CN209088048U - Antenna for nuclear magnetic resonance analysis of fluid instrument - Google Patents
Antenna for nuclear magnetic resonance analysis of fluid instrument Download PDFInfo
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- CN209088048U CN209088048U CN201821799170.0U CN201821799170U CN209088048U CN 209088048 U CN209088048 U CN 209088048U CN 201821799170 U CN201821799170 U CN 201821799170U CN 209088048 U CN209088048 U CN 209088048U
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Abstract
The utility model provides a kind of antenna for nuclear magnetic resonance analysis of fluid instrument, including coil brace, the first solenoid coil and the second solenoid coil, wherein, coil brace is the cylinder of an end closure, it is coaxially set in outside the sample cell of nuclear magnetic resonance analysis of fluid instrument, the center hole without magnetic sealing plate of unsealed one end connection nuclear magnetic resonance analysis of fluid instrument；First solenoid coil is sheathed on one end far from no magnetic sealing plate on coil brace；Second solenoid coil is sheathed on coil brace close to one end of no magnetic sealing plate.The on-line measurement of the flow velocity of component analysis parameter and streaming flow to stationary fluid may be implemented in the utility model.
Description
Technical field
The utility model relates to the engineer application field of fluid components content measurement more particularly to oil-gas components to survey online
Amount.
Background technique
As what the increasingly depleted and unconventional petroleum resources of conventional gas and oil resource were developed gos deep into, petroleum engineering field
The underground fluid faced is mostly based on oil, water two-phase mixtures fluid.For many years, it recovers the oil in production, water-oil phase measures especially
Be on-line metering it is always a global problem, makes slow progress.Live common water content metering method is will to sample standing
After a period of time, every content is read again after grease layering.This method has many deficiencies: first is that accuracy is not high, artificial shadow
The factor of sound is big；Second is that inefficiency；Third is that additional human cost；Fourth is that sample directly inclines in most cases after completing measurement
, environment is polluted, and for containing gas well, this method has certain security risk.With oil-gas reservoir fine-grained management and peace
The promotion of loopful guaranteed request, traditional measurement means have been unable to satisfy requirement, the survey of urgent need efficiently, accurate, green, safe
Amount means.
Low-field nuclear magnetic resonance method is a kind of fluid inside component analysis method of mainstream, it is advantageous that non-intruding, green
Colour circle guarantor, efficiently and accurately, have good application prospect in terms of the oil gas on-line measurement of Oil Field.But magnetic nuclear resonance method
Application difficulty in on-line measurement field is quite big, is primarily due to conventional indoor Nuclear Magnetic Resonance Measurement instrumentation and testing method not
Meet the requirement of the flow velocity on-line measurement of on-line measurement, especially streaming flow.
Currently, the nuclear magnetic resonance analysis of fluid instrument using low-field nuclear magnetic resonance method mainly uses dynamical surveying mode, i.e.,
The measurement of NMR signal is carried out in the state that sample and probe keep opposing stationary；In addition, for stream of different nature
Body, there are one-dimensional component analysis scheme or two-dimentional component analysis schemes, wherein one-dimensional component analysis scheme is used for grease magnetic resonance
The larger situation of nature difference needs to obtain the component analysis parameter of fluid: T1Relaxation time or T2Relaxation time；Two-dimentional component
The analytical plan situation close for grease magnetic resonance properties, needs to obtain the component analysis parameter of fluid: T2Relaxation time and
Diffusion coefficient D.
Antenna structure is an important component of probe designs in nuclear magnetic resonance analysis of fluid instrument, can be by emitting arteries and veins
Sequence and receives echo-signal string are rushed, to measure the component analysis parameter of fluid and the flow velocity of streaming flow.Therefore, how to utilize
Antenna in nuclear magnetic resonance analysis of fluid instrument surveys the component analysis parameter of stationary fluid and the flow velocity of streaming flow online
Amount just becomes a urgent problem needed to be solved.
Contain currently, nuclear magnetic resonance multi-phase flowmeter can be used for the grease component that grease magnetic resonance properties differ in larger situation
Amount analysis, but the flowmeter is not capable of measuring the T of fluid1Relaxation time, T2The component analyses such as relaxation time and diffusion coefficient D parameter,
Therefore it cannot be used for the amount grease component analysis in the close situation of grease magnetic resonance properties；In addition, the flowmeter does not also consider to flow
The on-line measurement of the flow velocity of dynamic fluid.
