CN119469302A - Ultrasonic supercritical carbon dioxide flowmeter and flow measurement method thereof - Google Patents
Ultrasonic supercritical carbon dioxide flowmeter and flow measurement method thereof Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 280
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 140
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 140
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000011161 development Methods 0.000 abstract description 7
- 238000002347 injection Methods 0.000 description 8
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- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
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Abstract
本发明涉及一种超声波式超临界二氧化碳流量计及其流量测量方法，流量计包括：流量计主体，所述流量计主体上设置有用于流通超临界二氧化碳的流道，所述流道在第一点位处设置有第一声道、第二点位处设置有第二声道，所述第一声道和所述第二声道与所述流道贯通连接，且位于所述流道中心轴线的同侧；第一超声波组件，设置在所述第一声道内；第二超声波组件，设置在所述第二声道内。该流量计能实时测量井下具体层位处的超临界二氧化碳流量，为油田开发工程提供准确的参考数据。
The present invention relates to an ultrasonic supercritical carbon dioxide flowmeter and a flow measurement method thereof, wherein the flowmeter comprises: a flowmeter body, wherein a flow channel for circulating supercritical carbon dioxide is arranged on the flowmeter body, wherein the flow channel is provided with a first sound channel at a first point position and a second sound channel at a second point position, wherein the first sound channel and the second sound channel are connected to the flow channel through and are located on the same side of the central axis of the flow channel; a first ultrasonic component is arranged in the first sound channel; and a second ultrasonic component is arranged in the second sound channel. The flowmeter can measure the supercritical carbon dioxide flow rate at a specific layer in the well in real time, and provide accurate reference data for oilfield development engineering.
Description
Technical Field
The invention relates to an ultrasonic supercritical carbon dioxide flowmeter and a flow measurement method thereof, belonging to the technical field of medium flow measurement.
Background
Supercritical carbon dioxide is increasingly used in fields such as petroleum, chemical industry and the like. The composite material has the advantages of low cost, carbon emission elimination, comprehensive utilization and recovery, super-strong permeability and various chemical properties, and has extremely wide and good economic benefits for new applications such as oil extraction, drilling, chemical engineering and the like.
The oil displacement and yield increase by injecting supercritical carbon dioxide into the well has become an important successor technology for the development of domestic and foreign oil fields, can not only improve the recovery ratio of the oil field, but also be beneficial to carbon dioxide emission reduction and environmental protection. Currently, multi-oil layer injection technology is adopted for downhole supercritical carbon dioxide injection. Geologist place demands for stratified gas injection due to reservoir heterogeneity. For the dispensing of multiple thin reservoirs, the amount of dispensed each layer may be small. The carbon dioxide is in a supercritical state in the underground, the viscosity of the carbon dioxide is close to that of gas, and the small flow rate and the low viscosity bring difficulty to the underground layering test, so that the carbon dioxide injection quantity of a single specific underground layer can not be measured.
Disclosure of Invention
Aiming at the technical problems, the invention provides an ultrasonic supercritical carbon dioxide flowmeter and a flow measuring method thereof, which can measure supercritical carbon dioxide flow at a specific underground layer in real time and provide accurate reference data for oilfield development engineering.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an ultrasonic supercritical carbon dioxide flow meter comprising:
The flow meter comprises a flow meter main body, wherein a flow channel for circulating supercritical carbon dioxide is arranged on the flow meter main body, a first sound channel is arranged at a first point position of the flow channel, a second sound channel is arranged at a second point position of the flow channel, and the first sound channel and the second sound channel are in through connection with the flow channel and are positioned on the same side of the central axis of the flow channel;
A first ultrasonic assembly disposed within the first acoustic channel;
And the second ultrasonic assembly is arranged in the second channel.
