CN108918573A - Oil-water two-phase flow constituent content measurement method and system - Google Patents
Oil-water two-phase flow constituent content measurement method and system Download PDFInfo
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Abstract
The present invention provides a kind of oil-water two-phase flow constituent content measurement methods and system, the method to include：Obtain the flow velocity of relevant parameter and oil water mixture of the oil water mixture in area to be measured before and after magnetization；The magnetization vector amplitude ratio for obtaining the oil water mixture of different oil contents is calculated according to relevant parameter of the oil water mixture before and after magnetization；According to the flow velocity of the magnetization vector amplitude ratio and oil water mixture, opening relationships equation；Acquire the magnetization vector amplitude ratio of oil water mixture to be measured and the flow velocity of oil water mixture to be measured；According to the relation equation, the flow velocity of the magnetization vector amplitude ratio of the oil water mixture to be measured and the oil water mixture to be measured, the constituent content of oil-water two-phase flow is obtained.
Description
Technical field
The present invention relates to oil gas metering field, espespecially a kind of oil-water two-phase flow constituent content measurement method and system.
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.It recovers the oil in production, for many years, water-oil phase measures especially
Be on-line metering it is always a global problem, makes slow progress.The common water content measurement technology in scene is that sampling stands one section
After time, every content is read again after grease layering.This method has many deficiencies：(1) accuracy is not high, man's activity because
It is plain big；(2) inefficiency；(3) additional human cost；(4) sample is directly toppled in most cases after completing measurement, pollutes ring
Border, and for containing gas well, sampling has certain security risk.As what oil-gas reservoir fine-grained management and safety and environmental protection required mentions
It rises, traditional measurement means have been unable to satisfy requirement, the measurement means of urgent need efficiently, accurate, green, safe.
Low-field nuclear magnetic resonance technology is currently a kind of fluid inside component analysis technology of mainstream, it is advantageous that non-invade
Enter, be environmentally protective, efficiently and accurately measurement means, be applied to Oil Field carry out oil gas on-line measurement have well before
Scape.But the application difficulty in on-line measurement field of nuclear magnetic resonance technique is quite big, and it is total to be primarily due to conventional indoor measurement nuclear-magnetism
Vibration gauge device and method are simultaneously unsatisfactory for on-line measurement, the especially requirement of streaming flow on-line measurement.Currently, low field nuclear-magnetism is total
Vibration technology mainly uses dynamical surveying mode, i.e. sample and probe carries out NMR signal in the state of keeping opposing stationary
Measurement.Nuclear Magnetic Resonance Measurement under flow regime can face many problems, including magnetizing time is insufficient, the acquisition loss of signal, stream
Stereoscopic diffusion coefficient becomes larger etc., seriously affects accuracy of measurement.
Currently, domestic, without the relevant technologies, Dutch Shell Co. Ltd develops a set of nuclear magnetic resonance multi-phase flowmeter in the world,
In include grease constituent content measurement method, but this method need on flowmeter install motor come drive premagnetization section magnet revolve
Turn, to switch the magnetic field of this section, and the presence of motor can have an impact magnetic field's regularity, more than scheme does not consider
Influence of the factor to grease constituent content is measured causes final measurement inaccurate.
Summary of the invention
Present invention aims at oil-water two-phase flow on-line metering problem is directed to, a kind of oil based on low-field nuclear magnetic resonance is proposed
Water two phase flow constituent content on-line measurement apparatus system and method.
In order to achieve the above object, oil-water two-phase flow constituent content measurement method provided by the present invention specifically includes：Obtain to
Survey the flow velocity of relevant parameter and oil water mixture of the oil water mixture in area before and after magnetization；According to the oil water mixture in magnetic
The relevant parameter for changing front and back calculates the magnetization vector amplitude ratio for obtaining the oil water mixture of different oil contents；According to the magnetization
The flow velocity of amplitude of the vector ratio and oil water mixture, opening relationships equation；Acquire the magnetization vector amplitude of oil water mixture to be measured
The flow velocity of ratio and oil water mixture to be measured；According to the magnetization vector amplitude of the relation equation, the oil water mixture to be measured
The flow velocity of ratio and the oil water mixture to be measured, obtains the constituent content of oil-water two-phase flow.
