CN110333178A - Shale pyrite hole characterizing method and its application - Google Patents
Shale pyrite hole characterizing method and its application Download PDFInfo
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- CN110333178A CN110333178A CN201910738808.2A CN201910738808A CN110333178A CN 110333178 A CN110333178 A CN 110333178A CN 201910738808 A CN201910738808 A CN 201910738808A CN 110333178 A CN110333178 A CN 110333178A
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- 229910052683 pyrite Inorganic materials 0.000 title claims abstract description 181
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 title claims abstract description 180
- 239000011028 pyrite Substances 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000011161 development Methods 0.000 claims abstract description 88
- 241000220223 Fragaria Species 0.000 claims abstract description 83
- 235000016623 Fragaria vesca Nutrition 0.000 claims abstract description 81
- 235000011363 Fragaria x ananassa Nutrition 0.000 claims abstract description 81
- 239000011148 porous material Substances 0.000 claims abstract description 34
- 238000001228 spectrum Methods 0.000 claims abstract description 13
- 238000012512 characterization method Methods 0.000 claims abstract description 9
- 230000018109 developmental process Effects 0.000 claims description 82
- 238000005520 cutting process Methods 0.000 claims description 27
- 238000010586 diagram Methods 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 238000010191 image analysis Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 6
- -1 argon ion Chemical class 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000000445 field-emission scanning electron microscopy Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 5
- 238000013507 mapping Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000021012 strawberries Nutrition 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 244000307700 Fragaria vesca Species 0.000 description 1
- 235000021028 berry Nutrition 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N23/22—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 measuring secondary emission from the material
- G01N23/225—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 measuring secondary emission from the material using electron or ion
- G01N23/2251—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 measuring secondary emission from the material using electron or ion using incident electron beams, e.g. scanning electron microscopy [SEM]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0833—Pore surface area
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to technical field of geological exploration, disclose a kind of shale pyrite hole characterizing method, comprising: determine that pyrite develops microcell in shale microcell using power spectrum；Calculate in shale microcell, the pyrite development microcell gross area accounts for the total area ratio X of shale microcell, and the area for calculating all holes in shale microcell accounts for the total area ratio Y of shale microcell；Calculate the ratio between the gross area and all strawberry shape pyrite development microcell gross area of the hole in the shale microcell in all strawberry shape pyrite development microcells C characterization strawberry shape pyrite development microcell Areal porosity；The total area ratio that the hole gross area in all strawberry shape pyrite development microcells accounts for shale microcell is characterized with XC, with XC/Y characterization shale microcell strawberry shape pyrite development hole to the contribution degree of shale total pore space.This method can quantitatively accurately characterize the hole in shale pyrite.
Description
Technical field
The present invention relates to technical field of geological exploration, in particular to shale pyrite hole characterizing method and and answer
With.
Background technique
Scholars many for pyrite in shale have conducted extensive research, and only only a few patent is related to shale pyrite
Research, and mostly in organic shale the determination method of pyrite content and later period pressure break pyrite to also shale matrix
The improvement of permeability and seam net, and rarely have research for pyrite hole characterization.Wherein " pyrite contains patent in organic shale
Method for determination of amount and device " (application number: the content for how measuring pyrite 201711228827.8) is only introduced, for page
Rock pyrite hole characterization does not refer to.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
The purpose of the present invention is to provide the methods that one kind can quantify accurate characterization shale pyrite hole.
The present invention is implemented as follows:
In a first aspect, the embodiment of the present invention provides a kind of shale pyrite hole characterizing method, comprising: determined using power spectrum
Pyrite develops microcell in shale microcell；Calculate in shale microcell, the pyrite development microcell gross area accounts for total face of shale microcell
Product ratio X, the area for calculating all holes in shale microcell account for the total area ratio Y of shale microcell；Calculate in the shale microcell
The ratio between the gross area and all strawberry shape pyrite development microcell gross area of hole in all strawberry shape pyrite development microcells C
It characterizes strawberry shape pyrite and develops microcell Areal porosity；The hole gross area in all strawberry shape pyrite development microcells is characterized with XC
The total area ratio of shale microcell is accounted for, with hole in XC/Y characterization shale microcell strawberry shape pyrite development microcell to total pore space
Contribution degree.
