CN107064187A - A kind of content of organic carbon of hydrocarbon source rock assay method and device - Google Patents
A kind of content of organic carbon of hydrocarbon source rock assay method and device Download PDFInfo
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- CN107064187A CN107064187A CN201710263925.9A CN201710263925A CN107064187A CN 107064187 A CN107064187 A CN 107064187A CN 201710263925 A CN201710263925 A CN 201710263925A CN 107064187 A CN107064187 A CN 107064187A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
Abstract
The embodiment of the present application provides a kind of content of organic carbon of hydrocarbon source rock assay method and device, and methods described includes：Obtain the first three-dimensional CT scan image and background CT scan image of rock core；According to the background CT scan image, background value deduction is carried out to first three-dimensional CT scan image, the second three-dimensional CT scan image is obtained；According to the gray value of each pixel in second three-dimensional CT scan image, the pixel covered in second three-dimensional CT scan image by organic carbon is recognized；The pixel covered according to the organic carbon, obtains the spatial distribution and the volume fraction of organic carbon of the organic carbon of the rock core.The embodiment of the present application can intuitively show organic carbon three-dimensional spatial distribution feature, while accurately obtaining the volume fraction of organic carbon content.
Description
Technical field
The application is related to oil and gas exploration technical field, more particularly, to a kind of content of organic carbon of hydrocarbon source rock measure side
Method and device.
Background technology
Hydrocarbon source rock is a kind of can to produce or produce the rock of removable hydro carbons.It can be generally defined as rich in organic
The rock of matter, a large amount of generation oil gas and discharge oil gas.Evaluation of source rocks is that oil gas prospects one of important content with resource assessment,
And abundance of organic matter is used as the emphasis that the key parameter of Evaluation of source rocks is always that Petroleum Geology Theory is studied.Evaluating organic matter
During abundance, organic carbon content is to use most commonly used evaluating again.
Conventional organic carbon content assay method mainly includes at present：Laboratory method and SEM imaging
Method etc..Wherein, laboratory method is removed after the DIC in sample with watery hydrochloric acid first when determining organic carbon content, then
Burnt in flow of high temperature oxygen, total organic carbon is converted into carbon dioxide, detected through infrared detector and provide total organic carbon
Content.What laboratory method was obtained is the mass fraction of organic carbon, can only quantitative assessment organic carbon content, it is impossible to display directly perceived
The characteristic distributions and occurrence status of organic matter.When SEM imaging method determines organic carbon content, first using scanning
Electron microscope carries out planar imaging to sample, the organic carbon in spectrum identification image is recycled, so as to obtain organic carbon content.
SEM imaging method can only show characteristic distributions of the organic matter in two dimensional surface, it is impossible to accurate to obtain in sample space
The volume fraction of organic carbon content.
The content of the invention
The purpose of the embodiment of the present application is to provide a kind of content of organic carbon of hydrocarbon source rock assay method and device, intuitively to open up
Existing organic carbon three-dimensional spatial distribution feature, while accurately obtaining the volume fraction of organic carbon content.
To reach above-mentioned purpose, the embodiment of the present application provides a kind of content of organic carbon of hydrocarbon source rock assay method, the side
Method includes：
Obtain the first three-dimensional CT scan image and background CT scan image of rock core；
According to the background CT scan image, background value deduction is carried out to first three-dimensional CT scan image, the is obtained
Two three-dimensional CT scan images；
According to the gray value of each pixel in second three-dimensional CT scan image, second three-D CT scanning is recognized
The pixel covered in image by organic carbon；
The pixel covered according to the organic carbon, obtains the spatial distribution and organic carbon of the organic carbon of the rock core
Volume fraction.
