatly, even reaching a saline water environment, which contradicts the previous geological understanding of freshwater lake basin sedimentation, and the possibility of a large-scale change in the salinity of inland lakes in a short geological period is low; compared with the corrected Sr 校正后 / Ba, which is a freshwater environment as a whole, which is consistent with the actual sedimentary environment of the Da'anzhai shale strata, indicating that the carbonate minerals in the Da'anzhai strata significantly affect the Sr content in the sediments. The use of the corrected Sr content for paleoenvironmental evaluation and analysis is more accurate and reliable.

[0122] From the above description, it can be seen that the correction method of the Sr element content in the sediment provided by the embodiment of the present invention first obtains the total Sr element content and the Ca element content of the target work area; then, establishes a relationship model for characterizing the total Sr element content and the Ca element content; finally, corrects the total Sr element content of the target work area according to the relationship model, the total Sr element content and the Ca element content. The present invention proposes for the first time a method for correcting the Sr content in the sediment by determining a calculation model for the Sr element content increment caused by carbonate minerals based on the relationship between the overall Sr element content and the Ca element content in the sediment. The beneficial effects of this method are as follows:

[0123] 1. According to the cross plot of Sr and Ca content measured in the sample, the baseline value of Sr content and the regression equation between Sr and Ca, Sr=f(Ca), were determined to establish a calculation model for the Sr content captured by carbonate minerals;

[0124] 2. According to the Sr content captured by the carbonate minerals of the sample and the Sr content of the whole sample, a calculation model for the corrected Sr content is established;

[0125] 3. Reconstruct the paleoenvironmental characteristics of the sedimentation process in the study area based on the corrected Sr element content calculated from the geochemical parameters of the sediment samples.

[0126] Based on the same inventive concept, the embodiments of the present application also provide a correction device for the Sr element content in the sediment, which can be used to implement the method described in the above embodiments, such as the following embodiments. Since the principle of solving the problem by the correction device for the Sr element content in the sediment is similar to the correction method for the Sr element content in the sediment, the implementation of the correction device for the Sr element content in the sediment can refer to the implementation of the correction method for the Sr element content in the sediment, and the repetitions will not be repeated. As used below, the term "unit" or "module" can implement a combination of software and / or hardware for a predetermined function. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0127] The embodiment of the present invention provides a specific implementation of a correction device for the Sr element content in a sediment that can implement a correction method for the Sr element content in the sediment, see Fig.11 The correction device for the Sr element content in the sediment specifically includes the following contents:

[0128] The element content acquisition module 10 is used to obtain the total Sr element content and the Ca element content in the target work area;

[0129] A first relationship model building module 20, used to build a relationship model for characterizing the total content of the Sr element and the content of the Ca element;

[0130] The Sr content correction module 30 is used to correct the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content.

[0131] In one embodiment, see Fig.12 , the Sr content correction module 30 comprises:

[0132] A base value determination unit 30a, configured to determine a base value of the Sr element content in the target work area according to the relationship model;

[0133] A captured content determination unit 30b, used to determine the Sr content captured by carbonate minerals in the target work area according to the Sr element content base value and the Ca element content;

[0134] An Sr content correction unit 30c, used to correct the total Sr content of the target work area according to the total Sr content and the Sr content captured by the carbonate minerals;

[0135] In one embodiment, when the Sr content captured by the carbonate minerals is greater than the total Sr content, the correction value of the total Sr content of the target work area is 0.

[0136] In one embodiment, see Fig.13 , the correction device for the Sr element content in the sediment also includes:

[0137] A positive correlation determination module 18a is used to determine whether the total content of the Sr element and the content of the Ca element are positively correlated;

[0138] A second relationship model building module 19a, for building the relationship model if yes;

[0139] In one embodiment, see Fig.14 , the element content acquisition module 10 includes:

[0140] The layer sampling unit 10a is used to perform deep continuous sampling of the target layer in the target work area;

[0141] The element content acquisition unit 10b is used to perform main and trace element tests on the collected samples to determine the total content of the Sr element and the content of the Ca element.

[0142] From the above description, it can be seen that the correction device for the Sr element content in the sediment provided by the embodiment of the present invention first obtains the total Sr element content and the Ca element content of the target work area; then, establishes a relationship model for characterizing the total Sr element content and the Ca element content; finally, corrects the total Sr element content of the target work area according to the relationship model, the total Sr element content and the Ca element content. The present invention uses the correlation between the Ca element content and the Sr element content to quantitatively calculate the increment of the Sr element in the sediment caused by carbonate minerals, thereby proposing the Sr element content in the fine-grained sediment, and then more accurately restores the paleoenvironmental characteristics, solves the problem of large deviations in paleoenvironmental identification caused by using the overall Sr element content of the sample for analysis when studying the paleo-sedimentary environment, provides more reliable and accurate paleoenvironmental parameters for the analysis of organic matter enrichment control factors, improves the understanding of the formation mechanism of unconventional oil and gas resources, and has a wide range of applicability.

