CN109035411A - Three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation - Google Patents
Three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation Download PDFInfo
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Abstract
The present invention provides a kind of three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation, comprising: step 1, initial data needed for three-dimensional geological modeling is carried out data load and visualization；Step 2, stratum is restored to the ancient sedimentation state that tectonic activity period does not occur by bed boundary bearing calibration；Step 3, mesh generation is carried out to stratum using Corner-point Grids data model；Step 4, the interpolation fitting of fault plane is carried out；Step 5, the Corner-point Grids volume element model of ancient deposition period is adjusted using the fault information cutting in the tectonic movement period got.The three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation can eliminate the distortion of geologic grid in modeling process, save the volume and range information of simulated target body from damage, make the faithful to bad ground of geologic grid, accurate geological statistics are achieved, physical parameter and three-dimensional geological grid effective integration, model are more in line with geologic rule.
Description
Technical field
The present invention relates to oil gas three-dimensionals to construct modeling technique field, especially relates to a kind of three-dimensional based on forward simulation
Stratum Corner-point Grids the solid unit modeling method.
Background technique
The oil gas three-dimensional geological modeling software (Petrel, Direct etc.) of prevalence is constructing modeling Pillar both at home and abroad at present
During Gridding gridding, tomography is tied to by force in plane quadrilateral grid, i.e., by the mesh point of near fault lines
It is moved on fault line, so that certain Grid Edges therein is become tomography side, it is parallel with tomography that this requires grids, and grid is not
It can be cut off by tomography, so the three-dimensional geological grid generated in modeling process will generate distortion, lead to phase analog result
It is twisted, the physical parameters such as reservoir can not carry out effective integration with the grid of distortion.We have invented a kind of new bases thus
In the three-dimensional formation Corner-point Grids the solid unit modeling method of forward simulation, solves the above technical problem.
Summary of the invention
The object of the present invention is to provide it is a kind of overcome the problems, such as near Faults three-dimensional geological mesh distortion based on forward simulation
Three-dimensional formation Corner-point Grids the solid unit modeling method.
The purpose of the present invention can be achieved by the following technical measures: the three-dimensional formation Corner-point Grids body based on forward simulation
Meta Model method, the three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation of being somebody's turn to do includes: step 1, by three-dimensional geological
Initial data needed for modeling carries out data load and visualization；Step 2, stratum is restored to by bed boundary bearing calibration
The ancient sedimentation state in tectonic activity period does not occur；Step 3, mesh generation is carried out to stratum using Corner-point Grids data model；
Step 4, the interpolation fitting of fault plane is carried out；Step 5, ancient using the fault information cutting adjustment in the tectonic movement period got
The Corner-point Grids volume element model of deposition period, tomography are arbitrary the cutting of grid, and the place that all tomographies pass through, grid is just
It is cut into naturally according to turn-off and is staggered into two parts, be located at the upper disk and lower wall of tomography, to be restored to geologic body hair
The volume element model of raw post-rift time of day now.
The purpose of the present invention can be also achieved by the following technical measures:
In step 1, initial data needed for three-dimensional geological modeling is imported into modeling software system, realizes each geology
Object space three-dimensional visualization is shown.
In step 1, initial data needed for the three-dimensional geological modeling of importing includes layer position scatterplot data, tomography scatterplot number
According to work area data boundary.
In step 2, stratum is restored to the ancient deposition shape that tectonic activity period does not occur by the presence for not considering tomography
State is corrected the layer position scatterplot data of near Faults that is, by bed boundary bearing calibration.
In step 2, assume that footwall is not influenced by rift structure in correction course, and upper disk is moved because of rift structure
Certain deformation occurs, in recovery process, setting lower wall is motionless, moves up the layer position scatterplot number near dynamic hanging wall in section
According to until regarding the level scatterplot data of former tomography two sides as one continuously at this time with the layer position scatterplot data level near lower wall
Entirety carry out unified interpolation fitting processing, recover the bed boundary of ancient deposition period.
Step 3 includes:
Step a creates initial Corner-point Grids skeleton pattern:
Step b, level are inserted into skeleton pattern；
Step c, vertical subdivided meshes.
