CN109255835A - Shale core scale number-experimental model reconstructing method and device - Google Patents
Shale core scale number-experimental model reconstructing method and device Download PDFInfo
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Abstract
The present embodiments relate to the reconstructing methods and device of a kind of shale core scale number-experimental model, comprising: obtains the shale of rock specimens vertical EDS picture and SEM picture；The two-dimension picture in typical stratification inner inorganic hole, organic hole and microcrack is extracted from SEM picture；The 3-dimensional digital rock core in organic hole is reconstructed according to the two-dimension picture in organic hole；The 3-dimensional digital rock core of inorganic hole and microcrack is reconstructed according to the two-dimension picture in inorganic hole and microcrack；Each stratification internal mineral distributed intelligence is extracted from EDS picture, and reconstructs the three-dimensional structure of every layer of internal mineral matter；According to the 3-dimensional digital rock core of the three-dimensional structure of every layer of minerals, You Jikong, inorganic hole and microcrack, superposition obtains every layer of multiple dimensioned digital cores；It is constraint according to the permeability in vertical stratification direction, determines the tortuosity in inorganic hole；According to the distributed intelligence of adjacent layer minerals, the distributed intelligence of stratification seam is determined；It is constraint according to the permeability along stratification direction, determines the tortuosity of stratification seam；Number-experiment rock core of rock core scale is obtained again.
Description
Technical field
The present embodiments relate to field of petroleum exploitation more particularly to a kind of shale core scale number-experimental models
Reconstructing method and device.
Background technique
Different from conventional reservoir, shale reservoir has heterogeneity strong, and effecive porosity is low, and permeability is extremely low, respectively to different
Obvious, the extremely complex feature of pore structure of property.Currently, shale reservoir evaluation still face many problems, wherein key difficulties it
One is exactly unclear to the understanding of hole (seam) structure.Shale hole (seam) structure has very strong heterogencity, different blocks
With pore-size distribution, pore morphology, Kerogen type and the abundance, mineralogical composition and its distribution of different layers position shale etc. thousand poor ten thousand
Not.By scanning electron microscope image it can also be seen that being dispersed with a plurality of types of holes and microcrack, scale inside shale
Across six to seven orders of magnitude, based on nano-pore.The pore structure of shale greatly influences the percolation ability of reservoir and preserves
Ability furthers investigate the pore structure of shale, realizes the fine characterization of multiple dimensioned interstitial space, can be pre- for High-quality Reservoir
It surveys and the evaluation of the amount of adopting of shale gas provides scientific basis, there is highly important reality and war to the exploration and development of shale gas
Slightly meaning.
Digital cores technology is the important means of reservoir pore space three-dimensional structure characterization, but digital cores modeling technique at present
More hole (seam) the structure building concentrated on to single scale, can not be fully described by the biggish hole knot of change in size range
Structure.Shale hole (seam) scale is across six to seven orders of magnitude, interconnected nanoscale pore throat, micron order hole, microcrack
Net, man-made fracture provide migration pathway for shale gas, therefore must carry out evaluating reservoir in order to effective, it would be desirable to shale hole
Gap (seam) structure is carried out across scale, continuous characterization with the multiple dimensioned hole crack structure of meticulous depiction and its connectivity.Meanwhile vertical stratification
Obviously, stratification seam development be shale samples characteristic feature, and cause shale permeability anisotropy (it is vertical with along stratification side
To permeability differ nearly ten times) basic reason.Shale bed plane upper and lower level mineralogical composition differs greatly, research shows that mineral
The development for directly controlling microscopic void and construction, gas-bearing property and reservoir physical to shale have great influence.
Therefore, when characterizing shale hole (seam) structure feature, need to comprehensively consider texture feature and each layer mineral
The difference of distribution is lacked suitable for shale containing texture feature however, existing with to characterize hole (seam) structure feature of each layer
Across scale (nano-micrometre-centimetre) digital cores modeling scheme, to realize the complete characterization in hole (seam) space.