Utility model content
The utility model embodiment proposes a kind of antenna and test method for nuclear magnetic resonance analysis of fluid instrument, to
Realize the on-line measurement to the component analysis parameter of stationary fluid and the flow velocity of streaming flow.What the utility model embodiment proposed
Antenna for nuclear magnetic resonance analysis of fluid instrument, comprising:
Coil brace 1, the first solenoid coil 2 and the second solenoid coil 3, wherein
Coil brace 1 is the cylinder of an end closure, is coaxially set in outside the sample cell 4 of nuclear magnetic resonance analysis of fluid instrument
Portion, the center hole without magnetic sealing plate 5 of unsealed one end connection nuclear magnetic resonance analysis of fluid instrument；
First solenoid coil 2 is sheathed on one end far from no magnetic sealing plate 5 on coil brace 1；
Second solenoid coil 3 is sheathed on coil brace 1 close to one end of no magnetic sealing plate 5.
In the utility model embodiment, coil brace 1 is the cylindricality of an end closure, is coaxially set in nmr flow body
Outside the sample cell 4 of analyzer, the center hole without magnetic sealing plate 5 of unsealed one end connection nuclear magnetic resonance analysis of fluid instrument,
Sample cell is conveniently replaceable without extracting entire sample cell out；First solenoid coil 2 is sheathed on coil brace 1 far from no magnetic
One end of sealing plate 5；Second solenoid coil 3 is sheathed on coil brace 1 close to one end of no magnetic sealing plate 5.The utility model is real
The first solenoid coil 2 in example is applied, is placed in 8 range of homogeneous static magnetic field, passes through the tuning electricity in no magnetic sealing plate 5 in spectrometer 6
Emit pulse train under the control on road, while 2 receives echo-signal string of the first solenoid coil is, it can be achieved that group to stationary fluid
Analysis parameter: T1Relaxation time or T2The on-line measurement in relaxation time；Second solenoid coil 3 is placed in 9 model of gradient magnetostatic field
In enclosing, pulse train, while the second solenoid coil 3 are emitted in the case where spectrometer 6 is by the control of the tuning circuit in no magnetic sealing plate 5
Receives echo-signal string is, it can be achieved that component analysis parameter to stationary fluid: T2The online survey in relaxation time and diffusion coefficient D
Amount, while realizing the on-line measurement to the flow velocity of streaming flow.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is the structural schematic diagram in the utility model embodiment for the antenna of nuclear magnetic resonance analysis of fluid instrument；
Fig. 2 is that the antenna of nuclear magnetic resonance analysis of fluid instrument is used in the utility model embodiment in fluid sample parameter measurement
Schematic diagram；
Fig. 3 is for the antenna of nuclear magnetic resonance analysis of fluid instrument in the utility model embodiment in measurement fluid sample composition
When flow chart.
Specific embodiment
It is right with reference to the accompanying drawing for the objectives, technical solutions, and advantages of the embodiments of the present invention are more clearly understood
The utility model embodiment is described in further details.Here, the illustrative embodiments and their description of the utility model are for solving
The utility model is released, but is not intended to limit the scope of the present invention.
Fig. 1 is the schematic construction of the antenna provided by the embodiment of the utility model for nuclear magnetic resonance analysis of fluid instrument, such as
Shown in Fig. 1, the antenna provided by the embodiment of the utility model for nuclear magnetic resonance analysis of fluid instrument includes:
Coil brace 1, the first solenoid coil 2 and the second solenoid coil 3, wherein
Coil brace 1 is the cylinder of an end closure, is coaxially set in outside the sample cell 4 of nuclear magnetic resonance analysis of fluid instrument
Portion, the center hole without magnetic sealing plate 5 of unsealed one end connection nuclear magnetic resonance analysis of fluid instrument；
First solenoid coil 2 is sheathed on one end far from no magnetic sealing plate 5 on coil brace 1；
Second solenoid coil 3 is sheathed on coil brace 1 close to one end of no magnetic sealing plate 5.
Conventionally, as the sample of fluid composition analysis instrument internal flow is oil well produced liquid, contain crude oil, day
The impurity such as the chemical agent added and the sand grains of stratum output needed for right gas, water flooding, the production of other oil fields, therefore run in instrument
In the process, sample pipe surface is most probably precipitated in crude oil wax, asphalitine attachment, influence the analysis result of fluid composition；Also
May be worn by sand grains leads to the perforation of sample tube wall, damage.
