Intelligent multi-well stratigraphic comparison method

Abstract

The invention provides an intelligent multi-well stratigraphic comparison method. The intelligent multi-well stratigraphic comparison method comprises the steps of encoding geologic age stratums, establishing a database, layering and encoding stratums, establishing an interpretation profile, describing geologic features, storing feature data, establishing a comparison map, determining stratigraphic relationships, and repeatedly comparing and determining stratigraphic corresponding relationships. According to the method, the accuracy and efficiency of geologic age stratigraphic comparison can be improved, and geological exploration and accurate development of oil and gas resources are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of geological exploration technology, and more specifically, to an intelligent multi-well formation comparison method. Background Art

[0002] In existing geological exploration technologies, stratigraphic correlation mainly relies on expert experience and manual analysis, which is time-consuming and inefficient. The accuracy of stratigraphic correlation is limited by personal experience and knowledge level, making it difficult to standardize and automate. In multi-well stratigraphic correlation, due to the lack of unified coding and database support, there are often inconsistencies and repeatability issues in the comparison between strata of different geological ages. In addition, traditional stratigraphic correlation methods have difficulty in handling large-scale data and complex geological structures, resulting in limited reliability and accuracy of the comparison results.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that there are at least the following problems or defects in the prior art: the stratigraphic comparison process lacks intelligent and automated support, resulting in insufficient comparison efficiency and accuracy; the existing methods are difficult to adapt to the stratigraphic comparison needs under different geological conditions and lack flexibility and adaptability; and in multi-well stratigraphic comparison, there is a lack of effective data management and analysis tools, making it difficult to scale and systematize the stratigraphic comparison work. Summary of the invention

[0004] The present invention provides an intelligent multi-well formation comparison method, comprising: Step 1: Encode the strata of different geological ages in the study area according to their sedimentary characteristics and establish a stratigraphic geological age database; Step 2, stratify and encode the geological strata in each established exploration well; Step 3, establishing interpretation profiles for each geological age stratum in each exploration well; Step 4, describing the geological characteristics of each geological age stratum in each exploration well; Step 5, storing the geological characteristics of each geological age stratum in each exploration well; Step 6, establishing an intelligent multi-well formation comparison map, including: Step 7, based on the intelligent multi-well stratigraphic comparison map, determine the stratigraphic relationship between any geological age stratigraphic layer and the stratigraphic layer above and below any well in any block and other exploration wells; Step 8, repeating steps 6 to 7 in sequence, comparing and determining the correspondence between the upper and lower strata of each geological age stratum, between the geological age strata in any exploration well, and between the geological age strata in each exploration well in any block.

[0005] Furthermore, in step 1, the strata of different geological ages in the study area are coded according to the sedimentary characteristics and a stratigraphic geological age database is established, specifically: The strata of different geological ages in the study area are divided into marine phase, marine-continental transition phase and continental phase. According to the marine phase in step 1, it is further divided into coastal deposits and shallow marine deposits. According to the marine-continental transition phase in step 1, it can be divided into river-lake delta deposits, braided river deposits, river alluvial deposits, lake deposits, swamp deposits and residual hill landform deposits; According to the terrestrial phase in step 1, it is further divided into river alluvial deposits, lake deposits, desert deposits, alluvial plains and residual hill landform deposits; Sediments are classified as sandstone, mudstone and / or siltstone, and the sediments are coded according to the types of sandstone, mudstone and / or siltstone; A stratigraphic geological age database is established for sediments with different sedimentary characteristics.

[0006] Furthermore, in step 2, each geological age stratum in each established exploration well is stratigraphically stratified and coded; Specifically, on the basis of the completion of step 1, in step 2, the strata of different geological ages in the exploration well are stratigraphically stratified, and the strata are named and coded according to the stratigraphic geological age database corresponding to step 1.

[0007] Furthermore, in step 3, an interpretation profile is established for each geological stratum in each exploration well in step 2, specifically: Step 3.1, based on step 2, organize and analyze the established stratigraphic layers, obtain the sedimentary characteristics of each geological age, and establish interpretation plates of each geological age; Step 3.2, based on step 3.1, compare the strata in each geological age, and correspond the sedimentary characteristics of the strata in each geological age with the interpretation plates of the strata in each geological age in step 3.1.

[0008] Furthermore, in step 4, the geological characteristics of each geological age stratum in each exploration well in step 2 are described, specifically: According to the distribution characteristics, sedimentary characteristics and reservoir properties of each geological stratum in each exploration well in step 2, each geological stratum is compared to obtain geological characteristic description data of each geological stratum in each exploration well, and a database is established for the geological characteristic description of each geological stratum in each exploration well.

[0009] Furthermore, in step 6, an intelligent multi-well formation comparison map is established, specifically: Step 6.1, the geological characteristics of each geological age stratum in each exploration well in step 5 are described to establish a database. On the basis of establishing an intelligent multi-well stratum comparison map, the stratum characteristics in multiple exploration wells are studied by clustering and similarity matrix methods, and the sedimentation pattern is analyzed. On the basis of the establishment of the sedimentation pattern, the sedimentation pattern of the entire study time and space is established by using interpolation method and inference prediction method; Step 6.2, based on the geological information data of each exploration well in step 6.1, stratigraphic comparison is performed, similar geological and geological features between different wells are connected, and geological and geological feature data of the comparison wells are formed, and a geological and geological feature library of the comparison wells is established, and an intelligent multi-well stratigraphic comparison map is established; Step 6.3, using the intelligent multi-well stratigraphic comparison map established in step 6.2, establish a stratigraphic column chart for each geological age stratum in step 2.

