A method and device for comparing formations based on spectrum logging

Abstract

The present invention provides a method and device for stratigraphic division and comparison based on spectral logging, the method comprising: dividing the stratigraphic layers through the conventional logging curves obtained to determine the initial three-level stratigraphic sequence of the stratigraphic layers; calculating the carbonate content curve of the single well according to the obtained spectral logging curves and the measured carbonate content; dividing the sand layer groups on the three-level stratigraphic sequence through the carbonate content curve of the single well; and conducting the whole-area stratification and comparison of the single-well sand layer groups in the whole area according to the divided sand layer groups. The present application utilizes the principles of sequence stratigraphy, and on the basis of the three-level stratigraphic division, examines the core observation data and calculates the carbonate content through the spectral logging curves. Based on the principle that the salt of the lake water is consistent at equal water depths when there is no fresh water injection or when fresh water is steadily injected, and that the trend of the salinity of the lake water changing over time is consistent, a fine stratigraphic division is carried out to obtain more accurate and fine stratigraphic division data.

Description

Technical Field

[0001] The present application relates to a stratum comparison technology in petroleum exploration, and in particular to a stratum division and comparison method and device based on energy spectrum logging. Background Art

[0002] The study of stratigraphic division and comparison has begun since the advent of sequence stratigraphy, usually using conventional GR, SP and resistivity curves to conduct sequence division and comparison.

[0003] Conventional stratigraphic division and comparison is carried out step by step from coarse to fine under the guidance of sequence stratigraphy, based on conventional logging curves, reference cores, mud logging and seismic, etc., with regional isochronal interfaces as reference surfaces. This method has obvious advantages in the division of third-level and above sequences or in the comparison of large-area stratigraphy. On this basis, many people in the industry have realized automatic stratigraphic division and comparison using wavelet algorithms and other technologies, which has played an important role in the early and middle exploration of oil and gas. However, in the middle and late stages of oil exploration, when more detailed stratigraphic comparison is needed, this method is slightly insufficient, especially in the comparison of mixed lake facies stratigraphy with a high carbonate content. This division and comparison method cannot effectively reflect the changes in lake salinity. Summary of the invention

[0004] The present application provides a stratum division and comparison method and device based on energy spectrum logging, so as to at least solve the problem that the current stratum division and comparison method is not applicable to the comparison of strata with high carbonate content.

[0005] According to one aspect of the present application, a stratigraphic division and comparison method based on spectral logging is provided, comprising:

[0006] The strata are divided by the conventional logging curves obtained to determine the initial three-level sequence of the strata;

[0007] Calculate the single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content;

[0008] The sand layers are divided into groups in the third-order sequence by the carbonate content curve of a single well;

[0009] According to the divided sand layer groups, the whole area is organized and the division and comparison of the sand layer groups of single wells in the whole area are completed.

[0010] In one embodiment, calculating a single well carbonate content curve based on the acquired spectral logging curve and the measured carbonate content includes:

[0011] Carbonate content is obtained from cores from conventional well logs;

[0012] The carbonate content curve of a single well is obtained by fitting the carbonate content using the energy spectrum logging curve.

[0013] In one embodiment, the sand layer groups are divided in the third-order sequence according to the carbonate content curve of a single well, including:

[0014] The initial third-order sequence is adjusted using the single-well carbonate content curve and conventional logging curve to obtain the adjusted third-order sequence interface;

[0015] The adjusted third-order sequence interface is divided into sand layer groups and the carbonate content curve corresponding to each sand layer group is determined;

[0016] The division of sand layer groups is completed by creating signs for dividing sand layer groups according to the carbonate content curve corresponding to each sand layer group.

[0017] In one embodiment, the whole area is stratified according to the divided sand layer groups and the division and comparison of the single well sand layer groups in the whole area are completed, including:

[0018] Compare the profiles of sand layers in the whole area and adjust the division of sand layers in combination with fine well-seismic calibration;

[0019] Based on the adjusted sand layer group division, the single well sand layer group division and comparison in the entire area are completed.