By the structure of Fig. 1 it is found that in the utility model embodiment, coil brace 1 is coaxially set in nmr flow body
Outside the sample cell 4 of analyzer, sample cell is conveniently replaceable without extracting entire sample cell 4 out；Coil brace 1 unsealed one
The center hole without magnetic sealing plate 5 of end connection nuclear magnetic resonance analysis of fluid instrument, the inflow for fluid；First solenoid coil 2,
The component analysis parameter to stationary fluid: T can be achieved1Relaxation time or T2The on-line measurement in relaxation time；Second solenoid coil
3, it can be achieved that component analysis parameter to stationary fluid: T2The on-line measurement in relaxation time and diffusion coefficient D, while realizing convection current
The on-line measurement of the flow velocity of dynamic fluid.
In one embodiment, one end of the first solenoid coil 2 can be connect with spectrometer 6, the other end in no magnetic sealing plate 5
Tuning circuit connection, tuning circuit can connect with spectrometer 6, and the first solenoid coil 2, tuning circuit and spectrometer 6 form
One access；One end of second solenoid coil 3 can be connect with spectrometer 6, and the other end connects with the tuning circuit in no magnetic sealing plate 5
It connects, tuning circuit can be connect with spectrometer 6, and the second solenoid coil 3, tuning circuit and spectrometer 6 also form an access.It will
Aerial coil, bracket, sample cell and tuning circuit are packaged into the structure of an entirety, ensure that the stability of antenna.
Fig. 2 is to analyze for the antenna of nuclear magnetic resonance analysis of fluid instrument in fluid sample composition in the utility model embodiment
Parameter measurement schematic diagram, as shown in Fig. 2, in the specific implementation, the first solenoid coil 2 and the second solenoid coil 3 can be set
In in the space of the search coverage magnet 7 of nuclear magnetic resonance analysis of fluid instrument.
In one embodiment, the first solenoid coil 2 can be placed in 8 range of homogeneous static magnetic field.
In one embodiment, the second solenoid coil 3 can be placed in 9 range of gradient magnetostatic field.
In one embodiment, the first solenoid coil 2 is used for: passing through the control of the tuning circuit in no magnetic sealing plate 5 in spectrometer 6
Under system, emit pulse train；Receives echo-signal string.
For example, the fluid sample for being analysed to component flows into sample cell 4, after fluid sample is static, by the first solenoid
Coil 2 is placed in 8 range of homogeneous static magnetic field, connects spectrometer 6 and the first solenoid coil 2, and spectrometer 6 controls the by tuning circuit
One solenoid coil 2 can emit saturation recovery (SR) pulse train, and receives echo-signal string, can measure and obtain fluid sample
The T of each component2Then relaxation time carries out inverting to the echo-signal string measured, obtains the T of each component2Spectrum, works as each component
T2When the spectral peak of spectrum is not overlapped, the T of each component can be passed through2The spectral peak of spectrum analyzes fluid sample composition.
It is placed in 8 range of homogeneous static magnetic field above by by the first solenoid coil 2, for obtaining fluid sample parameter T2
The process in relaxation time is only for example, and the first solenoid coil 2 is placed in 8 range of homogeneous static magnetic field, fluid can also be measured
The T of sample1Relaxation time, relevant change case should all fall into the protection scope of the utility model.
In addition, transmitting saturation recovery pulse train is only for example above, spectrometer 6 controls the first solenoid by tuning circuit
Coil 2 can also emit other kinds of pulse train, such as inversion recovery (IR) pulse train, and receives echo-signal string, with
Measure the T of fluid sample1Relaxation time or T2Relaxation time.
In one embodiment, the second solenoid coil 3 is used for: passing through the control of the tuning circuit in no magnetic sealing plate 5 in spectrometer 6
System is lower to emit pulse train；Receives echo-signal string.
For example, the fluid sample for being analysed to component flows into sample cell 4, after fluid sample is static, if passing through the first spiral shell
The T of each component for the fluid sample that spool coil 2 obtains2When the peak spectrum of spectrum has overlapping, need through measurement fluid sample
Component analysis parameter: T2Relaxation time and diffusion coefficient D analyze fluid sample composition, at this point, the second solenoid coil 3 is set
In in 9 range of gradient magnetostatic field, connecting spectrometer 6 and the second solenoid coil 3, spectrometer 6 controls the second helical by tuning circuit
Pipeline circle 3 emits pulse train, and receives echo-signal string, can measure and obtains the T of each component of fluid sample2Relaxation time,
According to the T of each component2Relaxation time can calculate diffusion coefficient D using following formula:
Wherein, M is magnetization vector；
M0For magnetization vector initial value；
τ is pulse sequence interval；
γ is gyromagnetic ratio, represents nuclear-magnetism intensity；
G is magnetic field gradient.