[0010] Furthermore, in step 7, based on the established intelligent multi-well stratigraphic comparison map, the stratigraphic relationship between any geological age stratigraphic layer above and below any well in any block and other exploration wells is determined; Specifically, the geological characteristics of the comparison well are established through the geological chronostratigraphic interpretation plate establishment method in step 2, the geological chronostratigraphic interpretation profile establishment method in step 3, the geological chronostratigraphic feature description establishment method in step 4, the geological chronostratigraphic feature description database establishment method in step 5, the sedimentation model establishment method in step 6.1 and the geological chronostratigraphic feature library establishment method in step 6.2. Based on the established geological characteristics, in the intelligent multi-well stratigraphic comparison map centered on the comparison well, the similarity values ​​between the geological characteristics of other wells and the geological characteristics of the comparison well are calculated, and the exploration wells whose similarity values ​​between the geological characteristics of the remaining wells and the geological characteristics of the comparison well exceed the set value are determined, and the exploration wells whose similarity values ​​exceed the set value are used as the contemporary wells of the comparison well.

[0011] Furthermore, in step 8, steps 6 to 7 are repeated in sequence to compare and determine the correspondence between the upper and lower strata of each geological chronological stratum, between the geological chronological strata in any exploration well, and between the geological chronological strata in each exploration well in any block; Specifically, after step 7 is completed, other geological chronological strata are compared in turn, and steps 6 to 7 are repeated to compare and determine the correspondence between the upper and lower strata of each geological chronological stratum, between each geological chronological stratum in any exploration well, between geological chronological strata in any well, and between the same geological age in each exploration well in any block.

[0012] Furthermore, the explanation plate in step 3.1 includes: Sediment thickness plates, sedimentary lithology plates, sedimentary structure plates, reservoir plates, and oil and gas content plates; Step 3.2 is specifically as follows: based on the sediment thickness map established in step 3.1, determine the vertical development characteristics of the sediments and form a vertical sediment thickness map; Based on the sedimentary lithology map established in step 3.1, the development characteristics of the sediments are studied and a vertical sedimentary lithology map is formed; Based on the sedimentary structure map in step 3.1, study the sedimentary structure development characteristics and form a vertical sedimentary structure map; In step 3.1, the reservoir map forms a vertical reservoir development characteristic map; In step 3.1, the oil and gas reserve distribution map forms a vertical oil and gas reserve development characteristic map.

[0013] Furthermore, in step 7, based on the established intelligent multi-well stratigraphic comparison map, the stratigraphic relationship between any geological age stratigraphic layer above and below any well in any block and other exploration wells is determined; Specifically: in step 7, the geological age of any geological stratum in any well in any block is compared with that of any geological stratum in other exploration wells in any block, and the geological characteristics of the geological stratum are compared and marked, and the exploration well with a similarity value exceeding the set value is regarded as the contemporary well of the geological stratum in any well in any block.

[0014] The above-mentioned embodiments of the present invention have at least the following beneficial effects: the intelligent multi-well stratigraphic comparison method provided by the present invention can significantly improve the efficiency and accuracy of stratigraphic comparison. By establishing a stratigraphic geological age database and an intelligent multi-well stratigraphic comparison map, the method can systematically process and analyze geological data, and can reduce the dependence on expert experience and manual analysis. The application of this method can make stratigraphic comparison work more standardized and automated, thereby improving the work efficiency of geological exploration and the reliability of results.

[0015] In addition, this method studies the stratigraphic characteristics of multiple exploration wells through clustering and similarity matrix methods, can effectively analyze the sedimentation pattern, and use interpolation and inference prediction methods to establish the sedimentation pattern of the entire research time and space. This intelligent processing method can better adapt to the needs of stratigraphic comparison under different geological conditions, improve the flexibility and adaptability of stratigraphic comparison, help geological prospectors to understand and interpret geological structures more accurately, and provide strong technical support for the exploration and development of oil and gas resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which: Figure 1 A schematic flow chart of an intelligent multi-well formation comparison method provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0017] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0018] Those skilled in the art know that the embodiments of the present invention can be implemented as a system, device, apparatus, method or computer program product. Therefore, the present invention can be specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0019] It should be noted that any number of elements in the drawings is for illustration rather than limitation, and any naming is only for distinction and does not have any limiting meaning.