In alternative embodiments, all strawberry shape pyrite development microcell gross areas in the shale microcell are surveyed and are owned
The ratio between the gross area of hole in strawberry shape pyrite development microcell is:
Survey hole in each strawberry shape pyrite development microcell area and strawberry shape pyrite development microcell area it
Compare C0, take the C of all strawberry shape pyrite development microcells in the shale microcell0The average value C of value.
It in alternative embodiments, further include all strawberries for surveying the cutting plane that same sample difference cutting depth obtains
The hole gross area in shape pyrite development microcell accounts for the total area ratio and shale microcell strawberry shape pyrite of shale microcell
Hole in microcell is developed to be averaged the contribution degree of total pore space.
In alternative embodiments, the scanning electron microscope high definition figure obtained according to multiple cutting planes, utilizes digital cores weight
Structure technology is spliced to obtain the three-dimensional distribution figure in pyrite pores'growth space.
In alternative embodiments, it is determined that further include using image analysis processing after the pyrite development microcell
Software demarcates pyrite and develops microcell；Preferably, scaling method is soft using western figure pore character and granularity image analysis system
Part carries out intensity segmentation to the shale micro-structure diagram, and calibration pyrite develops microcell.
In alternative embodiments, pyrite development the microcell gross area account for the shale microcell total area ratio it
Before further include obtain shale micro-structure diagram, acquisition modes be utilize scanning electron microscope shoot micro-structure diagram, scanning electron microscope selection
Field emission scanning electron microscope (FE-SEM) shoots the cutting plane of the good shale samples of cutting, and FE-SEM has high-performance x-ray power spectrum
Instrument can carry out the qualitative of microcell dotted line surface element, sxemiquantitative and the quantitative analysis on sample surface layer simultaneously, have pattern, chemical group
Divide comprehensive analytical capacity.
Preferably, the image that shooting obtains is amplified to a μm-nm scale when observation pyrite development microcell.
In alternative embodiments, before using the cutting plane of the good shale samples of FE-SEM scanning electron microscope shooting cutting
Further include: the cutting plane of shale samples is polished.
In alternative embodiments, polishing mode is argon ion polishing.
Second aspect, the embodiment of the present invention are provided such as the described in any item shale pyrite hole characterizations of aforementioned embodiments
Application of the method in ground quality detection.
The invention has the following advantages:
The characterizing method of shale pyrite provided by the invention, due to measurement pyrite development microcell occupied area and
The pyrite in shale microcell is determined using power spectrum before strawberry shape pyrite development microcell Areal porosity, is avoided that and is surveying
Accidentally non-pyrite development microcell is calculated into pyrite development microcell during fixed, the various spies that shale microcell is shown
The pyrite occupied area of sign is measured, and a step of going forward side by side determines the face of the development microcell of the strawberry shape pyrite in pyrite
Rate makees the Areal porosity of strawberry shape pyrite development microcell when characterizing entire sample to be tested pyrite Areal porosity and contribution degree
For factor it is considered that the characterize data accuracy therefore obtained is high, error is small.
