CN104897240B - A kind of measuring method of oil-water interfaces - Google Patents
A kind of measuring method of oil-water interfaces Download PDFInfo
- Publication number
- CN104897240B CN104897240B CN201510080032.1A CN201510080032A CN104897240B CN 104897240 B CN104897240 B CN 104897240B CN 201510080032 A CN201510080032 A CN 201510080032A CN 104897240 B CN104897240 B CN 104897240B
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- oil
- antenna
- poliarizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A kind of measuring method of oil-water interfaces, by poliarizing antenna to being put into medium to be measured, make poliarizing antenna to vertically being moved in medium to be measured, poliarizing antenna is recorded to the reception signal amplitude at diverse location in moving process, absolute value X (n) of the reception signal amplitude of each opening position with the absolute value R (n) of signal amplitude reference value difference in crude oil and with submarine signal amplitude reference value difference value is calculated, R (n) is found out and is less than CH×QHWhen n value, form set R, find out X (n) and be less than CL×QLWhen n value, form set X, find out the minimum value in set R and the maximum in set X, calculating H1=l × Xmax, H2=l × Rmin, it is water layer in the range of 0~H1, is oil mixing with water layer in the range of H1~H2, is oil reservoir in the range of H2~H.The present invention is placed using a pair of polarised direction identical poliarizing antenna parallel intervals, can be received good radiation signal, be avoided the influence of the diffraction due to signal, Multipath Transmission to reception signal.
Description
Technical field
The invention belongs to automatic measurement technology field, more particularly to a kind of method for measuring oil-water interfaces, it is mainly used in
The measurement of oil-water interfaces in crude oil storage tank.
Background technology
During oil extraction, the particularly oilfield exploitation later stage is obtained, it is necessary to inject substantial amounts of water to underground to improve pressure
Take oil.Just contain substantial amounts of water and silt in the crude oil that so exploitation obtains.In the settling tank of high temperature (80 DEG C), due to weight
Power effect profit layering.The position of oil-water interfaces excludes water as needing to solve the problems, such as in time after how being layered.Currently
The measurement of oil water surface is broadly divided into contact type measurement and non-contact measurement.
Contact type measurement is mainly using float type liquid level measuring appliance, capacitance type liquid level measuring instrument, differential pressure type level measuring instrument
Deng.Wherein, float type liquid level measuring appliance is by buoys float on the liquid of measurement, and liquid level change is converted into corresponding electricity
Signal；But the easy liquid body fluctuation of float, the influence of oil adhesive, the influence of mechanical movable member itself in measurement process
Problem can be brought to measurement, cause deviation larger.Capacitance type liquid level measuring instrument immerses capacitor in oil tank, measures capacitor
Capacitance judges the position of interface；Because the surroundings for influenceing electric capacity are more, this method is not easy accurate measurement profit
Emulsion layer between interface.Differential pressure type liquid level measuring instrument is to immerse pressure difference transmitter in oil tank, passes through the pressure of instrument measurement liquid level
Power is poor, is changed according to the pressure differential that the change of fluid density can cause to detect, so as to measure liquid level；But due to tank bottom impulse
Pipeline is often deposited thing, viscous medium blocks, and influences pressure transmission, is particularly blocked in cold season more serious, it is necessary to fixed
Phase blowdown so that maintenance is big.
Non-contact measurement is mainly using Ultrasonic Liquid Level Indicator, microwave fluid level measuring instrument etc..Ultrasonic liquid level measuring
Instrument be according to pulse liquid level produce echo system work, using the reflection wave signal of reception obtain from testee surface away from
From, can be only applied to fuel head measurement.Microwave fluid level measuring instrument has two ways, and one kind is radar type level gauging, another
Kind is by microwave generation and reception device, calculates the parameters such as microwave signal transmission coefficient, reflectance factor and judges oil-water interfaces；Its
Advantage is that the effect by some factors such as Media density, pressure, environment temperature and humidity is smaller.