[0020] Reference below Figure 1 , Figure 1 The figure is a flow chart of an intelligent multi-well formation comparison method provided by one embodiment of the present invention. Figure 1 As shown, an intelligent multi-well formation comparison method 100 includes: Step 1: Encode the strata of different geological ages in the study area according to their sedimentary characteristics and establish a stratigraphic geological age database; Step 2, stratify and encode the geological strata in each established exploration well; Step 3, establishing interpretation profiles for each geological age stratum in each exploration well; Step 4, describing the geological characteristics of each geological age stratum in each exploration well; Step 5, storing the geological characteristics of each geological age stratum in each exploration well; Step 6, establishing an intelligent multi-well formation comparison map, including: Step 7, based on the intelligent multi-well stratigraphic comparison map, determine the stratigraphic relationship between any geological age stratigraphic layer and the stratigraphic layer above and below any well in any block and other exploration wells; Step 8, repeating steps 6 to 7 in sequence, comparing and determining the correspondence between the upper and lower strata of each geological age stratum, between the geological age strata in any exploration well, and between the geological age strata in each exploration well in any block.

[0021] It should be noted that this method first involves coding the strata of different geological ages in the study area and establishing a stratigraphic geological age database. Here, coding refers to assigning a unique identifier to each geological age stratum, and the stratigraphic geological age database is a system that stores these codes and related information. By appropriately expanding this step, we can divide the strata in the study area into marine phase, marine-continental transition phase, and continental phase, and further subdivide them into specific types such as coastal deposits and shallow marine deposits. At the same time, sediments are classified and coded according to categories such as sandstone, mudstone, and siltstone.

[0022] Specifically, we can set parameters. For example, for each geological chronological stratum, we can assign a code consisting of letters and numbers according to its sedimentary characteristics and lithology. For example, marine coastal deposits can be coded as MB, where M represents marine facies and B represents coastal deposits. The stratigraphic geological chronological database can contain information such as the code, age, lithology, thickness, and possible geological event records of the stratum.

[0023] Preferably, we can further refine this step. For example, for the coding of each geological stratum, we can consider adding more geological characteristics, such as salinity, temperature and other parameters of the sedimentary environment, to improve the discrimination of the coding.

[0024] Furthermore, the establishment of the stratigraphic geological age database can adopt a distributed storage system to facilitate the processing of large-scale data and improve data retrieval efficiency. For the update and maintenance of the database, a regular data review and proofreading process can be set to ensure the accuracy and timeliness of the data.

[0025] In some embodiments, in step 1, the strata of different geological ages in the study area are coded according to the sedimentary characteristics and a stratigraphic geological age database is established, specifically: The strata of different geological ages in the study area are divided into marine phase, marine-continental transition phase and continental phase. According to the marine phase in step 1, it is further divided into coastal deposits and shallow marine deposits. According to the marine-continental transition phase in step 1, it can be divided into river-lake delta deposits, braided river deposits, river alluvial deposits, lake deposits, swamp deposits and residual hill landform deposits; According to the terrestrial phase in step 1, it is further divided into river alluvial deposits, lake deposits, desert deposits, alluvial plains and residual hill landform deposits; Sediments are classified as sandstone, mudstone and / or siltstone, and the sediments are coded according to the types of sandstone, mudstone and / or siltstone; A stratigraphic geological age database is established for sediments with different sedimentary characteristics.

[0026] It should be noted that this step involves coding the different geological strata in the study area according to their sedimentary characteristics and establishing a stratigraphic geological chronology database. Here, sedimentary characteristics refer to the sedimentary environment of the strata and the nature of the sediments, such as marine phase, marine-continental transition phase and continental phase. Coding refers to assigning a unique identifier to each geological stratum, and the stratigraphic geological chronology database is a system that stores these codes and related information.

[0027] Specifically, we can divide the strata into three categories according to the sedimentary environment: marine, transitional and terrestrial. The marine phase is further subdivided into coastal deposits and shallow marine deposits; the transitional phase includes river-lake delta deposits, braided river deposits, etc.; the terrestrial phase covers river alluvial deposits, lake deposits, etc. For sediments, we classify them into categories such as sandstone, mudstone and siltstone, and assign a code to each category. For example, coastal deposited sandstone can be coded as SCS, where S stands for sandstone, C stands for coastal deposits, and S stands for marine. The stratigraphic geological chronological database will contain these codes as well as information such as the age, thickness, lithology and possible geological events of the strata.

[0028] Preferably, we can further refine the coding rules, for example, add a timestamp to each stratum to record the time range of its formation. In addition, the database can be managed using structured query language (SQL) to facilitate efficient query and update of data. When designing the database, you can consider introducing version control to track the change history of stratum information. For the description of the stratum, in addition to basic lithology and age information, it can also include the biological fossil record, geochemical characteristics, etc. of the stratum to provide more comprehensive geological information.

[0029] In some embodiments, in step 2, each geological age stratum in each established exploration well is stratigraphically stratified and coded; Specifically, on the basis of the completion of step 1, in step 2, the strata of different geological ages in the exploration well are stratigraphically stratified, and the strata are named and coded according to the stratigraphic geological age database corresponding to step 1.

[0030] It should be noted that this step involves stratigraphic stratification and coding of each geological stratum in each established exploration well. Here, stratigraphic stratification refers to dividing the strata into different levels or units according to geological characteristics, and coding refers to assigning a unique identifier to each stratigraphic unit after stratification. This process is to ensure the standardization of stratigraphic information and facilitate subsequent comparative analysis.

