CN109285137A - The acquisition methods and device of shale hole contribution degree - Google Patents
The acquisition methods and device of shale hole contribution degree Download PDFInfo
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- CN109285137A CN109285137A CN201710600742.1A CN201710600742A CN109285137A CN 109285137 A CN109285137 A CN 109285137A CN 201710600742 A CN201710600742 A CN 201710600742A CN 109285137 A CN109285137 A CN 109285137A
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Abstract
The acquisition methods and device of shale hole contribution degree provided by the invention are by being scanned core sample using scanning electron microscope, obtain the scanning electron microscope image of core sample, gray processing processing is carried out to the scanning electron microscope image, binary conversion treatment is carried out to gray processing treated image according to the gray threshold section of preset each component, obtain the bianry image of each component, wherein, the each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral, according to the pixel number of each component of the bianry image of each component, it calculates and obtains organic matter porosity, inorganic mineral porosity and total porosity, according to the organic matter porosity, the inorganic mineral porosity and the total porosity, calculate the contribution degree of the contribution degree and inorganic mineral hole that obtain organic matter hole, so as to realize to different types of The contribution degree of shale hole is obtained, and then provides assessment foundation for the subsequent accurate evaluation to oil-gas reservoir reserves.
Description
Technical field
The present invention relates to oil gas to investigate technology more particularly to a kind of acquisition methods and device of shale hole contribution degree on the spot.
Background technique
With the development of unconventional petroleum resources, shale oil gas is increasingly becoming the emphasis neck that unconventional petroleum resources hair is opened
Domain.
Rammell is the primary structure of oil-gas reservoir storage, and shale therein includes organic substance and inorganic substances, according to development
Position difference shale hole can be divided into organic matter hole and inorganic mineral hole, wherein developing the shale hole on organic substance
Then it is referred to as organic matter hole, the shale hole developed on inorganic substances is then referred to as inorganic mineral hole.Organic matter hole
The percentage that degree accounts for total porosity is then referred to as the contribution degree of organic matter hole, and inorganic mineral porosity accounts for the percentage of total porosity
Than the contribution degree for being then referred to as inorganic mineral hole.During assessing oil-gas reservoir reserves, different types of shale hole
Contribution degree will affect the assessment accuracy of oil-gas reservoir reserves.
In the prior art, the methods of the experiment of pressure mercury, gas absorption experiment and nuclear magnetic resonance experiment is usually used to shale
Hole is measured and is characterized, but these methods also can to the measurement for carrying out porosity of different type hole
Obtain the contribution degree of different types of shale hole.Therefore, in order to carry out accurate evaluation to oil-gas reservoir reserves, how to obtain not
The contribution degree of the shale hole of same type becomes urgent problem to be solved.
Summary of the invention
Aiming at the problem that contribution degree existing in the prior art that can not obtain different types of shale hole, the present invention is mentioned
The acquisition methods and device of a kind of shale hole contribution degree are supplied.
On the one hand, a kind of acquisition methods of shale hole contribution degree provided by the invention, comprising:
Core sample is scanned using scanning electron microscope, obtains the scanning electron microscope image of core sample；
Gray processing processing is carried out to the scanning electron microscope image, according to the gray threshold section of preset each component to gray scale
Change treated image and carry out binary conversion treatment, obtains the bianry image of each component；Wherein, each component includes organic matter hole
Gap, organic matter, inorganic mineral hole and inorganic mineral；
According to the pixel number of each component of the bianry image of each component, calculates and obtain organic matter porosity, inorganic mine
Object porosity and total porosity；
According to the organic matter porosity, the inorganic mineral porosity and the total porosity, calculates and obtain organic matter
The contribution degree of hole and the contribution degree of inorganic mineral hole.
Further, the pixel number of each component of the bianry image according to each component calculates and obtains organic matter
Porosity, inorganic mineral porosity and total porosity, comprising:
Count the pixel number and corresponding total pixel number of each component of the bianry image of each component；
The ratio between the pixel number of each component and corresponding total pixel number are calculated, the area fraction of each component is obtained；Wherein, institute
The area fraction for stating each component includes the face of the area fraction of organic matter hole, the area fraction of organic matter, inorganic mineral hole
The area fraction of fraction and inorganic mineral；
According to the area fraction of the area fraction of organic matter hole and organic matter, calculates and obtain organic matter hole in organic matter
In porosity；
According to the area fraction of the area fraction of inorganic mineral hole and inorganic mineral, calculates acquisition inorganic mineral hole and exist
Porosity in inorganic mineral；
According to porosity of the organic matter hole in organic matter, the density of core sample, the density of organic matter and have
The mass fraction of machine matter calculates and obtains organic matter porosity；
According to porosity of the inorganic mineral hole in inorganic mineral, the density of core sample, inorganic mineral it is close
The mass fraction of degree and inorganic mineral calculates and obtains inorganic mineral porosity；
Calculate the organic matter porosity and the inorganic mineral porosity and, obtain the total porosity.
Further, described according to the area fraction of organic matter hole and the area fraction of organic matter, calculate obtain it is organic
Porosity of the matter hole in organic matter, comprising:
Porosity of the organic matter hole in organic matter is calculated according to formula (1):
Wherein, the θop,oIt is described for porosity of the organic matter hole in organic matterFor the area of organic matter hole
Score, it is describedFor the area fraction of organic matter；
It is described according to the area fraction of inorganic mineral hole and the area fraction of inorganic mineral, calculate and obtain inorganic mineral hole
Porosity of the gap in inorganic mineral, comprising:
Porosity of the inorganic mineral hole in inorganic mineral is calculated according to formula (2):
Wherein, the θmp,mIt is described for porosity of the inorganic mineral hole in inorganic mineralFor inorganic mineral hole
Area fraction, it is describedFor the area fraction of inorganic mineral.