In an embodiment of the present invention, the relevant parameter according to the oil water mixture before and after magnetization, which calculates, obtains difference
The magnetization vector amplitude ratio of the oil water mixture of oil content includes：According to nuclear magnetic resonance area length and the stream of oil water mixture
Speed calculates the magnetizing time for obtaining the oil water mixture；The magnetization vector of magnetization front and back oil sample is obtained according to the magnetizing time
The magnetization vector amplitude of amplitude and magnetization front and back water sample；It is sweared according to the magnetization of the magnetization vector amplitude of the oil sample and the water sample
Discharge amplitude calculates the magnetization degree for obtaining magnetization degree and water oily in the oil water mixture before and after the magnetization；According to described
The magnetization degree of oily magnetization degree and water, obtains institute in oil content and magnetization the front and back oil water mixture of oil water mixture
State magnetization vector amplitude ratio of the oil water mixture before and after magnetization.
In an embodiment of the present invention, the magnetization vector amplitude and magnetic of magnetization front and back oil sample are obtained according to the magnetizing time
The magnetization vector amplitude of water sample includes before and after changing：Be calculated by the following formula obtain magnetization front and back oil sample magnetization vector amplitude and
The magnetization vector amplitude of magnetization front and back water sample：
In above formula, t=Tw1 or Tw2, Tw1 and Tw2 are respectively the magnetizing time for magnetizing front and back；M0oAnd M0wIt is oil sample respectively
With magnetization vector of the water sample in predetermined magnetic field, Mzo(t) and MzwIt (t) is the magnetization vector width of oil sample and water sample in t moment respectively
Degree, T1oAnd T1wThe respectively longitudinal relaxation time of oily longitudinal relaxation time and water flooding.
In an embodiment of the present invention, according to the oil content of the oil water mixture and magnetization the front and back oil water mixture
The magnetization degree of middle oil and the magnetization degree of water obtain magnetization vector amplitude ratio packet of the oil water mixture before and after magnetization
Contain：According to the magnetization of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Degree calculates the magnetization degree for obtaining the oil water mixture before and after magnetization；According to the oil water mixture before and after magnetization
Magnetization degree calculate the magnetization vector amplitude ratio for obtaining the oil water mixture before and after magnetization；Wherein, according to the oil
The magnetization degree of oily magnetization degree and water, calculates and obtains in oil content and magnetization the front and back oil water mixture of aqueous mixtures
Magnetization degree of the oil water mixture before and after magnetization include：It is calculated by the following formula and obtains the oil water mixture in magnetic
Change the magnetization degree of front and back：
K=aKo+(1-a)·Kw；
In above formula, a is oil content, and K is magnetization degree of the oil water mixture before and after magnetization, KoAnd KwRespectively magnetic
Change the magnetization degree of magnetization degree and water oily in the oil water mixture of front and back.
The present invention also provides a kind of oil-water two-phase flow constituent content measuring system, the system include nmr probe,
Data acquisition device, computing device, model construction device and analytical equipment；The data acquisition device is for obtaining area to be measured
The flow velocity of relevant parameter and oil water mixture of the oil water mixture before and after magnetization；The computing device is used for according to the grease
Relevant parameter of the mixture before and after magnetization calculates the magnetization vector amplitude ratio for obtaining the oil water mixture of different oil contents；Institute
Model construction device is stated for the flow velocity according to the magnetization vector amplitude ratio and oil water mixture, opening relationships equation；Institute
The oil water mixture delivery outlet that nmr probe is set to area to be measured is stated, for magnetizing oil water mixture to be measured and detection institute
State the magnetization degree of oil water mixture to be measured and the flow velocity of oil water mixture to be measured；The analytical equipment is used for according to described to be measured
The magnetization degree of oil water mixture obtains the magnetization vector amplitude ratio of oil water mixture to be measured, and according to the relationship side
The flow velocity of journey, the magnetization vector amplitude ratio of the oil water mixture to be measured and the oil water mixture to be measured obtains grease two
The mutually constituent content of stream.
In an embodiment of the present invention, the nmr probe includes premagnetization module, detecting module and solenoid day
Line；The premagnetization module is set on the outside of the pipeline of the oil water mixture delivery outlet in the area to be measured, for be measured to magnetizing
Oil water mixture；The solenoid antenna is set to after the premagnetization module, and the grease for being wound in the area to be measured is mixed
On the pipeline for closing object delivery outlet；The detecting module is set to the oil mixing with water in the area to be measured after the premagnetization module
On the outside of the pipeline of object delivery outlet, for detecting the magnetization degree of the oil water mixture to be measured by the solenoid antenna.