[0031] Specifically, we can carry out detailed stratification of the strata in each exploration well based on the completion of the stratigraphic geological age database. Each stratum will be identified according to its lithology, age, thickness and other characteristics, and named and coded according to the previously established coding rules. For example, if the stratum in an exploration well belongs to the sandstone of marine coastal deposits, then this layer can be coded as MBS, where M represents marine facies, B represents coastal deposits, and S represents sandstone. Specific parameter settings may include the minimum thickness standard of the stratum, the division boundary of the age, etc.

[0032] Preferably, we can further refine the process of stratigraphic stratification. For example, we can introduce automatic measurement technology of stratigraphic thickness, such as seismic tomography technology, to assist in the identification and stratification of stratigraphic units. In addition, geostatistical methods can be used to assess the continuity and integrity of stratigraphic units. In the coding process, in addition to basic lithology and age information, geochemical data and biostratigraphic data of stratigraphic units can also be considered to provide a more comprehensive description of stratigraphic characteristics. For the naming and coding of stratigraphic units, a central database management system can be used to ensure the consistency and traceability of stratigraphic coding for all exploration wells.

[0033] In some embodiments, in step 3, an interpretation profile is established for each geological stratum in each exploration well in step 2, specifically: Step 3.1, based on step 2, organize and analyze the established stratigraphic layers, obtain the sedimentary characteristics of each geological age, and establish interpretation plates of each geological age; Step 3.2, based on step 3.1, compare the strata in each geological age, and correspond the sedimentary characteristics of the strata in each geological age with the interpretation plates of the strata in each geological age in step 3.1.

[0034] It should be noted that this step involves describing the geological characteristics of each geological stratum in each exploration well. Here, geological characteristics refer to the physical, chemical and biological properties of the stratum, such as rock type, sedimentary structure, mineral composition, etc. This process is to record and analyze the characteristics of the stratum in detail for more accurate comparison and interpretation.

[0035] Specifically, we can describe the geological characteristics of the strata in each exploration well in detail based on the stratigraphic strata and coding. This includes recording the lithology, color, structure, thickness, fossil content and other information of the strata. For example, for a specific stratum, we might describe it as gray-black shale, rich in marine fossils, and about 10 meters thick. These description data will be used to build a geological characteristic description database, which contains the detailed characteristics of each geological stratum in each exploration well.

[0036] Preferably, we can further refine the process of geological feature description. For example, we can use high-resolution geological sampling techniques, such as core drilling, to obtain more accurate stratigraphic samples. In addition, geochemical analysis techniques, such as X-ray fluorescence spectroscopy, can be used to determine the composition of minerals in the strata. When describing the biological characteristics of the strata, paleontological methods such as fossil identification and biostratigraphic division can be used. For the establishment of a geological feature description database, a relational database management system can be used to facilitate data query and update. When entering data, data validation rules can be set to ensure that all input data is accurate and consistent.

[0037] In some embodiments, in step 4, the geological characteristics of each geological age stratum in each exploration well in step 2 are described, specifically: According to the distribution characteristics, sedimentary characteristics and reservoir properties of each geological stratum in each exploration well in step 2, each geological stratum is compared to obtain geological characteristic description data of each geological stratum in each exploration well, and a database is established for the geological characteristic description of each geological stratum in each exploration well.

[0038] It should be noted that this step involves the creation of an intelligent multi-well stratigraphic comparison map, which is a comprehensive comparison tool that integrates geological information from multiple exploration wells. An intelligent multi-well stratigraphic comparison map is a visual chart that can show the relationship and similarity between geological chronological strata in different exploration wells. The purpose of this tool is to provide an intuitive platform so that geologists and engineers can more easily identify and compare strata in different exploration wells.

[0039] Specifically, after collecting and describing the geological characteristics of each geological stratum in each exploration well, we can use computer-aided design software or geological information system (GIS) to create an intelligent multi-well stratigraphic comparison map. This chart will contain information such as the coding, lithology, thickness, fossil distribution, etc. of the geological strata of each exploration well, as well as the comparative relationship between them. For example, through the comparison map, we can identify which strata have similar lithology and thickness in different exploration wells, and thus infer that they may belong to the same geological period.

[0040] Preferably, we can further refine the creation process of the intelligent multi-well stratigraphic comparison map. For example, we can use advanced data mining techniques, such as cluster analysis, to automatically identify similar stratigraphic features in different exploration wells. In addition, machine learning algorithms can be introduced to predict the geological characteristics of unknown strata, thereby improving the accuracy of the comparison map. In the design of the comparison map, interactive functions can be provided to allow users to adjust the view, filter specific strata, or query detailed information as needed. In order to improve the practicality of the comparison map, a user-friendly interface can be developed so that non-professionals can easily use this tool.

