Method and device for quantitatively characterizing intensity of ancient sea invasion activity

Abstract

The invention discloses a method and device for quantitatively characterizing the intensity of ancient sea invasion activity, and the method comprises the steps: collecting a drilling core sample of a target area; the method comprises the following steps: treating a drilling core sample by adopting a Soxhlet extraction method to obtain a chloroform bitumen A solution in the core sample; extracting a saturated hydrocarbon component in the chloroform bitumen A solution by adopting a component separation method; carrying out quantitative analysis on the extracted saturated hydrocarbon component, determining GI and ETR of the drilling core sample according to an analysis result, and calculating a biomarker sea invasion activity intensity index BI according to the GI and ETR; performing main trace element analysis on the drilling core sample, determining the content ratio of strontium to barium and the content ratio of magnesium to aluminum in the drilling core sample, and calculating a trace element sea invasion activity intensity index EI; according to the BI and the EI, representing the paleo-sea invasion activity intensity. The method solves the problem that the prior art cannot quantitatively characterize the influence intensity of the sea invasion activity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lake paleoenvironment recovery, and in particular to a method and device for quantitatively characterizing the intensity of paleo-invasion. BACKGROUND

[0002] This section is intended to provide background or context to the embodiments of the application recited in the claims. The description herein does not constitute admission that the prior art is prior art nor does it constitute an admission of any description in the section as prior art unless expressly so stated.

[0003] Invasion is a common geological event in geological history, and is also an important factor affecting the evolution of paleoenvironment and paleo-biomarker in continental lake basin. Previous studies have shown that invasion can bring marine algae and plankton biomarkers to continental lake basin, and also has an important impact on the stratification and oxidation-reduction conditions of lake water. The study of the impact of invasion on continental lake basin can not only reveal the sedimentary paleoenvironmental changes and the evolution mechanism of paleo-biomarker, but also is an important content of the development mechanism of high-quality hydrocarbon source rock, which has important scientific exploration and production practice significance.

[0004] The prior art qualitatively characterizes the intensity of invasion according to the absolute content of marine algae biomarker markers such as n-propyl cholestan and isopropyl cholestan. However, the qualitative evaluation of the intensity of invasion in a certain geological history by using biomarker markers has the following problems. On the one hand, it leads to a lack of basic parameter characterization in related research, and the impact of invasion on sedimentary environment and hydrocarbon biomarker in different studies is difficult to quantitatively compare, resulting in some contradictory research conclusions. On the other hand, the absolute content of biomarker markers is affected by the preservation conditions and thermal evolution degree of organic matter, and the absolute quantitative operation of biomarker markers is complicated, so it is difficult to quantitatively compare the impact of invasion on different layers and different regional strata.

[0005] Therefore, it is urgent to establish an index that can quantitatively characterize the impact of invasion and has simple operation and less affected factors. SUMMARY

[0006] The embodiments of the present application provide a method for quantitatively characterizing the intensity of paleo-invasion, which solves the problem that the prior art cannot quantitatively characterize the impact of invasion. The method comprises the following steps:

[0007] After excluding the influence of salt rock weathering and hydrothermal activity on the salinity of lake water in the target area through geological analysis, the drilling core samples in the target area are collected;

[0008] The Soxhlet extraction method is used to process the drilling core samples to obtain a chloroform bitumen A solution in the core samples; the saturated hydrocarbon component in the chloroform bitumen A solution is extracted by using a component separation method; the chloroform bitumen A solution includes saturated hydrocarbon components and aromatic hydrocarbon components;

[0009] Quantitative analysis was performed on the extracted saturated hydrocarbon components. Based on the analysis results, the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drilling core samples were determined. Based on the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drilling core samples, the marine transgression intensity index (BI) of the biomarker was calculated.

[0010] Major and trace element analysis was performed on the drilling core samples to obtain the results. Based on the results, the ratios of strontium to barium and magnesium to aluminum in the drilling core samples were determined. Based on the ratios of strontium to barium and magnesium to aluminum in the drilling core samples, the trace element transgression activity intensity index EI was calculated.