When characterizing method provided by the invention is applied in ground quality detection, geology testing result can be made more acurrate.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is by the schematic diagram of shale samples cutting；
Fig. 2 is the micro image for needing the shale cutting plane measured；
Fig. 3 is to the amplified microgram in region in Fig. 2 there are pyrite；
Fig. 4 is further to the amplified microgram in region in Fig. 3 there are pyrite；
Fig. 5 is that the pyrite of the first shape characteristic develops the microgram of microcell；
Fig. 6 is the energy spectrum diagram that pyrite shown in Fig. 5 develops microcell；
Fig. 7 is that the pyrite of second of shape characteristic develops the microgram of microcell；
Fig. 8 is the energy spectrum diagram that pyrite shown in Fig. 7 develops microcell；
Fig. 9 is that the pyrite of the third shape characteristic develops the microgram of microcell；
Figure 10 is the energy spectrum diagram that pyrite shown in Fig. 9 develops microcell；
Figure 11 is that the pyrite of the 4th kind of shape characteristic develops the microgram of microcell；
Figure 12 is the energy spectrum diagram that pyrite shown in Figure 11 develops microcell；
Figure 13 carries out calibrated microgram to pyrite development microcell in Fig. 2；
Figure 14 is to carry out calibrated microgram to the hole in Fig. 2 in addition to pyrite develops microcell；
Figure 15 is the microgram that a certain strawberry shape pyrite develops microcell region in shale microcell；
Figure 16 is that strawberry shape pyrite develops the schematic diagram after microcell is calibrated in Figure 15；
Figure 17 is the schematic diagram after the hole that strawberry shape pyrite develops in microcell in Figure 15 is calibrated；
Figure 18 is the microgram that other first strawberry shape pyrite develops microcell region in shale microcell；
Figure 19 is the microgram that other second strawberry shape pyrite develops microcell region in shale microcell；
Figure 20 is the distribution of pores situation statistical chart in the development microcell of strawberry shape pyrite shown in Figure 15；
Figure 21 is that a certain embodiment of the application is spliced to obtain pyrite hole hair using digital cores reconfiguration technique
Three-dimensional distribution schematic diagram between Yukon；
Figure 22 is that a certain embodiment of the application is spliced to obtain pyrite hole hair using digital cores reconfiguration technique
Three-dimensional distribution schematic diagram between Yukon；
Figure 23 is that a certain embodiment of the application is spliced to obtain pyrite hole hair using digital cores reconfiguration technique
Three-dimensional distribution schematic diagram between Yukon；
Figure 24 is that the application is spliced to obtain the three-dimensional in pyrite pores'growth space using digital cores reconfiguration technique
The step schematic diagram of spread figure.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Shale pyrite hole characterizing method provided by the embodiments of the present application is specifically described below.
Shale pyrite hole characterizing method provided in an embodiment of the present invention, comprising:
S1, determine that the pyrite in shale microcell develops microcell using power spectrum.
Same shale sample is subjected to cutting by different cutting depth first, obtain it is multiple to test sample, by it is multiple to test sample into
The polishing of row argon ion is conducive to the subsequent various data of measurement so that each cutting plane is apparent.
Pattern each will be shot using FE-SEM scanning electron microscope to test sample, and obtain shale micro image, the figure shot for the first time
Picture as shale microcell.
Shale micro image is amplified to μm-nm scale and observes pyrite therein.Energy spectrum analysis, root are used after amplified
According to the element species that commonly can above show using which diagnostic mineral in the mineral of the doubtful pyrite of determination as pyrite.Then it utilizes
Image analysis software demarcate pyrite develop microcell, in this application used by image analysis software be western figure pore character and
Granularity image analysis system software, to picture carry out intensity segmentation, by pyrite development microcell be demarcated as obvious color so as to
As shown in Figure 12 and Figure 13 in the area for measuring pyrite development microcell, a part of white point is that pyrite develops microcell in Figure 12,
And after demarcating then as shown in RED sector in Figure 13.
S2, it calculates in shale microcell, the pyrite development microcell gross area accounts for the total area ratio X of the shale microcell, meter
Calculate the total area ratio Y that the shale hole area except the pyrite development microcell accounts for the shale microcell.
After having demarcated pyrite development microcell, measure yellow in the shale microcell (i.e. shale micro image shown region)
Iron ore develops the gross area of microcell, which is obtained numerical value X than the gross area of shale microcell.
The gross area in shale hole area in shale microcell is measured, pore region is therein as described in Figure 12 or Figure 13
Black region, it is more accurate to make measurement result, it also can use western figure pore character and granularity image analysis system be soft
Part demarcates hole, and calibration color is red, as shown in Figure 14 and 17-18.Figure 14 show the development of strawberry shape pyrite
Hole except microcell.It is multiple small-sized microcells by shale microcell cutting, each small-sized microcell is further amplified until energy
Tell strawberry shape pyrite development microcell enough to carry out Area computing.Figure 17 to 18 gets the bid red position as strawberry shape pyrite
The pore area in microcell is developed, the hole except strawberry shape pyrite development microcell and the development of strawberry shape pyrite are calculated
The sum of hole gross area in microcell obtains numerical value Y than the shale microcell gross area.