Summary of the invention
It, can be with the embodiment of the invention provides the reconstructing method and device of a kind of shale core scale number-experimental model
Digital cores across scale of the building containing texture feature are realized, to realize the complete characterization in hole (seam) space.
In a first aspect, the embodiment of the present invention provides a kind of reconstructing method of shale core scale number-experimental model, packet
It includes:
Obtain the shale of rock specimens vertical EDS picture and SEM picture；
The two-dimension picture in typical stratification inner inorganic hole and organic hole is extracted from the SEM picture；
The 3-dimensional digital rock core in organic hole is reconstructed according to the two-dimension picture in organic hole；
The 3-dimensional digital rock core of inorganic hole and microcrack is reconstructed according to the two-dimension picture in the inorganic hole；
Each stratification internal mineral distributed intelligence is extracted from the EDS picture, and reconstructs the three of every layer of internal mineral matter
Tie up structure；
According to the three-dimensional structure of every layer of minerals, three dimensions of the 3-dimensional digital rock core in organic hole and inorganic hole and microcrack
Word rock core, superposition obtain every layer of multiple dimensioned digital cores；
According to the distributed intelligence of adjacent layer minerals, the distributed intelligence of stratification seam is determined；
It is constraint according to the permeability in vertical stratification direction, determines the tortuosity in inorganic hole；
It is constraint according to the permeability along stratification direction, determines the tortuosity of stratification seam；
The multiple dimensioned digital cores of each layer and experiment rock core are overlapped according to the distributed intelligence and the tortuosity,
Obtain number-experiment rock core of rock core scale.
In a possible embodiment, the shale for obtaining rock specimens vertical EDS picture and SEM picture,
Include:
Shale rock sample is scanned using X-ray energy spectrometer, obtains the vertical EDS picture of the shale of rock specimens；
Shale rock sample is scanned using scanning electron microscope, obtains the vertical SEM picture of the shale of rock specimens.
In a possible embodiment, the method also includes:
Using the experiment of multifunctional pulse damping gas permeability measure shale rock sample at various pressures along stratification direction and
The permeability in vertical stratification direction is tested using N2 adsorption and obtains the distribution of shale pore radius.
In a possible embodiment, had according to the two-dimension picture in organic hole using the reconstruct of CSIM-TSS method
The 3-dimensional digital rock core in machine hole；
Inorganic hole and microcrack are reconstructed using Stochastic Analysis Method according to the two-dimension picture of the inorganic hole and microcrack
3-dimensional digital rock core.
In a possible embodiment, it is combined using CCSIM-TSS method and Stochastic Analysis Method, reconstructs every layer
The three-dimensional structure of internal mineral matter.
Second aspect, the embodiment of the present invention provide a kind of reconstruct device of shale core scale number-experimental model, packet
It includes:
Module is obtained, the shale for obtaining rock specimens vertical EDS picture and SEM picture；
Extraction module, for extracting the two dimension in typical stratification inner inorganic hole, microcrack and organic hole from the SEM picture
Picture；
Reconstructed module, for reconstructing the 3-dimensional digital rock core in organic hole according to the two-dimension picture in organic hole；According to institute
State inorganic hole, the two-dimension picture of microcrack reconstructs inorganic hole and the 3-dimensional digital rock core of microcrack；
The extraction module is also used to extract each stratification internal mineral distributed intelligence from the EDS picture, and reconstructs
The three-dimensional structure of every layer of internal mineral matter；
Laminating module, for according to the three-dimensional structure of every layer of minerals, the 3-dimensional digital rock core in organic hole and inorganic hole and
The 3-dimensional digital rock core of microcrack, superposition obtain every layer of multiple dimensioned digital cores；
Determining module determines the distributed intelligence of stratification seam for the distributed intelligence according to adjacent layer minerals；According to vertical
The permeability in stratification direction is constraint, determines the tortuosity of stratification seam；It is constraint according to the permeability along stratification direction, determines layer
Manage the tortuosity of seam；
The laminating module is also used to the multiple dimensioned digital cores of each layer according to the distributed intelligence and the tortuosity
It is overlapped with experiment rock core, obtains number-experiment rock core of rock core scale.