In an embodiment of the present invention, the computing device also includes ratio calculation module, and the ratio calculation module is used
In：The magnetizing time of the oil water mixture is obtained according to the flow relocity calculation of nuclear magnetic resonance area length and oil water mixture；Root
The magnetization vector amplitude of magnetization front and back oil sample and the magnetization vector amplitude of magnetization front and back water sample are obtained according to the magnetizing time；According to
The magnetization vector amplitude of the oil sample and the magnetization vector amplitude of the water sample calculate and obtain the oil mixing with water before and after magnetization
The magnetization degree of oily magnetization degree and water in object；It is mixed according to the oil content of the oil water mixture and magnetization the front and back grease
The magnetization degree for closing magnetization degree and water oily in object, obtains magnetization vector Amplitude Ratio of the oil water mixture before and after magnetization
Value.
In an embodiment of the present invention, the ratio calculation module also includes magnetization vector computing unit, the magnetization arrow
Water sample before and after magnetization vector amplitude and magnetization of the amount computing unit for being calculated by the following formula acquisition magnetization front and back oil sample
Magnetization vector amplitude：
In above formula, t=Tw1 or Tw2, Tw1 and Tw2 are respectively the magnetizing time for magnetizing front and back；M0oAnd M0wIt is oil sample respectively
With magnetization vector of the water sample in predetermined magnetic field, Mzo(t) and MzwIt (t) is the magnetization vector width of oil sample and water sample in t moment respectively
Degree, T1oAnd T1wThe respectively longitudinal relaxation time of oily longitudinal relaxation time and water flooding.
In an embodiment of the present invention, the ratio calculation module also includes comparing unit, and the comparing unit is used for：Root
According to the magnetization degree of magnetization degree and water oily in oil content and magnetization the front and back oil water mixture of the oil water mixture,
Calculate the magnetization degree for obtaining the oil water mixture before and after magnetization；According to magnetization of the oil water mixture before and after magnetization
Degree calculates the magnetization vector amplitude ratio for obtaining the oil water mixture before and after magnetization；Wherein, according to the oil mixing with water
The magnetization degree of oily magnetization degree and water, calculates and obtains the oil in oil content and magnetization the front and back oil water mixture of object
Magnetization degree of the aqueous mixtures before and after magnetization include：It is calculated by the following formula and obtains the oil water mixture before and after magnetization
Magnetization degree：
K=aKo+(1-a)·Kw；
In above formula, a is oil content, and K is magnetization degree of the oil water mixture before and after magnetization, KoAnd KwRespectively magnetic
Change the magnetization degree of magnetization degree and water oily in the oil water mixture of front and back.
The present invention also provides a kind of computer equipment, including memory, processor and storage on a memory and can located
The computer program run on reason device, the processor realize the above method when executing the computer program.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has in execution
State the computer program of method.
Oil-water two-phase flow constituent content measurement method and system provided by the present invention, which can be realized, will make nuclear magnetic resonance technique
It can be used for oil-gas field development scene, carry out the online, green of oil-water two-phase flow component content, non-intrusion type, gamut detection, help
The accurate detection of power oil-water two-phase flow constituent content.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is oil-water two-phase flow constituent content measurement method provided by one embodiment of the invention；
Fig. 2 is oil-water two-phase flow constituent content measurement method provided by one embodiment of the invention；
Fig. 3 is oil-water two-phase flow constituent content measuring system provided by one embodiment of the invention；
Fig. 4 is nmr probe in oil-water two-phase flow constituent content measuring system provided by one embodiment of the invention
Structural schematic diagram；
Fig. 5 is the structure of valve connection in oil-water two-phase flow constituent content measuring system provided by one embodiment of the invention
Schematic diagram；
Fig. 6 is the performance of relation equation in oil-water two-phase flow constituent content measurement method provided by one embodiment of the invention
Schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
It please refers to shown in Fig. 1, oil-water two-phase flow constituent content measurement method provided by the present invention specifically includes：S101 is obtained
Take the flow velocity of relevant parameter and oil water mixture of the oil water mixture in area to be measured before and after magnetization；S102 is mixed according to the grease
It closes relevant parameter of the object before and after magnetization and calculates the magnetization vector amplitude ratio for obtaining the oil water mixture of different oil contents；S103
According to the flow velocity of the magnetization vector amplitude ratio and oil water mixture, opening relationships equation；S104 acquires oil mixing with water to be measured
The magnetization vector amplitude ratio of object and the flow velocity of oil water mixture to be measured；S105 is according to the relation equation, the grease to be measured
The flow velocity of the magnetization vector amplitude ratio of mixture and the oil water mixture to be measured, obtains the constituent content of oil-water two-phase flow.
