CN108760596B - Method and device for measuring adsorption capacity of coal rock in predetermined area - Google Patents
Method and device for measuring adsorption capacity of coal rock in predetermined area Download PDFInfo
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- CN108760596B CN108760596B CN201810121720.1A CN201810121720A CN108760596B CN 108760596 B CN108760596 B CN 108760596B CN 201810121720 A CN201810121720 A CN 201810121720A CN 108760596 B CN108760596 B CN 108760596B
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 110
- 239000003245 coal Substances 0.000 title claims abstract description 101
- 239000011435 rock Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000015654 memory Effects 0.000 claims description 14
- 239000004079 vitrinite Substances 0.000 claims description 13
- 229920002101 Chitin Polymers 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 5
- 238000002310 reflectometry Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
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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
- G01N2015/0866—Sorption
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Abstract
The invention discloses a method and a device for measuring the adsorption capacity of coal rocks in a predetermined area, wherein the measuring method comprises the steps of obtaining the coal rocks at a plurality of positions of the predetermined area; obtaining the micro-components of each coal rock and the proportion of each micro-component of the coal rock; obtaining the individual adsorption quantity of each component of the coal rock according to the relation curve graph of the individual adsorption quantity of each component and the temperature environment of the coal rock; calculating the total adsorption quantity of the corresponding position of each coal rock according to the occupation ratio and the single adsorption quantity; and obtaining an adsorption quantity distribution map of the predetermined area according to the total adsorption quantity of each coal rock. By the measuring method, the adsorption of the coal rock can be predicted based on the microscopic combination. The measuring method only needs to prospecting and mining a plurality of coal rocks in a preset area, namely, the microscopic components can be analyzed and adsorbed and measured by the measuring method, so that the reservoir performance of the coal rocks can be evaluated more accurately.
Description
Technical Field
The invention relates to the technical field of coal rock experiments, in particular to a method and a device for measuring the adsorption capacity of coal rocks in a predetermined area.
Background
In the prior art, all coal rock isothermal measurement methods are gradually measured through tests, the efficiency of the measurement method is low, and no method capable of predicting coal rock adsorption exists in the prior art. Because the adsorption quantity of the coal rock and the reservoir performance of the coal rock are closely related, the reservoir performance of the coal rock can be accurately evaluated after the adsorption quantity of the coal rock is obtained.
Disclosure of Invention
The embodiment of the invention provides a method and a device for measuring the adsorption capacity of coal rocks in a predetermined area.
In order to achieve the above object, the present invention provides a method for measuring the adsorption capacity of coal rock in a predetermined area, comprising the following steps:
step S1: acquiring coal rocks at a plurality of positions of a predetermined area;
step S2: obtaining the micro-components of the coal rocks and the proportion of the micro-components of the coal rocks;
step S3: obtaining the individual adsorption quantity of each component of the coal rock according to the relation curve graph of the individual adsorption quantity of each component and the temperature environment of the coal rock;
step S4: calculating the total adsorption quantity of the position corresponding to each coal rock according to the ratio and the single adsorption quantity;
step S5: and obtaining an adsorption quantity distribution map of a predetermined area according to the total adsorption quantity of each coal rock.
Preferably, the step S4 includes the following steps:
multiplying the individual adsorption quantity of each component by the ratio to obtain an intermediate value;
and summing all the intermediate values to obtain the total adsorption capacity of the coal rock.
Preferably, the different components of the microscopic component comprise: vitrinite group, inertinite group, and chitin group.
Preferably, the ratio of the vitrinite is A1, the ratio of the inertinite is A2, and the ratio of the chitin is A3;
the single adsorption amount of the vitrinite is V1, the single adsorption amount of the inertinite is V2, and the single adsorption amount of the chitin is V3;
the total adsorption quantity of the coal rock is V0, and the formula for calculating the total adsorption quantity of the coal rock is as follows:
V0＝(A1×V1)+(A2×V2)+(A3×V3)。
preferably, step 3 comprises the following steps:
carrying out adsorption measurement on a component at different preset temperatures;
obtaining the individual adsorption amounts at different temperatures to generate a graph of the relationship of the components.