In step a, plane quadrilateral net is carried out to the top of bed succession, bottom surface data using Corner-point Grids data model
Lattice subdivision, plane net need to input the ranks spacing on work area boundary, the setting direction grid IJ and grid during formatting；By vertical
The angle point of the angle point of top surface control grid and bottom surface control grid is connected to coordinate line, to generate Yi Ding, four side of bottom
Shape grid face is the initial three-dimensional Corner-point Grids skeleton pattern of control plane.
In stepb, the intermediate surface scatterplot data by selection input are fitted to curved surface, are inserted into initial Corner-point Grids
Skeleton pattern is simultaneously found intersection with longitudinal coordinate line, and the intersection point between all longitudinal coordinate lines and level becomes the one of three-dimensional grid
A node completes the primary division on vertical to initial three-dimensional angle point skeleton lattice model.
In step c, accurate sequence model is established, formation thickness, sand layer thickness, mud stone are respectively covered according to work area every interlayer
Thickness and grid sum situation implement secondary vertical sub-dividing operations to the grid after primary divide, thus when tomography does not occur for formation
The subtle three-dimensional Corner-point Grids volume elements geological model of phase.
In step 4, tomography scatterplot data interpolating is fitted to according to mould by fault plane using irregular triangle network.
In steps of 5, using the thinking of forward modeling according to the displacement of tomography to the subtle three-dimensional Corner-point Grids body for being free of tomography
Meta-model carries out cutting process, and tomography is arbitrary the cutting of grid, and tomography will not pull grid angle point by force, all
The place that tomography passes through, grid is just cut into according to turn-off naturally is staggered into two parts, is located at the upper disk of tomography under
Disk will no longer be hexahedron Corner-point Grids by the Corner-point Grids that tomography is cut through, and can derive new irregular polyhedron network
Lattice, neighbouring other grid forms are unaffected, so that being restored to geologic body occurs post-rift time of day now
Volume element model.
The three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation in the present invention is related to stratum modeling and breaks
Layer modeling first deposits the forward simulation thinking constructed afterwards using by ancient opinion the present, i.e., does not consider the presence of tomography first, pass through ground
Stratum is restored to the ancient sedimentation state that tectonic activity period does not occur by bed boundary bearing calibration, and stratum is exactly according to time series
The rock stratum of the level of approximation slowly deposited；Then mesh generation is carried out to stratum using Corner-point Grids data model, is formed in this way
Hexahedral mesh avoid the interference of tomography, the configuration quality of grid is intact, and stratigraphic model at this time can be recognized
For the Corner-point Grids volume element model for being tectonic activity does not occur i.e. stably depositing period；When finally using the tectonic movement got
The fault information of phase removes the Corner-point Grids volume element model of the ancient deposition period of cutting adjustment, and tomography is arbitrary the cutting of grid,
The place that all tomographies pass through, grid are only staggered by turn-off along tomography and are divided into two, be not distorted, other grids
Quality form will not be affected, and thus by the stratigraphic model of ancient deposition period, forward modeling is disconnected to the generation of stratum now step by step
Time of day after splitting.This method overcomes geologic grid to be limited by tomography constraint, can eliminate geologic grid in modeling process
Distortion, save the volume and range information of simulated target body from damage, make the faithful to bad ground of geologic grid, accurate geological statistics obtain
To realize, physical parameter and three-dimensional geological grid effective integration, model are more in line with geologic rule.
Detailed description of the invention
Fig. 1 is a specific embodiment of the three-dimensional formation Corner-point Grids the solid unit modeling method of the invention based on forward simulation
Flow chart；
Fig. 2 is plane quadrilateral mesh generation schematic diagram in a specific embodiment of the invention；
Fig. 3 is the schematic diagram of initial Corner-point Grids skeleton in a specific embodiment of the invention；
Fig. 4 is that a specific embodiment interrupting layer of the invention arbitrarily cuts Corner-point Grids schematic diagram；
Fig. 5 is that a specific embodiment interrupting layer of the invention cuts grid plan schematic diagram；
Fig. 6 is that a specific embodiment interrupting layer of the invention cuts casting mesh schematic diagram.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate shown in attached drawing, it is described in detail below.
The stream for the three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation that as shown in FIG. 1, FIG. 1 is of the invention
Cheng Tu.