[0011] The intensity of ancient marine transgression is characterized by the biometric transgression intensity index BI and the elemental transgression intensity index EI.

[0012] This invention also provides an apparatus for quantitatively characterizing the intensity of ancient marine transgression activities, thereby addressing the problem that existing technologies cannot quantitatively characterize the intensity of the impact of marine transgression activities. The apparatus includes:

[0013] The drilling core sample collection module is used to collect drilling core samples from the target area after geological analysis has ruled out the influence of salt rock weathering and hydrothermal activity on the salinity of lake water in the target area.

[0014] The saturated hydrocarbon component extraction module is used to process drill core samples using Soxhlet extraction to obtain a chloroform bitumen A solution from the core sample; and to extract saturated hydrocarbon components from the chloroform bitumen A solution using a component separation method; the chloroform bitumen A solution includes saturated hydrocarbon components and aromatic hydrocarbon components;

[0015] The biomarker transgression activity intensity index calculation module is used to perform quantitative analysis on the extracted saturated hydrocarbon components. Based on the analysis results, the gammacerane index (GI) and long-chain tricyclic terpene ratio (ETR) of the drilling core sample are determined. Based on the gammacerane index (GI) and long-chain tricyclic terpene ratio (ETR) of the drilling core sample, the biomarker transgression activity intensity index (BI) is calculated.

[0016] The trace element transgression activity intensity index calculation module is used to perform major and trace element analysis on drilling core samples, obtain the major and trace element analysis results, determine the content ratio of strontium to barium and magnesium to aluminum in the drilling core samples based on the major and trace element analysis results, and calculate the trace element transgression activity intensity index EI based on the content ratio of strontium to barium and magnesium to aluminum in the drilling core samples.

[0017] The paleomarine transgression intensity characterization module is used to characterize the intensity of paleomarine transgression based on the biota transgression intensity index BI and the element transgression intensity index EI.

[0018] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for quantitatively characterizing the intensity of ancient marine transgression activities.

[0019] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for quantitatively characterizing the intensity of ancient marine transgression.

[0020] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for quantitatively characterizing the intensity of ancient marine transgression activities.

[0021] In this embodiment of the invention, after ruling out the influence of salt rock weathering and hydrothermal activity on the salinity of the lake water in the target area through geological analysis, borehole core samples are collected from the target area. The borehole core samples are processed using Soxhlet extraction to obtain a chloroform bitumen A solution. Saturated hydrocarbon components are extracted from the chloroform bitumen A solution using a component separation method. The chloroform bitumen A solution includes saturated hydrocarbon components and aromatic hydrocarbon components. Quantitative analysis is performed on the extracted saturated hydrocarbon components, and the gamma acene index (GI) and long-chain tricyclic terpene ratio (ETR) of the borehole core samples are determined based on the analysis results. The gamma-cerane index (GI) and the long-chain tricyclic terpene ratio (ETR) are used to calculate the biomarker transgression activity intensity index (BI). Major and trace element analysis is performed on the drill core samples to obtain the results. Based on these results, the ratios of strontium to barium and magnesium to aluminum in the drill core samples are determined. The trace element transgression activity intensity index (EI) is then calculated based on these ratios. The intensity of paleomarginal transgression activity is characterized by the biomarker transgression activity intensity index (BI) and the elemental transgression activity intensity index (EI). In this process, the present invention actively screens out major interfering sources such as salt rock weathering and hydrothermal activity, ensuring that subsequent salinity changes are only related to the intensity of transgression activity, thus avoiding the influence of other factors. By using the biomarker transgression activity intensity index and the elemental transgression activity intensity index, the intensity of transgression activity is transformed from a qualitative description into a quantifiable indicator, solving the problem that existing technologies cannot quantitatively characterize the intensity of transgression activity. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0023] Figure 1 This is a flowchart illustrating the method for quantitatively characterizing the intensity of ancient marine transgression activities in an embodiment of the present invention;