S3, pyrite development microcell include strawberry shape pyrite development microcell, and it is yellow to survey all strawberry shapes in the shale microcell
It is C that iron ore, which develops the ratio between the gross area and all strawberry shape pyrite development microcell gross area of the hole in microcell,.
It is determined in S2 step and obtains the various pyrite development microcells of different-shape feature, including the pyrite of strawberry shape
Microcell is developed, as shown in figure 13.The area for calculating each strawberry shape pyrite development microcell calculates corresponding pyrite hair
The pore area for educating microcell, calculates the Areal porosity of each strawberry shape pyrite development microcell, i.e. strawberry shape develops microcell hole
The area ratio C of area and strawberry shape development microcell0.Since there is the same shale microcell pyrite of multiple strawberry shapes to send out
Microcell is educated, therefore, in order to improve the accuracy of results of measuring, the pyrite of each strawberry shape measured is taken to develop the face of microcell
The average value C of porosity, while C value is also all strawberry shape pyrite development microcell gross areas and all strawberries in the shale microcell
Shape pyrite develops the ratio between the gross area of hole in microcell.
Other than the mode of above-mentioned survey C value, same shale microcell can also be measured to all strawberry shape pyrite developments
The area detecting of all holes in microcell goes out, and then measures all strawberry shape pyrite divided by same shale microcell and develops microcell
Area be added to obtain the gross area of strawberry shape pyrite development microcell and obtain C value.
The total area ratio that the hole gross area in all strawberry shape pyrite development microcells accounts for shale microcell is characterized with XC,
With hole in XC/Y characterization shale microcell strawberry shape pyrite development microcell to the contribution degree of total pore space.
It, can also diameter and area frequency to hole when surveying the pore area of a certain strawberry shape pyrite development microcell
Rate and hole frequency are counted, to determine the main distribution of pore diameter and advantage in strawberry shape pyrite development microcell
The development range of pore diameter.More comprehensively to react hole distribution situation in shale.
Then the scanning electron microscope high definition figure obtained using multiple cutting planes is spliced to obtain Huang using rock core reconfiguration technique
The distribution situation of the more intuitive reaction shale void of the three-dimensional distribution figure in iron ore pores'growth space and pyrite.
Feature and performance of the invention are described in further detail with reference to embodiments.
The standard method of shale samples provided in this embodiment, specific practice are as follows:
By obtained burnt masonry dam Longma small stream group JYX well shale samples along the cutting of different depth direction, cut-away illustration such as Fig. 1
It is shown, the one of sample obtained after cutting is subjected to argon ion polishing, FE-SEM scanning electron microscope is utilized after polishing, obtains page
Rock micro image observes pyrite such as shown in Fig. 2, being then amplified under μm-nm scale to the region in image there are pyrite
Shown in Fig. 3 and Fig. 4.
Then the pyrite in shale samples is determined using power spectrum, as shown in Fig. 5 to Figure 12, Fig. 5,7,9,11 are respectively not
With the pyrite of pattern, and Fig. 6,8,10,12 item are respectively the corresponding energy spectrum diagram of pyrite of different-shape in Fig. 5,7,9,11.
After determining pyrite, using western figure pore character and granularity image analysis system software, picture is indexed
Pyrite development microcell is demarcated as obvious color in order to measure area such as Figure 13 institute of pyrite development microcell by segmentation
Showing, a part of white point is pyrite development microcell in Fig. 2, and after demarcating then as shown in RED sector in Figure 13.It calculates in Figure 13
The gross area is obtained X value 0.52% divided by the gross area of shale microcell by the gross area of RED sector, i.e. pyrite develops microcell
Account for the total area ratio of shale microcell.