[0020] According to another aspect of the present application, a formation division and comparison device based on spectral logging is also provided, comprising:

[0021] An initial third-level sequence determination unit is used to divide the strata by obtaining conventional well logging curves and determine the initial third-level sequence of the strata;

[0022] A single well carbonate content curve acquisition unit is used to calculate a single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content;

[0023] Sand layer group division unit, used to divide sand layer groups on the third-order sequence according to the carbonate content curve of a single well;

[0024] The division and comparison unit of the sand layer groups in the whole area is used to carry out the whole area system according to the divided sand layer groups and complete the division and comparison of the sand layer groups of single wells in the whole area.

[0025] In one embodiment, the single well carbonate content curve acquisition unit includes:

[0026] A carbonate content acquisition module is used to obtain carbonate content from cores in conventional well logging curves;

[0027] The curve fitting module is used to fit the carbonate content using the energy spectrum logging curve to obtain the carbonate content curve of a single well.

[0028] In one embodiment, the sand layer group division unit includes:

[0029] An adjustment module is used to adjust the initial third-level sequence using a single well carbonate content curve and a conventional logging curve to obtain an adjusted third-level sequence interface;

[0030] A division module is used to divide the adjusted third-level sequence interface into sand layer groups and determine the carbonate content curve corresponding to each sand layer group;

[0031] The marking module is used to create markings for dividing sand layer groups according to the carbonate content curve corresponding to each sand layer group to complete the division of the sand layer groups.

[0032] In one embodiment, the division and comparison unit of the whole area sand layer group includes:

[0033] Fine-tuning module, used to compare the profiles of sand groups in the whole area and adjust the division of sand groups in combination with fine well-seismic calibration;

[0034] The division and comparison module is used to complete the division and comparison of the sand layer groups of single wells in the whole area according to the adjusted division of the sand layer groups.

[0035] This application utilizes the principles of sequence stratigraphy. On the basis of the three-level sequence division, the core observation data is examined through the spectral logging curve and the carbonate content is calculated. Based on the principle that the salt of lake water is consistent at equal water depths when there is no fresh water injection or stable fresh water injection and that the trend of lake water salinity change over time is consistent, a detailed stratigraphic division is carried out to obtain more accurate and detailed stratigraphic division data. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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 only 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.

[0037] Figure 1 A flow chart of a stratigraphic division and comparison method based on spectral logging provided in this application.

[0038] Figure 2 This is a flow chart for calculating the carbonate content curve of a single well in an embodiment of the present application.

[0039] Figure 3 This is a flow chart for dividing sand layer groups on the initial tertiary sequence in an embodiment of the present application.

[0040] Figure 4 This is a flow chart for comparing the division of sand layer groups of single wells in the entire area in the embodiments of the present application.

[0041] Figure 5A structural block diagram of a formation division and comparison device based on spectral logging provided in this application.

[0042] Figure 6 This is a structural block diagram of a single well carbonate content curve acquisition unit in an embodiment of the present application.

[0043] Figure 7 It is a structural block diagram of the sand layer group division unit in the embodiment of the present application.

[0044] Figure 8 This is a structural block diagram of the division and comparison unit of the sand layer group in the whole area in the embodiment of the present application.

[0045] Fig. 9 This is a carbonate content identification chart and a carbonate content calculation comparison chart in the embodiments of this application.

[0046] Fig.10 This is a comparison diagram of the stratigraphic division in the embodiment of this application.

[0047] Fig.11 This is a specific implementation of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments 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.

[0049] Currently, in the field of oil exploration, wavelet algorithms and other technologies are used to achieve automatic stratigraphic division and comparison, which plays an important role in early and mid-stage oil and gas exploration. However, in the middle and late stages of oil exploration, when more detailed stratigraphic comparison is required, this method is slightly insufficient, especially in the comparison of mixed lacustrine strata with a high carbonate content. Based on this, this application provides a stratigraphic division and comparison method based on spectral logging, such as Figure 1 As shown, including:

[0050] S101: Divide the strata by obtaining conventional logging curves to determine the initial three-level sequence of the strata.

[0051] In a specific embodiment, the third-level sequence of the stratum is preliminarily determined by performing well logging, high-resolution sequence division and comparison of the stratum and well-seismic calibration.

[0052] S102: Calculate a single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content.

[0053] In one embodiment, a single well carbonate content curve is calculated based on the acquired spectral logging curve and the measured carbonate content, such as Figure 2 As shown, including:

[0054] S201: Obtain carbonate content from cores in conventional logging curves.

[0055] S202: Fitting the carbonate content using the spectral logging curve to obtain a single well carbonate content curve.