[0041] In some embodiments, in step 6, establishing an intelligent multi-well formation comparison map is specifically as follows: Step 6.1, the geological characteristics of each geological age stratum in each exploration well in step 5 are described to establish a database. On the basis of establishing an intelligent multi-well stratum comparison map, the stratum characteristics in multiple exploration wells are studied by clustering and similarity matrix methods, and the sedimentation pattern is analyzed. On the basis of the establishment of the sedimentation pattern, the sedimentation pattern of the entire study time and space is established by using interpolation method and inference prediction method; Step 6.2, based on the geological information data of each exploration well in step 6.1, stratigraphic comparison is performed, similar geological and geological features between different wells are connected, and geological and geological feature data of the comparison wells are formed, and a geological and geological feature library of the comparison wells is established, and an intelligent multi-well stratigraphic comparison map is established; Step 6.3, using the intelligent multi-well stratigraphic comparison map established in step 6.2, establish a stratigraphic column chart for each geological age stratum in step 2.

[0042] It should be noted that this step involves the specific process of establishing an intelligent multi-well stratigraphic comparison map, which includes the clustering and similarity matrix methods to study the stratigraphic characteristics of multiple exploration wells, and the use of interpolation and inference prediction methods to establish the sedimentary pattern of the entire study time and space. Here, clustering refers to grouping strata with similar characteristics, and the similarity matrix is ​​a mathematical tool used to quantify the similarities between different strata.

[0043] Specifically, after collecting the geological characteristics description data of each geological age in each exploration well, we can use statistical software or specialized geological analysis software to perform cluster analysis. This analysis will group similar strata according to the lithology, thickness, fossil distribution and other characteristics of the strata. At the same time, we can construct a similarity matrix to determine the correspondence between different stratum characteristics by calculating the similarity between them. For example, we can use metrics such as Euclidean distance or cosine similarity to fill in the similarity matrix. Then, we can use interpolation methods to predict the geological characteristics of those strata with incomplete data, and use inference prediction methods to establish the sedimentation pattern of the entire study area.

[0044] Preferably, we can further refine the process of establishing the intelligent multi-well stratigraphic comparison map. For example, we can adopt a multi-level clustering method that not only considers the characteristics of a single stratigraphic layer, but also the relative position relationship between stratigraphic layers. In the construction of the similarity matrix, more geological parameters, such as geochemical data and paleontological data of the stratigraphic layer, can be introduced to improve the accuracy of the analysis. For interpolation and inference prediction methods, advanced techniques such as Kriging or trend surface analysis in geostatistics can be used.

[0045] Furthermore, an automated process can be developed to integrate these analysis steps into a software tool to improve efficiency and reduce human errors. In the software tool, a variety of preset analysis parameters and methods can be provided, while also allowing users to customize parameters and methods according to specific geological conditions.

[0046] In some embodiments, in step 7, based on the established intelligent multi-well stratigraphic comparison map, the stratigraphic relationship between any geological age stratigraphic layer above and below any well in any block and other exploration wells is determined; Specifically, the geological characteristics of the comparison well are established through the geological chronostratigraphic interpretation plate establishment method in step 2, the geological chronostratigraphic interpretation profile establishment method in step 3, the geological chronostratigraphic feature description establishment method in step 4, the geological chronostratigraphic feature description database establishment method in step 5, the sedimentation model establishment method in step 6.1 and the geological chronostratigraphic feature library establishment method in step 6.2. Based on the established geological characteristics, in the intelligent multi-well stratigraphic comparison map centered on the comparison well, the similarity values ​​between the geological characteristics of other wells and the geological characteristics of the comparison well are calculated, and the exploration wells whose similarity values ​​between the geological characteristics of the remaining wells and the geological characteristics of the comparison well exceed the set value are determined, and the exploration wells whose similarity values ​​exceed the set value are used as the contemporary wells of the comparison well.

[0047] It should be noted that this step involves determining the stratigraphic relationship between any geological age stratigraphic layer and other exploration wells in any well in any block based on the intelligent multi-well stratigraphic comparison map. Here, stratigraphic relationship refers to the relative position and connection between different stratigraphic layers. For example, one stratigraphic layer may be located above or below another stratigraphic layer. The purpose of this process is to clarify the corresponding relationship between stratigraphic layers in different exploration wells in order to better understand the geological structure.

[0048] Specifically, we can use the intelligent multi-well stratigraphic comparison map to determine the correspondence between the stratigraphic features in different exploration wells by comparing them. For example, if the stratigraphic layers in two exploration wells have similar lithology and fossil distribution, we can consider them to be of the same period. In this process, we can use a computer program to automatically calculate the similarity values ​​between the stratigraphic layers and determine which stratigraphic layers have a similarity that exceeds a preset threshold and are therefore considered to be of the same period. Specific parameter settings may include similarity calculation methods (such as cosine similarity or Jaccard similarity), threshold settings, etc.

[0049] Preferably, we can further refine the process of determining stratigraphic relationships. For example, we can introduce more geological parameters, such as geochemical and paleontological characteristics of the strata, to improve the accuracy of similarity calculations. When calculating similarity, we can use a weighted approach to give certain parameters higher weights to reflect their importance in stratigraphic comparison.

[0050] Furthermore, an interactive user interface can be developed to allow geologists to manually adjust parameters and thresholds to suit different geological conditions and research purposes. After determining the stratigraphic relationships, a report can be automatically generated, detailing the corresponding relationships of the stratigraphic layers in each exploration well, as well as their geological characteristics and similarity values.