Preferably, between the step S4 and the step S5, the following steps are further included:
step S6: circularly performing the step S3 at different temperatures to obtain the total adsorption quantity of the coal rock at different temperatures;
step S7: and obtaining the adsorption capacity of the coal rocks at different depths of the predetermined area according to the total adsorption capacity of the coal rocks at different temperatures.
Preferably, step S1 includes obtaining coal rocks at different depths in the predetermined area.
Preferably, the method for obtaining the individual adsorption amounts of the components in the step S3 is obtained by using national standard of high-pressure isothermal adsorption test method of GB/T195602008 coal.
The embodiment of the application discloses a measuring device, which comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the measuring method is realized.
By the measuring method, the adsorption of the coal rock can be predicted based on the microscopic combination. The measuring method only needs to prospecting and mining a plurality of coal rocks in a preset area, namely, the microscopic components can be analyzed and adsorbed and measured by the measuring method, so that the reservoir performance of the coal rocks can be evaluated more accurately.
Drawings
FIG. 1 is a schematic diagram of a method for measuring the amount of coal rock adsorbed in a predetermined area according to an embodiment of the present invention;
FIG. 2 is a graph showing the relationship between the amount V1 of single adsorption of vitrinite and the reflectance RO at different temperatures;
FIG. 3 is a graph showing the relationship between the amount of adsorbed inerts V2 alone and the reflectance RO at different temperatures;
FIG. 4 is a graph showing the relationship between the amount of adsorption V3 alone and the reflectance RO of the chitin group at different temperatures.
Detailed Description
The invention is described in further detail below with reference to the figures and the examples, but without limiting the invention.
Referring to fig. 1, according to an embodiment of the present invention, there is provided a method for measuring an adsorption amount of coal rock in a predetermined area, and the step S1: acquiring coal rocks at a plurality of positions of a predetermined area;
step S2: obtaining the micro-components of the coal rocks and the proportion of the micro-components of the coal rocks;
step S3: obtaining the individual adsorption quantity of each component of the coal rock according to the relation curve graph of the individual adsorption quantity of each component and the temperature environment of the coal rock;
step S4: calculating the total adsorption quantity of the position corresponding to each coal rock according to the ratio and the single adsorption quantity;
step S5: and obtaining an adsorption quantity distribution map of a predetermined area according to the total adsorption quantity of each coal rock.
By the measuring method, the adsorption of the coal rock can be predicted based on the microscopic combination. The measuring method only needs to prospecting and mining a plurality of coal rocks in a preset area, namely, the microscopic components can be analyzed and adsorbed and measured by the measuring method, so that the reservoir performance of the coal rocks can be evaluated more accurately.
Specifically, step S1 may obtain coal rocks at different depths in the predetermined area. Of course, more coal rocks can be obtained in a predetermined area to obtain more accurate data.
Step S2 may be performed by using an observation device such as a microscope to determine the micro-components of each coal rock and the ratio of each micro-component of the coal rock.
For example, the composition of the microscopic component may include: vitrinite group, inertinite group, and chitin group. The coal rock micro-component refers to an organic component of coal which can be identified under a microscope, and can be divided into a vitrinite component, a chitin component and an inert component (aiming at hard coal) according to differences of light transmittance, light transmittance color, reflectivity, reflection color, structure, protrusion, fluorescence, anisotropy, hardness, density and the like. Based on the difference of the properties of the coal rock micro-components, the coal rock micro-component determination method is not described herein again.
Based on the types of the microscopic components, the ratio of the vitrinite to the inertinite to the vitrinite to the mesoinite to the meso.