For up to above-mentioned purpose, the embodiment of the present application additionally provides a kind of content of organic carbon of hydrocarbon source rock and determines device, the dress
Put including：
First acquisition module, the first three-dimensional CT scan image and background CT scan image for obtaining rock core；
Background value deducts module, for according to the background CT scan image, entering to first three-dimensional CT scan image
Row background value is deducted, and obtains the second three-dimensional CT scan image；
Identification module, for the gray value according to each pixel in second three-dimensional CT scan image, identification is described
The pixel covered in second three-dimensional CT scan image by organic carbon；
Second acquisition module, for the pixel covered according to the organic carbon, obtains the organic carbon of the rock core
The volume fraction of spatial distribution and organic carbon.
The technical scheme provided from above-mentioned the embodiment of the present application, the embodiment of the present application has carried out three to rock core first
Vc T is imaged, and by the gray scale of CT images, have identified the pixel that organic carbon is covered in core three-dimensional CT images, so that
Obtain the spatial distribution and the volume fraction of organic carbon of the organic carbon in rock core.The embodiment of the present application is accurately obtaining organic carbon
While volume fraction, the spatial distribution characteristic of organic carbon is also intuitively given, is conducive to preferably evaluating hydrocarbon source rock.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present application, constitutes the embodiment of the present application
A part, does not constitute the restriction to the embodiment of the present application.In the accompanying drawings：
Fig. 1 is a kind of content of organic carbon of hydrocarbon source rock assay method schematic flow sheet of the embodiment of the present application；
Fig. 2 a and Fig. 2 b are respectively the two-dimensional ct sectioning image schematic diagram and two-dimensional ct sectioning image of the embodiment of the present application
Material mutually defines result schematic diagram；
Fig. 3 mutually defines result schematic diagram for the three-dimensional CT scan image material of the embodiment of the present application；
Fig. 4 is the organic carbon spatial distribution schematic diagram of the embodiment of the present application；
Fig. 5 determines schematic device for a kind of content of organic carbon of hydrocarbon source rock of the embodiment of the present application.
Embodiment
For the purpose, technical scheme and advantage of the embodiment of the present application are more clearly understood, with reference to embodiment and attached
Figure, is described in further details to the embodiment of the present application.Here, the schematic description and description of the embodiment of the present application is used for
The embodiment of the present application is explained, but is not intended as the restriction to the embodiment of the present application.
Below in conjunction with the accompanying drawings, the embodiment to the embodiment of the present application is described in further detail.
With reference to shown in Fig. 1, a kind of content of organic carbon of hydrocarbon source rock assay method that the embodiment of the present application is provided can include
Following steps.The hydrocarbon source rock can refer to the rock for producing or having produced removable hydro carbons, for example, mud shale and carbon
Carbonate Rocks etc..The organic carbon can refer to the carbon removed in rock beyond the DIC such as carbonate and graphite.Hydrocarbon source rock it is organic
Carbon content is to evaluate the important parameter of primary rock producing hydrocarbon Hydrocarbon yield, and the evaluation for oil-and-gas basin stock number provides foundation.
S101, obtains the first three-dimensional CT scan image and background CT scan image of rock core.
In the present embodiment, the rock core can refer to the rock core of the hydrocarbon source rock by pretreatment.The pretreatment can be wrapped
Include cutting, shaping etc..Specifically, rock core can be processed into cylinder.It is processed into cylinder and is to ensure CT in imaging,
The penetration thickness of ray is equal on every bit, so as to ensure optimal imaging effect.The three-dimensional CT scan image can pass through
CT instruments are completed.For example, industry CT or Medical CT etc..First three-dimensional CT scan image and the background CT scan image
It should be and obtain image under identical imaging parameters.The air back of the body that wherein described background CT scan image is obtained when can be not setting-out product
The CT scan image of scape.
S102, according to the background CT scan image, carries out background value deduction to first three-dimensional CT scan image, obtains
To the second three-dimensional CT scan image.