In a possible embodiment, the acquisition module is specifically used for using X-ray energy spectrometer to shale rock sample
It is scanned, obtains the vertical EDS picture of the shale of rock specimens；Shale rock sample is swept using scanning electron microscope
It retouches, obtains the vertical SEM picture of the shale of rock specimens.
In a possible embodiment, the determining module is also used to permeate using multifunctional pulse damping gas
Rate experiment measures shale rock sample at various pressures along the permeability in stratification direction and vertical stratification direction, is tested using N2 adsorption
Obtain the distribution of shale pore radius.
In a possible embodiment, the reconstructed module, specifically for the two-dimension picture according to organic hole
The 3-dimensional digital rock core in organic hole is reconstructed using CSIM-TSS method；Stochastic analysis is used according to the two-dimension picture in the inorganic hole
Method reconstructs the 3-dimensional digital rock core of inorganic hole and microcrack.
In a possible embodiment, the reconstructed module is specifically used for using CCSIM-TSS method and random point
Analysis method combines, and reconstructs the three-dimensional structure of every layer of internal mineral matter.
The reconfiguration scheme of shale core scale number-experimental model provided in an embodiment of the present invention, by obtaining rock-like
This shale vertical EDS picture and SEM picture；Typical stratification inner inorganic hole and organic hole are extracted from the SEM picture
Two-dimension picture；The 3-dimensional digital rock core in organic hole is reconstructed according to the two-dimension picture in organic hole；According to the two of the inorganic hole
Tie up the 3-dimensional digital rock core in picture reconstruction inorganic hole and microcrack；Each stratification internal mineral point is extracted from the EDS picture
Cloth information, and reconstruct the three-dimensional structure of every layer of internal mineral matter；According to the three-dimensional structure of every layer of minerals, three dimensions in organic hole
The 3-dimensional digital rock core in word rock core and inorganic hole and microcrack, superposition obtain every layer of multiple dimensioned digital cores；According to adjacent layer
The distributed intelligence of minerals determines the distributed intelligence of stratification seam；It is constraint according to the permeability trusted along stratification, determines that stratification is stitched
Tortuosity；The multiple dimensioned digital cores of each layer and experiment rock core are folded according to the distributed intelligence and the tortuosity
Add, obtains number-experiment rock core of rock core scale；It may be implemented to construct the digital cores across scale containing texture feature, with reality
The complete characterization in existing hole (seam) space.
Detailed description of the invention
Fig. 1 shows for a kind of process for the reconstructing method that the embodiment of the present invention provides shale core scale number-experimental model
It is intended to；
Fig. 2 is the EDS picture and SEM picture of the embodiment of the present invention obtained according to rock specimens；
Fig. 3 is the schematic diagram of the 3-dimensional digital rock core in the organic hole of reconstruct of the embodiment of the present invention；
Fig. 4 is the schematic diagram in the inorganic hole of extraction of the embodiment of the present invention；
Fig. 5 is the schematic diagram of the three-dimensional structure of every layer of internal mineral matter of reconstruct of the embodiment of the present invention；
Fig. 6 is the schematic diagram for the multiple dimensioned digital cores that the superposition of the embodiment of the present invention obtains every layer；
Fig. 7 is multiple dimensioned digital cores reconstruction result stratification seam building schematic diagram in each layer of the embodiment of the present invention；
Fig. 8 is that a kind of reconstruct apparatus structure of shale core scale number-experimental model provided in an embodiment of the present invention shows
It is intended to.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In order to facilitate understanding of embodiments of the present invention, it is further explained below in conjunction with attached drawing with specific embodiment
Bright, embodiment does not constitute the restriction to the embodiment of the present invention.
Fig. 1 shows for a kind of process for the reconstructing method that the embodiment of the present invention provides shale core scale number-experimental model
It is intended to, as shown in Figure 1, this method specifically includes:
S101, the shale for obtaining rock specimens vertical EDS picture and SEM picture.
