CN114972667A

CN114972667A - Three-dimensional geological modeling method based on GOCAD

Info

Publication number: CN114972667A
Application number: CN202210597230.5A
Authority: CN
Inventors: 陈小艳; 姚多喜; 孙明
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-08-30

Abstract

The invention relates to a three-dimensional geological modeling method based on GOCAD, which comprises the following steps: 1) finishing AutoCAD data; 2) importing data; 3) generating a surface by Wizards; 4) constructing a side surface of the model; 5) and (5) constructing a grid model. The invention can realize the mode of extracting data from AutoCAD and then simply modeling through GOCAD, and provides a simple and quick operation mode for users, thereby saving time and improving efficiency.

Description

Three-dimensional geological modeling method based on GOCAD

Technical Field

The invention relates to a three-dimensional geological modeling method based on GOCAD.

Background

With the development of science and technology, the traditional two-dimensional modeling can not meet the engineering requirements, and the three-dimensional modeling becomes important simulation software of a new era, such as GOCAD, FLAC3D, MATLAB, GIS and the like. Jialong, etc. in the three-dimensional geological modeling research based on GOCAD, takes a certain mining area in the southwest of China as an example, and combines the basic theory and method of three-dimensional geological modeling to induce the basic flow of three-dimensional geological modeling; in order to research and observe a certain uranium ore reservoir area in the Ordos basin in the three-dimensional geological modeling visualization process based on GOCAD software, Van Wen remote and the like adopt the GOCAD software to perform geological three-dimensional modeling simulation and visualization operation process on the research area; the three-dimensional geological modeling process of the GOCAD is briefly described from different aspects, which also illustrates the importance of the GOCAD in the three-dimensional modeling;

modeling advantages of godad: 1) the modeling function is strong: the complex three-dimensional geological model can be simply and quickly established, namely, the surface model and the solid model can be established; 2) the interface is friendly: the interface is detailed and easy to understand, and is friendly to beginners; 3) the functions are complete: the modeling processes such as structural model modeling, three-dimensional geological model grid modeling, reservoir attribute modeling and the like are provided for a user, the operation is convenient and quick, and the operation can be completed only by steps; 4) the range should be wide: the method is not only suitable for geological engineering, but also suitable for the subject fields of geotechnical engineering, geographic information, technology and the like.

The noun explains:

GOCAD software: GOCAD (geological Object Computer Aided design) geological modeling software is three-dimensional visual modeling software developed by the university of Nancy, France and mainly applied to the geological field. The GOCAD software has powerful functions of three-dimensional modeling, visualization, geological interpretation and analysis. Surface modeling can be carried out so as to carry out solid modeling; spatial geometric objects can be designed, and spatial attribute distribution can be expressed.

Discrete smooth interpolation technique (DSI): DSI is the core technology of GOCAD three-dimensional geological modeling software, and the DSI method has more advantages, such as freely selecting a grid model, automatically adjusting the grid model, performing real-time interactive operation, processing some uncertain data and the like, and the advantages of DSI determine the important role of the DSI in three-dimensional geological modeling.

Disclosure of Invention

The invention aims to provide a three-dimensional geological modeling method based on GOCAD, and the modeling method can effectively process AuToCAD data.

The purpose of the invention can be realized by the following technical scheme:

a three-dimensional geological modeling method based on GOCAD is characterized by comprising the following steps:

1) finishing AutoCAD data;

2) importing data;

3) generating a surface by Wizards;

4) construction of model side faces

5) Constructing a grid model;

the principle of the AutoCAD data arrangement in the step 1) is as follows: data sorting is the basis of GOCAD modeling, and how to sort out data useful for modeling from AutoCAD analysis is a key technology of modeling;

the imported data in the step 2): running GOCAD, selecting File → Import Object → AutoCAD (DFX files) and importing the sorted contour line data;

generating a surface by Wizards in the step 3): selecting Wizards → Surface Creation → From Data (without internal border) to build a face, and improving the face building accuracy;

constructing the side face of the model in the step 4): selecting surface mode → new → built applications → tube to generate a side;

the step 5) of constructing the grid model comprises the following steps: establishing a three-dimensional geological model by using workflow → 3D Reservor Grid Builder;

compared with the prior art, the invention has the following advantages:

in the method for optimizing the model by the GOCAD, factors of all aspects are fully considered, and the content has certain guiding significance on the aspects of the modeling method and the like;

drawings

FIG. 1 is a schematic diagram of a wizard generation interface according to an embodiment of the present invention

FIG. 2 is a three-dimensional geological grid model building method according to an embodiment of the present invention

FIG. 3 is a grid model according to an embodiment of the present invention

Detailed Description

The present invention will be described in detail with reference to specific examples