[0024] Figure 2 This is a trend chart of the CIA (climate change index) and GI (gammacerane index) of the Nenjiang Formation in well GY3HC of a certain basin in an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram reflecting the intensity of marine transgression in the Nenjiang Formation of a basin in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of a device for quantitatively characterizing the intensity of ancient marine transgression activities in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of a computer device in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0029] Figure 1 This is a flowchart of a method for quantitatively characterizing the intensity of ancient marine transgression activities in an embodiment of the present invention. The method includes:

[0030] Step 101: After ruling out the influence of salt rock weathering and hydrothermal activity on the salinity of lake water in the target area through geological analysis, collect drilling core samples from the target area.

[0031] Step 102: The drilling core sample is processed using Soxhlet extraction to obtain chloroform bitumen A solution in the core sample; the saturated hydrocarbon components in the chloroform bitumen A solution are extracted using a component separation method; the chloroform bitumen A solution includes saturated hydrocarbon components and aromatic hydrocarbon components;

[0032] Step 103: Quantitatively analyze the extracted saturated hydrocarbon components, determine the gamma cerane index (GI) and long-chain tricyclic terpenoid ratio (ETR) of the drilling core sample based on the analysis results, and calculate the biomarker marine transgression activity intensity index (BI) based on the gamma cerane index (GI) and long-chain tricyclic terpenoid ratio (ETR) of the drilling core sample.

[0033] Step 104: Perform major and trace element analysis on the drilling core sample to obtain the major and trace element analysis results. Based on the major and trace element analysis results, determine the content ratio of strontium to barium and magnesium to aluminum in the drilling core sample. Based on the content ratio of strontium to barium and magnesium to aluminum in the drilling core sample, calculate the trace element transgression activity intensity index EI.

[0034] Step 105: Characterize the intensity of ancient marine transgression activity based on the biota transgression activity intensity index BI and the elemental transgression activity intensity index EI.

[0035] Each step is explained in detail below.

[0036] In step 101, after ruling out the influence of salt rock weathering and hydrothermal activity on the salinity of the lake water in the target area through geological analysis, core samples from the well in the target area are collected.

[0037] In a specific embodiment, the changes in lake salinity are mainly caused by four factors, including strong evaporative climate, salt rock weathering (parent rock), strong hydrothermal activity, and marine transgression. First, through literature review and regional geological analysis, the influence of factors such as salt rock weathering and strong hydrothermal activity in the study area was excluded to ensure that the salinity changes only reflect the influence of marine transgression.

[0038] In step 102, the drilling core sample is processed using Soxhlet extraction to obtain a chloroform bitumen A solution. A component separation method is then used to extract saturated hydrocarbon components from the chloroform bitumen A solution. The chloroform bitumen A solution includes both saturated hydrocarbon components and aromatic hydrocarbon components. In step 103, the extracted saturated hydrocarbon components are quantitatively analyzed. Based on the analysis results, the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drilling core sample are determined. Based on the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drilling core sample, the biomarker transgression activity intensity index (BI) is calculated.

[0039] In one embodiment, quantitative analysis is performed on the extracted saturated hydrocarbon components, and the gamma acene index (GI) and long-chain tricyclic terpene ratio (ETR) of the drill core sample are determined based on the analysis results, including:

[0040] Gas chromatography and mass spectrometry experiments were performed on saturated hydrocarbon components, and quantitative analysis of saturated hydrocarbon components was carried out based on the experimental results.

[0041] The GI and ETR of the drill core samples were determined based on the analysis results.

[0042] In a specific embodiment, based on the saturated hydrocarbon chromatography and mass spectrometry results of the core samples from the target layer, the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR), reflecting the relative salinity of the lake water, are calculated, where the ETR index is C.28 Tricyclic terpenes and C 29 The sum of tricyclic terpenoid contents and C 28 Tricyclic terpenoids, C 29 The ratio of tricyclic terpenoids to trinorhopane, where GI is the ratio of gammacerane to C30 hopane. After normalization, these two parameters are added together to obtain the molecular salinity index. The sum of GI and ETR, representing the relatively low salinity in the target layer where no marine transgression has occurred, is used as the baseline value. The sum of GI and ETR values ​​at each sampling point in the target layer is then divided by the baseline value to obtain the biomarker marine transgression intensity index (BI), which reflects the magnitude of salinity changes at each sample point in the target layer.