Specifically, being scanned using X-ray energy spectrometer to shale rock sample, the vertical EDS of the shale of rock specimens is obtained
Picture；Shale rock sample is scanned using scanning electron microscope, obtains the vertical SEM picture of the shale of rock specimens.
Wherein, referring to Fig. 2 shows the EDS pictures and SEM picture obtained according to rock specimens of the present embodiment.SEM figure
Piece is used to characterize the inorganic hole and organic hole in demonstration sample, and SEM picture also is understood as what the sampling from rock specimens obtained；
EDS picture is for characterizing every layer of internal mineral distributed intelligence, wherein single SEM picture corresponds to the EDS picture of a certain layer.
An optinal plan as the present embodiment, further includes: measured using the experiment of multifunctional pulse damping gas permeability
Shale rock sample along the permeability in stratification direction and vertical stratification direction, is tested using N2 adsorption at various pressures and obtains shale hole
Gap radius distribution.
S102, the two-dimension picture that typical stratification inner inorganic hole, microcrack and organic hole are extracted from the SEM picture.
S103, the 3-dimensional digital rock core that organic hole is reconstructed according to the two-dimension picture in organic hole.
Referring to Fig. 3, the schematic diagram of the 3-dimensional digital rock core in the organic hole of reconstruct of the embodiment of the present invention, specific root are shown
The 3-dimensional digital rock core in organic hole is reconstructed using CSIM-TSS method according to the two-dimension picture in organic hole.
S104, the 3-dimensional digital rock that inorganic hole and microcrack are reconstructed according to the two-dimension picture in the inorganic hole and microcrack
The heart.
The schematic diagram in the inorganic hole of extraction for the embodiment of the present invention is shown referring to Fig. 4, specifically according to the inorganic hole
Two-dimension picture the 3-dimensional digital rock core in inorganic hole is reconstructed using Stochastic Analysis Method.
In this step, it needs to combine in EDS picture and SEM picture, extracts point in inorganic hole in every kind of inorganic mineral
Cloth feature (as shown in Figure 4) then reconstructs the inorganic hole 3-dimensional digital rock core in every kind of inorganic mineral.Every inorganic three dimension of hole
The size of word rock core is 1000*1000*1000um3, resolution ratio 20nm.
S105, each stratification internal mineral distributed intelligence is extracted from the EDS picture, and reconstruct every layer of internal mineral matter
Three-dimensional structure.
Referring to Fig. 5, the schematic diagram of the three-dimensional structure of every layer of internal mineral matter of reconstruct of the embodiment of the present invention is shown, is used
CCSIM-TSS method and Stochastic Analysis Method combine, and reconstruct the three-dimensional structure of every layer of internal mineral matter.
S106, according to the three-dimensional structure of every layer of minerals, the 3-dimensional digital rock core in organic hole and inorganic hole and microcrack
3-dimensional digital rock core, superposition obtain every layer of multiple dimensioned digital cores.
Specifically, referring to figure, show the embodiment of the present invention superposition obtain every layer multiple dimensioned digital cores signal
Figure, using improved multiple dimensioned superposition algorithm, by three dimensions in every layer of each mineral constituent, organic hole and inorganic hole and microcrack
Word rock core is superimposed to obtain every layer of multiple dimensioned digital cores.
The distributed intelligence of mineral typical mineral is extracted from every layer of EDS picture, what is extracted in this example is that content is greater than
5% mineral, i.e., quartzy, illite, pyrite, dolomite, ankerite, oligoclase, organic matter, as shown in Figure 4.Then sharp
The 3-dimensional digital rock core of every kind of mineral is reconstructed with CCSIM-TSS method and Stochastic Analysis Method, the size of each rock core is 1000*
1000*1000um3, resolution ratio 1um.
S107, according to the permeability in vertical stratification direction be constraint, determine the tortuosity in inorganic hole.
S108, according to the distributed intelligence of adjacent layer minerals, determine the distributed intelligence of stratification seam.