This method is suitable for oil recovery gas recovery field, but is not limited to the field, can be used for related to two phase flow fluid components content
The engineer application field of on-line measurement；Wherein, the oil water mixture and oil water mixture to be measured in the area to be measured can pass through system
One nuclear magnetic resonance magnetizing assembly is magnetized, the device specific structure will in subsequent embodiment overall description, certainly, this field
Related technical personnel are when it is found that present magnetization technology can also be used in the device magnetizes, the present invention does not do specific limit herein
System；With this, the component situation of oil water mixture to be measured can be obtained in real time by way of magnetic resonance detection, not only measurement essence
Standard, and efficiency greatly improves.
It please refers to shown in Fig. 2, in an embodiment of the present invention, above-mentioned steps S102 may include：According to nuclear magnetic resonance area
The flow relocity calculation of length and oil water mixture obtains the magnetizing time of the oil water mixture；Magnetic is obtained according to the magnetizing time
Change the magnetization vector amplitude of front and back oil sample and the magnetization vector amplitude of magnetization front and back water sample；According to the magnetization vector width of the oil sample
The magnetization vector amplitude of degree and the water sample calculates and obtains magnetization degree and water oily in the oil water mixture before and after the magnetization
Magnetization degree；According to magnetization degree oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture and
The magnetization degree of water obtains magnetization vector amplitude ratio of the oil water mixture before and after magnetization.
In the above-described embodiments, before magnetization vector amplitude and magnetization that magnetization front and back oil sample is obtained according to the magnetizing time
The magnetization vector amplitude of water sample includes afterwards：It is calculated by the following formula the magnetization vector amplitude and magnetization for obtaining magnetization front and back oil sample
The magnetization vector amplitude of front and back water sample：
In above formula, t=Tw1 or Tw2, Tw1 and Tw2 are respectively the magnetizing time for magnetizing front and back；M0oAnd M0wIt is oil sample respectively
With magnetization vector of the water sample in predetermined magnetic field, Mzo(t) and MzwIt (t) is the magnetization vector width of oil sample and water sample in t moment respectively
Degree, T1oAnd T1wThe respectively longitudinal relaxation time of oily longitudinal relaxation time and water flooding.
In an embodiment of the present invention, according to the oil content of the oil water mixture and magnetization the front and back oil water mixture
The magnetization degree of middle oil and the magnetization degree of water obtain magnetization vector amplitude ratio packet of the oil water mixture before and after magnetization
Contain：According to the magnetization of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Degree calculates the magnetization degree for obtaining the oil water mixture before and after magnetization；According to the oil water mixture before and after magnetization
Magnetization degree calculate the magnetization vector amplitude ratio for obtaining the oil water mixture before and after magnetization；Wherein, according to the oil
The magnetization degree of oily magnetization degree and water, calculates and obtains in oil content and magnetization the front and back oil water mixture of aqueous mixtures
Magnetization degree of the oil water mixture before and after magnetization include：It is calculated by the following formula and obtains the oil water mixture in magnetic
Change the magnetization degree of front and back：
K=aKo+(1-a)·Kw；
In above formula, a is oil content, and K is magnetization degree of the oil water mixture before and after magnetization, KoAnd KwRespectively magnetic
Change the magnetization degree of magnetization degree and water oily in the oil water mixture of front and back.
It please refers to shown in Fig. 3, the present invention also provides a kind of oil-water two-phase flow constituent content measuring system, the system includes
Nmr probe, data acquisition device, computing device, model construction device and analytical equipment；The data acquisition device is used
In the flow velocity for obtaining relevant parameter and oil water mixture of the oil water mixture in area to be measured before and after magnetization；The computing device is used
In the magnetization for the oil water mixture for calculating the different oil contents of acquisition according to relevant parameter of the oil water mixture before and after magnetization
Amplitude of the vector ratio；The model construction device is used for the flow velocity according to the magnetization vector amplitude ratio and oil water mixture,
Opening relationships equation；The nmr probe is set to the oil water mixture delivery outlet in area to be measured, for magnetizing grease to be measured
The flow velocity of the magnetization degree and oil water mixture to be measured of mixture and the detection oil water mixture to be measured；The analytical equipment
For obtaining the magnetization vector amplitude ratio of oil water mixture to be measured according to the magnetization degree of the oil water mixture to be measured, and
According to the relation equation, the stream of the magnetization vector amplitude ratio of the oil water mixture to be measured and the oil water mixture to be measured
Speed obtains the constituent content of oil-water two-phase flow.