[0043] In one embodiment, the marine transgression intensity index (BI) of the biomarker is calculated based on the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drill core sample, including:

[0044] The biomarker transgression intensity index (BI) is calculated based on the sum of the GI and ETR of the drill core samples and the sum of the preset baseline GI and ETR.

[0045] In one embodiment, the biomarker transgression activity intensity index (BI) is calculated based on the sum of the GI and ETR of the drill core sample and a preset baseline value of the sum of the GI and ETR, including:

[0046] Calculate BI using the following formula:

[0047] BI = (GI + ETR) 样品点 / (GI+ETR) 基准值

[0048] Among them, (GI+ETR) 样品点 This represents the sum of the GI and ETR of the drill core sample, (GI + ETR). 基准值 The baseline value for the sum of GI and ETR is the average value of a continuous low-value range (thickness generally greater than or equal to 2m) before the GI and ETR values ​​of the sample point increase significantly.

[0049] In step 104, major and trace element analysis is performed on the drilling core sample to obtain the major and trace element analysis results. Based on the major and trace element analysis results, the ratio of strontium to barium and the ratio of magnesium to aluminum in the drilling core sample are determined. Based on the ratio of strontium to barium and the ratio of magnesium to aluminum in the drilling core sample, the trace element transgression activity intensity index EI is calculated.

[0050] In one embodiment, the trace element transgression intensity index EI is calculated based on the ratio of strontium to barium and the ratio of magnesium to aluminum in the drill core sample, including:

[0051] The trace element transgression activity intensity index EI is calculated based on the sum of the ratios of strontium and barium content to the ratios of magnesium and aluminum content in the drill core samples, and the sum of the ratios of the content of preset reference elements.

[0052] In a specific embodiment, the ratio of strontium to barium (Sr / Ba) and the ratio of magnesium to aluminum (Mg / Al) in the target layer are calculated and normalized. Then, the normalized results are added together, and the comprehensive value of elements with relatively low salinity in the target layer where no marine transgression has occurred is used as the benchmark value. The intensity index of marine transgression activity reflecting the magnitude of salinity change at each sample point in the target layer is calculated.

[0053] In one embodiment, the trace element transgression activity intensity index EI is calculated based on the sum of the ratios of strontium and barium content to the ratios of magnesium and aluminum content in the drill core sample, and the sum of the ratios of preset benchmark elements. This includes:

[0054] Calculate EI using the following formula:

[0055] EI = (Sr / Ba + Mg / Al) 样品点 / (Sr / Ba+Mg / Al) 基准值

[0056] Among them, (Sr / Ba+Mg / Al) 样品点 This represents the sum of the ratios of strontium / barium and magnesium / aluminum content in the drill core sample, (Sr / Ba + Mg / Al). 基准值 The sum of the preset reference element content ratios is the average value of the continuous low value range (thickness generally greater than or equal to 2m) before the Sr / Ba and Mg / Al values ​​of the sample point increase significantly.

[0057] In step 105, the intensity of ancient marine transgression is characterized by the biomarker transgression intensity index BI and the elemental transgression intensity index EI.

[0058] In a specific embodiment, layers with both EI and BI greater than 1.2 are marked as representing persistent marine transgressions with strong intensity; the higher the EI and BI values, the stronger the transgression. Conversely, when one value in a layer is greater than 1.2 while the other is not entirely greater than 1.2 or fluctuates around 1.2, it represents intermittent marine transgressions; the higher the value of BI, the stronger the transgression. If one value of EI and BI in a layer is greater than 1.2 while the other is less than 1.2, or both values ​​are less than 1.2, the lake is less affected by marine transgression or no transgression has occurred. By using the dual indicators BI and EI to output continuous numerical values ​​of marine transgression intensity, the technical problem of existing technologies that can only represent marine transgression intensity with a binary result of "strong / weak" and cannot reflect the gradual change in intensity is solved, facilitating longitudinal comparison of stratigraphic salinity changes.