S109, according to the permeability along stratification direction be constraint, determine stratification seam tortuosity.
S110, the multiple dimensioned digital cores of each layer and experiment rock core are carried out according to the distributed intelligence and the tortuosity
Superposition, obtains number-experiment rock core of rock core scale.
Specifically, according to the mineral distribution characteristics of adjacent two layers, it is assumed that stratification seam only occurs at different minerals interface, then
The different place of upper layer and lower layer mineral has stratification seam.According to above-mentioned criterion, we are distributed available stratification seam, such as Fig. 7
It is shown.
The reconstructing method of shale core scale number-experimental model provided in an embodiment of the present invention, by obtaining rock-like
This shale vertical EDS picture and SEM picture；Typical stratification inner inorganic hole and organic hole are extracted from the SEM picture
Two-dimension picture；The 3-dimensional digital rock core in organic hole is reconstructed according to the two-dimension picture in organic hole；According to the two of the inorganic hole
Tie up the 3-dimensional digital rock core in picture reconstruction inorganic hole and microcrack；Each stratification internal mineral point is extracted from the EDS picture
Cloth information, and reconstruct the three-dimensional structure of every layer of internal mineral matter；According to the three-dimensional structure of every layer of minerals, three dimensions in organic hole
The 3-dimensional digital rock core in word rock core and inorganic hole and microcrack, superposition obtain every layer of multiple dimensioned digital cores；According to perpendicular layers
The permeability for managing direction is constraint, determines the tortuosity in inorganic hole.According to the distributed intelligence of adjacent layer minerals, determine that stratification is stitched
Distributed intelligence；It is constraint according to the permeability along stratification direction, determines the tortuosity of stratification seam；According to the distributed intelligence and
The multiple dimensioned digital cores of each layer and experiment rock core are overlapped by the tortuosity, obtain number-experiment rock of rock core scale
The heart；It may be implemented to construct the digital cores across scale containing texture feature, to realize the complete characterization in hole (seam) space.
Fig. 8 is that a kind of reconstruct apparatus structure of shale core scale number-experimental model provided in an embodiment of the present invention shows
It is intended to, as shown in figure 8, the device specifically includes:
Module 801 is obtained, the shale for obtaining rock specimens vertical EDS picture and SEM picture；
Extraction module 802, for extracting typical stratification inner inorganic hole, microcrack and organic hole from the SEM picture
Two-dimension picture；
Reconstructed module 803, for reconstructing the 3-dimensional digital rock core in organic hole according to the two-dimension picture in organic hole；According to
The inorganic hole, microcrack two-dimension picture reconstruct the 3-dimensional digital rock core of inorganic hole and microcrack；
The extraction module 802 is also used to extract each stratification internal mineral distributed intelligence from the EDS picture, and
Reconstruct the three-dimensional structure of every layer of internal mineral matter；
Laminating module 804, for according to the three-dimensional structure of every layer of minerals, the 3-dimensional digital rock core in organic hole and inorganic hole
With the 3-dimensional digital rock core of microcrack, superposition obtains every layer of multiple dimensioned digital cores；
Determining module 805 determines the distributed intelligence of stratification seam for the distributed intelligence according to adjacent layer minerals；According to
The permeability in vertical stratification direction is constraint, determines the tortuosity of stratification seam；It is constraint according to the permeability along stratification direction, really
The tortuosity of given layer reason seam；
The laminating module 804 is also used to the multiple dimensioned number of each layer according to the distributed intelligence and the tortuosity
Rock core and experiment rock core are overlapped, and obtain number-experiment rock core of rock core scale.
Optionally, the acquisition module 801 is obtained specifically for being scanned using X-ray energy spectrometer to shale rock sample
The vertical EDS picture of the shale of rock specimens；Shale rock sample is scanned using scanning electron microscope, obtains rock specimens
The vertical SEM picture of shale.
Optionally, the determining module 805 is also used to measure shale using the experiment of multifunctional pulse damping gas permeability
Rock sample along the permeability in stratification direction and vertical stratification direction, is tested using N2 adsorption at various pressures and obtains shale hole half
Diameter distribution.