When in the present embodiment, due to carrying out CT scan imaging to the rock core, imaging region also has the presence of air.Will
The first three-dimensional CT scan image directly collected carries out background value deduction.Three-D CT scanning after being deducted further according to background value
Image, the CT scan image of rock core is obtained using CT algorithm for reconstructing, i.e., described second three-dimensional CT scan image.Described second is three-dimensional
CT scan image can be a series of set of two-dimensional ct sections.Generally described background value deducts what can be carried by CT instruments
Analysis software is completed.The CT algorithm for reconstructing can include：Inverse Projection, filtered back-projection and iterative method etc..
S103, according to the gray value of each pixel in second three-dimensional CT scan image, recognizes that described second is three-dimensional
The pixel that organic carbon in CT scan image is covered.
When carrying out CT imagings, the gray scale of each pixel is relevant with the atomic series of material and density, therefore not jljl
The gray value that matter is showed in CT images is also differed.The present embodiment is based on the identification that principles above carries out organic carbon.
Specifically, in the present embodiment, it is believed that the composition of the rock core includes：Hole, mineral matter matrix and the class of organic carbon three.
This three classes heterogeneity is when CT is imaged, and the gray value showed is different, so as to be compartmentalized.Under normal circumstances, ore deposit
Material matrix gray value highest in CT images, organic carbon gray value in CT images takes second place, hole gray value in CT images
It is minimum.In this embodiment it is believed that material composition is identical in same pixel.Words sentence is talked about, in the present embodiment, a picture
The composition of vegetarian refreshments can be one kind in hole, mineral matter matrix or organic carbon.
In the present embodiment, according to organic carbon in CT images grey value profile rule, second three dimensional CT is swept
Tracing finds out the pixel that wherein organic carbon is covered as carrying out spot scan pixel-by-pixel.In the specific embodiment of the application
In, the pixel that organic carbon is covered can be recognized by following step.
1st, the gray value of each pixel in second three-dimensional CT scan image, determines organic carbon in CT scan
Intensity value ranges in image.
In the present embodiment, in general, mineral matter matrix gray value highest in CT images, organic carbon is in CT images
Gray value takes second place, and hole gray value in CT images is minimum.Therefore can be according to stating pixel in the second three-dimensional CT scan image
Gray value, determine intensity value ranges of the organic carbon in CT scan image.It is specific to determine method, can be by obtaining second
The intensity profile histogram of three-dimensional CT scan image, according to half-tone information in gradation of image distribution histogram, is obtained using experience
Intensity value ranges of the organic carbon in CT scan image.
2nd, the intensity value ranges according to the organic carbon in CT scan image, recognize second three-dimensional CT scan image
The middle pixel covered by organic carbon.
According to the gray value and organic carbon of each pixel in second three-dimensional CT scan image in CT scan image
The scope of middle gray value, it is possible to which it is organic carbon to obtain the material in which pixel.
In the specific embodiment of the application, the pixel that identification organic carbon is covered can specifically include following several
Individual step.
(1) according to second three-dimensional CT scan image, the first two-dimensional ct sectioning image set is obtained；First two dimension
Two-dimensional ct sectioning image in CT sectioning image set is that three-dimensional CT scan image is cut, and the quantity specifically cut can be with
According to the ccd image resolution setting of used CT equipment.
In the present embodiment, second three-dimensional CT scan image can be with certain amount two-dimensional ct sectioning image come table
Show.The certain amount two-dimensional ct sectioning image constitutes the first two-dimensional ct sectioning image set.Can image be interpreted as
Go to cut three-dimensional CT scan image with fixed thickness, so as to obtain two-dimensional ct sectioning image one by one.The thickness is generally and CT
Instrument ccd image resolution ratio is relevant.For example, CCD resolution ratio is 1024 × 1024. CT obtained with fixed thickness cutting
The quantity of section is usually 1024.
(2) gray scale of the pixel of each two-dimensional ct sectioning image in the first two-dimensional ct sectioning image set
Value, determines intensity value ranges of the organic carbon in CT scan image.