Further, the density, organic of the porosity according to the organic matter hole in organic matter, core sample
The density of matter and the mass fraction of organic matter calculate and obtain organic matter porosity, comprising:
The organic matter porosity is calculated according to formula (3):
Wherein, the θop,sFor organic matter porosity, the ρsFor the density of core sample, the ρoFor the close of organic matter
Degree, the ωoFor the mass fraction of organic matter, the θop,oFor porosity of the organic matter hole in organic matter；
The porosity according to the inorganic mineral hole in inorganic mineral, the density of core sample, inorganic mineral
Density and inorganic mineral mass fraction, calculate obtain inorganic mineral porosity, comprising:
The inorganic mineral porosity is calculated according to formula (4):
Wherein, the θmp,sFor inorganic mineral porosity, the ρsFor the density of core sample, the ρmFor inorganic mineral
Density, the ωmFor the mass fraction of inorganic mineral, the θmp,mFor hole of the inorganic mineral hole in inorganic mineral
Porosity.
Further, described that gray processing processing is carried out to the scanning electron microscope image, according to the gray scale of preset each component
Threshold interval carries out binary conversion treatment to gray processing treated image, obtains the bianry image of each component, comprising:
It is described that gray processing processing is carried out to the scanning electron microscope image, obtain gray level image；
According to the gray threshold section of organic matter hole, the gray threshold section of organic matter, inorganic mineral hole gray scale
The gray threshold section of threshold interval and inorganic mineral carries out binary conversion treatment to the gray level image respectively, and obtains organic
The bianry image of matter hole, the bianry image of organic matter, the bianry image of inorganic mineral hole and inorganic mineral bianry image；
Wherein, the gray threshold section of the organic matter hole be 0 to 13, the gray threshold section 14 to 68 of organic matter,
The gray threshold section 69 to 86 of inorganic mineral hole and the gray threshold section 87 to 255 of inorganic mineral.
Further, the scanning electron microscope is in 569 to 844 times of amplification factor, high vacuum backscatter mode, acceleration voltage
20 kilovolts, core sample is scanned under 11 to 14 millimeters of operating distance of operating condition.
On the other hand, the present invention provides a kind of acquisition device of shale hole contribution degree, comprising:
Receiving module, for receiving the scanning electron microscope image of core sample, the scanning electron microscope (SEM) photograph seems scanning electron microscope pair
Core sample is scanned acquisition；
Bianry image obtains module, for carrying out gray processing processing to the scanning electron microscope image, according to preset each group
Point gray threshold section binary conversion treatment is carried out to gray processing treated image, obtain the bianry image of each component；Wherein,
The each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral；
Processing module calculates for the pixel number according to each component of the bianry image of each component and obtains organic matter
Porosity, inorganic mineral porosity and total porosity；It is also used to according to the organic matter porosity, the inorganic mineral porosity
With the total porosity, the contribution degree of the contribution degree and inorganic mineral hole that obtain organic matter hole is calculated.
Further, the processing module, is specifically used for:
Count the pixel number and corresponding total pixel number of each component of the bianry image of each component；
The ratio between the pixel number of each component and corresponding total pixel number are calculated, the area fraction of each component is obtained；Wherein, institute
The area fraction for stating each component includes the face of the area fraction of organic matter hole, the area fraction of organic matter, inorganic mineral hole
The area fraction of fraction and inorganic mineral；
According to the area fraction of the area fraction of organic matter hole and organic matter, calculates and obtain organic matter hole in organic matter
In porosity；
According to the area fraction of the area fraction of inorganic mineral hole and inorganic mineral, calculates acquisition inorganic mineral hole and exist
Porosity in inorganic mineral；
According to porosity of the organic matter hole in organic matter, the density of core sample, the density of organic matter and have
The mass fraction of machine matter calculates and obtains organic matter porosity；
According to porosity of the inorganic mineral hole in inorganic mineral, the density of core sample, inorganic mineral it is close
The mass fraction of degree and inorganic mineral calculates and obtains inorganic mineral porosity；
Calculate the organic matter porosity and the inorganic mineral porosity and, obtain the total porosity.
Further, the processing module, is specifically used for:
Porosity of the organic matter hole in organic matter is calculated according to formula (1):
Wherein, the θop,oIt is described for porosity of the organic matter hole in organic matterFor the area of organic matter hole
Score, it is describedFor the area fraction of organic matter；
It is described according to the area fraction of inorganic mineral hole and the area fraction of inorganic mineral, calculate and obtain inorganic mineral hole
Porosity of the gap in inorganic mineral, comprising:
Porosity of the inorganic mineral hole in inorganic mineral is calculated according to formula (2):
Wherein, the θmp,mIt is described for porosity of the inorganic mineral hole in inorganic mineralFor inorganic mineral hole
Area fraction, it is describedFor the area fraction of inorganic mineral；
The organic matter porosity is calculated according to formula (3):
Wherein, the θop,sFor organic matter porosity, the ρsFor the density of core sample, the ρoFor the close of organic matter
Degree, the ωoFor the mass fraction of organic matter, the θop,oFor porosity of the organic matter hole in organic matter；
The inorganic mineral porosity is calculated according to formula (4):
Wherein, the θmp,sFor inorganic mineral porosity, the ρsFor the density of core sample, the ρmFor inorganic mineral
Density, the ωmFor the mass fraction of inorganic mineral, the θmp,mFor hole of the inorganic mineral hole in inorganic mineral
Porosity.