[0051] In some embodiments, in step 8, steps 6 to 7 are repeated in sequence to compare and determine the correspondence between the upper and lower strata of each geological chronological stratum, between the geological chronological strata in any exploration well, and between the geological chronological strata in each exploration well in any block; Specifically, after step 7 is completed, other geological chronological strata are compared in turn, and steps 6 to 7 are repeated to compare and determine the correspondence between the upper and lower strata of each geological chronological stratum, between each geological chronological stratum in any exploration well, between geological chronological strata in any well, and between the same geological age in each exploration well in any block.

[0052] It should be noted that this step involves repeating steps 6 to 7 in sequence to compare and determine the corresponding relationship between the upper and lower strata of each geological chronological stratum, between the geological chronological strata in any exploration well, and between the geological chronological strata in each exploration well in any block. Here, comparison and determination refers to clarifying the relationship between different strata through comparison and analysis, including their relative positions and time sequence in geological history.

[0053] Specifically, after completing the comparative analysis of any geological chronological strata, we can continue to perform the same analysis on the next geological chronological strata. This process involves using the intelligent multi-well stratigraphic comparison map again, as well as the previously established geological feature description database, to identify and compare the characteristics of strata of different geological chronologies. For example, we can compare the lithology, thickness, and fossil records of strata of the same geological chronology in different exploration wells to determine whether they belong to the same stratigraphic unit. Specific parameter settings may include which features to select for comparison, how to quantify the similarity of these features, etc.

[0054] Preferably, we can further refine this comparative determination process. For example, we can develop an automated comparative tool that can automatically identify and compare key features of different geological strata and generate a report on the comparative results. This tool can be set to execute in a loop until all geological strata have been analyzed.

[0055] Furthermore, expert systems or machine learning algorithms can be introduced to assist in identifying complex stratigraphic relationships and improve the accuracy and efficiency of comparative analysis. After the comparative analysis is completed, a visual interface can be provided to display the comparative results of all geological strata and their corresponding relationships, so that geologists can intuitively understand and verify these relationships.

[0056] In some embodiments, the explanation plate in step 3.1 includes: Sediment thickness plates, sedimentary lithology plates, sedimentary structure plates, reservoir plates, and oil and gas content plates; Step 3.2 is specifically as follows: based on the sediment thickness map established in step 3.1, determine the vertical development characteristics of the sediments and form a vertical sediment thickness map; Based on the sedimentary lithology map established in step 3.1, the development characteristics of the sediments are studied and a vertical sedimentary lithology map is formed; Based on the sedimentary structure map in step 3.1, study the sedimentary structure development characteristics and form a vertical sedimentary structure map; In step 3.1, the reservoir map forms a vertical reservoir development characteristic map; In step 3.1, the oil and gas reserve distribution map forms a vertical oil and gas reserve development characteristic map.

[0057] It should be noted that this step involves establishing interpretation plates including sediment thickness plates, sediment lithology plates, sediment structure plates, reservoir plates and hydrocarbon content plates based on step 3.1. Here, interpretation plates refer to a series of charts that respectively show the sedimentary characteristics of the formation, such as thickness, lithology, structure, reservoir characteristics and hydrocarbon content. These plates help to deeply understand the geological characteristics of the formation and potential oil and gas resources.

[0058] Specifically, we can create corresponding interpretation plates based on the analysis of the sedimentary characteristics of strata in various geological periods. For example, the sedimentary thickness plate can show the vertical thickness changes of the strata, the sedimentary lithology plate can describe the rock composition of the strata, the sedimentary structure plate can analyze the structural characteristics of the strata, the reservoir plate can evaluate the oil storage capacity of the strata, and the hydrocarbon content plate can indicate the distribution of oil and gas in the strata. Specific parameter settings may include determining the scale, proportion and annotation standards of the plate, as well as selecting the type and range of data to be displayed.

[0059] Preferably, we can further refine the process of creating interpretation maps. For example, we can use geostatistical methods to analyze and predict the thickness and lithology of the formation, use seismic interpretation software to identify the structural characteristics of the formation, and use reservoir simulation technology to evaluate the oil storage characteristics of the formation. When creating oil and gas maps, geochemical analysis and geological modeling techniques can be combined to predict the distribution of oil and gas.

[0060] Furthermore, an integrated software platform can be developed to automate the creation and management of these plates and improve work efficiency. In the software platform, custom templates and parameter settings can be provided to adapt to different geological conditions and analysis requirements.

[0061] In some embodiments, in step 7, based on the established intelligent multi-well stratigraphic comparison map, the stratigraphic relationship between any geological age stratigraphic layer above and below any well in any block and other exploration wells is determined; Specifically: in step 7, the geological age of any geological stratum in any well in any block is compared with that of any geological stratum in other exploration wells in any block, and the geological characteristics of the geological stratum are compared and marked, and the exploration well with a similarity value exceeding the set value is regarded as the contemporary well of the geological stratum in any well in any block.