It please refers to shown in Fig. 4, in an embodiment of the present invention, the nmr probe includes premagnetization module, detection
Module and solenoid antenna；The premagnetization module is set on the outside of the pipeline of the oil water mixture delivery outlet in the area to be measured,
For to magnetizing oil water mixture to be measured；The solenoid antenna is set to after the premagnetization module, and is wound in described
On the pipeline of the oil water mixture delivery outlet in area to be measured；The detecting module be set to after the premagnetization module it is described to
It surveys on the outside of the pipeline of the oil water mixture delivery outlet in area, for detecting the oil water mixture to be measured by the solenoid antenna
Magnetization degree.It can form by Nuclear Magnetic Resonance Measurement technical application in petroleum production engineering field by the device and be mounted on oil recovery
Oil-water two-phase flow constituent content measuring equipment in well well head or situ metrology；Measurement process of the equipment in valve switch
In, production of hydrocarbons well and manifold of ground can keep normal production activity, while can be in laboratory and oil field production scene
In freezing winter and in sultry summer, long-term, steady operation under extreme natural environment.
In an embodiment of the present invention, the computing device also may include ratio calculation module, the ratio calculation module
For：The magnetizing time of the oil water mixture is obtained according to the flow relocity calculation of nuclear magnetic resonance area length and oil water mixture；
The magnetization vector amplitude of magnetization front and back oil sample and the magnetization vector amplitude of magnetization front and back water sample are obtained according to the magnetizing time；Root
According to the magnetization vector amplitude of the oil sample and the magnetization vector amplitude of the water sample, it is mixed to calculate acquisition grease before and after magnetization
Close the magnetization degree of magnetization degree and water oily in object；According to the oil content of the oil water mixture and magnetization the front and back grease
The magnetization degree of oily magnetization degree and water in mixture obtains magnetization vector amplitude of the oil water mixture before and after magnetization
Ratio.Wherein, the ratio calculation module also may include magnetization vector computing unit, and the magnetization vector computing unit is for leading to
Cross the magnetization vector amplitude that following formula calculates the magnetization vector amplitude for obtaining magnetization front and back oil sample and magnetization front and back water sample：
In above formula, t=Tw1 or Tw2, Tw1 and Tw2 are respectively the magnetizing time for magnetizing front and back；M0oAnd M0wIt is oil sample respectively
With magnetization vector of the water sample in predetermined magnetic field, Mzo(t) and MzwIt (t) is the magnetization vector width of oil sample and water sample in t moment respectively
Degree, T1oAnd T1wThe respectively longitudinal relaxation time of oily longitudinal relaxation time and water flooding.
In an alternative embodiment of the invention, the ratio calculation module also may include comparing unit, and the comparing unit is used
In：According to the magnetization of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Degree calculates the magnetization degree for obtaining the oil water mixture before and after magnetization；According to the oil water mixture before and after magnetization
Magnetization degree calculate the magnetization vector amplitude ratio for obtaining the oil water mixture before and after magnetization；Wherein, according to the oil
The magnetization degree of oily magnetization degree and water, calculates and obtains in oil content and magnetization the front and back oil water mixture of aqueous mixtures
Magnetization degree of the oil water mixture before and after magnetization include：It is calculated by the following formula and obtains the oil water mixture in magnetic
Change the magnetization degree of front and back：
K=aKo+(1-a)·Kw；
In above formula, a is oil content, and K is magnetization degree of the oil water mixture before and after magnetization, KoAnd KwRespectively magnetic
Change the magnetization degree of magnetization degree and water oily in the oil water mixture of front and back.