In the ultrasonic supercritical carbon dioxide flowmeter, preferably, the first ultrasonic assembly and the second ultrasonic assembly have the same structure, and the first ultrasonic assembly comprises the following components:
the piezoelectric ceramic device comprises a piezoelectric ceramic sleeve, an ultrasonic piezoelectric ceramic piece and a piezoelectric ceramic cap, wherein the piezoelectric ceramic sleeve is arranged in a first sound channel and is provided with an installation cavity, the ultrasonic piezoelectric ceramic piece is assembled on the bottom wall of the installation cavity, the piezoelectric ceramic cap is assembled at an accent of the installation cavity, and a through hole for penetrating a lead wire is formed in the piezoelectric ceramic cap.
In the ultrasonic supercritical carbon dioxide flowmeter, preferably, the piezoelectric ceramic sleeve is sealed with the first sound channel metal, and a sealing element is arranged between the piezoelectric ceramic sleeve and the first sound channel metal, and/or,
The piezoelectric ceramic cap is in threaded fastening connection with the mounting cavity.
In the ultrasonic supercritical carbon dioxide flowmeter, preferably, a gap exists between the piezoelectric ceramic cap and the ultrasonic piezoelectric ceramic piece, and the gap is filled with a fixing adhesive, and/or,
The through holes are also filled with fixing glue or the through holes are not filled with fixing glue.
Preferably, the first ultrasonic assembly and the first sound channel are coaxially arranged, the second ultrasonic assembly and the second sound channel are coaxially arranged, and the axis of the first ultrasonic assembly and the axis of the second ultrasonic assembly are in V-shaped crossed arrangement.
The ultrasonic supercritical carbon dioxide flowmeter preferably further comprises a detection assembly, wherein the detection assembly is arranged at the upstream of the first sound channel and the second sound channel, and the detection assembly comprises a temperature detection piece and a pressure detection piece.
The second aspect of the invention provides an ultrasonic supercritical carbon dioxide flow measuring method, comprising the following steps:
S1, obtaining physical parameters of supercritical carbon dioxide;
S2, acquiring ultrasonic sound velocity between a first point location and a second point location on a supercritical carbon dioxide flow path;
s3, acquiring the actual medium flow velocity of the supercritical carbon dioxide according to the difference value of the ultrasonic sound velocity between the first point location and the second point location and the static sound velocity of the medium;
and S4, obtaining the mass flow of the flow channel where the supercritical carbon dioxide is located according to the cross-sectional area of the flow channel where the supercritical carbon dioxide is located, the density of the medium and the actual flow velocity of the medium.
In the ultrasonic supercritical carbon dioxide flow measurement method, preferably, the step S1 specifically includes the following steps:
acquiring the real-time temperature and the real-time pressure of supercritical carbon dioxide;
and obtaining the medium density and the medium static sound velocity of the supercritical carbon dioxide according to the real-time temperature, the real-time pressure and the corresponding relation between the physical property parameters of the supercritical carbon dioxide and the real-time temperature and the real-time pressure.
In the ultrasonic supercritical carbon dioxide flow measurement method, preferably, the step S2 specifically includes the following steps:
Acquiring the propagation time of ultrasonic waves between a first point location and a second point location;
And acquiring ultrasonic sound velocity between the first point position and the second point position on the supercritical carbon dioxide flow path according to the propagation time and the distance between the first point position and the second point position.
In the ultrasonic supercritical carbon dioxide flow measuring method, preferably, when the propagation time of the ultrasonic wave between the first point position and the second point position is acquired, the first point position is controlled to emit the ultrasonic wave, the second point position is controlled to receive the ultrasonic wave emitted by the first point position, and/or,
And controlling the second point to emit ultrasonic waves, and controlling the first point to receive the ultrasonic waves emitted by the second point.
A third aspect of the present invention provides an ultrasonic supercritical carbon dioxide flow rate measurement apparatus, comprising:
the first processing unit is used for obtaining physical property parameters of the supercritical carbon dioxide;
the second processing unit is used for acquiring ultrasonic sound velocity between the first point position and the second point position on the supercritical carbon dioxide flow path;
the third processing unit is used for obtaining the actual medium flow velocity of the supercritical carbon dioxide according to the difference value of the ultrasonic sound velocity between the first point location and the second point location and the static sound velocity of the medium;
And the fourth processing unit is used for obtaining the mass flow of the runner where the supercritical carbon dioxide is located according to the cross-sectional area of the runner where the supercritical carbon dioxide is located, the density of the medium and the actual flow velocity of the medium.