Authorization Notice No. is that CN 2246795Y Chinese utility model patents disclose a kind of big tank oil-water interfaces measurement dress
Put, the measurement apparatus is received using coil radiation high-frequency signal, and the receiving coil by being placed in same metal can, by microampere meter
Show the size of reception signal.This device uses contact type measurement, the reflected signal of electromagnetic wave is received with receiving coil, due to electricity
The propagation characteristic of magnetic wave, receiving coil can receive the electromagnetic signal after substantial amounts of diffraction, multipath reflection, additionally, due to coil spoke
The directionality of radio magnetic wave is indefinite, thus increases the generation scope of interference signal so that the measurement accuracy of this method
Greatly reduce.And according to the characteristic of antenna, after transmitting coil or receiving coil contact with media such as oil, water, its characteristic hair
Raw greatly to change, this radiation and reception to high-frequency signal is extremely disadvantageous, can bring error to measurement result.
Number of patent application is that 201010550526 Chinese invention patent applications disclose a kind of crude oil storage tank oil-water interfaces survey
Device is measured, the device produces microwave signal using single-chip microcomputer control Microwave emission array, and signal is in oil reservoir, water layer, air layer etc.
Propagated in different medium, received by receiving unit after oil storage tank reflects, judged by comparing the power of reception signal amplitude
Transmitter unit present position simultaneously calculates oil water surface.The Chinese utility model patent of Patent No. 201320891190.1 is public
A kind of oil-water surface measuring instrument is opened, the measuring instrument is utilized using mobile electromagnetical transmitting receiving array transmission of electromagnetic signals
Same array received reflected signal.Foregoing two kinds of measurement apparatus do not consider antenna transmitting and the polarization characteristic received, have ignored micro-
The influence that ripple signal diffraction, the reflection of the interface of oil and gas, polarised direction are brought to reflected signal power to measurement accuracy, in order to measure
Precision is, it is necessary to establish matrix emissive unit so that apparatus structure is complicated, and the Stability and dependability to device, which is brought, greatly to be chosen
War so that later maintenance also becomes more difficult.And the cost for forming matrix emissive unit is higher, in economic benefit not
It is very good.
The content of the invention
It is an object of the invention to provide a kind of measurement accuracy height, it can avoid what microwave signal transmission impacted to reception
The method for measuring oil-water interfaces.
To achieve these goals, the present invention takes following technical solution：
A kind of measuring method of oil-water interfaces, comprises the following steps：
Step 1, by poliarizing antenna to being put into medium to be measured, one of poliarizing antenna is as transmitting antenna, separately
One poliarizing antenna is as reception antenna, and two poliarizing antenna polarised directions are identical and parallel interval is set；
Step 2, make poliarizing antenna to vertically being moved in medium to be measured, transmitting antenna radiates in moving process
Signal, reception antenna reception signal；
Step 3, record poliarizing antenna are to the reception signal amplitude at diverse location in moving process, the list of poliarizing antenna pair
It is H to mobile always distance, poliarizing antenna is l to mobile unit distance once, and n represents poliarizing antenna to location, n positions
The reception signal amplitude for putting place is Q (n), and the reception that poliarizing antenna can measure at N number of diverse location to a mobile stroke is believed
Number amplitude, N=H/l, n=1 ..., N；
Step 4, the reception signal amplitude Q (n) for calculating each opening position and signal amplitude reference value Q in crude oilHDifference
Absolute value R (n) and reception signal amplitude Q (n) and submarine signal amplitude reference value QLThe absolute value X (n) of difference：
R (n)=| Q (n)-QH|,
X (n)=| Q (n)-QL|；
Wherein, QHFor signal amplitude reference value, Q in crude oilLFor submarine signal amplitude reference value；
Step 5, find out R (n) and be less than CH×QHWhen n value, form set R, find out X (n) and be less than CL×QLWhen n take
Value, set X is formed, wherein, CHFor measurement error parameter, C in oilLFor measurement error parameter in water；
Step 6, find out minimum value R in set RminAnd the maximum X in set Xmax；
It is water layer in the range of 0~H if set R is empty set；It is oil in the range of 0~H if set X is empty set
Layer；
Step 7, calculate H1=l × Xmax, H2=l × Rmin, it is water layer in the range of 0~H1, is profit in the range of H1~H2
Mixed layer, it is oil reservoir in the range of H2~H.