It please refers to shown in Fig. 5, effectively to be carried out to the oil water mixture convenient for the nmr probe (NMR probe)
Magnetization, in an embodiment of the present invention, oil-water two-phase flow constituent content measuring system provided by the present invention also includes a plurality of
Valve, those valves are respectively arranged at before and after the nmr probe；In actual measurement oil water mixture to be measured, work as valve
Door #1, #4 and #5 is open-minded, and when #2 and #3 are closed, fluid forward direction flows through NMR probe, that is, firstly flows through premagnetization magnet segment, rear to flow into
Search coverage magnet, premagnetization is worked at this time；Valve #2, #3 and #5 are open-minded, and when #1 and #4 are closed, fluid flows counterflow through NMR
Probe, that is, first flow into search coverage section, after flow through premagnetization magnet areas, premagnetization does not work at this time.In actual production, open
Port valve door #1, #4 and #5 close #2 and #3, measure magnetization vector amplitude K of the fluid after premagnetization2；Open valve #
2, #3 and #5 closes #1 and #4, measures fluid without the magnetization vector amplitude K after premagnetization1.By the signal measured ratio (K1/
K2) as the parameter for identifying oil-water two-phase flow constituent content.According to the flowing velocity v of practical water-oil phase fluid-mixing and measure
Signal ratio (K1/K2), corresponding constituent content value can be found in corresponding relation equation.Certainly, this field the relevant technologies
Personnel can also select that above-mentioned valve quantity and position is arranged according to actual needs, and the present invention does not do any restriction herein.
In the above-described embodiments, the relation equation can be established in several ways, such as be instructed using magnanimity experimental data
Practice the machine learning model completed, corresponds to table using the data that common statistical is established, or use visual image mode
Scale plate detailed citing is done to above-mentioned oil-water two-phase flow constituent content measurement method below by taking scale plate as an example, when
So, relevant technical staff in the field works as it is found that in real work, should be actually needed, various ways opening relationships equation can be used
And its form of expression, the present invention do not do any restrictions to it herein.
The premagnetization section magnet length that device is popped one's head in is set to S0, the magnet length before the internal antenna of probe detection region sets
Determine into S '0, then total magnet length that the fluid Jing Guo premagnetization before by probe measurement, flows through is：
S2=S '0+S0
The subsequent magnet length of search coverage internal antenna is set as S1, in actual measurement, the fluid without premagnetization
Reversed to flow into search coverage, the magnet length passed through is S1。
It is measured when the oil-water two-phase flow fluid without premagnetization magnet passes through probe if the flowing velocity of fluid is v
To fluid only have passed through the of short duration magnetization of the magnet on the right side of the internal antenna of probe detection region, magnetizing time Tw1, such as Fig. 5 institute
Show；When oil-water two-phase flow fluid by premagnetization process passes through probe, measured fluid successively have passed through premagnetization section
The magnetization of magnet before magnet and probe, magnetizing time Tw2。Tw1And Tw2It can be calculated by following formula：
Tw1=S1/v
Tw2=S2/v
It before carrying out in-site measurement, needs to sample in advance, block produces where demarcating surveyed oil mixing with water fluid in the lab
The longitudinal relaxation time T of oil out1oWith the longitudinal relaxation time T of water flooding1w, while needing to know the stream of practical fluid-mixing
Dynamic speed.After given one group of flowing velocity v and the magnetizing time t being calculated, this can be calculated by following two formula
The magnetization degree K of oil and water under group flow velocityoi(i=1,2,3 ...) and Kwi(i=1,2,3 ...).
Wherein, t=Tw1 or Tw2, M0oAnd M0wIt is oil sample and water sample respectively to magnetization final or maximum in fixed-field
Vector, Mzo(t) and MzwIt (t) is the magnetization vector amplitude of oil sample and water sample in t moment respectively.
The intensity of magnetization K of 2 groups of oil and water without premagnetization can be respectively obtained in this way1oi、K1wiPass through premagnetization with 2 groups
Oil and water intensity of magnetization K2oi、K2wi。
For the water-oil phase fluid of different oil contents, magnetization degree K is the weighted value of pure fluid percentage composition, i.e.,：
K=aKo+(1-a)·Kw
Wherein, a is oil content, percentage.
It can thus be concluded that the magnetization degree K of the water-oil phase fluid without premagnetization magnet1With the oil by premagnetization magnet
The magnetization degree K of water two-phase fluid2.The K that will be found out1And K2Value, which is done, to be compared, and can obtain the magnetization vector width in the case of different oil-water ratios
Spend ratio (K1/K2)。
The T measured according to laboratory1oAnd T1wDraw magnetization vector amplitude ratio (K in the case of different oil-water ratios1/K2) and stream
Relationship plate, that is, scale the plate of fast (v), as the foundation that oil-water two-phase flow constituent content in the block measures, specific dial chart
Pressing formula please refers to shown in Fig. 6.