A fourth aspect of the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the ultrasonic supercritical carbon dioxide flow measurement method of any one of the above.
In a fifth aspect, the present invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any one of the above-mentioned ultrasonic supercritical carbon dioxide flow measurement methods when the computer program is executed.
Due to the adoption of the technical scheme, the invention has the following advantages:
According to the ultrasonic supercritical carbon dioxide flow measuring method and the ultrasonic supercritical carbon dioxide flow measuring flowmeter provided by the invention, if the medium flows along the propagation direction of the ultrasonic wave, the ultrasonic sound velocity between two points on the medium flow path is the superimposed value of the static sound velocity of the medium and the actual flow velocity of the medium, and the actual flow velocity of the medium can be obtained on the premise that the ultrasonic sound velocity between the two points and the static sound velocity of the medium are known. Based on this principle, after acquiring the medium static sound velocity of the supercritical carbon dioxide and the ultrasonic sound velocity between the first point and the second point on the supercritical carbon dioxide flow path, the medium actual flow velocity of the supercritical carbon dioxide can be acquired. And obtaining the mass flow of the flow channel where the supercritical carbon dioxide is located according to the cross-sectional area of the flow channel where the supercritical carbon dioxide is located, the medium density and the obtained actual flow velocity of the medium. By the supercritical carbon dioxide flow measuring method, the supercritical carbon dioxide mass flow at a specific underground layer can be measured in real time, and accurate reference data can be provided for oilfield development engineering.
Drawings
FIG. 1 is a flow chart of an ultrasonic supercritical carbon dioxide flow measurement method according to an embodiment of the present invention;
FIG. 2 is a side view of an ultrasonic supercritical carbon dioxide flow meter according to the embodiment of the present invention;
FIG. 3 is a view in the A-A direction of FIG. 2;
FIG. 4 is a partial enlarged view at B in FIG. 3;
FIG. 5 is a schematic illustration of the communication connections between the components of the flowmeter of the present invention;
The reference numerals are as follows:
1-flowmeter body, 2-first ultrasonic assembly, 3-second ultrasonic assembly, 4-temperature detecting element, 5-pressure detecting element;
11-flow channel, 12-first channel, 13-second channel;
21-piezoelectric ceramic sleeve, 22-ultrasonic piezoelectric ceramic piece, 23-piezoelectric ceramic cap, 24-sealing piece and 25-gap;
211-mounting cavity, 231-perforations.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," "third," "fourth," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
Currently, multi-oil layer injection technology is adopted for downhole supercritical carbon dioxide injection. Geologist place demands for stratified gas injection due to reservoir heterogeneity. For the dispensing of multiple thin reservoirs, the amount of dispensed each layer may be small. The carbon dioxide is in a supercritical state in the underground, the viscosity of the carbon dioxide is close to that of gas, and the small flow rate and the low viscosity bring difficulty to the underground layering test, so that the carbon dioxide injection quantity of a single specific underground layer can not be measured.
Based on the technical problems, the invention provides an ultrasonic supercritical carbon dioxide flowmeter and a flow measuring method thereof, and the method can measure supercritical carbon dioxide flow at a specific underground layer in real time and provide accurate reference data for oilfield development engineering.
As shown in fig. 2 and 3, the ultrasonic supercritical carbon dioxide flowmeter provided by the invention comprises a flowmeter main body 1, a first ultrasonic assembly 2 and a second ultrasonic assembly 3.
