CN105675501B - A kind of fluid composition analysis instrument and its detection channels method for arranging - Google Patents
A kind of fluid composition analysis instrument and its detection channels method for arranging Download PDFInfo
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- CN105675501B CN105675501B CN201610191652.7A CN201610191652A CN105675501B CN 105675501 B CN105675501 B CN 105675501B CN 201610191652 A CN201610191652 A CN 201610191652A CN 105675501 B CN105675501 B CN 105675501B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
- G01N2021/1725—Modulation of properties by light, e.g. photoreflectance
Abstract
The present invention relates to a kind of fluid composition analysis instrument and its detection channels method for arranging, it includes a host computer, a control system, a light source module, an optic probe and several detectors, wherein, optic probe includes several detection channels, and detection channels and detector correspond；Host computer is instructed for user's input control, and control instruction is sent to control system, control system receives control instruction and light source module is driven to shine, issued light is sent to fluid to be measured surface by light source module through optic probe, light occurs to reflect and is sent to detector through each detection channels on fluid to be measured surface, the reflective light intensity signal detected is sent to host computer by detector by control system, host computer compares the light intensity value that each detector detects and java standard library, and then determines the component and ratio of fluid to be measured.The present invention can quickly determine each component proportion in fluid in real time.
Description
Technical field
The present invention relates to Exploration of Oil And Gas and acquisition field, more particularly to a kind of fluid composition analysis instrument and its detection
Passage method for arranging.
Background technology
During oil-gas exploration and development is carried out, low-layer tester device needs to measure the various parameters of downhole fluid, such as
Fluid flow rate, fluid components etc., and according to the optimization of measurement parameter realization fluid sample collection procedure, wherein, measure fluid components
Determine the oil-gas ratio parameter in fluid, and oil-gas ratio parameter definition in a period of time in fluid oil, the phase of water and gas
Comparative example.At present, generally by sampled measurements oil-gas ratio parameter, this kind of measurement method can not only realize fast speed real-time measurement,
And measurement period is long, and measurement is cumbersome.
The content of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of fluid composition analysis instrument and its detection channels arrangement sides
Method can quickly determine each component proportion in fluid in real time.
To realize above-mentioned technical purpose, the present invention takes following technical scheme：A kind of fluid composition analysis instrument, it includes one
Host computer, a control system, a light source module, an optic probe and several detectors, wherein, the optic probe includes several
Detection channels, and the detection channels and detector correspond；The host computer is instructed for user's input control, and will control
Instruction is sent to the control system, and the control system receives control instruction and the light source module is driven to shine, the light
Issued light is sent to fluid to be measured surface by source module through the optic probe, and light occurs to reflect and pass through on fluid to be measured surface
Each detection channels are sent to the detector, and the detector sends out the reflective light intensity signal detected by the control system
The host computer is sent to, the host computer compares the light intensity value that each detector detects with java standard library, and then really
Determine the component and ratio of fluid to be measured.
One modulation module, a digital lock-in amplifier and light intensity normalization module are set in the control system；It is described
Modulation module generates modulated signal after receiving the control instruction of the host computer, and modulated signal is sent to light source driving electricity
Road, the light source driving circuit receive modulated signal and the light source module are driven to shine, and the light source module issued light is believed by force
It number is monitored by a light intensity detector, the light intensity signal that the light intensity detector is monitored is sent to the digital servo-control and puts
Big device, the digital lock-in amplifier receives light intensity signal, while receives the reflective light intensity signal that each detector detects,
The digital lock-in amplifier is used as using the signal identical with the modulated signal of the modulation module with reference to signal, to the light
Strong detector monitors to light intensity signal and the reflective light intensity signal that detects of each detector carry out phase demodulation after send
Module is normalized to the light intensity, the light intensity normalization module carries out the reflective light intensity signal that each detector detects
The host computer is sent to after normalization.
The light source module includes a light source, a fiber coupler and a multimode fibre；The light that the light source will be sent
It passes sequentially through the fiber coupler and multimode fibre is sent to the optic probe.