In step S3, the method for obtaining the individual adsorption amounts of the different components can be obtained by using the national Standard for high pressure isothermal adsorption test method of GB/T195602008 coal. The specific method of this step is not repeated here.
In step S3, the graph relating the individual adsorption amounts of the components may be obtained by performing adsorption measurements on the components at different preset temperatures;
obtaining the individual adsorption amounts at different temperatures to generate a graph of the relationship of the components.
Thus, the individual adsorption amounts of different microscopic components at different preset temperatures can be obtained, and thus, comparative data of different groups can be obtained, the individual adsorption amounts at different preset temperatures form different values, and the variation curves can refer to fig. 2 to 4, fig. 2 shows a relation curve of the individual adsorption amount V1 of the vitrinite group at different temperatures and the reflectance RO, fig. 3 shows a relation curve of the individual adsorption amount V2 of the inertinite group at different temperatures and the reflectance RO, fig. 4 shows a relation curve of the individual adsorption amount V3 of the chitin group at different temperatures and the reflectance RO, and the temperatures T in fig. 2 to 4 are 20 ℃, 30 ℃ and 40 ℃ as examples. Therefore, experimental data can be optimized, and the total adsorption capacity of the coal rocks with different temperature values can be obtained. In order to unify the temperature values, namely the adsorption capacity data under the isothermal condition, the total adsorption capacity of the coal rock can be calculated according to the independent adsorption capacities of different components at the same temperature.
Of course, the temperature environment of the coal rock can be determined based on the position of the coal rock, so that the individual adsorption amount of each component can be calculated according to a relation curve, and the total adsorption amount of the position corresponding to each coal rock can be calculated more accurately.
In step S4, the step of calculating the total adsorption amount of the coal rock from the occupation ratio and the individual adsorption amount includes the steps of:
step 11: multiplying the individual adsorption quantity of each component by the ratio to obtain an intermediate value;
step 12: and summing all the intermediate values to obtain the total adsorption quantity of the coal rocks. Step 11 and step 12 can be optimized by a formula, and step 11 and step 12 can also be evolved into a formula to calculate the total adsorption amount.
The single adsorption amount of the vitrinite group is V1, the single adsorption amount of the inertinite group is V2, and the single adsorption amount of the chitin group is V3;
the total adsorption quantity of the coal rock is V0, and the formula for calculating the total adsorption quantity of the coal rock is as follows:
v0 ═ (a1 × V1) + (a2 × V2) + (A3 × V3). The units of the ratio are%, i.e., percentages. The units of V0, V1, V2 and V3 are m3T (cubic meter per ton) and converted units thereof.
Step S5 is to obtain the total adsorption amount of each coal rock, and then obtain an adsorption amount distribution map of a predetermined area according to each position corresponding to each total adsorption amount.
For example, after obtaining a plurality of values, a trend of the total adsorption amount of the predetermined area in the vertical direction (for example, from top to bottom, increasing first and then gradually decreasing) may be obtained, and a trend of the total adsorption amount of the predetermined area in the horizontal direction (for example, a certain area is more and a certain area is less) may also be obtained, so that the reservoir performance of the coal rock may be evaluated more accurately.
Preferably, between the step S4 and the step S5, the following steps are further included:
step S6: circularly performing the step S3 at different temperatures to obtain the total adsorption quantity of the coal rock at different temperatures;
step S7: and obtaining the adsorption capacity of the coal rocks at different depths of the predetermined area according to the total adsorption capacity of the coal rocks at different temperatures.
The application also discloses a measuring device, which comprises a memory and a processor, wherein the memory is stored with a computer program, and the computer program realizes the measuring method when being executed by the processor.
In this embodiment, the memory may include a physical device for storing information, and typically, the information is digitized and then stored in a medium using an electrical, magnetic, or optical method. The memory according to this embodiment may further include: devices that store information using electrical energy, such as RAM, ROM, etc.; devices that store information using magnetic energy, such as hard disks, floppy disks, tapes, core memories, bubble memories, usb disks; devices for storing information optically, such as CDs or DVDs. Of course, there are other ways of memory, such as quantum memory, graphene memory, and so forth.