[0059] The following example uses the intensity index of marine transgression activity at the bottom of the Nenjiang Formation in a certain basin:

[0060] Figure 2 To illustrate the trend charts of the Climate Change Index (CIA) and Gamma-cerane Index (GI) of the Nenjiang Formation in Well GY3HC of a certain basin in this invention, 53 collected samples were pulverized to 200 mesh. The powdered samples were wrapped in filter paper into cylindrical shapes and subjected to Soxhlet extraction with chloroform for 72 hours. After the extract was precipitated with n-hexane to obtain asphaltenes, saturated hydrocarbons, aromatic hydrocarbons, and non-hydrocarbons were separated sequentially by column chromatography. Gas chromatography and mass spectrometry experiments were then performed on the saturated hydrocarbons. After solvent evaporation and drying, major and trace element analysis was conducted.

[0061] EI and BI were calculated for 53 sample points at the bottom of the Nenjiang Formation in well GY3HC, and a comprehensive bar chart reflecting various indices of marine transgression intensity was established. Figure 3 This is a schematic diagram illustrating the intensity of marine transgression in the Nenjiang Formation of a basin, as described in an embodiment of the present invention. TOC represents organic carbon content; light blue indicates continuous marine transgression, and yellow indicates intermittent marine transgression. The EI and BI values ​​at 1705-1723m and 1810-1820m are both greater than 1.2, with the majority between 1.5 and 2, indicating continuous marine transgression and relatively high intensity. In the 1760-1795m stratigraphic section, the BI value is generally greater than 1.2, reaching around 2, and the EI value is partially greater than 1.2, ranging from 2 to 4, indicating intermittent marine transgression. That is, when both parameter values ​​are greater than 1.2, it is a marine transgression period. Only when the element index is greater than 1.2 and the biometric index is less than 1.2 is it a marine transgression intermittent period. The intensity of the marine transgression period is generally large and shows an upward weakening trend. Therefore, the Nenjiang section generally develops three phases of marine transgression. The first and third phases are continuous marine transgressions with moderate intensity. The second phase is an intermittent marine transgression with relatively large intensity and downward weakening trend. The first phase has a short duration, while the second and third phases have a longer duration.

[0062] In summary, this invention can be used to quantitatively characterize the intensity of ancient marine transgression at the bottom of the Nenjiang Formation in the Songliao Basin, obtaining the timing and intensity of the transgression during this period, as well as the type characteristics of the transgression. This provides technical support for the study of the intrinsic mechanism by which marine transgression leads to the enrichment of organic matter in the Nenjiang Formation.

[0063] This invention also provides an apparatus for quantitatively characterizing the intensity of ancient marine transgression, as described in the following embodiments. Since the principle underlying this apparatus is similar to the method for quantitatively characterizing the intensity of ancient marine transgression, the implementation of this apparatus can refer to the implementation of the method for quantitatively characterizing the intensity of ancient marine transgression, and will not be repeated here.

[0064] Figure 4 This is a schematic diagram of a device for quantitatively characterizing the intensity of ancient marine transgression activities in an embodiment of the present invention. The device includes:

[0065] The drilling core sample acquisition module 401 is used to collect drilling core samples from the target area after geological analysis has ruled out the influence of salt rock weathering and hydrothermal activity on the salinity of lake water in the target area.

[0066] The saturated hydrocarbon component extraction module 402 is used to process drilling core samples using Soxhlet extraction to obtain chloroform bitumen A solution in the core samples; and to extract saturated hydrocarbon components from the chloroform bitumen A solution using a component separation method; the chloroform bitumen A solution includes saturated hydrocarbon components and aromatic hydrocarbon components;

[0067] The biomarker transgression activity intensity index calculation module 403 is used to perform quantitative analysis on the extracted saturated hydrocarbon components, determine the gamma cerane index GI and the long-chain tricyclic terpene ratio ETR of the drilling core sample based on the analysis results, and calculate the biomarker transgression activity intensity index BI based on the gamma cerane index GI and the long-chain tricyclic terpene ratio ETR of the drilling core sample.

