A provincial-level 1:500,000 three-dimensional geological modeling method and system

Abstract

The present invention provides a provincial-level 1:500,000 three-dimensional geological modeling method and system. The present invention proposes a complete and feasible provincial-level 1:500,000 three-dimensional geological modeling process at an altitude of less than 2,500 meters. Based on the provincial 1:500,000 longitudinal modeling stratigraphic units, drilling data and basic geological maps, cross-sections at an altitude of less than 2,500 meters and an interval of 10 kilometers are pushed deep, and the provincial-level geological modeling area is covered by a series of cross-sections; a pseudo-fault block method is adopted, and based on the fault system, the modeling area is divided into different modeling blocks on the basis of following the structural occurrence; the three-dimensional geological body structure model of each modeling block is established by driving the geological knowledge within the block and reasoning with geological elements, and the provincial-level 1:500,000 three-dimensional geological body framework modeling at an altitude of less than 2,500 meters is completed; combined with the three-dimensional geological body attribute modeling, the attribute model is coupled with the framework model to form a three-dimensional geological body model integrating the framework and the attribute to realize the provincial-level ultra-deep and ultra-large-scale geological body modeling.

Description

Technical Field

[0001] The present invention relates to the field of geological information science and technology, and specifically to geological body modeling in industries such as glass earth, provincial glass earth, urban geology, mining geology, oil and gas geology, disaster geology, urban geology, environmental geology, and hydrogeology, especially a provincial-level 1:500,000 three-dimensional geological modeling method and system. Background Art

[0002] At present, Guizhou Province in China has taken the lead in developing key technologies for the provincial "Glass Land" and has carried out the construction of a multi-level, multi-scale and multi-element three-dimensional geological model. The construction goal of the provincial "Glass Land" is to systematically collect and make full use of the existing geological, physical, chemical and remote data in the province, especially deep drilling and seismic exploration data, and supplement a small amount of necessary ground surveys and geophysical work in a targeted manner. Through analysis and synthesis, the deep structural-stratigraphic framework of the province is systematically identified and calibrated, and a multi-level, multi-scale, multi-element fine three-dimensional geological model and information system of different scales in the province is established, and then a cloud service platform based on a microservice architecture is established to provide a data management and decision-making support platform with three-dimensional visualization expression and analysis functions for the analysis and exploration of deep mineral resources, land space planning and utilization, and deep factor analysis and prediction of ecological environmental fragility in the province. Summary of the invention

[0003] The purpose of the present invention is to provide a provincial 1:500,000 three-dimensional geological modeling method and system, which aims to solve the problems of collaborative modeling and local reasoning modeling of provincial ultra-deep and ultra-large-scale geological bodies under strict structural constraints in the prior art, improve the efficiency of geological body modeling and the quality of geological body models, and make high-quality modeling of provincial ultra-deep and ultra-large-scale geological bodies possible.

[0004] In order to achieve the above technical objectives, the present invention provides a provincial-level 1:500,000 three-dimensional geological modeling method, which includes the following operations:

[0005] Based on the provincial 1:500,000 vertical modeling stratigraphic units, drilling data and basic geological maps, cross sections with an interval of 10 km at an altitude of less than -2500 are pushed to cover the provincial geological modeling area through a series of cross sections;

[0006] The pseudo-fault block method is used to divide the modeling area into different modeling blocks based on the fault system and the structural orientation.

[0007] The three-dimensional geological structure model of each modeling block is established by using the geological knowledge driving and geological element reasoning within the block, and the three-dimensional geological framework modeling of the provincial level 1:500,000 altitude -2500 meters shallow is completed;

[0008] Combined with 3D geological body attribute modeling, the attribute model is coupled with the grid model to form a 3D geological body model integrating the grid and attributes.

[0009] Preferably, the modeling data needs to be encoded before the modeling, and the boundary surface encoding and the construction of the topological relationship between other geological entities are completed according to the 1:500,000 stratigraphic system and all fault systems of the entire province.

[0010] Preferably, the pseudo-fault partitioning method is to extend the fault to the boundary position in space according to the fault direction, and divide the area together with the boundary, wherein the extended part does not represent the existence of the fault, that is, the fault distance is 0, and it is only divided in space to partition the modeling data blocks in space.

[0011] Preferably, the three-dimensional geological body structural model expresses the geological semantics of stratum outcrops, stratum pinch-outs, sedimentary phase boundaries and sedimentary discontinuities.