[0056] In a specific embodiment, if Fig. 9 As shown, by analyzing the core in the conventional logging curve, the carbonate content in the formation is determined, and a carbonate content identification plate is generated. Then, the carbonate content of the formation is fitted using the pre-obtained energy spectrum logging curve to obtain a carbonate content curve, thereby calculating the carbonate content curve of a single well in the entire area.

[0057] S103: Divide the sand layer groups on the initial third-order sequence by the single-well carbonate content curve.

[0058] In one embodiment, the sand layers are divided into groups based on the initial third-order sequence by the carbonate content curve of a single well, such as Figure 3 As shown, including:

[0059] S301: Using the single well carbonate content curve and conventional logging curve, the initial third-order sequence is adjusted to obtain the adjusted third-order sequence interface.

[0060] S302: Divide the adjusted third-order sequence interface into sand layer groups and determine the carbonate content curve corresponding to each sand layer group.

[0061] S303: Creating a sign for dividing the sand layer groups according to the carbonate content curve corresponding to each sand layer group to complete the division of the sand layer groups.

[0062] In a specific embodiment, in a typical single well, the carbonate content curve of the single well obtained in S201-S202 is used, combined with conventional logging curves (such as GR and RT curves) to divide the strata into three-level sequences. The purpose of this step is to adjust the interface of the initial three-level sequence divided by conventional logging curves, and lay the foundation for the subsequent division of sand layer groups. Then the sand layer group division and comparison link is carried out. According to the divided three-level sequence, the typical characteristics of the carbonate content curve and other curves corresponding to each sand layer group are clarified, and the standards and signs for the division of sand layer groups are established. Since the changes in lake water salinity are basically consistent in a certain geological history period, the lateral comparison of carbonate content curves in the entire work area (the entire area) can complete the stratification of sand layer groups in other single wells in the entire work area.

[0063] S104: According to the divided sand layer groups, the whole area is organized and the division and comparison of the sand layer groups of single wells in the whole area are completed.

[0064] In one embodiment, the whole area is stratified according to the divided sand layer groups and the division and comparison of the single well sand layer groups in the whole area are completed, such as Figure 4 As shown, including:

[0065] S401: Compare the profiles of the sand layers in the whole area and adjust the division of the sand layers in combination with fine well-seismic calibration.

[0066] S402: Complete the comparison of the sand layer group division of the single well in the whole area according to the adjusted sand layer group division.

[0067] In a specific embodiment, after completing the stratification of the sand layer groups of single wells in the entire work area, the multi-well skeleton method is used to compare the stratified profiles of the sand layer groups of single wells, and then combined with fine well seismic calibration, the sand layer group division obtained in S301-S303 is fine-tuned, and the whole area is unified, finally completing the sand layer group division and comparison work of single wells in the whole area.

[0068] Based on the same inventive concept, the embodiments of the present application also provide a stratigraphic division and comparison device based on spectral logging, which can be used to implement the method described in the above embodiments, as described in the following embodiments. Since the principle of solving the problem by the stratigraphic division and comparison device based on spectral logging is similar to that of the stratigraphic division and comparison method based on spectral logging, the implementation of the stratigraphic division and comparison device based on spectral logging can refer to the implementation of the stratigraphic division and comparison method based on spectral logging, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements 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.

[0069] The present application also provides a formation division and comparison device based on energy spectrum logging, such as Figure 5 As shown, including:

[0070] The initial third-level sequence determination unit 501 is used to divide the strata by obtaining conventional well logging curves to determine the initial third-level sequence of the strata;

[0071] A single well carbonate content curve acquisition unit 502 is used to calculate a single well carbonate content curve according to the acquired energy spectrum logging curve and the measured carbonate content;

[0072] The sand layer group division unit 503 is used to divide the sand layer group on the third-level sequence according to the single well carbonate content curve;

[0073] The whole-area sand layer group division and comparison unit 504 is used to perform whole-area system layer division and comparison of single-well sand layer groups in the whole area according to the divided sand layer groups.

[0074] In one embodiment, if Figure 6 As shown, the single well carbonate content curve acquisition unit 502 includes:

[0075] The carbonate content acquisition module 601 is used to obtain the carbonate content through the core in the conventional logging curve;

[0076] The curve fitting module 602 is used to fit the carbonate content using the spectral logging curve to obtain a single well carbonate content curve.