The flow meter body 1 defines a flow channel 11 for circulating supercritical carbon dioxide, the flow channel 11 is provided with a first sound channel 12 at a first point position and a second sound channel 13 at a second point position, the first ultrasonic assembly 2 is arranged in the first sound channel 12, the second ultrasonic assembly 3 is arranged in the second sound channel 13, and the first ultrasonic assembly 2 and the second ultrasonic assembly 3 respectively comprise a transmitting end for transmitting ultrasonic waves and a receiving end for receiving the ultrasonic waves. Supercritical carbon dioxide flows in the flow passage 11 in the direction indicated by the straight arrow in fig. 3. In the calculation formula of the mass flow, the cross-sectional area of the flow channel is the cross-sectional area of the flow channel 11 in fig. 3.
The receiving end of the second ultrasonic assembly 3 can receive ultrasonic waves when the transmitting end of the first ultrasonic assembly 2 transmits ultrasonic waves, and the receiving end of the first ultrasonic assembly 2 can receive ultrasonic waves when the transmitting end of the second ultrasonic assembly 3 transmits ultrasonic waves. Specifically, the transmitting end comprises an ultrasonic transmitting probe, and the receiving end comprises an ultrasonic receiving probe. By the supercritical carbon dioxide flow measuring method, the supercritical carbon dioxide mass flow at a specific underground layer can be measured in real time, and accurate reference data can be provided for oilfield development engineering.
As shown in fig. 4, the first ultrasonic assembly 2 (the second ultrasonic assembly 3 has the same structure as the first ultrasonic assembly 2) includes a piezoelectric ceramic sleeve 21, an ultrasonic piezoelectric ceramic member 22, and a piezoelectric ceramic cap 23. The piezoelectric ceramic sleeve 21 is arranged on the first sound channel 12, the piezoelectric ceramic sleeve 21 is provided with a mounting cavity 211, the ultrasonic piezoelectric ceramic piece 22 is arranged on the bottom wall of the mounting cavity 211, the ultrasonic piezoelectric ceramic piece 22 is connected with a lead wire, the piezoelectric ceramic cap 23 is arranged at the cavity opening of the mounting cavity 211, and the piezoelectric ceramic cap 23 is provided with a through hole 231 for penetrating the lead wire.
The piezoelectric ceramic sleeve 21 provides a mounting base for the ultrasonic piezoelectric ceramic piece 22, and in particular, the ultrasonic piezoelectric ceramic piece 22 may be adhered to the inner wall of the piezoelectric ceramic sleeve 21. The piezoelectric ceramic cap 23 can block the cavity opening of the mounting cavity 211 while playing a role of leading out a lead, and further strengthen the fixation of the ultrasonic piezoelectric ceramic piece 22.
The piezoelectric ceramic sleeve 21 and the flowmeter body 1 are mainly sealed by metal, and rubber sealing is auxiliary. Specifically, the piezoelectric ceramic sleeve 21 is in threaded connection with the first sound channel 12, and a sealing piece 24 is arranged between the piezoelectric ceramic sleeve 21 and the inner wall of the first sound channel 12, and the sealing piece 24 is a rubber ring. Further, the piezoelectric ceramic sleeve 21 is nickel-based alloy steel, has high strength and acid corrosion resistance, and bears high pressure of 60 MPa.
More specifically, the piezoceramic cap 23 is screwed on the cavity opening of the mounting cavity 211, so that the connection is stable and the sealing performance is good.
In a preferred embodiment of the present invention, as shown in fig. 4, a gap 25 exists between the piezoelectric ceramic cap 23 and the ultrasonic piezoelectric ceramic piece 22, and the gap 25 is filled with a fixing adhesive. After the ultrasonic piezoelectric ceramic piece 22 is adhered in the piezoelectric ceramic sleeve 21, solid glue is filled above the ultrasonic piezoelectric ceramic piece 22, and the piezoelectric ceramic cap 23 is screwed in the piezoelectric ceramic sleeve 21, so that the fixing effect of the ultrasonic piezoelectric ceramic piece 22 is enhanced.
Further, a fixing glue may be provided in the through hole 231 of the piezoelectric ceramic cap 23 to fix the lead in the hole, and the fixing glue may not be provided in the through hole 231.