The optic probe includes a sapphire prism, a gland, a polarizer and an optic fibre end, wherein, the indigo plant
Symmetrical one plane of incidence of cutting in both ends and a test surface at the top of jewel prism；The sapphire prism top center is arranged at intervals two peaces
Hole is filled, the shape of the gland is corresponding with the sapphire prism top shape；With the corresponding pressure of the test surface
Lid bottom end is horizontally arranged at interval each detection channels, the gland bottom centre corresponding with the position of mounting hole
Blind hole is set, is fixedly connected between the blind hole and mounting hole by screw rod；It is another with the corresponding gland bottom of the plane of incidence
One end sets a through hole, and be sticked on the plane of incidence the fixed polarizer, the vertical polarization in one end of the optic fibre end
Piece, the other end of the optic fibre end connect the multimode fibre by the through hole.
Each detector detects reflective light intensity signal by reception optical fiber, and the reflective light intensity signal detected is turned
A detector amplifying circuit is sent to after forming current signal, each current signal is changed into voltage by the detector amplifying circuit
Signal, and it is sent to the control system after amplifying to each voltage signal into line amplitude.
The host computer is located on well, and the control system, light source module, optic probe and detector are located at underground, and
The control system, light source module and detector are arranged in an insulation construction.
The production method of the standard, comprises the following steps：1) obtained by measurement when fluid is pure air through each spy
Survey channel detection to light intensity and the light intensity that monitors of light intensity detector, using the light intensity that light intensity detector monitors as etalon optical power
The light intensity detected to each detection channels is normalized, and obtains the java standard library of pure air；2) it is pure to obtain fluid by measurement
The light intensity that the light intensity and light intensity detector detected when oily by each detection channels monitors, the light monitored with light intensity detector
It is strong to be normalized for the light intensity that etalon optical power detects each detection channels, obtain the java standard library of pure oil；3) by measuring
The light intensity that the light intensity and light intensity detector detected to fluid when gentle for the oil of different proportion by each detection channels monitors,
It is normalized by the light intensity that etalon optical power detects each detection channels of the light intensity that light intensity detector monitors, obtains difference
The oily gentle java standard library of ratio；4) light intensity detected when fluid is pure water by each detection channels and light are obtained by measurement
The light intensity that strong detector monitors arrive, the light that each detection channels are detected as etalon optical power using the light intensity that light intensity detector monitors
It is normalized by force, obtains the java standard library of pure water；5) fluid is obtained for the oil of different proportion and during water by each spy by measurement
Survey channel detection to light intensity and the light intensity that monitors of light intensity detector, using the light intensity that light intensity detector monitors as etalon optical power
The light intensity detected to each detection channels is normalized, and obtains the oil of different proportion and the java standard library of water；6) meter is passed through respectively
When calculation obtains oil gentle and different proportion oil of the fluid for different proportion with water, being visited by each detection channels after normalization
The light intensity measured compared with fluid for pure oil when, by the increment for the light intensity that each detection channels detect, and by all light intensity
Increment deposit java standard library in.
A kind of method for arranging of the detection channels of fluid composition analysis instrument comprises the following steps：1) determine respectively empty gas and water,
The refractive index of oil and sapphire prism, and reflectivity when interface to be measured is prism/air, prism/water and prism/oil is drawn respectively
With incidence angle change curve；2) it is prism/air according to the interface to be measured drawn, prism/water and reflectivity during prism/oil
With incidence angle change curve respectively to should determine that interface to be measured is all-trans for prism/air, prism/water and when prism/oil
The critical angle penetrated, between the critical angle being totally reflected with prism/air to prism/water and prism/water is given birth to prism/fry dried food ingredients
The corresponding detection channels that optic probe is set between the critical angle of total reflection.