The band bandwidth of the poliarizing antenna of the inventive method is 2GHz~3GHz.
The poliarizing antenna of the inventive method is microstrip antenna.
The poliarizing antenna for being used to launch of the inventive method is arranged in signal emission module, the polarization for being used to receive
Antenna is arranged in signal receiving module；The signal emission module includes sensor outer housing, is arranged at the sensor outer housing
Interior surface-mounted integrated circuit, the signal generating circuit being arranged on the surface-mounted integrated circuit, it is arranged on the sensor outer housing
Coaxial cable connector, poliarizing antenna are arranged on surface-mounted integrated circuit and are connected with the signal generating circuit, the coaxial electrical
Cable connector is connected with the signal generating circuit, to be powered to the signal generating circuit；The signal receiving module includes
Sensor outer housing, the surface-mounted integrated circuit being arranged in the sensor outer housing, the signal that is arranged on the surface-mounted integrated circuit connect
Receive circuit, the coaxial cable connector that is arranged on the sensor outer housing, poliarizing antenna be arranged on surface-mounted integrated circuit and with
The signal receiving circuit is connected, and the coaxial cable connector is connected with the signal receiving circuit, to be connect to the signal
Receive circuit power supply and outwards transmission data.
The poliarizing antenna of the inventive method includes radiation fin, microstrip feed line and ground strip, the radiation fin and the micro-strip
Feeder line is connected and is arranged on the upper surface of surface-mounted integrated circuit, and the ground strip is arranged on the lower surface of surface-mounted integrated circuit, institute
State signal generating circuit and signal receiving circuit respectively with the microstrip feed line to be connected, the ground strip ground connection.
The radiation fin of the inventive method is rectangle, and the center line of the ground strip and the center line of radiation fin are perpendicular.
The radiation fin, microstrip feed line and ground strip of the inventive method are the copper sheet of 0.1~0.2 millimeters thick, the signal hair
The distance between the poliarizing antenna of module and the poliarizing antenna of signal receiving module are penetrated as 15 centimetres.
The sensor outer housing of the inventive method is made up of plastic casing and metal shielding, and the poliarizing antenna is located at plastics
In shell, the signal generating circuit and signal receiving circuit are located in metal shielding respectively.
The signal generating circuit of the inventive method includes voltage controlled oscillator, voltage regulator circuit, ON-OFF control circuit, matching
Lattice network and transmitter module power circuit, the transmitter module power circuit are the voltage controlled oscillator, voltage regulator circuit
And ON-OFF control circuit power supply, the voltage controlled oscillator respectively with the voltage regulator circuit, ON-OFF control circuit and pair net
Network is connected, and the matching network circuit is connected with poliarizing antenna.
The signal receiving circuit of the inventive method includes matched filtering circuit, wave detector, amplifying circuit, output protection circuit
And receiving module power circuit, the receiving module power circuit are the wave detector, amplifying circuit, output protection circuit confession
Electricity, the matched filtering circuit, wave detector, amplifying circuit, output protection circuit are sequentially connected, the matched filter network and pole
Change antenna to be connected.
As known from the above, the present invention uses poliarizing antenna pair, and the polarised direction of two poliarizing antennas is identical and is spaced apart,
Antenna in crude oil to be measured to vertically moving, due to producing the poliarizing antenna of signal and the poliarizing antenna of reception signal
It is placed in petroleum tank, reception antenna can directly receive the signal from transmitting antenna, substantially reduce due to electromagnetic signal
It is rich penetrate, the reflection of the interface of oil and gas is to the influence that brings of measurement；And due to being poliarizing antenna, the electromagnetic signal side of aerial radiation
To single, this structure can also reduce electromagnetic signal diffraction and Multipath Transmission and receive the influence brought to signal, improve measurement
As a result the degree of accuracy.