Further, the bianry image obtains module, is specifically used for:
It is described that gray processing processing is carried out to the scanning electron microscope image, obtain gray level image；
According to the gray threshold section of organic matter hole, the gray threshold section of organic matter, inorganic mineral hole gray scale
The gray threshold section of threshold interval and inorganic mineral carries out binary conversion treatment to the gray level image respectively, and obtains organic
The bianry image of matter hole, the bianry image of organic matter, the bianry image of inorganic mineral hole and inorganic mineral bianry image；
Wherein, the gray threshold section of the organic matter hole be 0 to 13, the gray threshold section 14 to 68 of organic matter,
The gray threshold section 69 to 86 of inorganic mineral hole and the gray threshold section 87 to 255 of inorganic mineral.
The acquisition methods and device of shale hole contribution degree provided by the invention are by utilizing scanning electron microscope to core sample
It is scanned, obtains the scanning electron microscope image of core sample, gray processing processing is carried out to the scanning electron microscope image, according to default
The gray threshold section of each component binary conversion treatment is carried out to gray processing treated image, obtain the binary map of each component
Picture, wherein each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral, according to each component
Bianry image each component pixel number, calculate and obtain organic matter porosity, inorganic mineral porosity and total porosity, according to
The organic matter porosity, the inorganic mineral porosity and the total porosity calculate the contribution degree for obtaining organic matter hole
With the contribution degree of inorganic mineral hole, so as to realize that the contribution degree to different types of shale hole obtains, in turn
Assessment foundation is provided for the subsequent accurate evaluation to oil-gas reservoir reserves.
Detailed description of the invention
Fig. 1 is the flow diagram of the acquisition methods for the shale hole contribution degree that the embodiment of the present invention one provides；
Fig. 2 is the flow diagram of the acquisition methods of shale hole contribution degree provided by Embodiment 2 of the present invention；
When Fig. 3 (a) is that the acquisition methods of shale hole contribution degree provided by Embodiment 2 of the present invention are applied to core sample
The schematic diagram of the gray level image of core sample obtained；
Fig. 3 (b) is the binary map to organic matter hole obtained after the gray level image progress two-value processing in Fig. 3 (a)
The schematic diagram of picture；
Fig. 3 (c) is the bianry image to organic matter obtained after the gray level image progress two-value processing in Fig. 3 (a)
Schematic diagram；
Fig. 3 (d) is the two-value to inorganic mineral hole obtained after the gray level image progress two-value processing in Fig. 3 (a)
The schematic diagram of image；
Fig. 3 (e) is showing to the bianry image of quartz obtained after the gray level image progress two-value processing in Fig. 3 (a)
It is intended to；
Fig. 3 (f) is the two-value to feldspar obtained after the gray level image progress two-value processing in Fig. 3 (a), clay mineral
The schematic diagram of image；
Fig. 3 (g) is the binary map to carbonate mineral obtained after the gray level image progress two-value processing in Fig. 3 (a)
The schematic diagram of picture；
Fig. 3 (h) is the bianry image to pyrite obtained after the gray level image progress two-value processing in Fig. 3 (a)
Schematic diagram；
Fig. 4 is the structural schematic diagram of the acquisition device for the shale hole contribution degree that the embodiment of the present invention three provides.
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.
Fig. 1 is the flow diagram of the acquisition methods for the shale hole contribution degree that the embodiment of the present invention one provides, such as Fig. 1 institute
Show, which specifically comprises the following steps:
On the one hand, a kind of acquisition methods of shale hole contribution degree provided by the invention, comprising:
Step 101 is scanned core sample using scanning electron microscope, obtains the scanning electron microscope image of core sample.
It should be noted that the executing subject of the acquisition methods of shale hole contribution degree provided by the invention can be a kind of page
The acquisition device of petrosal foramen gap contribution degree, the physics being concretely made of processor, memory, chipset, logic circuit etc.
Structure.
Specifically, in acquisition methods provided by the invention, cutting polishing, polishing etc. first can be carried out to core sample
Reason.Then, core sample is scanned using scanning electron microscope, and obtains the scanning electron microscope image of the core sample.
Wherein, the working condition of the scanning electron microscope specifically may be configured as: dissipate in 569 to 844 times of amplification factor, high vacuum back
Emission mode, 20 kilovolts of acceleration voltage, 11 to 14 millimeters of operating distance, so that the scanning electron microscope image that the present invention obtains easily facilitates
Subsequent processing.
Preferably, before step 101, the step of may also include the selection to rock core sample can specifically put low
Each alternative rock core of big multiplying power electricity microscopic observation, and it is metastable, each therefrom to choose each diagenesis uniform component distribution, mineral shape
The rock core for the features such as anisotropy is smaller and geology Geochemistry Parameters are moderate is as core sample, to may make the core sample of acquisition
It is able to reflect the pore structure characteristic of rammell entirety.
Step 102 carries out gray processing processing to scanning electron microscope image, according to the gray threshold section pair of preset each component
Gray processing treated image carries out binary conversion treatment, obtains the bianry image of each component.
Specifically, due to scanning electron microscope image-forming principle be using focus very thin high-power electron beam in rock core sample
On be scanned, excite and present the various physical messages of the rock core sample, wherein the brightness of scanning electron microscope image is with atom
The increase of ordinal number and increase, that is to say, that scanning electron microscope image corresponding with the component of the high atomic number in core sample is
Clear zone, scanning electron microscope image corresponding with the component of the low atomic number in core sample are dark space, and by Electronic Speculum signal resolution
Rate is limited, and the surrounding's mineral atom for surrounding hole is different, and hole light and shade is also different.