The gross area for surveying hole in shale microcell again demarcates hole using same procedure, as being demarcated as red in Figure 14
Region is hole, and the gross area of the hole measured is obtained the page in addition to strawberry shape develops microcell divided by the gross area of shale microcell
Rock total pore surface rate Y value 1.52%.
Found out in shape appearance figure strawberry shape pyrite development microcell, intercept shale microcell in there are the developments of strawberry shape pyrite
A part of region of microcell, as shown in Figure 15 and Figure 16, each strawberry shape develops the area of microcell in mapping, is demarcated as in Figure 16
Red region is then the area of a strawberry shape development microcell.The corresponding pore area for surveying strawberry shape development microcell, such as schemes
It is demarcated as the area of red area shown in 17, in Figure 17 as the pore area in a strawberry shape pyrite development microcell.With same
The mode of sample surveys the pore area and development area of the development microcell of other strawberry shape pyrite in the shale microcell.Mapping 16
The area in red region of getting the bid illustrates the area of strawberry shape pyrite development microcell and is denoted as A, and mapping 17 is got the bid red region
Area is that the area of hole in diagram strawberry shape pyrite development microcell is denoted as B, develops microcell by strawberry shape pyrite of B/A value
Areal porosity.The present embodiment calculates the get the bid area in red region of Figure 16 and accounts for the total face in region shown in Figure 16 in actually measuring and calculating
Product ratio be 19.40%, calculate Figure 17 get the bid red region area account for the ratio of the region gross area shown in Figure 17 be 0.65%,
B/A value is also equal to 0.65% divided by 19.40%, is equal to 3.35%.
The Areal porosity that other strawberry shape pyrite development microcell in same shale microcell is surveyed according to above-mentioned same method, such as schemes
Shown in 18 and Figure 19, Figure 18 and Figure 19 are respectively the structure of other two strawberry shape pyrite development microcell in the shale microcell
Figure.The Areal porosity average value meter C value for finally taking all strawberry shape pyrite development microcells in the shale microcell is 5.4%.
It calculates XC value and is equal to 1.52%, i.e., the hole gross area in all strawberry shape pyrite development microcells accounts for shale microcell
Total area ratio be 1.52%, XC/Y value be 0.52% × 5.4% ÷ 1.52%=1.85%, i.e., shale microcell strawberry shape is yellow
Contribution degree of the hole to total pore space in iron ore development microcell
Using with this implement it is above-mentioned it is identical measurement and calculation method measure other cutting depth shale sample face
Rate and contribution degree, are averaged.
As shown in Figure 17 and Figure 20, in the pore area of the strawberry shape pyrite development microcell of mapping 17, the grass is counted
The distribution of pores situation of certain kind of berries shape pyrite development microcell.As shown in figure 20, Figure 20 has recorded the strawberry shape Huang iron that Figure 17 is shown
Mine develops the frequency of occurrences of the hole of different size diameter in microcell, area cumulative frequency and area frequency, is greater than with frequency
20% develops range for prevailing pores diameter, then prevailing pores diameter is between 40-160nm.In the same way, other are being surveyed
When strawberry shape pyrite develops microcell, corresponding pore diameter distribution situation is also recorded together.
Multiple the scanning electron microscope high-definition images that will be obtained, are spliced to obtain pyrite hole using digital cores reconfiguration technique
Distribution situation such as Figure 21-23 institute of the three-dimensional distribution figure of gap developmenting space as schemed more intuitive reaction shale void and pyrite
Show.Spliced the three-dimensional distribution figure step such as Figure 24 institute for obtaining pyrite pores'growth space using digital cores reconfiguration technique
Show.