In this embodiment, as shown in fig. 3, the first ultrasonic assembly 2 is coaxially arranged with the first acoustic channel 12, the second ultrasonic assembly 3 is coaxially arranged with the second acoustic channel 13, and the axis of the first ultrasonic assembly 2 and the axis of the second ultrasonic assembly 3 are in V-shaped cross arrangement, so that the size is reduced, and the installation of a limited underground space is facilitated. The dashed lines in fig. 3 are the axis of the first ultrasonic assembly 2 and the axis of the second ultrasonic assembly 3, respectively.
As shown in fig. 5, the flowmeter further includes a temperature detecting element 4 and a pressure detecting element 5, where the temperature detecting element 4 and the pressure detecting element 5 are both disposed upstream of the first acoustic channel 12 and the second acoustic channel 13, the temperature detecting element 4 is configured to monitor the temperature of the supercritical carbon dioxide in real time, and the pressure detecting element 5 is configured to monitor the pressure of the supercritical carbon dioxide in real time, so as to obtain the real-time temperature and the implementation pressure of the supercritical carbon dioxide, and according to the real-time temperature and the implementation pressure, the medium density and the medium static sound velocity of the supercritical carbon dioxide under the real-time temperature and the implementation pressure can be queried. The temperature sensing element 4 and the pressure sensing element 5 are installed downhole, respectively, and upstream of the flow meter. The real-time pressure and the real-time temperature of the supercritical carbon dioxide flowing through the upstream of the flowmeter can be measured in real time. The temperature detecting member 4 includes a temperature sensor, and the pressure detecting member 5 includes a pressure sensor.
Further, the temperature detecting element 4 and the pressure detecting element 5 are both in communication connection with an amplifier and an analog-to-digital converter to amplify and convert signals, and the amplifier and the analog-to-digital converter are in communication connection with a processor to enable the processor to acquire signals of real-time pressure and real-time temperature. The ultrasonic piezoelectric ceramic piece 22 is in communication with the processor through a frequency signal transmitting and receiving circuit, so that the processor obtains the signal of the ultrasonic piezoelectric ceramic piece 22. The processor is used for realizing the ultrasonic supercritical carbon dioxide flow measuring method when executing the program, obtaining the supercritical carbon dioxide mass flow, and transmitting the data of the mass flow to an upper computer on the ground through the communication interface. The communication interface is exemplified by RS485.
The flowmeter meets the following requirements of high bearing pressure, up to 100Mpa, high flow rate of 200,000Nm 3/d, high temperature resistance grade up to 150 ℃, special material selection, CO 2 acid corrosion resistance, high-speed fluid erosion resistance, no obstruction to medium flow, and no corrosion of components measured by the flowmeter. The flowmeter can be used for measuring the flow of supercritical CO 2 fluid in the environment of high temperature 100MPa and 150 ℃ in the pit. The flowmeter is installed at different underground layers, and the supercritical carbon dioxide flow flowing through the flowmeter is measured in real time and transmitted to the ground. The underground circuit components are all high-resistant Wen Yuan, so that the 150 ℃ environment temperature can be ensured to work. The circuit board and the transmission line are shielded by the housing, ensuring normal operation at 1000 atmospheres. All signal wires are transmitted by adopting shielding wires, so that underground electromagnetic interference is shielded. The signal processing algorithm executed by the processor uses a digital filter, and adopts various filtering algorithms, such as an anti-pulse interference moving average filtering method, a 50Hz wave trap, an FIR function filtering method and the like, so as to filter noise signals and ensure measurement accuracy.
The second aspect of the invention provides an ultrasonic supercritical carbon dioxide flow measuring method, comprising the following steps:
S1, acquiring physical parameters of supercritical carbon dioxide, wherein the physical parameters comprise medium density and medium static sound velocity, and the medium static sound velocity is the propagation velocity of ultrasonic waves in the static supercritical carbon dioxide.
S2, acquiring ultrasonic sound velocity between a first point and a second point on the supercritical carbon dioxide flow path.
