CN111383336A - Three-dimensional geological model construction method - Google Patents
Three-dimensional geological model construction method Download PDFInfo
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Abstract
The invention discloses a three-dimensional geological model construction method applied to a alluvial plain city area, which comprises the following steps: aiming at different three-dimensional geological model construction areas, constructing an initial stratum interface by using the acquired drilling point data; smoothing the constructed stratum interface by using a geometric self-adaptive method to generate a constructed stratum interface; constructing a three-dimensional stratum entity by using the constructed stratum interface; and integrating the generated three-dimensional geological entity and the constructed geological interface to generate a three-dimensional geological model. The method can accurately establish the three-dimensional stratum interface, increases the point density in a region with sparse drilling point data by adopting a data interpolation method, and generates a smooth three-dimensional geological model which accords with the actual situation by combining the geometric distortion generated in the data interpolation process of the discrete smooth interpolation correction.
Description
Technical Field
The invention relates to the technical field of geographic information systems, in particular to a three-dimensional geological model construction method applied to a alluvial plain city area.
Background
Alluvial plains are plain relief formed by river sedimentation. The water flow is not as rapid as the upstream of the river downstream, and a large amount of silt is eroded from the upstream to the downstream, and the flow rate is not enough to carry the silt, so that the silt is deposited downstream. Especially when the river is immersed in water, silt is deposited on both banks of the river, and alluvial plains are gradually formed. At present, the construction of geological models for urban areas formed by alluvial plains is urgent.
However, the inventor finds that geological information is numerous, and in the face of a large amount of two-dimensional map data, ordinary geologists are difficult to comprehensively and accurately understand the overall geological condition, and difficulty and errors are inevitably brought to engineering design and construction. Furthermore, geological information and phenomena are three-dimensional in nature, and it is necessary to resort to three-dimensional geological modeling and visualization to more intuitively analyze and solve real geological problems.
The three-dimensional geological model is based on various original data, including drilling holes, sections, seismic data, isobolograms, geological maps, topographic maps, geophysical prospecting data, chemical prospecting data, engineering prospecting data, hydrologic monitoring data and the like, and is used for establishing a digital model capable of reflecting geological structure forms, structural relations and geological body internal attribute change rules. Through a proper visualization party, the digital model can show a virtual real geological environment, and can assist a user in making scientific decisions and avoiding risks based on numerical simulation and spatial analysis of the model.
Disclosure of Invention
Based on the above, in order to solve the technical problems in the prior art, a three-dimensional geological model construction method is provided, and comprises the following steps:
step 1, aiming at different three-dimensional geological model construction areas, constructing an initial stratum interface by using the acquired drilling point data;
and 4, integrating and generating a three-dimensional geological model by using the generated three-dimensional geological entity and the constructed geological interface.
In one embodiment, aiming at a three-dimensional geological model construction area with small area and simple stratum condition, a drilling model is established according to drilling point data, and then stratum interfaces are generated by utilizing the interconnection of layered marking data in the drilling model;
aiming at a large-area three-dimensional geological model construction area under the stratum condition, firstly, a good layer interface is divided manually, then, a grid is generated by utilizing drilling point data of the divided stratum interface, and in the area with large fluctuation of the stratum interface and less drilling quantity, the original drilling point density is increased by adopting a data interpolation method, so that the density of the generated grid is increased.
In one embodiment, the data interpolation method adopts a Coriolis interpolation method or an inverse distance ratio weighting interpolation method;
extracting elevation data according to stratigraphic layering information of the drilling points, and generating an original drilling point distribution diagram; and performing data interpolation on the original drilling point distribution map to generate an encrypted drilling point distribution map.
In one embodiment, an initial boundary line of the formation is determined using the initial borehole point; converting the stratum initial boundary into a fuzzy control point, and leading out an interpolation direction of discrete smooth interpolation; and carrying out discrete smooth interpolation processing on the selected interpolation direction by using the fuzzy control point, and correcting geometric distortion generated by data interpolation by using the discrete smooth interpolation so as to generate a smooth stratum interface.
In one embodiment, an intersection is obtained at the extinction, deletion of the formation tip; and forming a triangular gridded stratum interface, optimizing each initial stratum interface by using a discrete smooth interpolation algorithm, and modifying the pinch-out and missing stratum interfaces of the initial stratum by using intersection line constraint so as to construct and generate a final stratum interface.
In one embodiment, the intersection of the constructed upper stratum interface and the lower stratum interface is used as an intersection line, and a three-dimensional stratum entity with a grid is generated.
The embodiment of the invention has the following beneficial effects:
the method can accurately establish the three-dimensional stratum interface, increases the point density in a region with sparse drilling point data by adopting a data interpolation method, and generates a smooth three-dimensional geological model which accords with the actual situation by combining the geometric distortion generated in the data interpolation process of the discrete smooth interpolation correction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a flow chart of a three-dimensional geological model construction method disclosed by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In urban geological research, the three-dimensional geological model can assist in researching the distribution rule of underground stratum distribution and fracture structure in an urban area. The three-dimensional geological model is combined, urban area construction planning can be assisted, under the premise of researching underground water resource conditions and potential geological disaster risks, urban area underground space is reasonably developed and utilized, underground water resources are exploited, adverse geological conditions are avoided, and urban functional divisions are scientifically arranged.