Step 101, data load and visualization: by initial data needed for three-dimensional geological modeling, (layer position scatterplot data are broken
Layer scatterplot data, work area data boundary) it imported into modeling software system, realize that confrontation image space three-dimensional visualization in various regions is aobvious
Show.
Step 102, the recovery of ancient sedimentary formation: do not consider the presence of tomography first, but first stratum is restored to and is not sent out
The ancient sedimentation state in raw tectonic activity period, i.e., by bed boundary bearing calibration, to the layer position scatterplot data of near Faults into
It goes and corrects, assume that footwall is not influenced by rift structure in correction course, and upper disk occurs centainly because of rift structure movement
Deformation, in recovery process, setting lower wall is motionless, moves up the layer position scatterplot data near dynamic hanging wall in section until under and
Layer position scatterplot data basic horizontal near disk regards the level scatterplot data of former tomography two sides as a continuous entirety at this time
Carry out unified interpolation fitting processing, so that it may which approximation recovers the bed boundary of ancient deposition period.
Step 103, top, bottom of the Corner-point Grids Grid data model to bed succession 1. Corner-point Grids volume elements subdivision: are used
Face data carries out plane quadrilateral mesh generation, and plane net needs to input work area boundary, the setting direction grid IJ during formatting
And the ranks spacing (such as Fig. 2) of grid；2. top surface is controlled the angle point of grid by longitudinal coordinate line and bottom surface controls grid
Angle point connects, thus generate Yi Ding, initial three-dimensional Corner-point Grids skeleton pattern that bottom quadrangle grid face is control plane (such as
Fig. 3)；3. other stratal surfaces other than top, bottom surface are inserted into initial scaffold grid model and longitudinal coordinate line is found intersection, institute
Intersection point between some longitudinal coordinate lines and level becomes a node of three-dimensional grid, to initial three-dimensional angle point skeleton lattice
Model completes the primary division on vertical；4. establishing accurate sequence model in order to more meticulously portray stratum characteristic, needing root
It is real to the grid after primary divide every thickness of interlayer and grid sum situation that formation thickness, sand layer thickness, mud stone are respectively covered according to work area
Secondary vertical sub-dividing operations are applied, to form the subtle three-dimensional Corner-point Grids volume elements geological model that tomography period does not occur.
Step 104, the interpolation fitting of fault plane: use irregular triangle network TIN data mould by tomography scatterplot data interpolating
It is fitted to fault plane.
Step 105, tomography cuts volume element model: using the thinking of forward modeling according to the displacement (turn-off) of tomography to without tomography
Subtle three-dimensional Corner-point Grids volume element model carry out cutting process, tomography is arbitrary the cutting of grid, and tomography will not
Grid angle point is pulled by force, the place that all tomographies pass through, grid is just cut into according to turn-off naturally is staggered into two parts, point
Not Wei Yu the upper disk and lower wall of tomography can be sent so will no longer be hexahedron Corner-point Grids by the Corner-point Grids that tomography is cut through
New irregular polyhedron grid (such as Fig. 4) is born, neighbouring other grid forms are unaffected (such as Fig. 5 and Fig. 6),
To be restored to the volume element model that post-rift time of day now occurs for geologic body.
Forward modeling thinking and hexahedron cutting method of the invention can eliminate the abnormal of geologic grid in modeling process
Become, saves the volume and range information of simulated target body from damage, model is made to be more in line with geologic rule.
Claims (11)
1. the three-dimensional formation Corner-point Grids the solid unit modeling method based on forward simulation, which is characterized in that should be based on forward simulation
Three-dimensional formation Corner-point Grids the solid unit modeling method includes:
Step 1, initial data needed for three-dimensional geological modeling is subjected to data load and visualization；
Step 2, stratum is restored to the ancient sedimentation state that tectonic activity period does not occur by bed boundary bearing calibration；
Step 3, mesh generation is carried out to stratum using Corner-point Grids data model；
Step 4, the interpolation fitting of fault plane is carried out；
Step 5, the Corner-point Grids volume elements of ancient deposition period is adjusted using the fault information cutting in the tectonic movement period got
Model.
2. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 1 based on forward simulation, feature exist
In in step 1, initial data needed for three-dimensional geological modeling is imported into modeling software system, realizes each geological object
Space three-dimensional visualization display.
3. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 2 based on forward simulation, feature exist
In, in step 1, initial data needed for the three-dimensional geological modeling of importing include layer position scatterplot data, tomography scatterplot data and
Work area data boundary.
4. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 1 based on forward simulation, feature exist
In, in step 2, do not consider the presence of tomography, stratum is restored to the ancient sedimentation state that tectonic activity period does not occur, i.e., it is logical
Bed boundary bearing calibration is crossed, the layer position scatterplot data of near Faults are corrected.
5. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 4 based on forward simulation, feature exist
In, assume that footwall is not influenced by rift structure in step 2, in correction course, and upper disk occurs because rift structure moves
Certain deformation, in recovery process, setting lower wall is motionless, and it is straight to move up the layer position scatterplot data near dynamic hanging wall in section
To and lower wall near layer position scatterplot data level, at this time by the level scatterplot data of former tomography two sides regard as one continuously it is whole
Body carries out unified interpolation fitting processing, recovers the bed boundary of ancient deposition period.
6. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 1 based on forward simulation, feature exist
In,
Step 3 includes:
Step a creates initial Corner-point Grids skeleton pattern:
Step b, level are inserted into skeleton pattern；
Step c, vertical subdivided meshes.
7. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 6 based on forward simulation, feature exist
In carrying out plane quadrilateral grid to the top of bed succession, bottom surface data using Corner-point Grids data model and cut open in step a
Point, plane net needs to input the ranks spacing on work area boundary, the setting direction grid IJ and grid during formatting；Pass through longitudinal seat
Graticule connects the angle point of the angle point of top surface control grid and bottom surface control grid, to generate Yi Ding, bottom quadrangle lattice
Wire side is the initial three-dimensional Corner-point Grids skeleton pattern of control plane.
8. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 6 based on forward simulation, feature exist
In, in stepb, will selection input intermediate surface scatterplot data be fitted to curved surface, be inserted into initial Corner-point Grids skeleton
Model is simultaneously found intersection with longitudinal coordinate line, and the intersection point between all longitudinal coordinate lines and level becomes a section of three-dimensional grid
Point completes the primary division on vertical to initial three-dimensional angle point skeleton lattice model.
9. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 6 based on forward simulation, feature exist
In in step c, establishing accurate sequence model, formation thickness, sand layer thickness, mud stone respectively covered according to work area every thickness of interlayer
And grid sum situation implements secondary vertical sub-dividing operations to the grid after primary divide, and tomography period does not occur to be formed
Subtle three-dimensional Corner-point Grids volume elements geological model.
10. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 1 based on forward simulation, feature exist
In in step 4, tomography scatterplot data interpolating being fitted to fault plane according to mould using irregular triangle network.
11. the three-dimensional formation Corner-point Grids the solid unit modeling method according to claim 1 based on forward simulation, feature exist
In in steps of 5, using the thinking of forward modeling according to the displacement of tomography to the subtle three-dimensional Corner-point Grids volume element model for being free of tomography
Cutting process is carried out, tomography is arbitrary the cutting of grid, and tomography will not pull grid angle point by force, and all tomographies are worn
The place crossed, grid is just cut into according to turn-off naturally is staggered into two parts, is located at the upper disk and lower wall of tomography, is broken
The Corner-point Grids that layer is cut through will no longer be hexahedron Corner-point Grids, can derive new irregular polyhedron grid, near
Other grid forms be unaffected, to be restored to the volume elements mould that post-rift time of day now occurs for geologic body
Type.
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| CN110060342A (en) * | 2019-02-22 | 2019-07-26 | 中铁工程设计咨询集团有限公司 | A kind of three-dimension curved surface approximating method |
| CN111624674A (en) * | 2020-06-09 | 2020-09-04 | 中国地质大学（北京） | Simulation system for evolution of deposition sequence formation |
| CN111815769A (en) * | 2019-04-12 | 2020-10-23 | 中国石油天然气股份有限公司 | Modeling method, computing device and storage medium for thrust-driven tectonic belt structure |
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| CN114882185A (en) * | 2022-05-06 | 2022-08-09 | 天津大学 | Fault uncertainty form modeling method based on mixed density neural network |
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