And S3, acquiring the actual flow velocity of the medium of the supercritical carbon dioxide according to the difference value of the ultrasonic sound velocity between the first point location and the second point location and the static sound velocity of the medium.
And S4, obtaining the mass flow of the flow channel where the supercritical carbon dioxide is located according to the cross-sectional area of the flow channel where the supercritical carbon dioxide is located, the density of the medium and the actual flow velocity of the medium.
Specifically, in step S3, the actual flow velocity of the medium of the supercritical carbon dioxide is the flow velocity of the supercritical carbon dioxide relative to the flow channel.
Specifically, in step S4, the calculation formula of the mass flow rate of the supercritical carbon dioxide is:
Mass flow = flow channel cross-sectional area x media density x media actual flow rate. According to the formula, the supercritical carbon dioxide mass flow at the specific underground layer can be obtained.
If the medium flows along the propagation direction of the ultrasonic wave, the ultrasonic sound velocity between two points on the medium flow path is the superposition value of the static sound velocity of the medium and the actual flow velocity of the medium, and the actual flow velocity of the medium can be obtained on the premise that the ultrasonic sound velocity between the two points and the static sound velocity of the medium are known. Based on this principle, after acquiring the medium static sound velocity of the supercritical carbon dioxide and the ultrasonic sound velocity between the first point and the second point on the supercritical carbon dioxide flow path, the medium actual flow velocity of the supercritical carbon dioxide can be acquired. And obtaining the mass flow of the flow channel where the supercritical carbon dioxide is located according to the cross-sectional area of the flow channel where the supercritical carbon dioxide is located, the medium density and the obtained actual flow velocity of the medium. By the supercritical carbon dioxide flow measuring method, the supercritical carbon dioxide mass flow at a specific underground layer can be measured in real time, and accurate reference data can be provided for oilfield development engineering.
Further, the obtaining physical parameters of the supercritical carbon dioxide in step S1 specifically includes:
s11, acquiring real-time temperature and real-time pressure of supercritical carbon dioxide;
and S12, obtaining the medium density and the medium static sound velocity of the supercritical carbon dioxide according to the real-time temperature, the real-time pressure and the corresponding relation between the physical property parameters of the supercritical carbon dioxide and the real-time temperature and the real-time pressure.
Physical parameters (medium density, medium viscosity, medium static sound velocity, etc.) of supercritical carbon dioxide are affected by pressure and temperature, so that the flow rate of supercritical carbon dioxide cannot be calculated simply according to the sound velocity by applying a conventional flow rate calculation formula. Specifically, in this embodiment, after acquiring the real-time temperature and the real-time pressure of the supercritical carbon dioxide, a database of NIST (national institute of standards and technology) is queried, in which the corresponding relationship between the physical parameters of the supercritical carbon dioxide and the real-time temperature and the real-time pressure is recorded, and the medium density and the medium static sound velocity of the supercritical carbon dioxide at the real-time temperature and the implementation pressure are queried according to the database.
Further, in step S2, acquiring an ultrasonic sound velocity between the first point location and the second point location on the supercritical carbon dioxide flow path includes:
s21, acquiring the propagation time of ultrasonic waves between a first point location and a second point location;
S22, acquiring ultrasonic sound velocity between the first point and the second point on the supercritical carbon dioxide flow path according to the propagation time and the distance between the first point and the second point.
On the premise that the distance between the first point location and the second point location and the propagation time of the ultrasonic wave between the first point location and the second point location are known, the distance is divided by the time to obtain the ultrasonic sound velocity between the first point location and the second point location on the supercritical carbon dioxide flow path, and then the actual flow velocity of the medium of the supercritical carbon dioxide is obtained according to the ultrasonic sound velocity and the static velocity of the medium obtained in the step S1.
Further, when the propagation time of the ultrasonic wave between the first point position and the second point position is obtained, the first point position is controlled to transmit the ultrasonic wave, the second point position is controlled to receive the ultrasonic wave transmitted by the first point position, the time difference between transmission and reception is the propagation time of the ultrasonic wave between the first point position and the second point position, and/or the second point position is controlled to transmit the ultrasonic wave, the first point position is controlled to receive the ultrasonic wave transmitted by the second point position, and the time difference between transmission and reception is the propagation time of the ultrasonic wave between the first point position and the second point position.