Pass through the T of each component2Relaxation time and diffusion coefficient D can analyze fluid sample composition.
In another example, the fluid sample for being analysed to component flows into sample cell 4, static without waiting for fluid sample, will
Second solenoid coil 3 is placed in 9 range of gradient magnetostatic field, connects spectrometer 6 and the second solenoid coil 3, spectrometer 6 pass through tuning
The second solenoid coil of circuit control 3 emits CPMG pulse sequence, and receives echo-signal string, is then not necessarily to echo-signal string
Inverting is carried out, the speed to decay by echo-signal string can quantify to obtain the flow velocity of streaming flow.
The above transmitting CPMG pulse sequence is only for example, and spectrometer 6 controls the first solenoid coil 2 by tuning circuit and may be used also
To emit other kinds of pulse train, and receives echo-signal string, to measure the flow velocity of fluid sample.
In one embodiment, the second solenoid coil 3 is spaced apart set distance with the first solenoid coil 2, the setting away from
It is adjusted from according to 8 range of homogeneous static magnetic field and 9 range of gradient magnetostatic field, makes the first solenoid coil 2 and the second solenoid
Coil 3 is completely in 9 range of 8 range of homogeneous static magnetic field and gradient magnetostatic field of coincidence measurement requirement.
In one embodiment, there is wire casing outside coil brace 1, for fixing the first solenoid coil 2 and the second solenoid
Coil 3.
A specific embodiment is given below, illustrates the antenna for nuclear magnetic resonance analysis of fluid instrument in measurement stationary fluid ginseng
Application when number.Fig. 3 is for the antenna of nuclear magnetic resonance analysis of fluid instrument in the utility model embodiment in measurement stationary fluid
Flow chart when parameter.
As shown in figure 3, fluid sample (oil water mixture of area's output such as to be measured) is flowed into sample cell first；
After fluid sample is static, spectrometer 6 and the first solenoid coil 2 are connected, spectrometer 6 passes through tuning circuit control first
Solenoid coil emits saturation recovery pulse train, and receives echo-signal string；
According to the saturation recovery pulse train of the first solenoid coil 2 transmitting and received echo-signal string, fluid is obtained
The T of each component of sample2Relaxation time；
Inverting is carried out to received echo-signal string, obtains the T of each component of fluid sample2Spectrum；
In the T of each component2When the spectral peak of spectrum is not overlapped, pass through T2The spectral peak of spectrum analyzes fluid sample composition；
In the T of each component2When the peak overlap of spectrum, the first solenoid coil 2 is disconnected, connects the second solenoid coil 3, spectrum
Instrument 6 controls the second solenoid coil 3 by tuning circuit and emits CPMG pulse sequence, and receives echo-signal string；
According to CPMG pulse sequence and received echo-signal string that the second solenoid coil 3 emits, measurement obtains fluid
The T of each component of sample2Relaxation time, according to the T of each component2Relaxation time calculates diffusion coefficient D using following formula:
Wherein, M is magnetization vector；
M0For magnetization vector initial value；
τ is pulse sequence interval；
γ is gyromagnetic ratio, represents nuclear-magnetism intensity；
G is magnetic field gradient.
Pass through the T of each component2Relaxation time and diffusion coefficient D analyze fluid sample composition.
Another embodiment is given below, illustrates the antenna for nuclear magnetic resonance analysis of fluid instrument in the stream for measuring streaming flow
Application when fast.
The fluid sample (oil water mixture of area's output such as to be measured) of flowing is flowed into sample cell；
The second solenoid coil 3 is connected, spectrometer 6 controls the second solenoid coil 3 by tuning circuit and emits CPMG pulse
Sequence, and receives echo-signal string；
The speed of echo-signal string decaying is analyzed, quantization obtains the speed of streaming flow.
In the utility model embodiment, coil brace 1 is coaxially set in outside the sample cell 4 of nuclear magnetic resonance analysis of fluid instrument
Portion is conveniently replaceable sample cell without extracting entire sample cell out；The unsealed one end of coil brace 1 connects nuclear magnetic resonance fluid
The center hole without magnetic sealing plate 5 of analyzer, the inflow for fluid；First solenoid coil 2 is, it can be achieved that fluid samples
Component analysis parameter: T1Relaxation time or T2The on-line measurement in relaxation time；Second solenoid coil 3 is, it can be achieved that fluid samples
Component analysis parameter: T2The on-line measurement in relaxation time and diffusion coefficient D, while realizing to the online of the flow velocity of streaming flow
Measurement.