The present invention has the following advantages due to taking above technical scheme：1st, the present invention is based on fluid by different component
Different proportion composition when, the reflective light intensity signal detected by each detection channels is different, and the reflective light intensity detected is believed
It number is compared with java standard library, and then determines each component and its ratio in fluid, avoid the troublesome operation of sampling and measuring.2、
The present invention carries out phase demodulation by the way that modulation module is set to send modulated signal, and by digital lock-in amplifier, therefore not only
Interference of the noise to detectable signal can be reduced, and the lock-in amplifier that individual devices can be avoided to form causes system structure
Complicated and stability declines.3rd, optic probe of the invention can be adapted for underground high temperature due to using sapphire prism
Hyperbaric environment；Shape of the present invention due to specifically setting optic probe convenient for sealing, further adapts to underground high temperature and pressure
Environment.4th, the present invention can be adapted for well since control system, light source module and detector are arranged in insulation construction
Lower high temperature and high pressure environment improves service life of structure.5th, the present invention according to interface to be measured be different material when reflectivity with incidence
Angle change curve determines the arrangement of each detection channels, therefore can realize the component identification of multicomponent fluid.6th, originally
Invention effectively increases the utilization ratio of energy of light source due to setting fiber coupler.7th, the present invention is polarized due to setting
Piece, therefore can effectively control the polarization state of optic fibre end injection light.8th, the present invention is due to setting light intensity detector and light intensity to return
One changes module, therefore can effectively eliminate light source shake so caused measurement error, ensures the accuracy of measurement result.This hair
Bright design structure is simple, easy to operate, and measurement result real-time and accuracy are high, therefore can be widely applied to oil field well
The technical fields such as the measurement of fluid oil-gas ratio, drilling fluid pollution detection carry out fluid live component measurement in underground, are oil field
Production decision provides foundation.
Description of the drawings
Fig. 1 is the functional block diagram of the fluid composition analysis instrument of the present invention；
Fig. 2 is the structure diagram of the fluid composition analysis instrument of the present invention；
Fig. 3 is the dimensional structure diagram of the sapphire prism of the present invention；
Fig. 4 is the main structure diagram of the sapphire prism of the present invention；
Fig. 5 is the left view structural representation of the sapphire prism of the present invention；
Fig. 6 is the overlooking the structure diagram of the sapphire prism of the present invention；
Fig. 7 is the dimensional structure diagram of the gland of the present invention；
Fig. 8 is the present invention looks up structural representation of Fig. 7；
Fig. 9 is the main structure diagram of the gland of the present invention；
Figure 10 is the right side structural representation of the gland of the present invention；
Figure 11 is the A-A schematic cross-sectional views of Figure 10；
Figure 12 is the schematic cross-sectional view of Figure 10；
Figure 13 be the interface to be measured of the present invention for prism/air, prism/water and during prism/oil reflectivity with incidence angle
Change curve, wherein, abscissa represents incidence angle, unit degree of being, ordinate represents reflectivity.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Fig. 1~2, fluid composition analysis instrument of the invention includes a host computer 1, a control system 2, a light source die
Block 3, an optic probe 4 and several detectors 5, wherein, optic probe 4 includes several detection channels 41, the tool of detection channels 41
Body number is determined according to measurement the required accuracy and speed, is not limited herein, and detection channels 41 and detector 5 correspond,
In the present embodiment, detection channels 41 set seven, and corresponding detector 5 sets seven；
Host computer 1 is sent to control system 2 for the instruction of user's input control, and by control instruction, and control system 2 receives control
System instructs and light source module 3 is driven to shine, and issued light is sent to 6 table of fluid to be measured by light source module 3 through the optic probe 4
Face, light occur to reflect and are sent to detector 5 through each detection channels 41 on 6 surface of fluid to be measured, and detector 5 is anti-by what is detected
It penetrates light intensity signal and host computer 1, the light intensity value and java standard library that host computer 1 detects each detector 5 is sent to by control system 4
It is compared, and then determines the component and ratio of fluid to be measured.
In a preferred embodiment, host computer 1 carries out two-way communication by serial communication apparatus 7 and control system 2,
And use RS485 RS232 communication protocols.