The present invention also provides a kind of computer equipment, including memory, processor and storage on a memory and can located
The computer program run on reason device, the processor realize the above method when executing the computer program.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has in execution
State the computer program of method.
Oil-water two-phase flow constituent content measurement method and system provided by the present invention, which can be realized, will make nuclear magnetic resonance technique
It can be used for oil-gas field development scene, carry out the online, green of oil-water two-phase flow component content, non-intrusion type, gamut detection, help
The accurate detection of power oil-water two-phase flow constituent content.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (11)
1. a kind of oil-water two-phase flow constituent content measurement method, which is characterized in that the method includes：
Obtain the flow velocity of relevant parameter and oil water mixture of the oil water mixture in area to be measured before and after magnetization；
The magnetic for obtaining the oil water mixture of different oil contents is calculated according to relevant parameter of the oil water mixture before and after magnetization
Change amplitude of the vector ratio；
According to the flow velocity of the magnetization vector amplitude ratio and oil water mixture, opening relationships equation；
Acquire the magnetization vector amplitude ratio of oil water mixture to be measured and the flow velocity of oil water mixture to be measured；
According to the relation equation, the magnetization vector amplitude ratio and the oil water mixture to be measured of the oil water mixture to be measured
Flow velocity, obtain the constituent content of oil-water two-phase flow.
2. oil-water two-phase flow constituent content measurement method according to claim 1, which is characterized in that mixed according to the grease
It closes relevant parameter of the object before and after magnetization and calculates and obtain the magnetization vector amplitude ratio of the oil water mixture of different oil contents and include：
The magnetizing time of the oil water mixture is obtained according to the flow relocity calculation of nuclear magnetic resonance area length and oil water mixture；
The magnetization vector amplitude of magnetization front and back oil sample and the magnetization vector width of magnetization front and back water sample are obtained according to the magnetizing time
Degree；
According to the magnetization vector amplitude of the magnetization vector amplitude of the oil sample and the water sample, calculate described in obtaining before and after magnetization
The magnetization degree of oily magnetization degree and water in oil water mixture；
According to the magnetic of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Change degree obtains magnetization vector amplitude ratio of the oil water mixture before and after magnetization.
3. oil-water two-phase flow constituent content measurement method according to claim 2, which is characterized in that when according to the magnetization
Between obtain magnetization front and back oil sample magnetization vector amplitude and magnetization front and back water sample magnetization vector amplitude include：Pass through following formula
Calculate the magnetization vector amplitude of the magnetization vector amplitude for obtaining magnetization front and back oil sample and magnetization front and back water sample：
In above formula, t=Tw1 or Tw2, Tw1 and Tw2 are respectively the magnetizing time for magnetizing front and back；M0oAnd M0wIt is oil sample and water respectively
Magnetization vector of the sample in predetermined magnetic field, Mzo(t) and MzwIt (t) is the magnetization vector amplitude of oil sample and water sample in t moment respectively,
T1oAnd T1wThe respectively longitudinal relaxation time of oily longitudinal relaxation time and water flooding.
4. oil-water two-phase flow constituent content measurement method according to claim 3, which is characterized in that mixed according to the grease
The magnetization degree for closing magnetization degree and water oily in oil content and magnetization the front and back oil water mixture of object, obtains the grease
Magnetization vector amplitude ratio of the mixture before and after magnetization include：
According to the magnetic of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Change degree calculates the magnetization degree for obtaining the oil water mixture before and after magnetization；According to the oil water mixture before magnetization
Magnetization degree afterwards calculates the magnetization vector amplitude ratio for obtaining the oil water mixture before and after magnetization；
Wherein, according to magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Magnetization degree, calculate and obtain the magnetization degree of the oil water mixture before and after magnetization and include：It is calculated by the following formula and obtains
Obtain magnetization degree of the oil water mixture before and after magnetization：
K=aKo+(1-a)·Kw；
In above formula, a is oil content, and K is magnetization degree of the oil water mixture before and after magnetization, KoAnd KwBefore respectively magnetizing
The magnetization degree of magnetization degree and water oily in the oil water mixture afterwards.