Optionally, the reconstructed module 803, specifically for using the side CSIM-TSS according to the two-dimension picture in organic hole
Method reconstructs the 3-dimensional digital rock core in organic hole；Inorganic hole is reconstructed using Stochastic Analysis Method according to the two-dimension picture in the inorganic hole
With the 3-dimensional digital rock core of microcrack.
Optionally, the reconstructed module 803, specifically for being combined using CCSIM-TSS method and Stochastic Analysis Method,
Reconstruct the three-dimensional structure of every layer of internal mineral matter.
The reconfiguration scheme of shale core scale number-experimental model provided in an embodiment of the present invention, by obtaining rock-like
This shale vertical EDS picture and SEM picture；Typical stratification inner inorganic hole and organic hole are extracted from the SEM picture
Two-dimension picture；The 3-dimensional digital rock core in organic hole is reconstructed according to the two-dimension picture in organic hole；According to the two of the inorganic hole
Tie up the 3-dimensional digital rock core in picture reconstruction inorganic hole and microcrack；Each stratification internal mineral point is extracted from the EDS picture
Cloth information, and reconstruct the three-dimensional structure of every layer of internal mineral matter；According to the three-dimensional structure of every layer of minerals, three dimensions in organic hole
The 3-dimensional digital rock core in word rock core and inorganic hole and microcrack, superposition obtain every layer of multiple dimensioned digital cores；According to adjacent layer
The distributed intelligence of minerals determines the distributed intelligence of stratification seam；It is constraint according to the permeability trusted along stratification, determines that stratification is stitched
Tortuosity；The multiple dimensioned digital cores of each layer and experiment rock core are folded according to the distributed intelligence and the tortuosity
Add, obtains number-experiment rock core of rock core scale；It may be implemented to construct the digital cores across scale containing texture feature, with reality
The complete characterization in existing hole (seam) space.
Professional should further appreciate that, described in conjunction with the examples disclosed in the embodiments of the present disclosure
Unit and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software generally describes each exemplary composition and step according to function in the above description.
These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.
Professional technician can use different methods to achieve the described function each specific application, but this realization
It should not be considered as beyond the scope of the present invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can be executed with hardware, processor
The combination of software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only memory
(ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of reconstructing method of shale core scale number-experimental model characterized by comprising
Obtain the shale of rock specimens vertical EDS picture and SEM picture；
The two-dimension picture in typical stratification inner inorganic hole, microcrack and organic hole is extracted from the SEM picture；
The 3-dimensional digital rock core in organic hole is reconstructed according to the two-dimension picture in organic hole；
The 3-dimensional digital rock core of inorganic hole and microcrack is reconstructed according to the two-dimension picture in the inorganic hole, microcrack；
Each stratification internal mineral distributed intelligence is extracted from the EDS picture, and reconstructs the three-dimensional knot of every layer of internal mineral matter
Structure；
According to the three-dimensional structure of every layer of minerals, the 3-dimensional digital rock of the 3-dimensional digital rock core in organic hole and inorganic hole and microcrack
The heart, superposition obtain every layer of multiple dimensioned digital cores；
According to the distributed intelligence of adjacent layer minerals, the distributed intelligence of stratification seam is determined；
It is constraint according to the permeability in vertical stratification direction, determines the tortuosity in inorganic hole；
It is constraint according to the permeability along stratification direction, determines the tortuosity of stratification seam；
The multiple dimensioned digital cores of each layer and experiment rock core are overlapped according to the distributed intelligence and the tortuosity, are obtained
The number of rock core scale-experiment rock core.
2. the method according to claim 1, wherein the EDS picture that the shale for obtaining rock specimens is vertical
With SEM picture, comprising:
Shale rock sample is scanned using X-ray energy spectrometer, obtains the vertical EDS picture of the shale of rock specimens；
Shale rock sample is scanned using scanning electron microscope, obtains the vertical SEM picture of the shale of rock specimens.