In a preferred embodiment, control system 2 may be employed FPGA or DSP and form；One is set in control system 2
Modulation module, a digital lock-in amplifier and light intensity normalization module；Modulation module produces after receiving the control instruction of host computer 1
Raw modulated signal, and modulated signal is sent to a light source driving circuit 21, light source driving circuit 21 receives modulated signal driving
Light source module 3 shine, 3 issued light strong signal of light source module is monitored by a light intensity detector 22, light intensity detector 22 by its
The light intensity signal monitored is sent to digital lock-in amplifier, and digital lock-in amplifier receives light intensity signal, while receives each spy
The reflective light intensity signal that device 5 detects is surveyed, digital lock-in amplifier is used as using the signal identical with modulated signal with reference to signal,
The reflective light intensity signal that the light intensity signal and each detector 5 monitored to light intensity detector 22 detects is sent out after carrying out phase demodulation
Light intensity normalization module is sent to, light intensity normalizes module using the light intensity signal that light intensity detector 22 monitors as etalon optical power pair
The reflective light intensity signal that each detector 5 detects is sent to host computer 1 after being normalized.
In a preferred embodiment, light source module 3 includes a light source 31, a fiber coupler 32 and a multimode fibre
8；Light source 31 shines under the driving of light source driving circuit 21, light source 31 shines coupled by fiber coupler 32 after it is logical
It crosses multimode fibre 8 and is sent to optic probe 4, wherein, laser or LED may be employed in light source 31, and the wavelength of light source 31 is optional near
Infrared band or visible light wave range.
In a preferred embodiment, as shown in Fig. 3~12, optic probe 4 includes a sapphire prism 42, a gland
43rd, a polarizer 44 and a SMA905 optic fibre ends 45, wherein, sapphire prism 42 be a cylindrical structure, sapphire prism
Symmetrical one plane of incidence 421 of cutting in 42 tops both ends and a test surface 422；The top center on the top of sapphire prism 42 is arranged at intervals
Two mounting holes 423, the shape of gland 43 is corresponding with 43 top shape of sapphire prism, with ensure gland 43 can and sapphire
42 top of prism mutually fastens；It is horizontally arranged at interval each detection channels 41 with 422 corresponding 43 bottom end of gland of test surface,
Corresponding with 423 position of mounting hole, 43 bottom centre of gland sets blind hole 431, passes through spiral shell between blind hole 431 and mounting hole 423
Bar is fixedly connected, so that gland 43 and sapphire prism 42 are connected to one, with 421 corresponding gland 43 of the plane of incidence
The bottom other end sets a through hole, and a mounting base 432 is fixedly installed on the outside of through hole, and be sticked fixed polarizer 44 on the plane of incidence 421,
One end vertical polarizer 44 of SMA905 optic fibre ends 45, the other end of SMA905 optic fibre ends 45 sequentially pass through through hole and installation
Seat 432 connects multimode fibre 8.
In a preferred embodiment, each detector 5 detects reflective light intensity signal by reception optical fiber 51, and will visit
The reflective light intensity signal measured is sent to a detector amplifying circuit 52 after changing into current signal, and detector amplifying circuit 52 will
Each current signal changes into voltage signal, and is sent to control system 2 after amplifying to each voltage signal into line amplitude.
In a preferred embodiment, host computer 1 is located on well, control system 2, light source module 3,4 and of optic probe
Detector 5 is located at underground, and control system 2, light source module 3 and detector 4 are arranged in an insulation construction 9.
The method for arranging of the detection channels of the fluid composition analysis instrument of the present invention, comprises the following steps：
1st, the refractive index of empty gas and water, oil and sapphire prism is determined respectively, and draws interface to be measured respectively as prism/sky
Reflectivity is with incidence angle change curve when gas, prism/water and prism/oil, as shown in figure 13；
2nd, it is prism/air according to the interface to be measured drawn, prism/water and reflectivity becomes with incidence angle during prism/oil
It is respectively the critical angle being totally reflected when prism/air, prism/water and prism/oil to should determine that interface to be measured to change graph,
Between the critical angle being totally reflected with prism/air to prism/water and prism/water facing to what prism/fry dried food ingredients life was totally reflected
Detection channels between boundary angle on corresponding optic probe are set, for ease of description, are occurred with prism/air to prism/water
The corresponding detection channels for setting optic probe are known as first group of detection channels between the critical angle of total reflection, are arrived with prism/water
The detection channels set between the critical angle of prism/fry dried food ingredients life total reflection on corresponding optic probe are known as second group of detection and lead to
Road.