Therefore, based on the above principles, technical solution provided by the invention can first carry out at gray processing scanning electron microscope image
Reason, to obtain the gray value of each pixel in scanning electron microscope image.Then, in order to groups different in gray processing treated image
Subregion is clearly divided, using the gray threshold section of preset each component, to gray processing treated image into
Row binary conversion treatment, and obtain the bianry image of each component.Wherein, each component includes organic matter hole, organic matter, inorganic mine
Object hole and inorganic mineral, correspondingly, this step obtain each component bianry image include organic matter hole bianry image,
Bianry image, the bianry image of inorganic mineral hole and the bianry image of inorganic mineral of organic matter.It is therein, the ash of each component
Degree threshold interval can be set based on experience value, and the gray threshold section of each component is continuous and is not overlapped.
Step 103, the pixel number according to each component of the bianry image of each component, calculate and obtain organic matter porosity, nothing
Machine mineral porosity and total porosity.
Step 104, according to organic matter porosity, inorganic mineral porosity and total porosity, calculate and obtain organic matter hole
Contribution degree and inorganic mineral hole contribution degree.
Specifically, in step 103 and step 104, can to step 102 obtain organic matter hole bianry image,
The pixel number of the bianry image of organic matter, the bianry image of inorganic mineral hole and each component in the bianry image of inorganic mineral
It is counted, and calculates organic matter porosity, inorganic mineral porosity and total pore space using the pixel number of each component counted
Degree.Then, the percentage that total porosity can be accounted for by calculating organic matter porosity, obtains the contribution degree of organic matter hole, calculates
Inorganic mineral porosity accounts for the percentage of total porosity, obtains the contribution degree of inorganic mineral hole.
The acquisition methods of shale hole contribution degree provided by the invention, by being swept using scanning electron microscope to core sample
It retouches, obtains the scanning electron microscope image of core sample, gray processing processing is carried out to the scanning electron microscope image, according to preset each group
Point gray threshold section binary conversion treatment is carried out to gray processing treated image, obtain the bianry image of each component, wherein
The each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral, according to the binary map of each component
The pixel number of each component of picture calculates and obtains organic matter porosity, inorganic mineral porosity and total porosity, according to described organic
Matter porosity, the inorganic mineral porosity and the total porosity calculate the contribution degree and inorganic mine for obtaining organic matter hole
The contribution degree of object hole so as to realize that the contribution degree to different types of shale hole obtains, and then is subsequent right
The accurate evaluation of oil-gas reservoir reserves provides assessment foundation.
The acquisition methods of the shale hole contribution degree provided in order to which the present invention is further explained, embodiment shown in Fig. 1
On the basis of, Fig. 2 is the flow diagram of the acquisition methods of shale hole contribution degree provided by Embodiment 2 of the present invention.
As shown in Fig. 2, the acquisition methods include:
Step 201 is scanned core sample using scanning electron microscope, obtains the scanning electron microscope image of core sample.
It specifically, similarly with the step 101 of embodiment one, can be first right in acquisition methods provided by the invention
Core sample carries out the processing such as cutting polishing, polishing.Then, core sample is scanned using scanning electron microscope, and is somebody's turn to do
The scanning electron microscope image of core sample.
Wherein, the working condition of the scanning electron microscope specifically may be configured as: dissipate in 569 to 844 times of amplification factor, high vacuum back
Emission mode, 20 kilovolts of acceleration voltage, 11 to 14 millimeters of operating distance, so that the scanning electron microscope image that the present invention obtains easily facilitates
Subsequent processing.
Preferably, it before step 201, the step of may also include the selection to rock core sample, specifically, can be put low
Each alternative rock core of big multiplying power electricity microscopic observation, and it is metastable, each therefrom to choose each diagenesis uniform component distribution, mineral shape
The rock core for the features such as anisotropy is smaller and geology Geochemistry Parameters are moderate is as core sample, to may make the core sample of acquisition
It is able to reflect the pore structure characteristic of rammell entirety.
Step 202 carries out gray processing processing to scanning electron microscope image, obtains gray level image.
Step 203, according to the gray threshold section of organic matter hole, the gray threshold section of organic matter, inorganic mineral hole
The gray threshold section of gap and the gray threshold section of inorganic mineral carry out binary conversion treatment to gray level image respectively, and obtain
The two-value of the bianry image of organic matter hole, the bianry image of organic matter, the bianry image of inorganic mineral hole and inorganic mineral
Image.
Step 202 and step 203 are to realize to carry out gray processing processing to scanning electron microscope image, according to preset each component
Gray threshold section carries out binary conversion treatment to gray processing treated image, obtains a kind of realization of the bianry image of each component
Mode.
Specifically, gray proces are carried out to scanning electron microscope image first, that is to say, that by colored scanning electron microscope image
The rgb color value of each pixel is converted into the gray value between 0~255, obtains gray level image, wherein gray value is got over
High pixel color is deeper.Then, binary conversion treatment is carried out to gray level image according to preset gray threshold section, wherein each group
The gray threshold section divided is determined according to the grey value difference of different aperture and rock constituents, wherein is divided into for each group
For the case where organic matter hole, organic matter, inorganic mineral hole and inorganic mineral, the gray threshold section of organic matter hole is
0 to 13, the gray threshold section 14 to 68 of organic matter, the gray threshold section 69 to 86 of inorganic mineral hole and inorganic mineral
Gray threshold section 87 to 255.