(3) gray scale of two-dimensional ct sectioning image each pixel in the first two-dimensional ct sectioning image set
Value, obtains the pixel that organic carbon is covered.
S104, the pixel covered according to the organic carbon, obtain the organic carbon of the rock core spatial distribution and
The volume fraction of organic carbon.
In the present embodiment, S103 knows the pixel that organic carbon is covered in the two-dimensional ct sectioning image set
Do not come out, now can just show the pixel distribution situation that is covered of organic carbon by some image processing techniques and count
Its number.
In one embodiment of the application, S104 can be realized by following steps.
1st, the pixel covered in second three-dimensional CT scan image by organic carbon is marked using preset rules, is obtained
The 3rd three-dimensional CT scan image after mark, and obtain the spatial distribution of the organic carbon of the rock core.
In the present embodiment, the preset rules can refer to the pixel for being covered the organic carbon and other pictures
The rule-like that vegetarian refreshments is distinguished.For example, the gray value of the pixel that organic carbon is covered in two-dimensional ct sectioning image is set
For 255, the gray value of rest of pixels point is set to 0.To carrying out quasi- pixel mark in second three-dimensional CT scan image, mark
The pixel that organic carbon is covered in second three-dimensional CT scan image afterwards pixel is covered with other non-organic carbon just by
It is distinguished, it is possible to obtain the spatial distribution of organic carbon in the rock core.
2nd, the pixel that organic carbon is covered in acquisition the 3rd three-dimensional CT scan image accounts for the 3rd three dimensional CT and swept
The percentage of all pixels point of tracing picture, obtains the volume fraction of organic carbon.
In the present embodiment, the sum of pixel in the 3rd three-dimensional CT scan image can be first counted, then is counted
The pixel number wherein covered by organic carbon.The pixel number that organic carbon is covered and the total ratio of pixel, it is possible to
Obtain the volume fraction of organic carbon in the rock core.
Embodiment as shown in Figure 1 understands that the embodiment of the present application has carried out three-D CT imaging to rock core first, and passes through CT
The gray scale of image, have identified the pixel that organic carbon is covered in core three-dimensional CT images, so as to obtain organic in rock core
The spatial distribution of carbon and the volume fraction of organic carbon.The embodiment of the present application accurately obtain organic carbon volume fraction while,
The spatial distribution characteristic of organic carbon is also intuitively given, is conducive to preferably evaluating hydrocarbon source rock.
In one embodiment of the application, the three-dimensional CT scan image and background CT scan image of the rock core
To be obtained by nanometer CT.More preferably, the organic carbon content measurement result so obtained is more accurate for nanometer CT resolution ratio.
In one embodiment of the application, the hydrocarbon source rock core sample of organic carbon content to be determined is derived from North America marine facies
Macellus shale is appeared.The shale core sample of acquisition is divided into two classes, a class measures organic using laboratory method
Carbon content, the method that another kind of use the embodiment of the present application is provided determines organic carbon content.Laboratory, which measures core sample, to be had
The mass fraction of machine carbon content is 2.66%, and has been generally acknowledged that half of the density of organic carbon for Rock Matrix mineral, thus may be used
The volume fraction for knowing the organic matter of the core sample is 5.32%.The method provided using the embodiment of the present application determines organic carbon
Content flow is as follows.
1st, shale core sample is prepared.65 μm of diameter, the highly cylinder for 100 μm is made in shale core.
The 2nd, nanometer CT imaging parameters are set, after nanometer CT is stable, the three-D CT scanning figure of shale core sample is obtained
Picture.
In the present embodiment, nanometer CT imaging parameters can include：X-ray emitter voltage is 40Kv, and electric current is
20mA.When obtaining the three-dimensional CT scan image of mud shale rock core sample, the time for exposure can be 90~120s, scan the anglec of rotation
Degree can be 360 degree, and scanning angle can be set to 1201.
3rd, mud shale rock core sample is removed, is kept into as parameter constant, obtains background CT images now.