In this embodiment, the processor may be implemented in any suitable manner. For example, the processor may take the form of, for example, a microprocessor or processor and a computer-readable medium that stores computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, an embedded microcontroller, and so forth.
The specific functions of the measuring device, the processor and the memory thereof provided in the embodiments of the present specification can be explained in comparison with the foregoing embodiments in the present specification.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and refinements can be made without departing from the basic principle of the invention, and these modifications and refinements are also considered to be within the protective scope of the invention.
Claims (9)
1. A method for measuring the adsorption capacity of coal rocks in a predetermined area is characterized by comprising the following steps:
step S1: acquiring coal rocks at a plurality of positions of a predetermined area;
step S2: obtaining the micro-components of the coal rocks and the proportion of the micro-components of the coal rocks;
step S3: obtaining the independent adsorption quantity of each microscopic component of the coal rock according to a relation curve graph of the independent adsorption quantity and the reflectivity of each microscopic component and the temperature environment of the coal rock;
step S4: calculating the total adsorption quantity of the position corresponding to each coal rock according to the ratio and the single adsorption quantity;
step S5: and obtaining an adsorption quantity distribution map of a predetermined area according to the total adsorption quantity of each coal rock.
2. The method for measuring the amount of coal petrography adsorption of predetermined area according to claim 1, wherein the step S4 includes the following steps:
multiplying the independent adsorption quantity of each microscopic component by the ratio to obtain an intermediate value;
and summing all the intermediate values to obtain the total adsorption capacity of the coal rock.
3. The method for measuring the amount of coal petrography adsorption of the predetermined area according to claim 1, wherein the different components of the micro-components comprise: vitrinite group, inertinite group, and chitin group.
4. The method for measuring the amount of coal petrography adsorption of a predetermined area according to claim 3,
the ratio of the vitrinite group is A1, the ratio of the inertinite group is A2, and the ratio of the chitin group is A3;
the single adsorption amount of the vitrinite is V1, the single adsorption amount of the inertinite is V2, and the single adsorption amount of the chitin is V3;
the total adsorption quantity of the coal rock is V0, and the formula for calculating the total adsorption quantity of the coal rock is as follows:
V0＝(A1×V1)+(A2×V2)+(A3×V3)。
5. the method for measuring the amount of coal petrography adsorption of predetermined area according to claim 1, wherein step S3 includes the following steps:
carrying out adsorption measurement on a microscopic component at different preset temperatures;
obtaining the individual adsorption amounts at different temperatures to generate a relational graph of the microscopic components.
6. The method for measuring the amount of coal petrography adsorption of predetermined area according to claim 1, further comprising the following steps between the step S4 and the step S5:
step S6: circularly performing the step S3 at different temperatures to obtain the total adsorption quantity of the coal rock at different temperatures;
step S7: and obtaining the adsorption capacity of the coal rocks at different depths of the predetermined area according to the total adsorption capacity of the coal rocks at different temperatures.
7. The method for measuring the amount of coal petrography adsorption of predetermined area of claim 1, wherein step S1 includes obtaining coal petrography of different depth of predetermined area.
8. The method for measuring the adsorption capacity of the coal rock in the predetermined area according to claim 1, wherein the method for obtaining the individual adsorption capacity of each micro-component in the relation graph of the individual adsorption capacity and the reflectivity of each micro-component in the step S3 is obtained by using national standard of high-pressure isothermal adsorption test method of GB/T195602008 coal.
9. A measuring device for measuring the amount of coal petrography adsorbed in a predetermined area, characterized in that the measuring device comprises a memory and a processor, the memory having stored therein a computer program which, when executed by the processor, implements the measuring method according to any one of claims 1 to 8.
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