3. the method according to claim 1, wherein the method also includes:
Shale rock sample is measured at various pressures along stratification direction and vertical using the experiment of multifunctional pulse damping gas permeability
The permeability in stratification direction is tested using N2 adsorption and obtains the distribution of shale pore radius.
4. the method according to claim 1, wherein using CSIM-TSS according to the two-dimension picture in organic hole
Method reconstructs the 3-dimensional digital rock core in organic hole；
The 3-dimensional digital rock core of inorganic hole and microcrack is reconstructed using Stochastic Analysis Method according to the two-dimension picture in the inorganic hole.
5. the method according to claim 1, wherein mutually being tied using CCSIM-TSS method with Stochastic Analysis Method
It closes, reconstructs the three-dimensional structure of every layer of internal mineral matter.
6. a kind of reconstruct device of shale core scale number-experimental model characterized by comprising
Module is obtained, the shale for obtaining rock specimens vertical EDS picture and SEM picture；
Extraction module, for extracting the X-Y scheme in typical stratification inner inorganic hole, microcrack and organic hole from the SEM picture
Piece；
Reconstructed module, for reconstructing the 3-dimensional digital rock core in organic hole according to the two-dimension picture in organic hole；According to the nothing
Machine hole, microcrack two-dimension picture reconstruct the 3-dimensional digital rock core of inorganic hole and microcrack；
The extraction module is also used to extract each stratification internal mineral distributed intelligence from the EDS picture, and reconstructs every layer
The three-dimensional structure of internal mineral matter；
Laminating module, for according to the three-dimensional structure of every layer of minerals, the 3-dimensional digital rock core in organic hole and inorganic hole and fine fisssure
The 3-dimensional digital rock core of seam, superposition obtain every layer of multiple dimensioned digital cores；
Determining module determines the distributed intelligence of stratification seam for the distributed intelligence according to adjacent layer minerals；According to vertical stratification
The permeability in direction is constraint, determines the tortuosity of stratification seam；It is constraint according to the permeability along stratification direction, determines that stratification is stitched
Tortuosity；
The laminating module is also used to the multiple dimensioned digital cores and reality of each layer according to the distributed intelligence and the tortuosity
It tests rock core to be overlapped, obtains number-experiment rock core of rock core scale.
7. device according to claim 6, which is characterized in that the acquisition module is specifically used for using X-ray energy spectrometer
Shale rock sample is scanned, the vertical EDS picture of the shale of rock specimens is obtained；Using scanning electron microscope to shale rock
Sample is scanned, and obtains the vertical SEM picture of the shale of rock specimens.
8. device according to claim 6, which is characterized in that the determining module is also used to decline using multifunctional pulse
Subtract gas permeability experiment and measure shale rock sample at various pressures along the permeability in stratification direction and vertical stratification direction, utilizes
N2 adsorption experiment obtains the distribution of shale pore radius.
9. device according to claim 6, which is characterized in that the reconstructed module is specifically used for according to organic hole
Two-dimension picture the 3-dimensional digital rock core in organic hole is reconstructed using CSIM-TSS method；It is adopted according to the two-dimension picture in the inorganic hole
The 3-dimensional digital rock core of inorganic hole and microcrack is reconstructed with Stochastic Analysis Method.
10. device according to claim 6, which is characterized in that the reconstructed module is specifically used for using CCSIM-TSS
Method and Stochastic Analysis Method combine, and reconstruct the three-dimensional structure of every layer of internal mineral matter.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110210176A (en) * | 2019-06-24 | 2019-09-06 | 中国科学院武汉岩土力学研究所 | A kind of granite micro crack structure recognition and microscopic seepage analysis method |
| CN111060428A (en) * | 2019-12-12 | 2020-04-24 | 清华大学 | Digital reconstruction method of multi-level rock core structure |
| CN113945175A (en) * | 2021-10-14 | 2022-01-18 | 中国地质科学院地质力学研究所 | Rock three-dimensional data acquisition method and device |
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