For example, Fig. 3 (a) is that the acquisition methods of shale hole contribution degree provided by Embodiment 2 of the present invention are applied to rock
The schematic diagram of the gray level image of core sample obtained when heart sample, Fig. 3 (b) to Fig. 3 (h) are respectively to be obtained to Fig. 3 (a)
Gray level image carry out the schematic diagram of the bianry image of each component obtained after two-value processing.
Specifically, Fig. 3 (b) is that organic matter hole obtained after two-value processing is carried out to the gray level image in Fig. 3 (a)
Bianry image schematic diagram, set 0 to 13 for the gray threshold section of organic matter hole, and carry out at two-value to Fig. 3 (a)
Reason obtains Fig. 3 (b).Correspondingly, Fig. 3 (c) is to carry out organic matter obtained after two-value processing to the gray level image in Fig. 3 (a)
Bianry image schematic diagram, set 14 to 68 for the gray threshold section of organic matter, and two-value processing is carried out to Fig. 3 (a),
It obtains Fig. 3 (c)；Fig. 3 (d) is two to inorganic mineral hole obtained after the gray level image progress two-value processing in Fig. 3 (a)
It is worth the schematic diagram of image, sets 69 to 86 for the gray threshold section of inorganic mineral hole, and carry out at two-value to Fig. 3 (a)
Reason obtains Fig. 3 (d).
In addition, Fig. 3 (e) to Fig. 3 (h) is the bianry image of the inorganic mineral of core sample, it should be noted that the rock core
Inorganic mineral in sample is specifically made of quartz, feldspar, clay mineral, carbonate mineral and pyrite, in order to obtain more
The bianry image of accurate inorganic mineral can carry out two-value processing to every kind of inorganic mineral components respectively.Fig. 3 (e) is to Fig. 3
(a) gray level image in carries out the schematic diagram of the bianry image of quartz obtained after two-value processing, by quartzy gray threshold
Section is set as 87 to 108, and carries out two-value processing to Fig. 3 (a), obtains Fig. 3 (e)；Fig. 3 (f) is to the gray scale in Fig. 3 (a)
Image carry out feldspar obtained after two-value processing, clay mineral bianry image schematic diagram, by feldspar, the ash of clay mineral
Degree threshold interval is set as 109 to 129, and carries out two-value processing to Fig. 3 (a), obtains Fig. 3 (f)；Fig. 3 (g) is in Fig. 3 (a)
Gray level image carry out the schematic diagram of the bianry image of carbonate mineral obtained after two-value processing, by the ash of carbonate mineral
Degree threshold interval is set as 130 to 232, and carries out two-value processing to Fig. 3 (a), obtains Fig. 3 (g)；Fig. 3 (h) is in Fig. 3 (a)
Gray level image carry out the schematic diagram of the bianry image of pyrite obtained after two-value processing, by the gray threshold area of pyrite
Between be set as 233 to 255, and two-value processing is carried out to Fig. 3 (a), obtained Fig. 3 (h).
Step 204, count each component bianry image each component pixel number and corresponding total pixel number.
The ratio between step 205, the pixel number for calculating each component and corresponding total pixel number, obtain the Line Integral of each component
Number.
Specifically, since bianry image is two-dimensional black white image, the pixel value of each pixel is generally 0 or 255.Cause
This can carry out the statistics of pixel number, furthermore, it is understood that can divide in step 204 and step 205 for each bianry image
The pixel number that wherein pixel value is 255 is not counted, these pixels that wherein pixel value is 255 indicate the page in the bianry image
The component of rock, in addition, also needing the total pixel number in statistics bianry image.Then, calculate component pixel number and total pixel number it
Than the ratio is then the area fraction of the component, i.e. the acquisition area fraction of organic matter hole, the area fraction of organic matter, nothing
The area fraction of machine mineral hole and the area fraction of inorganic mineral.
Furthermore, it is understood that calculating each component obtained by using the above method in above-mentioned Fig. 3 (b) into Fig. 3 (h)
Area fraction to be respectively as follows: the area fraction of organic matter hole be 0.133%, the area fraction of organic matter is 1.903%, inorganic
The area fraction of mineral hole is 3.528%, and quartzy area fraction is 57.631%, the area fraction of feldspar and clay mineral
It is 31.413%, the area fraction of carbonate mineral is 4.192%, and the area fraction of pyrite is 1.190%.
Step 206, according to the area fraction of organic matter hole and the area fraction of organic matter, calculate and obtain organic matter hole
Porosity in organic matter.
Acquisition organic matter can be calculated using the area fraction of the organic matter hole of above-mentioned acquisition and the area fraction of organic matter
Porosity of the hole in organic matter specifically can calculate hole of the organic matter hole in organic matter according to formula (1)
Degree:
Wherein, θop,oFor porosity of the organic matter hole in organic matter,For the area fraction of organic matter hole,For
The area fraction of organic matter.
Step 207, according to the area fraction of inorganic mineral hole and the area fraction of inorganic mineral, calculate and obtain inorganic mine
Porosity of the object hole in inorganic mineral.
Using the area fraction of the inorganic mineral hole of above-mentioned acquisition and the area fraction of inorganic mineral, it is inorganic to calculate acquisition
Porosity of the mineral hole in inorganic mineral specifically can calculate inorganic mineral hole in inorganic mineral according to formula (2)
In porosity:
Wherein, θmp,mFor porosity of the inorganic mineral hole in inorganic mineral,For the Line Integral of inorganic mineral hole
Number,For the area fraction of inorganic mineral.
Step 208, according to density, the density of organic matter of porosity of the organic matter hole in organic matter, core sample
With the mass fraction of organic matter, calculates and obtain organic matter porosity.