[0068] The trace element transgression activity intensity index calculation module 404 is used to perform major and trace element analysis on drilling core samples, obtain the major and trace element analysis results, determine the content ratio of strontium to barium and magnesium to aluminum in the drilling core samples based on the major and trace element analysis results, and calculate the trace element transgression activity intensity index EI based on the content ratio of strontium to barium and magnesium to aluminum in the drilling core samples.

[0069] The paleomarine transgression intensity characterization module 405 is used to characterize the intensity of paleomarine transgression based on the biota transgression intensity index BI and the element transgression intensity index EI.

[0070] In one embodiment, the biomarker marine transgression activity intensity index calculation module 403 is further used for:

[0071] Gas chromatography and mass spectrometry experiments were performed on saturated hydrocarbon components, and quantitative analysis of saturated hydrocarbon components was carried out based on the experimental results.

[0072] The GI and ETR of the drill core samples were determined based on the analysis results.

[0073] In one embodiment, the biomarker marine transgression activity intensity index calculation module 403 is specifically used for:

[0074] The biomarker transgression intensity index (BI) is calculated based on the sum of the GI and ETR of the drill core samples and the sum of the preset baseline GI and ETR.

[0075] In one embodiment, the biomarker marine transgression activity intensity index calculation module 403 is specifically used for:

[0076] Calculate BI using the following formula:

[0077] BI = (GI + ETR) 样品点 / (GI+ETR) 基准值

[0078] Among them, (GI+ETR) 样品点 This represents the sum of the GI and ETR of the drill core sample, (GI + ETR). 基准值 This is the baseline value for the sum of the preset GI and ETR.

[0079] In one embodiment, the trace element marine transgression activity intensity index calculation module 404 is specifically used for:

[0080] The trace element transgression activity intensity index EI is calculated based on the sum of the ratios of strontium and barium content to the ratios of magnesium and aluminum content in the drill core samples, and the sum of the ratios of the content of preset reference elements.

[0081] In one embodiment, the trace element marine transgression activity intensity index calculation module 404 is specifically used for:

[0082] Calculate EI using the following formula:

[0083] EI = (Sr / Ba + Mg / Al) 样品点 / (Sr / Ba+Mg / Al) 基准值

[0084] Among them, (Sr / Ba+Mg / Al) 样品点 This represents the sum of the ratios of strontium / barium and magnesium / aluminum content in the drill core sample, (Sr / Ba + Mg / Al). 基准值 This is the sum of the preset baseline element content ratios.

[0085] This invention also provides a computer device. Figure 5 This is a schematic diagram of a computer device in an embodiment of the present invention. The computer device 500 includes a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and executable on the processor 520. When the processor 520 executes the computer program 530, it implements the above-mentioned method for quantitatively characterizing the intensity of ancient marine transgression activities.

[0086] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for quantitatively characterizing the intensity of ancient marine transgression.

[0087] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for quantitatively characterizing the intensity of ancient marine transgression activities.