Brief description of the drawings
Fig. 1 is the schematic diagram that oil-water interfaces are measured using the inventive method；
Fig. 2 is the flow chart of the inventive method；
Fig. 3 is the schematic diagram of signal emission module of the embodiment of the present invention；
Fig. 4 is Fig. 3 top view；
Fig. 5 a are the structural representation of poliarizing antenna；
Fig. 5 b are Fig. 5 a rearview；
Fig. 6 is the circuit block diagram of the signal generating circuit of signal emission module；
Fig. 7 is the schematic diagram of signal receiving module of the embodiment of the present invention；
Fig. 8 is the circuit block diagram of the signal receiving circuit of signal receiving module；
Fig. 9 a are the antenna pattern of antenna x-y axial planes of the embodiment of the present invention；
Fig. 9 b are the antenna pattern of antenna x-z axial planes of the embodiment of the present invention；
Fig. 9 c are the antenna pattern of antenna y-z axial planes of the embodiment of the present invention；
Figure 10 is the schematic diagram of different frequency electromagnetic wave attenuation measurement experiment；
Figure 11 a to 11k are that the electromagnetic wave attenuation of poliarizing antenna at different frequencies represents curve map；
Figure 12 is the schematic diagram that reception signal amplitude is measured using sensor of the embodiment of the present invention；
Schematic diagram when Figure 13 is the oil-water interfaces measurement that inventive sensor is applied to oil tank；
The scheme of installation of sensor when Figure 14 is measurement.
The embodiment of the present invention is described in more detail below in conjunction with accompanying drawing.
Embodiment
When electromagnetic wave is propagated in different medium, because the dielectric constant of medium is different, the decay of electromagnetic wave is different, electromagnetism
The attenuation of ripple is directly proportional to the dielectric constant of medium.The dielectric constant of crude oil is 2.3 or so, and the dielectric constant of water is up to
80, both dielectric constants are very big, therefore attenuation is changed significantly when electromagnetic wave is through different medium (oil, water), this
Invention judges which kind of medium electromagnetic wave passes through using the strong and weak change of sensor reception signal, and then judges oil-water interfaces.
Studied through inventor and find and verified by actual measurement, electromagnetic wave signal the declining in oil, water of different frequency
It is different to subtract, and the electromagnetic wave of some frequency bands cannot be distinguished by out oil-water interfaces substantially, and the electromagnetic wave of only specific frequency section is fitted
Together in the measurement of oil water surface, the attenuation characteristic of electromagnetic wave different frequency in oil-water media is not divided in the prior art
Analysis, is measured, measurement result will be affected if selected for inappropriate frequency range.
As shown in figure 1, the core concept of the inventive method is to utilize a pair of parallel poliarizing antenna being spaced apart, a pole
Change antenna as transmitting antenna, a poliarizing antenna is as reception antenna, by poliarizing antenna to being put into crude oil, transmitting antenna spoke
Signal is penetrated, signal is received after diectric attenuation by reception antenna, and the signal demodulator received is obtained into continuous square wave, passes through survey
The amplitude size for measuring square-wave signal judges media property.Measured using polarised direction identical poliarizing antenna, transmitting antenna
The electromagnetic signal direction of radiation is single, has good directionality, improves the penetration capacity of signal；Reception antenna can only simultaneously
The signal of specific direction is received, only has good receiving efficiency in particular directions, reduces reflection, the interface of oil and gas of electromagnetic signal
Diffraction, the influence that is brought to measurement accuracy of Multipath Transmission.