Specifically, organic matter porosity can be calculated according to formula (3):
Wherein, θop,sFor organic matter porosity, ρsFor the density of core sample, ρoFor the density of organic matter, ωoIt is organic
The mass fraction of matter, θop,oFor porosity of the organic matter hole in organic matter.
Step 209, according to porosity of the inorganic mineral hole in inorganic mineral, the density of core sample, inorganic mineral
Density and inorganic mineral mass fraction, calculate obtain inorganic mineral porosity.
Specifically, inorganic mineral porosity is calculated according to formula (4):
Wherein, θmp,sFor inorganic mineral porosity, ρsFor the density of core sample, ρmFor the density of inorganic mineral, ωmFor
The mass fraction of inorganic mineral, θmp,mFor porosity of the inorganic mineral hole in inorganic mineral.
It should be noted that the density of core sample, the density of organic matter has in above-mentioned steps 208 and step 209
The mass fraction of machine matter, the density of the inorganic mineral and mass fraction of inorganic mineral can be measured to rock core sample and test obtains
It takes, is the intrinsic parameter of the rock core sample, the present invention is not limited its acquisition methods.
Step 210, calculate organic matter porosity and inorganic mineral porosity and, obtain total porosity.
Summation operation is carried out using the organic matter porosity and inorganic mineral porosity obtained in step 208 and step 209,
To obtain the total porosity of core sample.
Step 211, according to organic matter porosity, inorganic mineral porosity and total porosity, calculate and obtain organic matter hole
Contribution degree and inorganic mineral hole contribution degree.
Specifically, the ratio of organic matter porosity and total porosity is calculated, the ratio for calculating acquisition is then organic matter hole
The contribution degree of gap.Similar, the ratio of inorganic mineral porosity and total porosity is calculated, the ratio for calculating acquisition is then inorganic mine
The contribution degree of object hole.
Furthermore, it is understood that calculating the tribute of the organic matter hole of acquisition in the rock core sample corresponding to above-mentioned Fig. 3 (a)
Degree of offering is 47.94%, and the contribution degree of inorganic mineral hole is 52.06%.
The acquisition methods of shale hole contribution degree provided by Embodiment 2 of the present invention on the basis of example 1, also provide
Acquisition organic matter hole contribution degree and inorganic mineral contribution degree calculation method, and two are carried out to gray level image
The threshold interval used required for value processing, automatically obtains the contribution degree of different types of shale hole to can realize
It takes, improves and obtain efficiency and obtain precision, and then provide assessment foundation for the subsequent accurate evaluation to oil-gas reservoir reserves.
Fig. 4 is the structural schematic diagram of the acquisition device for the shale hole contribution degree that the embodiment of the present invention three provides.Such as Fig. 4 institute
Show, which includes:
Receiving module 10, for receiving the scanning electron microscope image of core sample, scanning electron microscope (SEM) photograph seems scanning electron microscope to rock
Heart sample is scanned acquisition；
Bianry image obtains module 20, for carrying out gray processing processing to scanning electron microscope image, according to preset each component
Gray threshold section binary conversion treatment is carried out to gray processing treated image, obtain the bianry image of each component.
Wherein, each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral.
Processing module 30 calculates for the pixel number according to each component of the bianry image of each component and obtains organic matter hole
Porosity, inorganic mineral porosity and total porosity；It is also used to according to organic matter porosity, inorganic mineral porosity and total pore space
Degree calculates the contribution degree of the contribution degree and inorganic mineral hole that obtain organic matter hole.
Further, processing module 30 are specifically used for: counting the pixel number of each component of the bianry image of each component and right
The total pixel number answered；The ratio between the pixel number of each component and corresponding total pixel number are calculated, the area fraction of each component is obtained；Its
In, the area fraction of each component includes the face of the area fraction of organic matter hole, the area fraction of organic matter, inorganic mineral hole
The area fraction of fraction and inorganic mineral；According to the area fraction of the area fraction of organic matter hole and organic matter, calculating is obtained
Obtain porosity of the organic matter hole in organic matter；According to the Line Integral of the area fraction of inorganic mineral hole and inorganic mineral
Number calculates the porosity for obtaining inorganic mineral hole in inorganic mineral；According to porosity of the organic matter hole in organic matter,
The mass fraction of the density of core sample, the density of organic matter and organic matter calculates and obtains organic matter porosity；According to inorganic mine
The mass fraction of porosity of the object hole in inorganic mineral, the density of core sample, the density of inorganic mineral and inorganic mineral,
It calculates and obtains inorganic mineral porosity；Calculate organic matter porosity and inorganic mineral porosity and, acquisition total porosity.
Furthermore, it is understood that processing module 30, is specifically used for:
Porosity of the organic matter hole in organic matter is calculated according to formula (1):
Wherein, θop,oFor porosity of the organic matter hole in organic matter,For the area fraction of organic matter hole,For
The area fraction of organic matter；
According to the area fraction of the area fraction of inorganic mineral hole and inorganic mineral, calculates acquisition inorganic mineral hole and exist
Porosity in inorganic mineral, comprising:
Porosity of the inorganic mineral hole in inorganic mineral is calculated according to formula (2):
Wherein, θmp,mFor porosity of the inorganic mineral hole in inorganic mineral,For the Line Integral of inorganic mineral hole
Number,For the area fraction of inorganic mineral；
Organic matter porosity is calculated according to formula (3):
Wherein, θop,sFor organic matter porosity, ρsFor the density of core sample, ρoFor the density of organic matter, ωoIt is organic
The mass fraction of matter, θop,oFor porosity of the organic matter hole in organic matter；
Inorganic mineral porosity is calculated according to formula (4):
Wherein, θmp,sFor inorganic mineral porosity, ρsFor the density of core sample, ρmFor the density of inorganic mineral, ωmFor
The mass fraction of inorganic mineral, θmp,mFor porosity of the inorganic mineral hole in inorganic mineral.