[0088] In this embodiment of the invention, after ruling out the influence of salt rock weathering and hydrothermal activity on the salinity of the lake water in the target area through geological analysis, borehole core samples are collected from the target area. The borehole core samples are processed using Soxhlet extraction to obtain a chloroform bitumen A solution. Saturated hydrocarbon components are extracted from the chloroform bitumen A solution using a component separation method. The chloroform bitumen A solution includes saturated hydrocarbon components and aromatic hydrocarbon components. Quantitative analysis is performed on the extracted saturated hydrocarbon components, and the gamma acene index (GI) and long-chain tricyclic terpene ratio (ETR) of the borehole core samples are determined based on the analysis results. The gamma-cerane index (GI) and the long-chain tricyclic terpene ratio (ETR) are used to calculate the biomarker transgression activity intensity index (BI). Major and trace element analysis is performed on the drill core samples to obtain the results. Based on these results, the ratios of strontium to barium and magnesium to aluminum in the drill core samples are determined. The trace element transgression activity intensity index (EI) is then calculated based on these ratios. The intensity of paleomarginal transgression activity is characterized by the biomarker transgression activity intensity index (BI) and the elemental transgression activity intensity index (EI). In this process, the present invention actively screens out major interfering sources such as salt rock weathering and hydrothermal activity, ensuring that subsequent salinity changes are only related to the intensity of transgression activity, thus avoiding the influence of other factors. By using the biomarker transgression activity intensity index and the elemental transgression activity intensity index, the intensity of transgression activity is transformed from a qualitative description into a quantifiable indicator, solving the problem that existing technologies cannot quantitatively characterize the intensity of transgression activity.

[0089] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied 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.

[0090] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0092] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0093] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for quantitatively characterizing the intensity of ancient marine transgression, characterized in that, include: After ruling out the influence of salt rock weathering and hydrothermal activity on the salinity of the lake water in the target area through geological analysis, core samples from the target area were collected. The drilling core samples were processed using Soxhlet extraction to obtain a chloroform bitumen A solution from the core samples; saturated hydrocarbon components were extracted from the chloroform bitumen A solution using a component separation method. The chloroform pitch A solution contains saturated hydrocarbon components and aromatic hydrocarbon components; Quantitative analysis was performed on the extracted saturated hydrocarbon components. Based on the analysis results, the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drilling core samples were determined. Based on the gammacerane index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drilling core samples, the marine transgression intensity index (BI) of the biomarker was calculated. Major and trace element analysis was performed on the drilling core samples to obtain the results. Based on the results, the ratios of strontium to barium and magnesium to aluminum in the drilling core samples were determined. Based on the ratios of strontium to barium and magnesium to aluminum in the drilling core samples, the trace element transgression activity intensity index EI was calculated. The intensity of ancient marine transgression is characterized by the biometric transgression intensity index BI and the elemental transgression intensity index EI.

2. The method as described in claim 1, characterized in that, Quantitative analysis was performed on the extracted saturated hydrocarbon components. Based on the analysis results, the gamma acene index (GI) and the long-chain tricyclic terpene ratio (ETR) of the drill core samples were determined, including: Gas chromatography and mass spectrometry experiments were performed on saturated hydrocarbon components, and quantitative analysis of saturated hydrocarbon components was carried out based on the experimental results. The GI and ETR of the drill core samples were determined based on the analysis results.

3. The method as described in claim 1, characterized in that, Based on the gammacerane index (GI) and long-chain tricyclic terpenoid ratio (ETR) of the drill core samples, the biomarker transgression intensity index (BI) was calculated, including: The biomarker transgression intensity index (BI) is calculated based on the sum of the GI and ETR of the drill core samples and the sum of the preset baseline GI and ETR.

4. The method as described in claim 3, characterized in that, Based on the sum of GI and ETR of the drill core samples and a pre-set baseline value for the sum of GI and ETR, the biomarker transgression activity intensity index BI is calculated, including: Calculate BI using the following formula: BI=(GI+ETR) 样品点 / (GI+ETR) 基准值 Among them, (GI+ETR) 样品点 This represents the sum of the GI and ETR of the drill core sample, (GI + ETR). 基准值 This is the baseline value for the sum of the preset GI and ETR.

5. The method as described in claim 1, characterized in that, Based on the ratios of strontium to barium and magnesium to aluminum in the drill core samples, the trace element transgression intensity index (EI) is calculated, including: The trace element transgression activity intensity index EI is calculated based on the sum of the ratios of strontium and barium content to the ratios of magnesium and aluminum content in the drill core samples, and the sum of the ratios of the content of preset reference elements.