Specific example applications

the method comprises the following steps: AutoCAD data collation

Data sorting is the basis of GOCAD modeling, and how to sort out data useful for modeling from AutoCAD analysis is a key technology of modeling;

further, according to the topographic characteristics of modeling, considering the influence of factors such as landslide and faults, and marking a range required by modeling in the whole graph;

furthermore, line data outside the modeling area is built by using a trimming command of the CAD, and data within the modeling area is reserved, so that contour lines in the modeling area can be extracted;

further, extracting a modeling area, adjusting a modeling angle, storing the sorted data as a. dxf format, and importing the data into GOCAD in the dxf format;

step two: importing data

Running GOCAD, selecting File → Import Object → AutoCAD (DFX files) and importing the sorted contour line data;

further, the line data is Curve in GOCAD, and then a point set is made through pointSet → From pointSet Curve or Surface;

step three: generation of noodles by Wizards

Selecting Wizards → Surface Creation → From Data (without internal border) to build Surface,

furthermore, clicking the raw outer curved from points and the optional outer curved top points, and simultaneously clicking the spiral button on the right side for multiple times, wherein the optimization is carried out for multiple times by using a discrete smooth interpolation technology (DSI) until the optimal effect is achieved;

furthermore, clicking the create Surface to generate a Surface, and hide the curved Surface which is not needed to be seen by hide constraints on Surface;

step four: construction of the sides of the model

Selecting surface mode → new → built applications → tube to generate a side;

furthermore, a value X, Y, Z needed by a user is typed in the expansion, if a vertical side is needed, only the Z value is modified, and meanwhile, two ways are selected to extend from the positive direction and the negative direction, and the seal ends are selected;

step five: mesh model construction

Establishing a stratum model by using workflow → 3D Reservor Grid Builder;

further, a top surface and a bottom surface are respectively arranged, a grid direction and a grid range can be set, and the next step of default clicking is accepted;

furthermore, the triangular curved surface is set to be used in three modes, namely automatic mode, interactive mode and established mode, the interactive mode is generally selected, and the next step is clicked;

furthermore, the connection between the top surface and the bottom surface is set, the automatic calculation icon is clicked, and other keys can be selected to modify the position with dissatisfaction; clicking a deleting icon, clicking a connecting line in the 3D display area, and deleting a single connecting line; selecting an adding icon, clicking the top surface boundary in the 3D display area, and then clicking the bottom surface boundary to establish a new connection; after satisfaction, the next step is carried out;

further, there are three ways to set the plane grid direction: parallel to X, Y direction, parallel to the outer boundary, defining vector direction (an angle value can be directly input or an arrow can be clicked by a mouse to draw a vector direction in the 3D area), selecting according to the requirement, and then clicking the next step;

further, if a fault exists, enabling grid lines to be distributed according to the trend of the fault, clicking the trend of the automatic distribution grid, and finishing the next step of clicking;

according to a defined geological sequence, establishing an intermediate layer (referring to a method for establishing the intermediate layer in structural modeling) by using well layering, and clicking the next step after establishing;

further, setting a grid direction in the longitudinal direction, defining the grid number between layers in the longitudinal direction, inputting a proper value, and clicking the next step;

further, defining the number of grids on a plane, defining the number of grids in the plane direction, inputting different Grid numbers in the I, J direction, clicking a Create Grid icon, establishing a three-dimensional geological Grid, clicking the next step to finish, and storing the constructed model;

the above example is only a simple example, and the reader may choose other suitable methods according to the needs.

Claims

1. A three-dimensional geological modeling method based on GOCAD is characterized by comprising the following steps:

1) finishing AutoCAD data;

2) importing data;

3) generating a surface by Wizards;

4) constructing a side surface of the model;

5) and (5) constructing a grid model.

2. The three-dimensional geological modeling method based on godad according to claim 1, wherein the AutoCAD data is sorted in step 1), and the method is characterized in that: data sorting is the basis of GOCAD modeling, and how to sort out data useful for modeling from AutoCAD analysis is a key technology of modeling.

3. The three-dimensional geological modeling method based on godad according to claim 1, wherein the step 2) imports data, and the method is characterized in that: running GOCAD, selecting File → Import Object → AutoCAD (DFX files) and importing the sorted contour data.

4. The method according to claim 1, wherein the step 3) utilizes a point construction surface, and is characterized in that: the Wizards → Surface Creation → From Data (without internal border) is selected to build the Surface, and the Surface building accuracy is improved.

5. The method for three-dimensional geological modeling based on GOCAD as claimed in claim 1, wherein in step 4) the model side is constructed, wherein: surface mode → new → built applications → tube is selected to generate a side.

6. The method for three-dimensional geological modeling based on GOCAD as claimed in claim 1, wherein said step 5) of constructing a grid model comprises: the three-dimensional geological model is built using workflow → 3D Reservor Grid Builder.