4th, according to background CT images, software is carried using nanometer CT, the three-dimensional CT scan image of shale core sample is deducted
In background value, further according to the three-dimensional CT scan image after deduction, using filter back-projection algorithm, obtain two-dimensional ct slice map
Picture.
Fig. 2 a show the two-dimensional ct sectioning image that nanometer CT scan is obtained, Fig. 2 a mesopores part colours gray value
Minimum, organic matter fractions take second place, mineral matter matrix gray value highest.
5th, all 2-D gray images obtained in step 4 are subjected to image filtering and image enhaucament, obtained after processing
2-D gray image.The purpose of image procossing is to improve the quality of image.
6th, according to the gray value of all two-dimensional ct sectioning images after processing, material is carried out to two-dimensional ct sectioning image mutually fixed
Justice.It can be to represent same substance in figure with same gray value that the material, which is mutually defined,.
The result mutually defined to Fig. 2 a figure progress materials is as shown in Figure 2 b.Black portions are organic carbon, organic carbon in Fig. 2 b
Internal Dark grey is hole, and light gray substance is mineral matter matrix.White portion is the mineral of iron content, such as pyrite.
7th, by the two-dimensional ct sectioning image after material is mutually defined, 3-D view is reconstructed into, as a result as shown in Figure 3.Fig. 3
Middle black portions are that the Dark grey inside organic carbon, organic carbon is hole, and light gray substance is mineral matter matrix.
8th, further the organic carbon identified in step 7 is labeled, obtains the spatial distribution of organic carbon, as a result as schemed
Shown in 4.
9th, the pixel in statistical chart 4 shared by organic carbon accounts for the percentage of whole Fig. 4 all pixels point number, obtains shale
The volume fraction of core sample organic carbon content.
In the present embodiment, the volume fraction of the shale core sample organic carbon content finally given using above-mentioned steps is
5.05%.Error between the result that the conclusion and laboratory method are obtained is 5.25%, and this is in error allowed band.By
This understands that the embodiment of the present application institute extracting method measurement result is reliable.
From above-mentioned the embodiment of the present application, the embodiment of the present application has carried out three-D CT imaging to rock core first, and passes through
The gray scale of CT images, have identified the pixel that organic carbon is covered in core three-dimensional CT images, so as to obtain having in rock core
The spatial distribution of machine carbon and the volume fraction of organic carbon.The embodiment of the present application is accurately obtaining the same of organic carbon volume fraction
When, the spatial distribution characteristic of organic carbon is also intuitively given, is conducive to preferably evaluating hydrocarbon source rock.
A kind of content of organic carbon of hydrocarbon source rock is additionally provided in the embodiment of the present application and determines device, such as the following examples institute
State.Because the principle that the device solves problem is similar to a kind of content of organic carbon of hydrocarbon source rock assay method, therefore the reality of the device
Apply and may refer to the implementation that a kind of content of organic carbon of hydrocarbon source rock determines device, repeat part and repeat no more.
As shown in figure 5, a kind of content of organic carbon of hydrocarbon source rock for being provided of the embodiment of the present application determine device can include with
Under several modules.
First acquisition module 501, the first three-dimensional CT scan image and background CT scan image for obtaining rock core.
Background deduction module 502, for according to the background CT scan image, entering to first three-dimensional CT scan image
Row background value is deducted, and obtains the second three-dimensional CT scan image.
Identification module 503, for the gray value according to each pixel in second three-dimensional CT scan image, recognizes institute
State the pixel covered in the second three-dimensional CT scan image by organic carbon.
Second acquisition module 504, for the pixel covered according to the organic carbon, obtains the organic carbon of the rock core
Spatial distribution and organic carbon volume fraction.