The production method of the java standard library of the fluid composition analysis instrument of the present invention, comprises the following steps：
1st, fluid is obtained by measurement to supervise for the light intensity and light intensity detector detected by each detection channels during pure air
The light intensity measured carries out normalizing using the light intensity that light intensity detector monitors as etalon optical power to the light intensity that each detection channels detect
Change, obtain the java standard library of pure air, wherein, the calculation formula that the light intensity detected by each detection channels is normalized is such as
Under：
In formula,Represent the light intensity value after normalization when fluid is pure air；Represent that i-th of detection channels detects
Light intensity, in the present embodiment, i=1,2...7；v0Represent the light intensity that light intensity detector monitors；
2nd, fluid is obtained by measurement to monitor for the light intensity and light intensity detector detected by each detection channels during pure oil
The light intensity arrived carries out normalizing using the light intensity that light intensity detector monitors as etalon optical power to the light intensity that each detection channels detect
Change, obtain the java standard library of pure oil, wherein, the calculation formula that the light intensity detected by each detection channels is normalized is such as
Under：
In formula,Represent the light intensity value after normalization when fluid is pure oil；Represent what i-th of detection channels detected
Light intensity；v1Represent the light intensity that light intensity detector monitors；
3rd, by measurement obtain fluid for different proportion (proportional spacing value be generally 5%) between different proportion oil with
The light intensity that the light intensity and light intensity detector detected during gas by each detection channels monitors, the light monitored with light intensity detector
It is strong to be normalized for the light intensity that etalon optical power detects each detection channels, the gentle java standard library of the oil of different proportion is obtained,
Wherein, the calculation formula light intensity detected by each detection channels being normalized is as follows：
In formula,Represent the light intensity value after normalization when fluid is gentle for the oil of different proportion；Represent i-th of spy
Survey the light intensity that channel detection arrives；vstd1Represent the light intensity that light intensity detector monitors；
4th, fluid is obtained by measurement to monitor for the light intensity and light intensity detector detected by each detection channels during pure water
The light intensity arrived carries out normalizing using the light intensity that light intensity detector monitors as etalon optical power to the light intensity that each detection channels detect
Change, obtain the java standard library of pure water, wherein, the calculation formula that the light intensity detected by each detection channels is normalized is such as
Under：
In formula,Represent the light intensity value after normalization when fluid is pure water；Represent what i-th of detection channels detected
Light intensity；v2Represent the light intensity that light intensity detector monitors；
The light intensity and light detected when the 5, obtaining the oil and water that fluid is different proportion by measurement by each detection channels
The light intensity that strong detector monitors arrive, the light that each detection channels are detected as etalon optical power using the light intensity that light intensity detector monitors
It is normalized by force, obtains the oil of different proportion and the java standard library of water, wherein, the light intensity detected to each detection channels is returned
One calculation formula changed is as follows：
In formula,Represent oil of the fluid for different proportion and the light intensity value after normalization during water；It represents i-th
The light intensity that detection channels detect；vstd2Represent the light intensity that light intensity detector monitors；
When gentle and different proportion the oil of oil and water that fluid is different proportion the 6, being obtained by calculation respectively, normalization
Afterwards by the light intensity that each detection channels detect compared with fluid for pure oil when, the light intensity that is detected by each detection channels
Increment, and the increment of all light intensity is stored in java standard library, wherein, the calculation formula of light intensity increment is as follows：
In formula,When representing that fluid is gentle for the oil of different proportion, the light intensity increment of java standard library is stored in；
When fluid is the oil and water of different proportion, the calculation formula of light intensity increment is as follows：
In formula,When representing oil of the fluid for different proportion with water, the light intensity increment of java standard library is stored in.