In the utility model embodiment, the first solenoid coil 2 can be placed in 8 range of homogeneous static magnetic field, pass through spectrum
Instrument 6 emits pulse train, and receives echo-signal string, can measure the component analysis parameter of fluid sample: T1Relaxation time or T2
Relaxation time；Second solenoid coil 3 can be placed in 9 range of gradient magnetostatic field, be spaced apart centainly with the first solenoid coil 2
Distance can measure the component analysis parameter of fluid: T for emitting pulse train, and receives echo-signal string by spectrometer 62
Relaxation time and diffusion coefficient D, while the flow velocity of streaming flow can be measured.The utility model proposes be used for nmr flow
The antenna of body analyzer can be applied to the on-line measurement of the component analysis parameter of stationary fluid, be divided with realizing fluid components
Analysis, while can be applied to the on-line measurement of the flow velocity of streaming flow, measurement process is environmentally protective；In addition, the antenna is integrated in
In nuclear magnetic resonance analysis of fluid instrument, it ensure that the stability of antenna, effectively extend the physical life of antenna.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that being not used to limit this foregoing is merely specific embodiment of the utility model
The protection scope of utility model, within the spirit and principle of the utility model, any modification for being made, changes equivalent replacement
Into etc., it should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of antenna for nuclear magnetic resonance analysis of fluid instrument characterized by comprising coil brace (1), the first solenoid
Coil (2) and the second solenoid coil (3), wherein
Coil brace (1) is the cylinder of an end closure, is coaxially set in the sample cell (4) of nuclear magnetic resonance analysis of fluid instrument outside
Portion, the center hole without magnetic sealing plate (5) of unsealed one end connection nuclear magnetic resonance analysis of fluid instrument；
First solenoid coil (2) is sheathed on one end far from no magnetic sealing plate (5) on coil brace (1)；
Second solenoid coil (3) is sheathed on coil brace (1) close to one end of no magnetic sealing plate (5).
2. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as described in claim 1, which is characterized in that the first solenoid coil
(2) one end is connect with spectrometer (6), and the other end is connect with the tuning circuit in no magnetic sealing plate (5).
3. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as described in claim 1, it is characterised in that；Second solenoid coil
(3) one end is connect with spectrometer (6), and the other end is connect with the tuning circuit in no magnetic sealing plate (5).
4. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as described in claim 1, which is characterized in that the first solenoid coil
(2) it is placed in homogeneous static magnetic field (8) range of nuclear magnetic resonance analysis of fluid instrument.
5. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as described in claim 1, which is characterized in that the second solenoid coil
(3) it is placed in gradient magnetostatic field (9) range of nuclear magnetic resonance analysis of fluid instrument.
6. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as claimed in claim 2, which is characterized in that the first solenoid coil
(2) it is used for: in spectrometer (6) by emitting pulse train under the control of the tuning circuit in no magnetic sealing plate (5)；Receive echo letter
Number string.
7. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as claimed in claim 3, which is characterized in that the second solenoid coil
(3) it is used for: emitting pulse train in the case where spectrometer (6) is by the control of the tuning circuit in no magnetic sealing plate (5)；Receives echo-signal
String.
8. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as described in claim 1, which is characterized in that the second solenoid coil
(3) set distance is spaced apart with the first solenoid coil (2).
9. being used for the antenna of nuclear magnetic resonance analysis of fluid instrument as described in claim 1, which is characterized in that the coil brace
(1) the external wire casing having for fixing the first solenoid coil (2) and the second solenoid coil (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821799170.0U CN209088048U (en) | 2018-11-02 | 2018-11-02 | Antenna for nuclear magnetic resonance analysis of fluid instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821799170.0U CN209088048U (en) | 2018-11-02 | 2018-11-02 | Antenna for nuclear magnetic resonance analysis of fluid instrument |
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| Publication Number | Publication Date |
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| CN209088048U true CN209088048U (en) | 2019-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816514A (en) * | 2019-11-15 | 2021-05-18 | 中国石油天然气股份有限公司 | Antenna moving device, nuclear magnetic resonance fluid analyzer and related detection method |
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2018
- 2018-11-02 CN CN201821799170.0U patent/CN209088048U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816514A (en) * | 2019-11-15 | 2021-05-18 | 中国石油天然气股份有限公司 | Antenna moving device, nuclear magnetic resonance fluid analyzer and related detection method |
| CN112816514B (en) * | 2019-11-15 | 2024-03-26 | 中国石油天然气股份有限公司 | Antenna moving device, nuclear magnetic resonance fluid analyzer and related detection method |
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