From above-mentioned the application device embodiment, the embodiment of the present application has carried out three-D CT imaging to rock core first, and
By the gray scale of CT images, the pixel that organic carbon is covered in core three-dimensional CT images is have identified, so as to obtain in rock core
Organic carbon spatial distribution and the volume fraction of organic carbon.The embodiment of the present application is accurately obtaining organic carbon volume fraction
Meanwhile, the spatial distribution characteristic of organic carbon is also intuitively given, is conducive to preferably evaluating hydrocarbon source rock.
The step of method described in the embodiment of the present application or algorithm can be directly embedded into hardware, computing device it is soft
Part module or the combination of both.Software module can be stored in RAM memory, flash memory, ROM memory, EPROM storages
Other any form of storage media in device, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this area
In.Exemplarily, storage medium can be connected with processor, to allow processor to read information from storage medium, and
Write information can be deposited to storage medium.Alternatively, storage medium can also be integrated into processor.Processor and storage medium can
To be arranged in ASIC, ASIC can be arranged in user terminal.Alternatively, processor and storage medium can also be arranged at use
In different parts in the terminal of family.
In one or more exemplary designs, above-mentioned functions described by the embodiment of the present application can be in hardware, soft
Part, firmware or any combination of this three are realized.If realized in software, these functions can be stored and computer-readable
On medium, or with it is one or more instruction or code form be transmitted on the medium of computer-readable.Computer readable medium includes electricity
Brain stores medium and is easy to so that allowing computer program to be transferred to other local telecommunication medias from a place.Storing medium can be with
It is that any general or special computer can be with the useable medium of access.For example, such computer readable media can include but
It is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or other
What can be used for carrying or store with instruct or data structure and it is other can be by general or special computer or general or specially treated
Device reads the medium of the program code of form.In addition, any connection can be properly termed computer readable medium, example
Such as, if software is to pass through a coaxial cable, fiber optic cables, double from web-site, server or other remote resources
Twisted wire, Digital Subscriber Line (DSL) or with defined in being also contained in of the wireless way for transmitting such as infrared, wireless and microwave
In computer readable medium.Described disk (disk) and disk (disc) include Zip disk, radium-shine disk, CD, DVD, floppy disk
And Blu-ray Disc, disk is generally with magnetic duplication data, and disk generally carries out optical reproduction data with laser.Combinations of the above
It can also be included in computer readable medium.
Particular embodiments described above, purpose, technical scheme and beneficial effect to the application have been carried out further in detail
Describe in detail bright, should be understood that the specific embodiment that the foregoing is only the embodiment of the present application, be not used to limit this Shen
Protection domain please, all any modification, equivalent substitution and improvements within spirit herein and principle, done etc., it all should wrap
It is contained within the protection domain of the application.
Claims (10)
1. a kind of content of organic carbon of hydrocarbon source rock assay method, it is characterised in that the described method comprises the following steps：
Obtain the first three-dimensional CT scan image and background CT scan image of rock core；
According to the background CT scan image, background value deduction is carried out to first three-dimensional CT scan image, the two or three is obtained
Vc T scan images；
According to the gray value of each pixel in second three-dimensional CT scan image, second three-dimensional CT scan image is recognized
The middle pixel covered by organic carbon；
The pixel covered according to the organic carbon, obtains the spatial distribution and the body of organic carbon of the organic carbon of the rock core
Fraction.
2. the method as described in claim 1, it is characterised in that the pixel covered according to the organic carbon, is obtained
The spatial distribution of the organic carbon of the rock core and the volume fraction of organic carbon, are specifically included：
The pixel covered in second three-dimensional CT scan image by organic carbon is marked using preset rules, is obtained after mark
The 3rd three-dimensional CT scan image, and obtain the spatial distribution of the organic carbon of the rock core；
Obtain the pixel that organic carbon is covered in the 3rd three-dimensional CT scan image and account for the 3rd three-dimensional CT scan image
All pixels point percentage, obtain the volume fraction of organic carbon.