Include herein below during the use of the fluid composition analysis instrument of the present invention：
1st, optic probe 4 is inserted into the exploration hole 61 set on a downhole fluid pipeline, and causes optic probe 4
Bottom surface is contacted with 6 surface of fluid to be measured；
2nd, control instruction is sent to control system 2 by host computer 1, and control system 2 receives control instruction and drives light source die
Block 3 shines, and issued light is passed sequentially through multimode fibre 8, SMA905 fiber ports 45 to polarizer 44, polarization by light source module 3
45 emergent light of SMA905 fiber ports is converted to the polarised light of divergent state by piece 44 so that incident light has different incidence angles
Sapphire prism 42 is injected afterwards, and illuminates sapphire prism 42 and an elliptical region at 6 surface interface of fluid to be measured,
And it is reflected in the region；
3rd, each detector 5 detects reflective light intensity signal by corresponding detection channels 41 and is by controlling after being handled
System 2 is sent to host computer 1, and host computer 1 handles each reflective light intensity signal, and obtains (a period of time a period of time respectively
Typically 30S~60S) in the light intensity that detects of each detector 5 compared with fluid for pure oil when, detected by each detection channels
Light intensity increment average value, by by the light intensity that first group of detection channels detects compared with fluid for it is pure oil when, by each
The average value for the light intensity increment that detection channels detect is compared with fluid with the light intensity detected by second group of detection channels
During pure oil, the average value of the light intensity increment detected by each detection channels is compared, if comparing result is without apparent poor
Different (notable difference refers to that comparing result error is more than oily gentle or oily and water proportional spacing value in java standard library), illustrate fluid
For oil and air composition, Hollow fluid gas proportion need to be only calculated at this time, fluid can be extrapolated by air proportion
Middle oil proportion, wherein, the calculating process of Hollow fluid gas proportion comprises the following steps：
1) the reflective light intensity signal detected respectively to first group of detection channels and second group of detection channels is normalized,
Its calculation formula is as follows：
In formula,Represent the light intensity value after normalization；Represent that i-th (i=1,2 ... 7) a detection channels detect
Reflective light intensity signal；vmea1Represent the light intensity that light intensity detector monitors；
2) calculate normalization after each detection channels detection reflective light intensity signal compared with fluid for it is pure oil when, by each
The increment for the light intensity that detection channels detect, calculation formula are as follows：
In formula,Represent the increment of light intensity；
3) increment of light intensity in a period of time is calculatedAverage value, and be different proportion by average value and fluid
Oil it is gentle when, be stored in the light intensity increment of java standard libraryIt is compared, determines to flow using look-up table cooperation linear interpolation method
Air proportion in body；
4) subtract Hollow fluid gas proportion with a hundred percent and obtain oily proportion in fluid；
If comparing result has notable difference, illustrate that fluid is made of empty gas and water and oil, need to only calculate Hollow fluid at this time
Gas and water proportion can extrapolate oily proportion in fluid by air and water proportion, wherein, Hollow fluid gas
The calculating process of proportion and above-mentioned steps are essentially identical, uniquely the difference is that, only use first group of detection channels and detect
Reflective light intensity signal calculate the light intensity value after corresponding normalization, therefore details are not described herein；
The calculating process of water proportion, specifically includes following steps in fluid：
1) the reflective light intensity signal that second group of detection channels detects is normalized, calculation formula is as follows：
In formula,Represent the light intensity value after normalization；Represent what i-th (i=6,7) a detection channels detected
Light intensity；vmea2Represent the light intensity that light intensity detector monitors；
2) calculate normalization after second group of detection channels detection reflective light intensity signal compared with fluid for it is pure oil when, lead to
The increment for the light intensity that each detection channels detect is crossed, calculation formula is as follows：
In formula,Represent light intensity increment；
3) light intensity increment in a period of time is calculatedAverage value, and be different proportion by average value and fluid
When oil and water, the light intensity increment of java standard library is stored inIt is compared, fluid is determined using look-up table cooperation linear interpolation method
Middle water proportion；
4) subtract Hollow fluid gas with a hundred percent and water proportion obtains oily proportion in fluid.