In conclusion the present invention provides a kind of shale pyrite hole characterizing method, due in measurement pyrite development
Microcell occupied area and strawberry shape pyrite development microcell Areal porosity before utilize power spectrum to the pyrite in shale microcell into
Row determines, is avoided that in continuous mode and accidentally calculates non-pyrite development microcell into pyrite development microcell, by shale
The pyrite occupied area for the various features that microcell is shown is measured, and a step of going forward side by side determines the Huang of the strawberry shape in pyrite
Iron ore develops the Areal porosity of microcell, when characterizing entire sample to be tested pyrite Areal porosity and contribution degree by strawberry shape pyrite
The Areal porosity of microcell is developed as factor it is considered that the characterize data accuracy therefore obtained is high, and error is small.Further to multiple
The data that cutting plane obtains are spliced to obtain the three-dimensional distribution in pyrite pores'growth space using digital cores reconfiguration technique
Feature.
When characterizing method provided by the invention is applied in ground quality detection, testing result can be made more acurrate.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of shale pyrite hole characterizing method characterized by comprising
Determine that pyrite develops microcell in shale microcell using power spectrum；
Calculate in the shale microcell, the pyrite development microcell gross area accounts for the total area ratio X of the shale microcell, calculates institute
The area for stating all holes in shale microcell accounts for the total area ratio Y of the shale microcell；
Calculate the gross area and all strawberry shape Huang iron of the hole in the shale microcell in all strawberry shape pyrite development microcells
Mine develops the ratio between microcell gross area C and characterizes the strawberry shape pyrite development microcell Areal porosity；
The total area ratio that the hole gross area in all strawberry shape pyrite development microcells accounts for shale microcell is characterized with XC, with
Contribution degree of the hole to total pore space in XC/Y characterization shale microcell strawberry shape pyrite development microcell.
2. shale pyrite hole characterizing method according to claim 1, which is characterized in that survey in the shale microcell and own
Strawberry shape pyrite develops the microcell gross area and the ratio between the gross area of hole in all strawberry shape pyrite development microcell:
Survey the area ratio C of hole in each strawberry shape pyrite development microcell area and strawberry shape pyrite development microcell0,
Take the C of all strawberry shape pyrite development microcells in the shale microcell0The average value C of value.
3. shale pyrite hole characterizing method according to claim 1, which is characterized in that further include surveying same sample not
The hole gross area in all strawberry shape pyrite development microcell of the cutting plane obtained with cutting depth accounts for the total of shale microcell
Hole is averaged the contribution degree of total pore space in area ratio and shale microcell strawberry shape pyrite development microcell.
4. shale pyrite hole characterizing method according to claim 3, which is characterized in that obtained according to multiple cutting planes
Scanning electron microscope high definition figure, spliced to obtain the three-dimensional distribution in pyrite pores'growth space using digital cores reconfiguration technique
Figure.
5. shale pyrite hole characterizing method according to claim 1, which is characterized in that the pyrite hair has been determined
It further include using image analysis processing software calibration pyrite development microcell after educating microcell；
Preferably, scaling method is to utilize western figure pore character and granularity image analysis system software, to shale micro-structure diagram
Intensity segmentation is carried out, calibration pyrite develops microcell.
6. shale pyrite hole characterizing method according to claim 1, which is characterized in that total in pyrite development microcell
The total area ratio that area accounts for the shale microcell further includes obtaining shale micro-structure diagram before, and acquisition modes are to utilize scanning
Electronic Speculum shoots the cutting plane of the good shale samples of cutting；Preferably, the scanning electron microscope is field emission scanning electron microscope.
7. shale pyrite hole characterizing method according to claim 6, which is characterized in that observation pyrite develops microcell
When the obtained image of shooting is amplified to a μm-nm scale.
8. shale pyrite hole characterizing method according to claim 7, which is characterized in that utilize FE-SEM scanning electron microscope
Before the cutting plane for shooting the good shale samples of cutting further include: polished to the cutting plane of shale samples.
9. shale pyrite hole characterizing method according to claim 8, which is characterized in that polishing mode is argon ion throwing
Light.
10. as the described in any item shale pyrite hole characterizing methods of claim 1-9 application in quality detection.
Priority Applications (1)
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| CN112595737A (en) * | 2020-12-09 | 2021-04-02 | 中国科学院地球化学研究所 | Characterization method of occurrence state of gold in Carlin type gold ore |
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