As shown in Fig. 2 the inventive method comprises the following steps：
Step 1, by poliarizing antenna to being put into medium to be measured, be such as put into the oil of oil tank, one of polarization day
Line is as transmitting antenna, and another poliarizing antenna is as reception antenna, identical and parallel of two poliarizing antenna polarised directions
Every setting；Poliarizing antenna is connected to rear end with process circuit and receiver；
Step 2, making poliarizing antenna, the poliarizing antenna of the present embodiment is to edge to vertically being moved in medium to be measured
The short transverse of petroleum tank up moves from bottom, transmitting antenna radiation signal in moving process, reception antenna reception signal；
Step 3, record poliarizing antenna are to the reception signal amplitude at diverse location in moving process, the list of poliarizing antenna pair
It is H to mobile always distance (stroke), poliarizing antenna is l to mobile unit distance once, and n represents poliarizing antenna to residing
Position, the reception signal amplitudes of n opening positions is Q (n), and poliarizing antenna is to a mobile stroke (at the top of such as being moved to from bottom
For a stroke) reception signal amplitude at N number of diverse location can be measured, N=H/l, n=1 ..., N, N are integer；
Step 4, the reception signal amplitude Q (n) for calculating each opening position and signal amplitude reference value Q in crude oilHDifference
Absolute value R (n) and reception signal amplitude Q (n) and submarine signal amplitude reference value QLThe absolute value X (n) of difference：
R (n)=| Q (n)-QH|,
X (n)=| Q (n)-QL|；
Wherein, QHFor signal amplitude reference value, Q in crude oilLFor submarine signal amplitude reference value；
Step 5, find out R (n) and be less than CH×QHWhen n value, form set R, wherein, CHFor measurement error parameter in oil,
The C of the present embodimentH=0.1；Find out X (n) and be less than CL×QLWhen n value, form set X, wherein, CLFor measurement error in water
Parameter, the C of the present embodimentL=0.2；
Step 6, find out minimum value R in set RminAnd the maximum X in set Xmax；
It is water layer in the range of 0~H if set R is empty set；It is oil in the range of 0~H if set X is empty set
Layer, now measurement terminate；
Step 7, calculate H1=l × Xmax, H2=l × Rmin, it is water layer in the range of 0~H1, is profit in the range of H1~H2
Mixed layer, it is oil reservoir in the range of H2~H.
It is measurable multiple in order to improve measurement accuracy, take H1, H2 average value.
Because temperature is different, the content of material is different in crude oil, and foam, impurity are disturbed in by crude oil, different times, no
The dielectric constant for the crude oil adopted with place is usually different, under the influence of medium composition, the flowing of medium, foam,
The signal amplitude that reception antenna receives might have certain fluctuation.Due to different oil field outputs petroleum media composition not
Together, reception signal amplitude and its fluctuation size are not known, signal amplitude reference value Q in crude oilH, submarine signal amplitude reference value QL、
Measurement error parameter C in oilH, measurement error parameter C in waterLAlso difference according to different situations, it is necessary to be adjusted.
Although its dielectric constant of different crude oil is also different, the medium composition of the oil of output is substantially in same oil field
Identical.Before oil-water interfaces measurement is carried out, signal amplitude reference value Q in crude oil can be first determinedHWith submarine signal amplitude reference
Value QLAnd measurement error parameter C in oilH, measurement error parameter C in waterL.Signal amplitude reference value Q in crude oilHWith submarine signal width
It is worth reference value QLGraphing method can be used to obtain, its step is：Profit state in oil storage tank is simulated, uses oscilloscope display polarization day
The signal that line receives, the size of reception signal amplitude at diverse location is recorded, draws height -- amplitude curve figure, and exclude larger
Error, because the attenuation of different medium acts on, paint highly -- amplitude curve figure is in integrally Z-shaped distribution, and poliarizing antenna exists
Gained signal amplitude can be distributed up and down along a determination value when being moved in oil, and the determination value is signal amplitude reference value in crude oil
QH, likewise, signal amplitude obtained by when poliarizing antenna moves in water can also be distributed along above and below a determination value, the determination value is
For submarine signal amplitude reference value QL.The inventive method by crude oil, submarine signal amplitude reference value oil can be avoided to be situated between
Influence of the amplitude fluctuations for the reception signal that matter composition different band is come to measurement accuracy.