[0077] In one embodiment, if Figure 7 As shown, the sand layer group division unit 503 includes:

[0078] An adjustment module 701 is used to adjust the initial third-level sequence using a single well carbonate content curve and a conventional logging curve to obtain an adjusted third-level sequence interface;

[0079] A division module 702 is used to divide the adjusted third-level sequence interface into sand layer groups and determine the carbonate content curve corresponding to each sand layer group;

[0080] The marking module 703 is used to create a marking for dividing the sand layer groups according to the carbonate content curve corresponding to each sand layer group to complete the division of the sand layer groups.

[0081] In one embodiment, if Figure 8 As shown, the whole-area sand layer group division and comparison unit 504 includes:

[0082] The fine-tuning module 801 is used to compare the profiles of the sand layer groups in the whole area and adjust the division of the sand layer groups in combination with fine well-seismic calibration;

[0083] The division and comparison module 802 is used to complete the division and comparison of the sand layer groups of the single wells in the whole area according to the adjusted division of the sand layer groups.

[0084] In the actual exploration process, taking a certain study area in the Qaidam Basin as an example, using the conventional stratigraphic division and comparison method, some single wells do not match the carbonate content curve, and the lateral stratigraphic thickness changes are obviously unreasonable. The stratigraphic division and comparison method based on spectral logging provided by the present application can effectively solve the shortcomings of the GR curve (conventional logging curve) that the changes are not obvious, and accurately divide the interface of the sand layer group, such as Fig.10 As shown, the strata divided by the method provided in this application have more reasonable lateral stratum thickness variations, with an overall adjustment range of less than 100 meters, and more reasonable seismic calibration, which lays a good foundation for reserve evaluation in the strata.

[0085] Compared with the existing technology (which only uses conventional logging curves to divide strata), the stratigraphic division and comparison method provided in the present application takes into account both the vertical changes in lake water salinity and the lateral changes in sedimentary phases. Therefore, it can improve the accuracy of stratigraphic division and comparison in strata with a high carbonate rock content, and is more suitable for strata such as saline lake basins than the existing technology.

[0086] 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.

[0087] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0090] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

[0091] The embodiments of the present application also provide a specific implementation of an electronic device that can implement all the steps in the method in the above embodiments, see Fig.11 , the electronic device specifically includes the following contents:

[0092] Processor 1101, memory 1102, communication interface 1103, bus 1104 and non-volatile memory 1105;

[0093] The processor 1101, memory 1102, and communication interface 1103 communicate with each other via the bus 1104;

[0094] The processor 1101 is used to call the computer program in the memory 1102 and the non-volatile memory 1105. When the processor executes the computer program, all the steps in the method in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0095] The strata are divided by the conventional logging curves obtained to determine the initial three-level sequence of the strata;

[0096] Calculate the single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content;

[0097] The sand layers are divided into groups in the third-order sequence by the carbonate content curve of a single well;

[0098] According to the divided sand layer groups, the whole area is organized and the division and comparison of the sand layer groups of single wells in the whole area are completed.

[0099] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method in the above embodiments. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the method in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0100] The strata are divided by the conventional logging curves obtained to determine the initial three-level sequence of the strata;

[0101] Calculate the single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content;

[0102] The sand layers are divided into groups in the third-order sequence by the carbonate content curve of a single well;

[0103] According to the divided sand layer groups, the whole area is organized and the division and comparison of the sand layer groups of single wells in the whole area are completed.

[0104] 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. Although the embodiment of this specification provides the method operation steps described in the embodiment or flow chart, more or less operation steps can be included based on conventional or non-creative means. The order of steps listed in the embodiment is only one way of executing the order of many steps, and does not represent the only execution order. When the device or terminal product in practice is executed, it can be executed in sequence or in parallel according to the method shown in the embodiment or the accompanying drawings (for example, a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment). The term "include", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such a process, method, product or device. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or device including the elements. For the convenience of description, the above device is described by dividing it into various modules according to its functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same one 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, such as 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 coupling or direct coupling or communication connection between each other 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. The present invention is described with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the process and / or box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0105] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may be in the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the embodiments of this specification may be in 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 codes. 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 refer to the partial description of the method embodiment. In the description of this specification, the description of the reference term "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.