[0012] The present invention also provides a provincial-level 1:500,000 three-dimensional geological modeling system, the system comprising:

[0013] The modeling area compilation module is used to model the stratigraphic units, drilling data and basic geological maps of the province at a scale of 1:500,000, and to push the cross-sections at an altitude of less than -2500 and an interval of 10 km, so as to cover the geological modeling area of ​​the province through a series of cross-sections;

[0014] The modeling block division module is used to divide the modeling area into different modeling blocks based on the fault system and the structural occurrence by using the pseudo-fault block method;

[0015] The structural modeling module is used to establish a three-dimensional geological body structure model of each modeling block by using the geological knowledge drive and geological element reasoning within the block, and complete the provincial-level 1:500,000 three-dimensional geological body framework modeling of the shallow -2500 meters above sea level;

[0016] The model coupling module is used to combine the three-dimensional geological body attribute modeling, couple the attribute model with the grid model, and form a three-dimensional geological body model integrating the grid and the attributes.

[0017] Preferably, the modeling data needs to be encoded before the modeling, and the boundary surface encoding and the construction of the topological relationship between other geological entities are completed according to the 1:500,000 stratigraphic system and all fault systems of the entire province.

[0018] Preferably, the pseudo-fault partitioning method is to extend the fault to the boundary position in space according to the fault direction, and divide the area together with the boundary, wherein the extended part does not represent the existence of the fault, that is, the fault distance is 0, and it is only divided in space to partition the modeling data blocks in space.

[0019] Preferably, the three-dimensional geological body structural model expresses the geological semantics of stratum outcrops, stratum pinch-outs, sedimentary phase boundaries and sedimentary discontinuities.

[0020] The effects provided in the content of the invention are only the effects of the embodiments, not all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

[0021] Compared with the prior art, the provincial-level modeling process proposed in the present invention determines a feasible provincial-scale modeling technology route, proposes a push-deep profile shallower than -2500 meters above sea level, and can complete the ultra-deep three-dimensional geological body modeling across the province. Since the series of push-deep profiles must be verified by the data of the map section, deep oil and gas wells, and geophysical exploration, and then verified in the field, the correctness of the data source for deep three-dimensional geological body modeling is guaranteed;

[0022] The pseudo-fault partitioning method proposed in the present invention can complete the ultra-large-scale three-dimensional geological body modeling across the province. The pseudo-fault partitioning method realizes the collaborative modeling of ultra-large-scale modeling tasks, making provincial-level high-quality modeling possible;

[0023] The intra-block geological knowledge-driven and geological element reasoning modeling method proposed in the present invention can realize the correct geological element expression inside the three-dimensional geological body, and can reflect the geological semantics such as stratum outcrop, stratum pinch-out, sedimentary phase boundary and sedimentary discontinuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a provincial-level 1:500,000 three-dimensional geological modeling method provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of dividing blocks using the pseudo-fault method provided in an embodiment of the present invention;

[0026] Figure 3 A three-dimensional schematic diagram of dividing blocks using the pseudo-fault method provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of knowledge-driven and geological element reasoning modeling provided in an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the division of modeling blocks of a certain area provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of a block geological body structure model provided in an embodiment of the present invention;

[0030] Figure 7 It is a schematic diagram of a complete geological body framework model of a certain area provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The present invention omits the description of known components and processing techniques and processes to avoid unnecessary limitations on the present invention.

[0032] A provincial-level 1:500,000 three-dimensional geological modeling method and system provided by an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, the embodiment of the present invention discloses a provincial-level 1:500,000 three-dimensional geological modeling method, the method comprising the following operations:

[0034] Based on the provincial 1:500,000 vertical modeling stratigraphic units, drilling data and basic geological maps, cross sections with an interval of 10 km at an altitude of less than -2500 are pushed to cover the provincial geological modeling area through a series of cross sections;

[0035] The pseudo-fault block method is used to divide the modeling area into different modeling blocks based on the fault system and the structural orientation.

[0036] The three-dimensional geological structure model of each modeling block is established by using the geological knowledge driving and geological element reasoning within the block, and the three-dimensional geological framework modeling of the provincial level 1:500,000 altitude -2500 meters shallow is completed;

[0037] Combined with 3D geological body attribute modeling, the attribute model is coupled with the grid model to form a 3D geological body model integrating the grid and attributes.

[0038] The embodiment of the present invention proposes a complete and feasible provincial-level 1:500,000 three-dimensional geological modeling process for an altitude of less than 2,500 meters, thereby realizing provincial-level ultra-deep and ultra-large-scale geological body modeling.