Further, bianry image obtains module 20, is specifically used for:
Gray processing processing is carried out to scanning electron microscope image, obtains gray level image；
According to the gray threshold section of organic matter hole, the gray threshold section of organic matter, inorganic mineral hole gray scale
The gray threshold section of threshold interval and inorganic mineral carries out binary conversion treatment to gray level image respectively, and obtains organic matter hole
The bianry image of gap, the bianry image of organic matter, the bianry image of inorganic mineral hole and inorganic mineral bianry image；
Wherein, the gray threshold section of organic matter hole be 0 to 13, the gray threshold section 14 to 68 of organic matter, it is inorganic
The gray threshold section 69 to 86 of mineral hole and the gray threshold section 87 to 255 of inorganic mineral.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
The acquisition device of shale hole contribution degree provided by the invention, by being swept using scanning electron microscope to core sample
It retouches, obtains the scanning electron microscope image of core sample, gray processing processing is carried out to the scanning electron microscope image, according to preset each group
Point gray threshold section binary conversion treatment is carried out to gray processing treated image, obtain the bianry image of each component, wherein
The each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral, according to the binary map of each component
The pixel number of each component of picture calculates and obtains organic matter porosity, inorganic mineral porosity and total porosity, according to described organic
Matter porosity, the inorganic mineral porosity and the total porosity calculate the contribution degree and inorganic mine for obtaining organic matter hole
The contribution degree of object hole so as to realize that the contribution degree to different types of shale hole obtains, and then is subsequent right
The accurate evaluation of oil-gas reservoir reserves provides assessment foundation.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of acquisition methods of shale hole contribution degree characterized by comprising
Core sample is scanned using scanning electron microscope, obtains the scanning electron microscope image of core sample；
To the scanning electron microscope image carry out gray processing processing, according to the gray threshold section of preset each component to gray processing at
Image after reason carries out binary conversion treatment, obtains the bianry image of each component；Wherein, each component include organic matter hole,
Organic matter, inorganic mineral hole and inorganic mineral；
According to the pixel number of each component of the bianry image of each component, calculates and obtain organic matter porosity, inorganic mineral hole
Porosity and total porosity；
According to the organic matter porosity, the inorganic mineral porosity and the total porosity, calculates and obtain organic matter hole
Contribution degree and inorganic mineral hole contribution degree.
2. acquisition methods according to claim 1, which is characterized in that the bianry image according to each component it is each
The pixel number of component calculates and obtains organic matter porosity, inorganic mineral porosity and total porosity, comprising:
Count the pixel number and corresponding total pixel number of each component of the bianry image of each component；
The ratio between the pixel number of each component and corresponding total pixel number are calculated, the area fraction of each component is obtained；Wherein, described each
The area fraction of component includes the Line Integral of the area fraction of organic matter hole, the area fraction of organic matter, inorganic mineral hole
Several and inorganic mineral area fraction；
According to the area fraction of the area fraction of organic matter hole and organic matter, calculates and obtain organic matter hole in organic matter
Porosity；
According to the area fraction of the area fraction of inorganic mineral hole and inorganic mineral, calculates and obtain inorganic mineral hole inorganic
Porosity in mineral；
According to porosity, the density of core sample, the density of organic matter and organic matter of the organic matter hole in organic matter
Mass fraction, calculate obtain organic matter porosity；
According to porosity of the inorganic mineral hole in inorganic mineral, the density of core sample, the density of inorganic mineral and
The mass fraction of inorganic mineral calculates and obtains inorganic mineral porosity；
Calculate the organic matter porosity and the inorganic mineral porosity and, obtain the total porosity.
3. acquisition methods according to claim 2, which is characterized in that the area fraction according to organic matter hole and have
The area fraction of machine matter calculates the porosity for obtaining organic matter hole in organic matter, comprising:
Porosity of the organic matter hole in organic matter is calculated according to formula (1):
Wherein, the θop,oIt is described for porosity of the organic matter hole in organic matterFor the area fraction of organic matter hole,
It is describedFor the area fraction of organic matter；
It is described to obtain inorganic mineral hole with the area fraction of inorganic mineral, calculating according to the area fraction of inorganic mineral hole and exist
Porosity in inorganic mineral, comprising:
Porosity of the inorganic mineral hole in inorganic mineral is calculated according to formula (2):
Wherein, the θmp,mIt is described for porosity of the inorganic mineral hole in inorganic mineralFor the face of inorganic mineral hole
Fraction, it is describedFor the area fraction of inorganic mineral.
4. acquisition methods according to claim 2, which is characterized in that it is described according to the organic matter hole in organic matter
Porosity, the density of core sample, the density of organic matter and organic matter mass fraction, calculate obtain organic matter porosity,
Include:
The organic matter porosity is calculated according to formula (3):
Wherein, the θop,sFor organic matter porosity, the ρsFor the density of core sample, the ρoFor the density of organic matter, institute
State ωoFor the mass fraction of organic matter, the θop,oFor porosity of the organic matter hole in organic matter；
The porosity according to the inorganic mineral hole in inorganic mineral, the density of core sample, inorganic mineral it is close
The mass fraction of degree and inorganic mineral calculates and obtains inorganic mineral porosity, comprising:
The inorganic mineral porosity is calculated according to formula (4):
Wherein, the θmp,sFor inorganic mineral porosity, the ρsFor the density of core sample, the ρmFor the close of inorganic mineral
Degree, the ωmFor the mass fraction of inorganic mineral, the θmp,mFor porosity of the inorganic mineral hole in inorganic mineral.