[0143] The embodiments of the present application also provide a specific implementation of an electronic device capable of implementing all steps in the method for correcting the Sr element content in the sediment in the above embodiment, see Fig.15 , electronic equipment specifically includes the following:

[0144] Processor (processor) 1201, memory (memory) 1202, communication interface (CommunicationsInterface) 1203 and bus 1204;

[0145] The processor 1201, the memory 1202, and the communication interface 1203 communicate with each other through the bus 1204; the communication interface 1203 is used to realize information transmission between the server device and the client device and other related devices;

[0146] The processor 1201 is used to call the computer program in the memory 1202. When the processor executes the computer program, all the steps in the method for correcting the Sr element content in the sediment in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0147] Step 100: Obtain the total Sr element content and Ca element content of the target work area;

[0148] Step 200: Establishing a relationship model for characterizing the total content of the Sr element and the content of the Ca element;

[0149] Step 300: Correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content.

[0150] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps in the method for correcting the Sr element content in the sediment in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the method for correcting the Sr element content in the sediment in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0151] Step 100: Obtain the total Sr element content and Ca element content of the target work area;

[0152] Step 200: Establishing a relationship model for characterizing the total content of the Sr element and the content of the Ca element;

[0153] Step 300: Correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content.

[0154] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0155] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0156] Although the present application provides method operation steps such as embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0157] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0158] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0159] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0160] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0161] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0162] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0163] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A method for correcting the Sr element content in sediments, characterized in that: include: Obtain the total Sr element content and Ca element content in the target work area; Establishing a relationship model for characterizing the total content of the Sr element and the content of the Ca element; Correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content; The correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content includes: Determine the base value of the Sr element content in the target work area according to the relationship model; Determining the Sr content captured by carbonate minerals in the target work area according to the Sr element content base value and the Ca element content; The total Sr content of the target work area is corrected according to the total Sr content and the Sr content captured by the carbonate minerals.

2. The calibration method according to claim 1, characterized in that: When the Sr content captured by the carbonate minerals is greater than the total Sr element content, the correction value of the total Sr element content in the target work area is 0.

3. The calibration method according to claim 1, characterized in that: Before establishing the relationship model for characterizing the total content of the Sr element and the content of the Ca element, the method further includes: Determine whether the total content of Sr element and the content of Ca element are positively correlated; If so, the relationship model is established.

4. The calibration method according to claim 1, characterized in that: The method of obtaining the total Sr element content and the Ca element content of the target work area includes: Conducting deep continuous sampling of the target layer section of the target work area; The collected samples are tested for major and trace elements to determine the total content of the Sr element and the content of the Ca element.

5. A correction device for the Sr element content in sediments, characterized in that: include: The element content acquisition module is used to obtain the total Sr element content and Ca element content in the target work area; A first relationship model building module, used to build a relationship model for characterizing the total content of the Sr element and the content of the Ca element; An Sr content correction module, used for correcting the total Sr content of the target work area according to the relationship model, the total Sr content and the Ca content; The Sr content correction module comprises: A base value determination unit, used to determine a base value of the Sr element content in the target work area according to the relationship model; A captured content determination unit, used to determine the Sr content captured by carbonate minerals in the target work area according to the Sr element content base value and the Ca element content; The Sr content correction unit is used to correct the total Sr content of the target work area according to the total Sr content and the Sr content captured by the carbonate minerals.

6. The calibration device according to claim 5, characterized in that: When the Sr content captured by the carbonate minerals is greater than the total Sr element content, the correction value of the total Sr element content in the target work area is 0.

7. The calibration device according to claim 5, characterized in that: Also includes: A positive correlation judgment module, used to judge whether the total content of the Sr element and the content of the Ca element are positively correlated; A second relationship model building module, used for building the relationship model if yes; The element content acquisition module comprises: A layer sampling unit, used for performing deep continuous sampling of a target layer in the target work area; The element content acquisition unit is used to perform main and trace element tests on the collected samples to determine the total content of the Sr element and the content of the Ca element.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for correcting the Sr element content in the sediment according to any one of claims 1 to 4 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for correcting the Sr element content in the sediment described in any one of claims 1 to 4 are implemented.

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