5. a kind of oil-water two-phase flow constituent content measuring system, which is characterized in that the system includes nmr probe, data
Acquisition device, computing device, model construction device and analytical equipment；
The data acquisition device is used to obtain relevant parameter and oil mixing with water of the oil water mixture in area to be measured before and after magnetization
The flow velocity of object；
The computing device is used for the relevant parameter according to the oil water mixture before and after magnetization and calculates the different oil contents of acquisition
Oil water mixture magnetization vector amplitude ratio；
The model construction device is used for the flow velocity according to the magnetization vector amplitude ratio and oil water mixture, opening relationships side
Journey；
The nmr probe is set to the oil water mixture delivery outlet in area to be measured, for magnetize oil water mixture to be measured and
Detect the magnetization degree of the oil water mixture to be measured and the flow velocity of oil water mixture to be measured；
The analytical equipment is used to obtain the magnetization of oil water mixture to be measured according to the magnetization degree of the oil water mixture to be measured
Amplitude of the vector ratio, and according to the relation equation, the magnetization vector amplitude ratio of the oil water mixture to be measured and described
The flow velocity of oil water mixture to be measured obtains the constituent content of oil-water two-phase flow.
6. oil-water two-phase flow constituent content measuring system according to claim 5, which is characterized in that the nuclear magnetic resonance is visited
Head includes premagnetization module, detecting module and solenoid antenna；
The premagnetization module is set on the outside of the pipeline of the oil water mixture delivery outlet in the area to be measured, for be measured to magnetizing
Oil water mixture；
The solenoid antenna is set to after the premagnetization module, and is wound in the oil water mixture output in the area to be measured
On the pipeline of mouth；
The detecting module is set to the pipeline of the oil water mixture delivery outlet in the area to be measured after the premagnetization module
Outside, for detecting the magnetization degree of the oil water mixture to be measured by the solenoid antenna.
7. oil-water two-phase flow constituent content measuring system according to claim 5, which is characterized in that the computing device is also
Comprising ratio calculation module, the ratio calculation module is used for：
The magnetizing time of the oil water mixture is obtained according to the flow relocity calculation of nuclear magnetic resonance area length and oil water mixture；
The magnetization vector amplitude of magnetization front and back oil sample and the magnetization vector width of magnetization front and back water sample are obtained according to the magnetizing time
Degree；
According to the magnetization vector amplitude of the magnetization vector amplitude of the oil sample and the water sample, calculate described in obtaining before and after magnetization
The magnetization degree of oily magnetization degree and water in oil water mixture；
According to the magnetic of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Change degree obtains magnetization vector amplitude ratio of the oil water mixture before and after magnetization.
8. oil-water two-phase flow constituent content measuring system according to claim 7, which is characterized in that the ratio calculation mould
Block also includes magnetization vector computing unit, and the magnetization vector computing unit is for being calculated by the following formula acquisition magnetization front and back
The magnetization vector amplitude of oil sample and the magnetization vector amplitude of magnetization front and back water sample：
In above formula, t=Tw1 or Tw2, Tw1 and Tw2 are respectively the magnetizing time for magnetizing front and back；M0oAnd M0wIt is oil sample and water respectively
Magnetization vector of the sample in predetermined magnetic field, Mzo(t) and MzwIt (t) is the magnetization vector amplitude of oil sample and water sample in t moment respectively,
T1oAnd T1wThe respectively longitudinal relaxation time of oily longitudinal relaxation time and water flooding.
9. oil-water two-phase flow constituent content measuring system according to claim 8, which is characterized in that the ratio calculation mould
Block also includes comparing unit, and the comparing unit is used for：
According to the magnetic of magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Change degree calculates the magnetization degree for obtaining the oil water mixture before and after magnetization；According to the oil water mixture before magnetization
Magnetization degree afterwards calculates the magnetization vector amplitude ratio for obtaining the oil water mixture before and after magnetization；
Wherein, according to magnetization degree and water oily in the oil content of the oil water mixture and magnetization the front and back oil water mixture
Magnetization degree, calculate and obtain the magnetization degree of the oil water mixture before and after magnetization and include：It is calculated by the following formula and obtains
Obtain magnetization degree of the oil water mixture before and after magnetization：
K=aKo+(1-a)·Kw；
In above formula, a is oil content, and K is magnetization degree of the oil water mixture before and after magnetization, KoAnd KwBefore respectively magnetizing
The magnetization degree of magnetization degree and water oily in the oil water mixture afterwards.
10. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor realizes any side of Claims 1-4 when executing the computer program
Method.
11. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has perform claim
It is required that the computer program of 1 to 4 any the method.
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