Above-described embodiment is merely to illustrate the present invention, wherein the structure of each component, connection mode and manufacture craft etc. are all
It can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not exclude
Outside protection scope of the present invention.
Claims (7)
1. a kind of fluid composition analysis instrument, it is characterised in that：It includes a host computer, a control system, a light source module, a light
Probe and several detectors are learned, wherein, the optic probe includes several detection channels, and the detection channels and detector one
One corresponds to；
The host computer is instructed for user's input control, and control instruction is sent to the control system, the control system
It receives control instruction and the light source module is driven to shine, issued light is sent to by the light source module through the optic probe
Fluid to be measured surface, light occur to reflect and are sent to the detector, the detection through each detection channels on fluid to be measured surface
The reflective light intensity signal detected is sent to the host computer by device by the control system, and the host computer is by each spy
It surveys the light intensity value that device detects to be compared with java standard library, and then determines the component and ratio of fluid to be measured；
Wherein, the production method of the java standard library, comprises the following steps：
1) fluid is obtained by measurement to monitor for the light intensity and light intensity detector detected by each detection channels during pure air
Light intensity, be normalized by the light intensity that etalon optical power detects each detection channels of the light intensity that light intensity detector monitors,
Obtain the java standard library of pure air；
2) light intensity and light intensity detector for obtaining fluid by measurement to be detected during pure oil by each detection channels monitor
Light intensity is normalized by the light intensity that etalon optical power detects each detection channels of the light intensity that light intensity detector monitors, obtains
To the java standard library of pure oil；
3) light intensity and light intensity for obtaining detecting by each detection channels when fluid is gentle for the oil of different proportion by measurement are visited
Survey the light intensity that monitors of device, using the light intensity that light intensity detector monitors as etalon optical power to the light intensity that each detection channels detect into
Row normalization obtains the gentle java standard library of the oil of different proportion；
4) light intensity and light intensity detector for obtaining fluid by measurement to be detected during pure water by each detection channels monitor
Light intensity is normalized by the light intensity that etalon optical power detects each detection channels of the light intensity that light intensity detector monitors, obtains
To the java standard library of pure water；
5) fluid is obtained by measurement to visit with the light intensity and light intensity detected by each detection channels during water for the oil of different proportion
Survey the light intensity that monitors of device, using the light intensity that light intensity detector monitors as etalon optical power to the light intensity that each detection channels detect into
Row normalization obtains the oil of different proportion and the java standard library of water；
6) when oil gentle and different proportion oil of the fluid for different proportion being obtained by calculation respectively with water, after normalization
By the light intensity that each detection channels detect compared with fluid for it is pure oil when, pass through the increasing for the light intensity that each detection channels detect
Amount, and will be in the increment deposit java standard library of all light intensity.
2. a kind of fluid composition analysis instrument as described in claim 1, it is characterised in that：One modulation mould is set in the control system
Block, a digital lock-in amplifier and light intensity normalization module；After the modulation module receives the control instruction of the host computer
Modulated signal is generated, and modulated signal is sent to a light source driving circuit, the light source driving circuit receives modulated signal and drives
It moves the light source module to shine, the light source module issued light strong signal is monitored by a light intensity detector, and the light intensity is visited
It surveys the light intensity signal that device is monitored and is sent to the digital lock-in amplifier, the digital lock-in amplifier receives light intensity letter
Number, while the reflective light intensity signal that each detector detects is received, the digital lock-in amplifier uses and the modulation
The identical signal of the modulated signal of module is used as with reference to signal, the light intensity signal monitored to the light intensity detector and each described
The reflective light intensity signal that detector detects is sent to the light intensity normalization module, the light intensity normalizing after carrying out phase demodulation
Change after the reflective light intensity signal that module detects each detector is normalized and be sent to the host computer.