[0039] First, the modeling data is preprocessed. The modeling data preprocessing process is to convert the original one-dimensional (wells, holes) and two-dimensional (geological profiles, plane maps, and push-deep profiles shallower than -2500 meters above sea level, etc.) data of the province into three-dimensional data. Geological data from various sources are used in three-dimensional geological modeling as the data source for geological body modeling. Since the geological profile and plane map data are the results of interpretation by geologists, there may be certain differences in the three-dimensional space. It is necessary to deal with the interpretation conflicts in the data and use the processed data as the data source for geological body modeling.

[0040] Then encode the geological boundaries. According to the principle of boundary representation, the three-dimensional geological body model should be jointly expressed by all relevant boundaries and the spatial topological relationship between the boundaries. If you want to express the spatial relationship between geological units, the most important thing is the encoding method of each boundary surface, that is, according to the 1:500,000 stratigraphic system and all fault systems in the province, the boundary surface encoding and the topological relationship between other geological units are constructed. Therefore, before modeling the three-dimensional geological body, it is necessary to encode the data used for modeling to represent the contact relationship between the strata, and the contact relationship can be converted from the geological boundary to the geological interface. On the basis of the correct encoding of the stratigraphic age, a program can be written to allow the computer to automatically recognize the encoding of any stratigraphic interface segment.

[0041] The three-dimensional space is divided into blocks based on the pseudo-fault method. Since the blocks divided by the pseudo-fault block method strictly follow the constraints of the fault state, the constructed model naturally introduces the constraint structure, and at the same time realizes the collaborative modeling of ultra-large-scale modeling tasks, making provincial-level high-quality modeling possible. The pseudo-fault method is used to divide the space blocks, that is, the fault is extended to the boundary position according to the fault direction in space, and the area is divided together with the boundary. The extended part does not mean that there is a fault, that is, the fault distance is 0, but it is divided in space, which is used to partition the modeling data blocks in space, such as Figure 2 , 3 shown. Figure 2 Three faults are developed in the middle area, namely faults F1, F2, and F3, which divide the entire study area into four areas (1, 2, 3, and 4). The fault information provided by the plane map, geological profile map, and drilling (well) data is used to simulate regional faults and mark real faults and pseudo-faults. The area is divided into four closed areas in three-dimensional space by real faults and pseudo-faults. Due to the existence of X-shaped and Y-shaped faults, it is not possible to simply divide the area on the plane. It is necessary to divide the space in three-dimensional space according to the interlacing of faults. The automatic division of fault blocks can be realized by combining the spatial binary tree (BSP tree). The divided blocks completely follow the occurrence of the faults, reflecting the contact relationship between the fault blocks, thereby integrating complex structural information into the model.

[0042] After the block is divided, geological knowledge-driven and geological element reasoning modeling are carried out in the block. The three-dimensional geological body framework modeling in the block is mainly to complete the interpolation fitting of the stratigraphic layers and sedimentary phase interfaces in the block. However, in the interpolation fitting process of each layer / interface, no matter which interpolation method is used, the stratigraphic layer model interpolated inside the block needs to consider the erosion of each layer in the block, the pinching out of the stratigraphic layer, and the upper and lower relationships with the stratigraphic layers of adjacent blocks. For example, the upper and lower plates of the normal faults are driven by geological knowledge and geological element reasoning modeling to complete the three-dimensional geological body framework modeling in the block, such as Figure 4 The three-dimensional geological body structure model of each modeling block is established by the modeling method driven by geological knowledge within the block and geological element reasoning. The three-dimensional geological body model of the block reflects the geological semantics such as stratum outcrop, stratum pinch-out, sedimentary phase boundary and sedimentary discontinuity.

[0043] Finally, attribute modeling is performed on the three-dimensional geological body. Attribute modeling of three-dimensional geological body refers to the interpolation of attribute fields using geostatistical methods or multi-point geostatistical methods for various attribute data, such as temperature, resistivity, porosity, etc., and finally coupling with the three-dimensional geological body framework model mentioned above to form a three-dimensional geological body model that integrates the framework and attributes.