Before the three-dimensional geological model is constructed, spatial data processing is carried out, namely, original geological data are processed and converted into a data format required by three-dimensional geological modeling, and a foundation is laid for the three-dimensional geological modeling. Therefore, the original data obtained by technical means such as surface geological survey, remote sensing, seismic survey, photogrammetry and the like are preprocessed, then the work of compiling all effective data is completed through 2DGIS, CAD and other auxiliary software, meanwhile, the complex strata, ore bodies and geological structures are identified, explained, described, positioned and the like, and finally all the effective compiled data are changed into an acceptable input data format for three-dimensional geological modeling through a data conversion interface, so that the fusion of geological data is realized, and the accuracy of geological body space geometric shape expression and the consistency of relationship description among various complex space objects are ensured.
The invention discloses a three-dimensional geological model construction method applied to a alluvial plain city area, which comprises the following steps:
step 1, aiming at different three-dimensional geological model construction areas, constructing an initial stratum interface by using the acquired drilling point data;
specifically, aiming at a three-dimensional geological model construction area with a small area and simple stratum conditions, firstly, a drilling model is established, and then, stratum interfaces are generated by utilizing the interconnection of layered marking data in the drilling model;
aiming at a large-area three-dimensional geological model construction area under the stratum condition, firstly, manually dividing a good layer interface, then generating a grid by using drilling point data of the divided stratum interface, and increasing the original drilling point density in the area with large fluctuation of the stratum interface and less drilling quantity by adopting a data interpolation method so as to increase the density of the generated grid;
wherein, the data interpolation method adopts a Coriolis (Kriging) interpolation method or a distance inverse ratio weighting interpolation method;
specifically, according to stratigraphic layering information of a drilling point, extracting elevation data so as to generate an original drilling point distribution diagram; performing data interpolation on the original drilling point distribution map to generate an encrypted drilling point distribution map;
the distance inverse ratio weighting interpolation method is a simpler and more convenient interpolation method, has high calculation speed and efficiency, small required storage space and high model building speed;
the Coriolis interpolation method is used for carrying out structural analysis on the space field while calculating, and data obtained by interpolation has high accuracy;
specifically, an initial boundary line of the stratum is determined by using an initial drilling point; converting the stratum initial boundary into a fuzzy control point, and leading out an interpolation direction of discrete smooth interpolation; carrying out discrete smooth interpolation processing on the selected interpolation direction by using the fuzzy control point, and correcting geometric distortion generated by data interpolation by using the discrete smooth interpolation to generate a smooth stratum interface;
the method for correcting the geometric distortion generated by the Coriolis interpolation by using the discrete smooth interpolation is a geometric self-adaptive method;
specifically, intersecting lines are obtained at the positions of pinch-out and deletion of the stratum; forming a triangular gridded stratum interface, optimizing each initial stratum interface by using a discrete smooth interpolation algorithm, and modifying the pinch-out and missing stratum interfaces of the initial stratum by using intersection line constraint so as to construct and finish a final stratum interface;
specifically, the intersection of the upper stratum interface and the lower stratum interface is used as an intersection line, and a three-dimensional stratum entity with a grid is generated;
and 4, integrating and generating a three-dimensional geological model by using the generated three-dimensional geological entity and the constructed geological interface.
And after the construction of the three-dimensional geological model is completed, applying the three-dimensional geological model. The model application mainly comprises attribute modeling, spatial data analysis, statistics, query and the like. The attribute model reflects the attribute characteristics of the geologic body, such as the grade distribution in an ore deposit, the oil, gas, water and pressure distribution in an oil storage structure, the water-rich property, the quality level and the like. The diversity of the spatial geological data provides rich information for spatial data analysis and query, and the spatial data analysis mainly comprises trend surface analysis, gradient calculation, section calculation, contour analysis, spatial statistical analysis and the like; a hierarchical query structure of spatial data query, data warehouse query and query output can be realized based on data mining and a knowledge base, and spatial geological data can be effectively described, organized, managed and utilized.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (6)
1. A method for constructing a three-dimensional geological model, comprising:
step 1, aiming at different three-dimensional geological model construction areas, constructing an initial stratum interface by using the acquired drilling point data;
step 2, smoothing the constructed stratum interface by using a geometric self-adaptive method to generate a constructed stratum interface;
step 3, constructing a three-dimensional stratum entity by using the constructed stratum interface;
and 4, integrating and generating a three-dimensional geological model by using the generated three-dimensional geological entity and the constructed geological interface.