3. a kind of fluid composition analysis instrument as claimed in claim 2, it is characterised in that：The light source module includes a light source, one
Fiber coupler and a multimode fibre；The light sent is passed sequentially through the light source fiber coupler and multimode fibre is sent out
It is sent to the optic probe.
4. a kind of fluid composition analysis instrument as claimed in claim 2, it is characterised in that：The optic probe includes a sapphire rib
Mirror, a gland, a polarizer and an optic fibre end, wherein, at the top of the sapphire prism symmetrical one plane of incidence of cutting in both ends and
One test surface；The sapphire prism top center is arranged at intervals two mounting holes, the shape of the gland and the sapphire rib
Mirror top shape is corresponding；It is logical with each detection that is horizontally arranged at interval of the corresponding gland bottom end of the test surface
Road, corresponding with the position of mounting hole, the gland bottom centre sets blind hole, passes through spiral shell between the blind hole and mounting hole
Bar is fixedly connected；The gland bottom other end corresponding with the plane of incidence sets a through hole, and be sticked fixation on the plane of incidence
The polarizer, vertically the polarizer, the other end of the optic fibre end pass through the through hole for one end of the optic fibre end
Connect multimode fibre.
5. a kind of fluid composition analysis instrument as claimed in claim 1 or 2 or 3 or 4, it is characterised in that：Each detector is logical
Reception optical fiber detection reflective light intensity signal is crossed, and the reflective light intensity signal detected is changed into after current signal and is sent to a spy
Device amplifying circuit is surveyed, each current signal is changed into voltage signal by the detector amplifying circuit, and each voltage signal is carried out
The control system is sent to after amplitude amplification.
6. a kind of fluid composition analysis instrument as claimed in claim 1 or 2 or 3 or 4, it is characterised in that：The host computer is located at well
On, the control system, light source module, optic probe and detector are located at underground, and the control system, light source module and spy
Device is surveyed to be arranged in an insulation construction.
7. a kind of method for arranging of the detection channels of the fluid composition analysis instrument as described in claim 1~6 any one, feature
It is, comprises the following steps：
1) refractive index of empty gas and water, oil and sapphire prism is determined respectively, and draws interface to be measured respectively as prism/air, rib
Reflectivity is with incidence angle change curve when mirror/water and prism/oil；
2) be prism/air according to the interface to be measured drawn, prism/water and during prism/oil reflectivity with incidence angle variation song
Line chart is respectively the critical angle being totally reflected when prism/air, prism/water and prism/oil to should determine that interface to be measured, with rib
Between the critical angle that mirror/air is totally reflected to prism/water and prism/water gives birth to the critical angle of total reflection to prism/fry dried food ingredients
Between it is corresponding set optic probe detection channels.
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| CN108414480B (en) * | 2018-01-26 | 2023-03-24 | 中国海洋石油集团有限公司 | Crude oil fluorescence measuring device and method |
| CN108489899A (en) * | 2018-02-13 | 2018-09-04 | 中国海洋石油集团有限公司 | A kind of fluid reflected light measurement device |
| CN109632719B (en) * | 2018-11-28 | 2021-07-06 | 中国海洋石油集团有限公司 | Method and device for detecting gas in fluid |
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| CN1549920A (en) * | 2000-10-10 | 2004-11-24 | ��ķ�ɷ�����˾ | Methods and apparatus for downhole fluids analysis |
| EP1903329A1 (en) * | 2006-09-20 | 2008-03-26 | Services Pétroliers Schlumberger | An apparatus and method for optically determining the presence of carbone dioxide |
| CN100487427C (en) * | 2003-03-27 | 2009-05-13 | 施卢默格海外有限公司 | Determining fluid properties from fluid analyzer |
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| US20090066959A1 (en) * | 2007-09-07 | 2009-03-12 | Baker Hughes Incorporated | Apparatus and Method for Estimating a Property of a Fluid in a Wellbore Using Photonic Crystals |
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