5. acquisition methods according to claim 1, which is characterized in that described to carry out gray processing to the scanning electron microscope image
Processing carries out binary conversion treatment to gray processing treated image according to the gray threshold section of preset each component, obtains each
The bianry image of component, comprising:
It is described that gray processing processing is carried out to the scanning electron microscope image, obtain gray level image；
According to the gray threshold section of organic matter hole, the gray threshold section of organic matter, inorganic mineral hole gray threshold
The gray threshold section in section and inorganic mineral carries out binary conversion treatment to the gray level image respectively, and obtains organic matter hole
The bianry image of gap, the bianry image of organic matter, the bianry image of inorganic mineral hole and inorganic mineral bianry image；
Wherein, the gray threshold section of the organic matter hole be 0 to 13, the gray threshold section 14 to 68 of organic matter, it is inorganic
The gray threshold section 69 to 86 of mineral hole and the gray threshold section 87 to 255 of inorganic mineral.
6. acquisition methods according to claim 1, which is characterized in that the scanning electron microscope is in amplification factor 569 to 844
Times, under high vacuum backscatter mode, 20 kilovolts of acceleration voltage, 11 to 14 millimeters of operating distance of operating condition to core sample into
Row scanning.
7. a kind of acquisition device of shale hole contribution degree characterized by comprising
Receiving module, for receiving the scanning electron microscope image of core sample, the scanning electron microscope (SEM) photograph seems scanning electron microscope to rock core
Sample is scanned acquisition；
Bianry image obtains module, for carrying out gray processing processing to the scanning electron microscope image, according to preset each component
Gray threshold section carries out binary conversion treatment to gray processing treated image, obtains the bianry image of each component；Wherein, described
Each component includes organic matter hole, organic matter, inorganic mineral hole and inorganic mineral；
Processing module calculates for the pixel number according to each component of the bianry image of each component and obtains organic matter hole
Degree, inorganic mineral porosity and total porosity；It is also used to according to the organic matter porosity, the inorganic mineral porosity and institute
Total porosity is stated, the contribution degree of the contribution degree and inorganic mineral hole that obtain organic matter hole is calculated.
8. acquisition device according to claim 7, which is characterized in that the processing module is specifically used for:
Count the pixel number and corresponding total pixel number of each component of the bianry image of each component；
The ratio between the pixel number of each component and corresponding total pixel number are calculated, the area fraction of each component is obtained；Wherein, described each
The area fraction of component includes the Line Integral of the area fraction of organic matter hole, the area fraction of organic matter, inorganic mineral hole
Several and inorganic mineral area fraction；
According to the area fraction of the area fraction of organic matter hole and organic matter, calculates and obtain organic matter hole in organic matter
Porosity；
According to the area fraction of the area fraction of inorganic mineral hole and inorganic mineral, calculates and obtain inorganic mineral hole inorganic
Porosity in mineral；
According to porosity, the density of core sample, the density of organic matter and organic matter of the organic matter hole in organic matter
Mass fraction, calculate obtain organic matter porosity；
According to porosity of the inorganic mineral hole in inorganic mineral, the density of core sample, the density of inorganic mineral and
The mass fraction of inorganic mineral calculates and obtains inorganic mineral porosity；
Calculate the organic matter porosity and the inorganic mineral porosity and, obtain the total porosity.
9. acquisition device according to claim 8, which is characterized in that the processing module is specifically used for:
Porosity of the organic matter hole in organic matter is calculated according to formula (1):
Wherein, the θop,oIt is described for porosity of the organic matter hole in organic matterFor the area fraction of organic matter hole,
It is describedFor the area fraction of organic matter；
Porosity of the inorganic mineral hole in inorganic mineral is calculated according to formula (2):
Wherein, the θmp,mIt is described for porosity of the inorganic mineral hole in inorganic mineralFor the face of inorganic mineral hole
Fraction, it is describedFor the area fraction of inorganic mineral；
The organic matter porosity is calculated according to formula (3):
Wherein, the θop,sFor organic matter porosity, the ρsFor the density of core sample, the ρoFor the density of organic matter, institute
State ωoFor the mass fraction of organic matter, the θop,oFor porosity of the organic matter hole in organic matter；
The inorganic mineral porosity is calculated according to formula (4):
Wherein, the θmp,sFor inorganic mineral porosity, the ρsFor the density of core sample, the ρmFor the close of inorganic mineral
Degree, the ωmFor the mass fraction of inorganic mineral, the θmp,mFor porosity of the inorganic mineral hole in inorganic mineral.
10. acquisition device according to claim 7, which is characterized in that the bianry image obtains module, is specifically used for:
It is described that gray processing processing is carried out to the scanning electron microscope image, obtain gray level image；
According to the gray threshold section of organic matter hole, the gray threshold section of organic matter, inorganic mineral hole gray threshold
The gray threshold section in section and inorganic mineral carries out binary conversion treatment to the gray level image respectively, and obtains organic matter hole
The bianry image of gap, the bianry image of organic matter, the bianry image of inorganic mineral hole and inorganic mineral bianry image；
Wherein, the gray threshold section of the organic matter hole be 0 to 13, the gray threshold section 14 to 68 of organic matter, it is inorganic
The gray threshold section 69 to 86 of mineral hole and the gray threshold section 87 to 255 of inorganic mineral.
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| WO2024119528A1 (en) * | 2022-12-07 | 2024-06-13 | 中国石油天然气股份有限公司 | Rock core sample analysis method and system, and electronic device and storage medium |
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Application publication date: 20190129 |