[0106] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other. The above is only an embodiment of the embodiment of this specification and is not intended to limit the embodiment of this specification. For those skilled in the art, the embodiment of this specification may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiment of this specification shall be included in the scope of the claims of the embodiment of this specification.

Claims

1. A stratigraphic division and comparison method based on spectral logging, characterized in that: include: The strata are divided by the conventional logging curves obtained to determine the initial three-level sequence of the strata; Calculate the single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content; Dividing sand layers into groups on the initial third-order sequence by the single-well carbonate content curve; According to the divided sand layer groups, the whole area is organized and the single well sand layer group division and comparison of the whole area are completed; The method of calculating the single well carbonate content curve based on the acquired spectral logging curve and the measured carbonate content includes: Obtaining carbonate content through the core in the conventional well logging curve; The single well carbonate content curve is obtained by fitting the carbonate content using the energy spectrum logging curve; specifically, the carbonate content in the formation is determined by analyzing the core in the conventional logging curve, and a carbonate content identification plate is generated; the carbonate content of the formation is fit based on the pre-obtained energy spectrum logging curve to obtain the carbonate content curve.

2. The stratigraphic division and comparison method based on spectral logging according to claim 1 is characterized in that: The dividing of sand layers on the initial third-level sequence by the single-well carbonate content curve comprises: Using the single well carbonate content curve and the conventional logging curve, the initial third-order sequence is adjusted to obtain an adjusted third-order sequence interface; The adjusted third-order sequence interface is divided into sand layer groups and the carbonate content curve corresponding to each sand layer group is determined; The division of sand layer groups is completed by creating signs for dividing sand layer groups according to the carbonate content curve corresponding to each sand layer group.

3. The stratigraphic division and comparison method based on spectral logging according to claim 1 is characterized in that: The method of performing the whole-area system layering and completing the division and comparison of the single-well sand layer groups in the whole area according to the divided sand layer groups includes: Compare the profiles of sand layers in the whole area and adjust the division of sand layers in combination with fine well-seismic calibration; Based on the adjusted sand layer group division, the single well sand layer group division and comparison in the entire area are completed.

4. A stratigraphic division and comparison device based on spectral logging, characterized in that: include: An initial third-level sequence determination unit is used to divide the strata by obtaining conventional well logging curves and determine the initial third-level sequence of the strata; A single well carbonate content curve acquisition unit is used to calculate a single well carbonate content curve based on the acquired energy spectrum logging curve and the measured carbonate content; A sand layer group division unit, used for dividing the sand layer group on the initial third-level sequence according to the single well carbonate content curve; The division and comparison unit of the sand layer group in the whole area is used to carry out the whole area system layer and complete the division and comparison of the sand layer group of the single well in the whole area according to the divided sand layer group; The single well carbonate content curve acquisition unit comprises: A carbonate content acquisition module, used to obtain carbonate content through the core in the conventional logging curve; The curve fitting module is used to obtain the single well carbonate content curve by fitting the carbonate content with the energy spectrum logging curve; specifically, the carbonate content in the formation is determined by analyzing the core in the conventional logging curve, and a carbonate content identification plate is generated; the carbonate content of the formation is summarized based on the energy spectrum logging curve obtained in advance to obtain the carbonate content curve.

5. The stratum division and comparison device based on spectrum logging according to claim 4 is characterized in that: The sand layer group division unit comprises: An adjustment module, used for adjusting the initial third-level sequence using the single-well carbonate content curve and the conventional logging curve to obtain an adjusted third-level sequence interface; A division module is used to divide the adjusted third-level sequence interface into sand layer groups and determine the carbonate content curve corresponding to each sand layer group; The marking module is used to create markings for dividing sand layer groups according to the carbonate content curve corresponding to each sand layer group to complete the division of the sand layer groups.

6. The stratum division and comparison device based on spectrum logging according to claim 4 is characterized in that: The division and comparison units of the sand layer groups in the whole area include: Fine-tuning module, used to compare the profiles of sand groups in the whole area and adjust the division of sand groups in combination with fine well-seismic calibration; The division and comparison module is used to complete the division and comparison of the sand layer groups of single wells in the whole area according to the adjusted division of the sand layer groups.

7. 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 stratigraphic division and comparison method based on spectral logging described in any one of claims 1 to 3 is implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for stratigraphic division and comparison based on spectral logging described in any one of claims 1 to 3 is implemented.

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