[0062] It should be noted that this step involves determining the stratigraphic relationship between any geological age stratigraphic layer and the upper and lower stratigraphic layers of any well in any block and other exploration wells based on the established intelligent multi-well stratigraphic comparison map. Here, stratigraphic relationship refers to the relative position relationship between stratigraphic layers, including the corresponding relationship between upper and lower stratigraphic layers. The purpose of this process is to establish the corresponding relationship between stratigraphic layers between different exploration wells in order to conduct more accurate geological analysis.

[0063] Specifically, we can determine the correspondence between strata of the same geological age in different exploration wells by comparing their geological characteristics based on the intelligent multi-well stratigraphic comparison map. For example, we can determine whether the strata in one exploration well correspond to the strata in another exploration well by comparing the lithology, thickness, fossil distribution and other characteristics of the strata. Specific parameter settings may include setting a similarity threshold, that is, when the similarity of the characteristics of two strata exceeds this value, they can be considered to be of the same period. In addition, we can also set parameters to determine the priority of stratigraphic comparison, such as giving priority to strata with high lithology matching.

[0064] Preferably, we can further refine the process of determining stratigraphic relationships. For example, we can introduce more geological parameters, such as geochemical and paleontological characteristics of the strata, to improve the accuracy of stratigraphic correlation. In the correlation process, a weighted scoring system can be used to give different weights to different geological features according to their importance.

[0065] Furthermore, an automated comparison tool can be developed that can automatically identify and compare key features of different geological strata and generate a report of the comparison results. This tool can be set to execute in a loop until all geological strata have been analyzed. In the report, the corresponding relationships of the strata in each exploration well, as well as their geological characteristics and similarity values, can be described in detail, so that geologists can intuitively understand and verify these relationships.

[0066] The above-mentioned embodiments of the present invention have the following beneficial effects: the intelligent multi-well stratigraphic comparison method of the present invention can optimize the coding and database establishment process of geological chronological strata, making the management and retrieval of stratigraphic information more efficient. By encoding strata of different geological chronological periods according to sedimentary characteristics and establishing a stratigraphic geological chronological database, accurate basic data support can be provided for subsequent stratigraphic comparison work. The application of this method can ensure the consistency of stratigraphic stratification and coding, thereby improving the accuracy and reliability of stratigraphic comparison.

[0067] Furthermore, this method can enhance the intelligence level of stratigraphic correlation. By establishing an intelligent multi-well stratigraphic correlation map and using technical means such as clustering and similarity matrix, the stratigraphic characteristics in multiple exploration wells can be deeply studied and analyzed, thereby revealing the sedimentary pattern and predicting geological characteristics. The application of this method can greatly improve the automation level of stratigraphic correlation, reduce manual operations, reduce the error rate, and provide more accurate geological information for geological exploration and resource development.

[0068] Furthermore, the storage medium of the embodiment of the present application stores program instructions that can implement all the above methods, wherein the program instructions can be stored in the above storage medium in the form of a software product, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or terminal devices such as a computer, a server, a mobile phone, and a tablet.

[0069] The above descriptions are only some preferred embodiments of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present invention.

Claims

1. An intelligent multi-well formation comparison method, characterized in that: The steps include: Step 1: Encode the strata of different geological ages in the study area according to their sedimentary characteristics and establish a stratigraphic geological age database; Step 2, stratify and encode the geological strata in each established exploration well; Step 3, establishing interpretation profiles for each geological age stratum in each exploration well; Step 4, describing the geological characteristics of each geological age stratum in each exploration well; Step 5, storing the geological characteristics of each geological age stratum in each exploration well; Step 6, establishing an intelligent multi-well formation comparison map, including: Step 7, based on the intelligent multi-well stratigraphic comparison map, determine the stratigraphic relationship between any geological age stratigraphic layer and the stratigraphic layer above and below any well in any block and other exploration wells; Step 8, repeating steps 6 to 7 in sequence, comparing and determining the correspondence between the upper and lower strata of each geological age stratum, between the geological age strata in any exploration well, and between the geological age strata in each exploration well in any block.

2. The intelligent multi-well formation comparison method according to claim 1, characterized in that: In step 1, the strata of different geological ages in the study area are coded according to the sedimentary characteristics and a stratigraphic geological age database is established, specifically: The strata of different geological ages in the study area are divided into marine phase, marine-continental transition phase and continental phase. According to the marine phase in step 1, it is further divided into coastal deposits and shallow marine deposits. According to the marine-continental transition phase in step 1, it can be divided into river-lake delta deposits, braided river deposits, river alluvial deposits, lake deposits, swamp deposits and residual hill landform deposits; According to the terrestrial phase in step 1, it is further divided into river alluvial deposits, lake deposits, desert deposits, alluvial plains and residual hill landform deposits; Sediments are classified as sandstone, mudstone and / or siltstone, and the sediments are coded according to the types of sandstone, mudstone and / or siltstone; A stratigraphic geological age database is established for sediments with different sedimentary characteristics.

3. The intelligent multi-well formation comparison method according to claim 2, characterized in that: In step 2, each geological age stratum in each established exploration well is stratigraphically stratified and coded; Specifically, on the basis of the completion of step 1, in step 2, the strata of different geological ages in the exploration well are stratigraphically stratified, and the strata are named and coded according to the stratigraphic geological age database corresponding to step 1.