6. The method as described in claim 5, characterized in that, The trace element transgression activity intensity index (EI) is calculated based on the sum of the ratios of strontium and barium content to the ratios of magnesium and aluminum content in the drill core samples, and the sum of the ratios of pre-set reference elements. This index includes: Calculate EI using the following formula: EI=(Sr / Ba+Mg / Al) 样品点 / (Sr / Ba+Mg / Al) 基准值 Among them, (Sr / Ba+Mg / Al) 样品点 This represents the sum of the ratios of strontium / barium and magnesium / aluminum content in the drill core sample, (Sr / Ba + Mg / Al). 基准值 This is the sum of the preset baseline element content ratios.

7. A device for quantitatively characterizing the intensity of ancient marine transgression activities, characterized in that, include: The drilling core sample collection module is used to collect drilling core samples from the target area after geological analysis has ruled out the influence of salt rock weathering and hydrothermal activity on the salinity of lake water in the target area. The saturated hydrocarbon component extraction module is used to process drilling core samples using Soxhlet extraction to obtain chloroform bitumen A solution from the core samples; and to extract saturated hydrocarbon components from the chloroform bitumen A solution using a component separation method. The chloroform pitch A solution contains saturated hydrocarbon components and aromatic hydrocarbon components; The biomarker transgression activity intensity index calculation module is used to perform quantitative analysis on the extracted saturated hydrocarbon components. Based on the analysis results, the gammacerane index (GI) and long-chain tricyclic terpene ratio (ETR) of the drilling core sample are determined. Based on the gammacerane index (GI) and long-chain tricyclic terpene ratio (ETR) of the drilling core sample, the biomarker transgression activity intensity index (BI) is calculated. The trace element transgression activity intensity index calculation module is used to perform major and trace element analysis on drilling core samples, obtain the major and trace element analysis results, determine the content ratio of strontium to barium and magnesium to aluminum in the drilling core samples based on the major and trace element analysis results, and calculate the trace element transgression activity intensity index EI based on the content ratio of strontium to barium and magnesium to aluminum in the drilling core samples. The paleomarine transgression intensity characterization module is used to characterize the intensity of paleomarine transgression based on the biota transgression intensity index BI and the element transgression intensity index EI.

8. The apparatus as claimed in claim 7, characterized in that, The module for calculating the intensity index of marine transgression activity of biological specimens is also used for: Gas chromatography and mass spectrometry experiments were performed on saturated hydrocarbon components, and quantitative analysis of saturated hydrocarbon components was carried out based on the experimental results. The GI and ETR of the drill core samples were determined based on the analysis results.

9. The apparatus as claimed in claim 7, characterized in that, The biomarker marine transgression activity intensity index calculation module is specifically used for: The biomarker transgression intensity index (BI) is calculated based on the sum of the GI and ETR of the drill core samples and the sum of the preset baseline GI and ETR.

10. The apparatus as claimed in claim 9, characterized in that, The biomarker marine transgression activity intensity index calculation module is specifically used for: Calculate BI using the following formula: BI=(GI+ETR) 样品点 / (GI+ETR) 基准值 Among them, (GI+ETR) 样品点 This represents the sum of the GI and ETR of the drill core sample, (GI + ETR). 基准值 This is the baseline value for the sum of the preset GI and ETR.

11. The apparatus as claimed in claim 7, characterized in that, The trace element marine transgression activity intensity index calculation module is specifically used for: The trace element transgression activity intensity index EI is calculated based on the sum of the ratios of strontium and barium content to the ratios of magnesium and aluminum content in the drill core samples, and the sum of the ratios of the content of preset reference elements.

12. The apparatus as claimed in claim 11, characterized in that, The trace element marine transgression activity intensity index calculation module is specifically used for: Calculate EI using the following formula: EI=(Sr / Ba+Mg / Al) 样品点 / (Sr / Ba+Mg / Al) 基准值 Among them, (Sr / Ba+Mg / Al) 样品点 This represents the sum of the ratios of strontium / barium and magnesium / aluminum content in the drill core sample, (Sr / Ba + Mg / Al). 基准值 This is the sum of the preset baseline element content ratios.

13. A computer 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 computer program, it implements the method of any one of claims 1 to 6.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

15. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

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