2. The method of constructing a three-dimensional geological model according to claim 1,
aiming at a three-dimensional geological model construction area with small area and simple stratum condition, firstly establishing a drilling model according to drilling point data, and then utilizing layered marking data in the drilling model to be connected with each other to generate a stratum interface;
aiming at a large-area three-dimensional geological model construction area under the stratum condition, firstly, a good layer interface is divided manually, then, a grid is generated by utilizing drilling point data of the divided stratum interface, and in the area with large fluctuation of the stratum interface and less drilling quantity, the original drilling point density is increased by adopting a data interpolation method, so that the density of the generated grid is increased.
3. The method of constructing a three-dimensional geological model according to claim 2,
wherein, the data interpolation method adopts a Coriolis interpolation method or a distance inverse ratio weighting interpolation method;
extracting elevation data according to stratigraphic layering information of the drilling points, and generating an original drilling point distribution diagram; and performing data interpolation on the original drilling point distribution map to generate an encrypted drilling point distribution map.
4. The three-dimensional geological model construction method according to claim 3,
determining an initial boundary line of the stratum by using an initial drilling point; converting the stratum initial boundary into a fuzzy control point, and leading out an interpolation direction of discrete smooth interpolation; and carrying out discrete smooth interpolation processing on the selected interpolation direction by using the fuzzy control point, and correcting geometric distortion generated by data interpolation by using the discrete smooth interpolation so as to generate a smooth stratum interface.
5. The method of constructing a three-dimensional geological model according to claim 4,
obtaining an intersection line at the extinction and deletion positions of the stratum tips; and forming a triangular gridded stratum interface, optimizing each initial stratum interface by using a discrete smooth interpolation algorithm, and modifying the pinch-out and missing stratum interfaces of the initial stratum by using intersection line constraint so as to construct and generate a final stratum interface.
6. The method of constructing a three-dimensional geological model according to claim 1,
and taking the layer intersection of the constructed upper stratum interface and the lower stratum interface as an intersection line, and generating a three-dimensional stratum entity with grids.
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Cited By (7)
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| CN112233239A (en) * | 2020-10-29 | 2021-01-15 | 中国科学院地质与地球物理研究所 | Visual evaluation method and system based on dynamic three-dimensional modeling feedback |
| CN112419500A (en) * | 2020-12-09 | 2021-02-26 | 上海申元岩土工程有限公司 | Three-dimensional geological model modeling method |
| CN112800518A (en) * | 2021-01-25 | 2021-05-14 | 中国地质大学（武汉） | Stratum surface model correction method utilizing adjacent stratum cross-correlation constraint |
| CN112862967A (en) * | 2021-03-11 | 2021-05-28 | 北京市水利规划设计研究院 | Method and apparatus for building three-dimensional geological models |
| CN113269879A (en) * | 2021-05-27 | 2021-08-17 | 广东省地震局 | Automatic construction method and device for three-dimensional model of geologic body |
| CN113409463A (en) * | 2021-06-29 | 2021-09-17 | 中国地质大学（武汉） | Three-dimensional geological model construction method and device including pinch-out treatment |
| CN114820969A (en) * | 2022-04-21 | 2022-07-29 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Three-dimensional geological model construction method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233239A (en) * | 2020-10-29 | 2021-01-15 | 中国科学院地质与地球物理研究所 | Visual evaluation method and system based on dynamic three-dimensional modeling feedback |
| CN112233239B (en) * | 2020-10-29 | 2023-04-11 | 中国科学院地质与地球物理研究所 | Visual evaluation method and system based on dynamic three-dimensional modeling feedback |
| CN112419500A (en) * | 2020-12-09 | 2021-02-26 | 上海申元岩土工程有限公司 | Three-dimensional geological model modeling method |
| CN112419500B (en) * | 2020-12-09 | 2023-03-14 | 上海申元岩土工程有限公司 | Three-dimensional geological model modeling method |
| CN112800518A (en) * | 2021-01-25 | 2021-05-14 | 中国地质大学（武汉） | Stratum surface model correction method utilizing adjacent stratum cross-correlation constraint |
| CN112800518B (en) * | 2021-01-25 | 2022-04-12 | 中国地质大学（武汉） | Stratum surface model correction method utilizing adjacent stratum cross-correlation constraint |
| CN112862967A (en) * | 2021-03-11 | 2021-05-28 | 北京市水利规划设计研究院 | Method and apparatus for building three-dimensional geological models |
| CN113269879A (en) * | 2021-05-27 | 2021-08-17 | 广东省地震局 | Automatic construction method and device for three-dimensional model of geologic body |
| CN113269879B (en) * | 2021-05-27 | 2021-11-26 | 广东省地震局 | Automatic construction method and device for three-dimensional model of geologic body |
| CN113409463A (en) * | 2021-06-29 | 2021-09-17 | 中国地质大学（武汉） | Three-dimensional geological model construction method and device including pinch-out treatment |
| CN113409463B (en) * | 2021-06-29 | 2022-06-07 | 中国地质大学（武汉） | Three-dimensional geological model construction method and device including pinch-out treatment |
| CN114820969A (en) * | 2022-04-21 | 2022-07-29 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Three-dimensional geological model construction method |
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