[0044] In the embodiment of the present invention, a 1:500,000 modeling of a certain area is taken as an example. According to relevant geological knowledge, the modeling area is divided into secondary modeling blocks according to the pseudo-fault method, such as Figure 5 As shown in the figure, the actual example of dividing the modeling blocks according to the pseudo-fault method. The closed areas such as A1 and A2 are the divided modeling areas, and the unclosed areas are the parts to be further divided into modeling blocks. The three-dimensional geological structure modeling within the block is completed by using geological knowledge-driven and geological element reasoning modeling. Figure 6 The 3D geological structure model of one of the modeling blocks is shown. The geological knowledge-driven and geological element reasoning modeling method is adopted to complete the structural modeling of all blocks in the area through collaborative modeling. Finally, integrated scheduling is implemented to realize real-time browsing and query analysis of all 3D geological frame models in the area. Figure 7 shown.

[0045] The embodiment of the present invention further provides a provincial-level 1:500,000 three-dimensional geological modeling system, the system comprising:

[0046] The modeling area compilation module is used to model the stratigraphic units, drilling data and basic geological maps of the province at a scale of 1:500,000, and to push the cross-sections at an altitude of less than -2500 and an interval of 10 km, so as to cover the geological modeling area of ​​the province through a series of cross-sections;

[0047] The modeling block division module is used to divide the modeling area into different modeling blocks based on the fault system and the structural occurrence by using the pseudo-fault block method;

[0048] The structural modeling module is used to establish a three-dimensional geological body structure model of each modeling block by using the geological knowledge drive and geological element reasoning within the block, and complete the provincial-level 1:500,000 three-dimensional geological body framework modeling of the shallow -2500 meters above sea level;

[0049] The model coupling module is used to combine the three-dimensional geological body attribute modeling, couple the attribute model with the grid model, and form a three-dimensional geological body model integrating the grid and the attributes.

[0050] First, the modeling data is preprocessed. The modeling data preprocessing process is to convert the original one-dimensional (wells, holes) and two-dimensional (geological profiles, plane maps, and push-deep profiles shallower than -2500 meters above sea level, etc.) data of the province into three-dimensional data. Geological data from various sources are used in three-dimensional geological modeling as the data source for geological body modeling. Since the geological profile and plane map data are the results of interpretation by geologists, there may be certain differences in the three-dimensional space. It is necessary to deal with the interpretation conflicts in the data and use the processed data as the data source for geological body modeling.

[0051] Then encode the geological boundaries. According to the principle of boundary representation, the three-dimensional geological body model should be jointly expressed by all relevant boundaries and the spatial topological relationship between the boundaries. If you want to express the spatial relationship between geological units, the most important thing is the encoding method of each boundary surface, that is, according to the 1:500,000 stratigraphic system and all fault systems in the province, the boundary surface encoding and the topological relationship between other geological units are constructed. Therefore, before modeling the three-dimensional geological body, it is necessary to encode the data used for modeling to represent the contact relationship between the strata, and the contact relationship can be converted from the geological boundary to the geological interface. On the basis of the correct encoding of the stratigraphic age, a program can be written to allow the computer to automatically recognize the encoding of any stratigraphic interface segment.

[0052] The three-dimensional space is divided into blocks based on the pseudo-fault method. Since the blocks divided by the pseudo-fault block method strictly follow the constraints of the fault state, the constructed model naturally introduces the constraint structure, and at the same time realizes the collaborative modeling of ultra-large-scale modeling tasks, making provincial-level high-quality modeling possible. The pseudo-fault method is used to divide the space blocks, that is, the fault is extended to the boundary position according to the fault direction in space, and the area is divided together with the boundary. The extended part does not mean that there is a fault, that is, the fault distance is 0, but it is divided in space, which is used to partition the modeling data blocks in space, such as Figure 2 , 3 shown. Figure 2Three faults are developed in the middle area, namely faults F1, F2, and F3, which divide the entire study area into four areas (1, 2, 3, and 4). The fault information provided by the plane map, geological profile map, and drilling (well) data is used to simulate regional faults and mark real faults and pseudo-faults. The area is divided into four closed areas in three-dimensional space by real faults and pseudo-faults. Due to the existence of X-shaped and Y-shaped faults, it is not possible to simply divide the area on the plane. It is necessary to divide the space in three-dimensional space according to the interlacing of faults. The automatic division of fault blocks can be realized by combining the spatial binary tree (BSP tree). The divided blocks completely follow the occurrence of the faults, reflecting the contact relationship between the fault blocks, thereby integrating complex structural information into the model.