3. the method as described in claim 1, it is characterised in that described according to each picture in second three-dimensional CT scan image
The gray value of vegetarian refreshments, recognizes the pixel covered in second three-dimensional CT scan image by organic carbon, specifically includes：
The gray value of each pixel in second three-dimensional CT scan image, determines organic carbon in CT scan image
Intensity value ranges；
According to intensity value ranges of the organic carbon in CT scan image, recognize is had in second three-dimensional CT scan image
The pixel that machine carbon is covered.
4. the method as described in claim 1, it is characterised in that described according to each in second three-dimensional CT scan image
The gray value of pixel, recognizes the pixel covered in second three-dimensional CT scan image by organic carbon, also includes before：
Second three-dimensional CT scan image is pre-processed, the 3rd three-dimensional CT scan image is obtained；
It is corresponding, the gray value according to each pixel in second three-dimensional CT scan image, identification the described 2nd 3
The pixel covered in Vc T scan images by organic carbon, is specifically included：
According to the gray value of each pixel in the 3rd three-dimensional CT scan image, the 3rd three-dimensional CT scan image is recognized
The middle pixel covered by organic carbon.
5. the method as described in claim 1, it is characterised in that first three-dimensional CT scan image and background CT scan figure
As being obtained using nanometer CT.
6. a kind of content of organic carbon of hydrocarbon source rock determines device, it is characterised in that described device includes：
First acquisition module, the first three-dimensional CT scan image and background CT scan image for obtaining rock core；
Background value deducts module, for according to the background CT scan image, being carried on the back to first three-dimensional CT scan image
Scape value is deducted, and obtains the second three-dimensional CT scan image；
Identification module, for the gray value according to each pixel in second three-dimensional CT scan image, identification described second
The pixel covered in three-dimensional CT scan image by organic carbon；
Second acquisition module, for the pixel covered according to the organic carbon, obtains the space of the organic carbon of the rock core
Distribution and the volume fraction of organic carbon.
7. device as claimed in claim 6, it is characterised in that second acquisition module is specifically included：
Spatial distribution obtains subelement, for being marked using preset rules in second three-dimensional CT scan image by organic carbon institute
The pixel of covering, the 3rd three-dimensional CT scan image after being marked, and obtain the spatial distribution of the organic carbon of the rock core；
Volume fraction obtains subelement, is accounted for for obtaining the pixel that organic carbon is covered in the 3rd three-dimensional CT scan image
The percentage of all pixels point of 3rd three-dimensional CT scan image, obtains the volume fraction of organic carbon.
8. device as claimed in claim 6, it is characterised in that the identification module is specifically included：
Scope determination subelement, for the gray value of each pixel in second three-dimensional CT scan image, it is determined that
Intensity value ranges of the organic carbon in CT scan image；
Pixel recognizes subelement, for the intensity value ranges according to the organic carbon in CT scan image, recognizes described the
The pixel covered in two three-dimensional CT scan images by organic carbon.
9. device as claimed in claim 6, it is characterised in that described device also includes：
Pretreatment module, for second three-dimensional CT scan image to be pre-processed, obtains the 3rd three-dimensional CT scan image；
Corresponding, the identification module is specifically for the gray scale according to each pixel in second three-dimensional CT scan image
Value, recognizes the pixel covered in second three-dimensional CT scan image by organic carbon.
10. device as claimed in claim 6, it is characterised in that first three-dimensional CT scan image and background CT scan
Image is obtained using nanometer CT.
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| CN108318514A (en) * | 2018-01-08 | 2018-07-24 | 中国石油天然气股份有限公司 | A kind of method of the attribute information of determining graptolite body and country rock |
| CN108875184A (en) * | 2018-06-08 | 2018-11-23 | 中国石油天然气股份有限公司 | Shale organic carbon content prediction technique and device based on digital model of appearing |
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| CN110426350A (en) * | 2019-05-15 | 2019-11-08 | 中国石油大学(北京) | The quantitative approach and system of maceral composition in a kind of rock |
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