The flow direction of the supercritical carbon dioxide is from the first point to the second point, the ultrasonic wave emitted by the first point is controlled to be emitted by the first point, the ultrasonic wave emitted by the first point is controlled to be received by the second point is defined to be forward measured, the ultrasonic wave emitted by the second point is controlled to be emitted by the second point, the ultrasonic wave emitted by the second point is controlled to be received by the first point, and in practical application, the forward measurement and the reverse measurement can be combined to obtain the propagation time of the ultrasonic wave between the first point and the second point, the error can be reduced, and finally the error can be controlled within 1%.
A third aspect of the present invention provides an ultrasonic supercritical carbon dioxide flow rate measurement apparatus, comprising:
the first processing unit is used for obtaining physical property parameters of the supercritical carbon dioxide;
the second processing unit is used for acquiring ultrasonic sound velocity between the first point position and the second point position on the supercritical carbon dioxide flow path;
the third processing unit is used for obtaining the actual medium flow velocity of the supercritical carbon dioxide according to the difference value of the ultrasonic sound velocity between the first point location and the second point location and the static sound velocity of the medium;
And the fourth processing unit is used for obtaining the mass flow of the runner where the supercritical carbon dioxide is located according to the cross-sectional area of the runner where the supercritical carbon dioxide is located, the density of the medium and the actual flow velocity of the medium.
A fourth aspect of the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the ultrasonic supercritical carbon dioxide flow measurement method of any one of the above.
In a fifth aspect, the present invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any one of the above-mentioned ultrasonic supercritical carbon dioxide flow measurement methods when the computer program is executed.
The present invention is described in terms of flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (13)
1. An ultrasonic supercritical carbon dioxide flow meter, comprising:
A flow meter main body (1), wherein a flow channel (11) for circulating supercritical carbon dioxide is arranged on the flow meter main body (1), a first sound channel (12) is arranged at a first point position of the flow channel (11), a second sound channel (13) is arranged at a second point position of the flow channel, and the first sound channel (12) and the second sound channel (13) are in through connection with the flow channel (11) and are positioned on the same side of the central axis of the flow channel (11);
a first ultrasonic assembly (2) disposed within the first acoustic channel (12);
And a second ultrasonic assembly (3) disposed within the second channel (13).
2. The ultrasonic supercritical carbon dioxide flow meter according to claim 1, characterized in that the first ultrasonic assembly (2) and the second ultrasonic assembly (3) are identical in structure, the first ultrasonic assembly (2) comprising the following components:
Piezoelectric ceramic sleeve (21), ultrasonic wave piezoceramics spare (22) and piezoceramics cap (23), piezoelectric ceramics sleeve (21) set up in first sound channel (12), and have installation cavity (211), ultrasonic wave piezoceramics spare (22) assemble on the diapire of installation cavity (211), piezoceramics cap (23) assemble the accent in installation cavity (211), be provided with on piezoceramics cap (23) and be used for wearing to establish perforation (231) of lead wire.
3. An ultrasonic supercritical carbon dioxide flow meter according to claim 2, characterized in that the piezoelectric ceramic sleeve (21) is metal sealed with the first acoustic channel (12) with a seal (24) therebetween and/or,
The piezoelectric ceramic cap (23) is in threaded fastening connection with the mounting cavity (211).
4. The ultrasonic supercritical carbon dioxide flow meter according to claim 2, wherein a gap (25) is present between the piezoelectric ceramic cap (23) and the ultrasonic piezoelectric ceramic piece (22), the gap (25) is filled with a fixing glue, and/or,
The through holes (231) are also filled with fixing glue or the through holes (231) are not filled with fixing glue.