[0053] After the block is divided, geological knowledge-driven and geological element reasoning modeling are carried out in the block. The three-dimensional geological body framework modeling in the block is mainly to complete the interpolation fitting of the stratigraphic layers and sedimentary phase interfaces in the block. However, in the interpolation fitting process of each layer / interface, no matter which interpolation method is used, the stratigraphic layer model interpolated inside the block needs to consider the erosion of each layer in the block, the pinching out of the stratigraphic layer, and the upper and lower relationships with the stratigraphic layers of adjacent blocks. For example, the upper and lower plates of the normal faults are driven by geological knowledge and geological element reasoning modeling to complete the three-dimensional geological body framework modeling in the block, such as Figure 4 The three-dimensional geological body structure model of each modeling block is established by the modeling method driven by geological knowledge within the block and geological element reasoning. The three-dimensional geological body model of the block reflects the geological semantics such as stratum outcrop, stratum pinch-out, sedimentary phase boundary and sedimentary discontinuity.

[0054] Finally, attribute modeling is performed on the three-dimensional geological body. Attribute modeling of three-dimensional geological body refers to the interpolation of attribute fields using geostatistical methods or multi-point geostatistical methods for various attribute data, such as temperature, resistivity, porosity, etc., and finally coupling with the three-dimensional geological body framework model mentioned above to form a three-dimensional geological body model that integrates the framework and attributes.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A provincial-level 1:500,000 three-dimensional geological modeling method, characterized in that: The method comprises the following operations: Based on the provincial 1:500,000 vertical modeling stratigraphic units, drilling data and basic geological maps, cross sections with an interval of 10 km at an altitude of less than -2500 are pushed to cover the provincial geological modeling area through a series of cross sections; The pseudo-fault partitioning method is adopted. Based on the fault system, the modeling area is divided into different modeling blocks on the basis of following the structural occurrence. The pseudo-fault partitioning method is to extend the fault to the boundary position according to the fault trend in space, and divide the area together with the boundary. The extended part does not represent the existence of the fault, that is, the fault distance is 0, and it is only divided in space, which is used to partition the modeling data block in space. The three-dimensional geological structure model of each modeling block is established by using the geological knowledge driving and geological element reasoning within the block, and the three-dimensional geological framework modeling of the provincial level 1:500,000 altitude -2500 meters shallow is completed; Combined with 3D geological body attribute modeling, the attribute model is coupled with the grid model to form a 3D geological body model integrating the grid and attributes.

2. A provincial-level 1:500,000 three-dimensional geological modeling method according to claim 1, characterized in that: Before modeling, the modeling data needs to be encoded, and the boundary surface encoding and the topological relationship between other geological entities need to be completed based on the 1:500,000 stratigraphic system of the entire province and all fault systems.

3. A provincial-level 1:500,000 three-dimensional geological modeling method according to claim 1, characterized in that: The three-dimensional geological body structure model expresses the geological semantics of stratum outcrops, stratum pinch-outs, sedimentary phase boundaries and sedimentary discontinuities.

4. A provincial-level 1:500,000 three-dimensional geological modeling system, characterized in that: The system comprises: The modeling area compilation module is used to model the stratigraphic units, drilling data and basic geological maps of the province at a scale of 1:500,000, and to push the cross-sections at an altitude of less than -2500 and an interval of 10 km, so as to cover the geological modeling area of ​​the province through a series of cross-sections; The modeling block division module is used to divide the modeling area into different modeling blocks based on the fault system and the structural attitude by using the pseudo-fault division method; the pseudo-fault division method is to extend the fault to the boundary position according to the fault trend in space, and divide the area together with the boundary, wherein the extended part does not represent the existence of the fault, that is, the fault distance is 0, and it is only divided in space, and is used to partition the modeling data block in space; The structural modeling module is used to establish a three-dimensional geological body structure model of each modeling block by using the geological knowledge drive and geological element reasoning within the block, and complete the provincial-level 1:500,000 three-dimensional geological body framework modeling of the shallow -2500 meters above sea level; The model coupling module is used to combine the three-dimensional geological body attribute modeling, couple the attribute model with the grid model, and form a three-dimensional geological body model integrating the grid and the attributes.

5. A provincial-level 1:500,000 three-dimensional geological modeling system according to claim 4, characterized in that: Before modeling, the modeling data needs to be encoded, and the boundary surface encoding and the topological relationship between other geological entities need to be completed based on the 1:500,000 stratigraphic system of the entire province and all fault systems.

6. A provincial-level 1:500,000 three-dimensional geological modeling system according to claim 4, characterized in that: The three-dimensional geological body structure model expresses the geological semantics of stratum outcrops, stratum pinch-outs, sedimentary phase boundaries and sedimentary discontinuities.

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