4. The intelligent multi-well formation comparison method according to claim 3, characterized in that: In step 3, an interpretation profile is established for each geological stratum in each exploration well in step 2, specifically: Step 3.1, based on step 2, organize and analyze the established stratigraphic layers, obtain the sedimentary characteristics of each geological age, and establish interpretation plates of each geological age; Step 3.2, based on step 3.1, compare the strata in each geological age, and correspond the sedimentary characteristics of the strata in each geological age with the interpretation plates of the strata in each geological age in step 3.

1.

5. The intelligent multi-well formation comparison method according to claim 4, characterized in that: In step 4, the geological characteristics of each geological age stratum in each exploration well in step 2 are described, specifically: According to the distribution characteristics, sedimentary characteristics and reservoir properties of each geological stratum in each exploration well in step 2, each geological stratum is compared to obtain geological characteristic description data of each geological stratum in each exploration well, and a database is established for the geological characteristic description of each geological stratum in each exploration well.

6. The intelligent multi-well formation comparison method according to claim 5, characterized in that: In step 6, an intelligent multi-well formation comparison map is established, specifically: Step 6.1, the geological characteristics of each geological age stratum in each exploration well in step 5 are described to establish a database. On the basis of establishing an intelligent multi-well stratum comparison map, the stratum characteristics in multiple exploration wells are studied by clustering and similarity matrix methods, and the sedimentation pattern is analyzed. On the basis of the establishment of the sedimentation pattern, the sedimentation pattern of the entire study time and space is established by using interpolation method and inference prediction method; Step 6.2, based on the geological information data of each exploration well in step 6.1, stratigraphic comparison is performed, similar geological and geological features between different wells are connected, and geological and geological feature data of the comparison wells are formed, and a geological and geological feature library of the comparison wells is established, and an intelligent multi-well stratigraphic comparison map is established; Step 6.3, using the intelligent multi-well stratigraphic comparison map established in step 6.2, establish a stratigraphic column chart for each geological age stratum in step 2.

7. The intelligent multi-well formation comparison method according to claim 5, characterized in that: In the step 7, based on the established intelligent multi-well stratigraphic comparison map, the stratigraphic relationship between the upper and lower stratigraphic layers of any geological age stratigraphic layer of any well in any block and other exploration wells is determined; Specifically, the geological characteristics of the comparison well are established through the geological chronostratigraphic interpretation plate establishment method in step 2, the geological chronostratigraphic interpretation profile establishment method in step 3, the geological chronostratigraphic feature description establishment method in step 4, the geological chronostratigraphic feature description database establishment method in step 5, the sedimentation model establishment method in step 6.1 and the geological chronostratigraphic feature library establishment method in step 6.

2. Based on the established geological characteristics, in the intelligent multi-well stratigraphic comparison map centered on the comparison well, the similarity values ​​between the geological characteristics of other wells and the geological characteristics of the comparison well are calculated, and the exploration wells whose similarity values ​​between the geological characteristics of the remaining wells and the geological characteristics of the comparison well exceed the set value are determined, and the exploration wells whose similarity values ​​exceed the set value are used as the contemporary wells of the comparison well.

8. The intelligent multi-well formation comparison method according to claim 7, characterized in that: In step 8, steps 6 to 7 are repeated in sequence to compare and determine the correspondence between the upper and lower strata of each geological chronological stratum, between the geological chronological strata in any exploration well, and between the geological chronological strata in each exploration well in any block; Specifically, after step 7 is completed, other geological chronological strata are compared in turn, and steps 6 to 7 are repeated to compare and determine the correspondence between the upper and lower strata of each geological chronological stratum, between each geological chronological stratum in any exploration well, between geological chronological strata in any well, and between the same geological age in each exploration well in any block.

9. The intelligent multi-well formation comparison method according to claim 4, characterized in that: The explanation board in step 3.1 includes: Sediment thickness plates, sedimentary lithology plates, sedimentary structure plates, reservoir plates, and oil and gas content plates; Step 3.2 is specifically as follows: based on the sediment thickness map established in step 3.1, determine the vertical development characteristics of the sediments and form a vertical sediment thickness map; Based on the sedimentary lithology map established in step 3.1, the development characteristics of the sediments are studied and a vertical sedimentary lithology map is formed; Based on the sedimentary structure map in step 3.1, study the sedimentary structure development characteristics and form a vertical sedimentary structure map; In step 3.1, the reservoir map forms a vertical reservoir development characteristic map; In step 3.1, the oil and gas reserve distribution map forms a vertical oil and gas reserve development characteristic map.

10. The intelligent multi-well formation comparison method according to claim 3, characterized in that: In the step 7, based on the established intelligent multi-well stratigraphic comparison map, the stratigraphic relationship between the upper and lower stratigraphic layers of any geological age stratigraphic layer of any well in any block and other exploration wells is determined; Specifically: in step 7, the geological age of any geological stratum in any well in any block is compared with that of any geological stratum in other exploration wells in any block, and the geological characteristics of the geological stratum are compared and marked, and the exploration well with a similarity value exceeding the set value is regarded as the contemporary well of the geological stratum in any well in any block.

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