5. The ultrasonic supercritical carbon dioxide flow meter according to claim 1, wherein the first ultrasonic assembly (2) is coaxially arranged with the first acoustic channel (12), the second ultrasonic assembly (3) is coaxially arranged with the second acoustic channel (13), and the axis of the first ultrasonic assembly (2) and the axis of the second ultrasonic assembly (3) are arranged in a V-shaped cross.
6. The ultrasonic supercritical carbon dioxide flow meter according to any of claims 1-5, further comprising a detection assembly, the detection assembly being provided upstream of both the first channel (12) and the second channel (13), the detection assembly comprising a temperature detector (4) and a pressure detector (5).
7. An ultrasonic supercritical carbon dioxide flow measuring method is characterized by comprising the following steps:
S1, obtaining physical parameters of supercritical carbon dioxide;
S2, acquiring ultrasonic sound velocity between a first point location and a second point location on a supercritical carbon dioxide flow path;
s3, acquiring the actual medium flow velocity of the supercritical carbon dioxide according to the difference value of the ultrasonic sound velocity between the first point location and the second point location and the static sound velocity of the medium;
and S4, obtaining the mass flow of the flow channel where the supercritical carbon dioxide is located according to the cross-sectional area of the flow channel where the supercritical carbon dioxide is located, the density of the medium and the actual flow velocity of the medium.
8. The ultrasonic supercritical carbon dioxide flow rate measurement method according to claim 7, wherein the step S1 specifically comprises the steps of:
acquiring the real-time temperature and the real-time pressure of supercritical carbon dioxide;
and obtaining the medium density and the medium static sound velocity of the supercritical carbon dioxide according to the real-time temperature, the real-time pressure and the corresponding relation between the physical property parameters of the supercritical carbon dioxide and the real-time temperature and the real-time pressure.
9. The ultrasonic supercritical carbon dioxide flow rate measurement method according to claim 7, wherein the step S2 specifically comprises the steps of:
Acquiring the propagation time of ultrasonic waves between a first point location and a second point location;
And acquiring ultrasonic sound velocity between the first point position and the second point position on the supercritical carbon dioxide flow path according to the propagation time and the distance between the first point position and the second point position.
10. The method of measuring the flow rate of supercritical carbon dioxide by ultrasonic waves according to claim 9, wherein the first point is controlled to emit ultrasonic waves and the second point is controlled to receive ultrasonic waves emitted from the first point when the propagation time of ultrasonic waves between the first point and the second point is obtained,
And controlling the second point to emit ultrasonic waves, and controlling the first point to receive the ultrasonic waves emitted by the second point.
11. An ultrasonic supercritical carbon dioxide flow measuring device, comprising:
the first processing unit is used for obtaining physical property parameters of the supercritical carbon dioxide;
the second processing unit is used for acquiring ultrasonic sound velocity between the first point position and the second point position on the supercritical carbon dioxide flow path;
the third processing unit is used for obtaining the actual medium flow velocity of the supercritical carbon dioxide according to the difference value of the ultrasonic sound velocity between the first point location and the second point location and the static sound velocity of the medium;
And the fourth processing unit is used for obtaining the mass flow of the runner where the supercritical carbon dioxide is located according to the cross-sectional area of the runner where the supercritical carbon dioxide is located, the density of the medium and the actual flow velocity of the medium.
12. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, realizes the steps of the ultrasonic supercritical carbon dioxide flow measurement method according to any one of claims 7-10.
13. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the ultrasonic supercritical carbon dioxide flow measurement method according to any one of claims 7-10 when the computer program is executed by the processor.
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| CN202411692056.8A CN119469302A (en) | 2024-11-25 | 2024-11-25 | Ultrasonic supercritical carbon dioxide flowmeter and flow measurement method thereof |
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| CN202411692056.8A CN119469302A (en) | 2024-11-25 | 2024-11-25 | Ultrasonic supercritical carbon dioxide flowmeter and flow measurement method thereof |
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| CN202411692056.8A Pending CN119469302A (en) | 2024-11-25 | 2024-11-25 | Ultrasonic supercritical carbon dioxide flowmeter and flow measurement method thereof |
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