Measurement error parameter C in oilH=Y/QH, measurement error parameter C in waterL=S/QL, wherein, Y is that letter is received in crude oil
The maximum magnitude of number amplitude fluctuations, i.e. limits of error scope in the oil of measurement process, S are reception signal amplitude fluctuations in water
Maximum magnitude, i.e. limits of error scope in the water of measurement process.It is maximum in the oil of measurement process for the present embodiment
Allowable error scope Y=0.1 × QH(i.e. reception signal amplitude is in 0.9QH-1.1QHBetween i.e. it is believed that reception signal opening position be
In oil), limits of error scope S=0.2 × Q in the oil of measurement processL(i.e. reception signal amplitude is in 0.8QL-1.2QLBetween
I.e. it is believed that reception signal opening position is in water).The maximum magnitude of the reception signal amplitude fluctuations of the present embodiment is in laboratory
Under the conditions of measurement obtain, limits of error scopes can be adjusted according to actual conditions in different environments, so that measurement
As a result it is more accurate.
When the inventive method measures, transmitting antenna is arranged in signal emission module A, reception antenna is positioned over signal
In receiving module B (Figure 12), signal emission module and signal receiving module pass through coaxial cable and the measurement apparatus phase of outside
Even, the signal received by measurement apparatus according to sensor is measured and subsequently calculated, so as to judge oil-water interfaces, measurement
Device can be oscillograph or Network Analyzer etc..According to antenna theory, when antenna is with physical contact between media, antenna performance will
It can change, be that this need to be that poliarizing antenna sets containment vessel.Meanwhile in order to shield radiating circuit signal interference, the shielding external world
Signal does not disturb reception signal, and the circuit part of signal emission module and signal receiving module all should be located in metal shielding.
With a specific embodiment, the present invention will be further described below.
As shown in Figure 3 and Figure 4, signal emission module includes plastic casing 1, metal shielding 2, surface-mounted integrated circuit 3, coaxial
Cable connector 4 and the poliarizing antenna and signal generating circuit for transmission signal being arranged on surface-mounted integrated circuit.Plastics
Shell 1 and the composition of metal shielding 2 accommodate the sensor outer housing of antenna and surface-mounted integrated circuit, and the sensor outer housing on the one hand can be with
Poliarizing antenna on surface-mounted integrated circuit is protected with oil water contact, not avoid producing corrosion impact antenna performance, on the other hand can be with
Shielding interference.Using being threadedly coupled between the plastic casing 1 of the present embodiment and metal shielding 2, sensor outer housing is cylinder,
Plastic casing 1 is made up of the bottom plate 1a and columnar side wall 1b of circle, and poliarizing antenna is located in plastic casing 1, plastic casing
Can be in order to the reception of signal for accommodating antenna, it is preferred to use weather resistant Fypro shell.Metal shielding 2 is by circle
Shielding case bottom plate 2a, columnar shielding shell side wall 2b and offer mounting hole (not shown) dividing plate 2c composition.Integrated electricity
Road plate 3 is through the mounting hole on dividing plate 2c, and a part (part for setting antenna) is in plastic casing 1, a part (sets electricity
The part on road) in metal shielding 2.It is equal on shielding case bottom plate 2a and dividing plate 2c for the ease of securing integrated circuit plate 3
There is the installation projection 2d for protruding from respective surface, surface-mounted integrated circuit 3 is fixed on the raised 2d of installation.The setting of surface-mounted integrated circuit 3
The part of signal generating circuit is located in metal shielding 2, and metal shielding 2 can be that circuits mask disturbs.
Poliarizing antenna is printed on surface-mounted integrated circuit 3, in combination with Fig. 5 a and Fig. 5 b, the poliarizing antenna of the present embodiment is micro-strip
Antenna, including the radiation fin 3-1 of rectangle, microstrip feed line 3-2 and ground strip 3-4, the distributing point of microstrip antenna (radiation fin) is micro-
The top of ribbon feeder, microstrip feed line are connected with signal generating circuit, and ground strip is connected ground connection with the earth terminal of signal generating circuit,
The center line of ground strip and the center line of radiation fin are perpendicular.Radiation fin 3-1 is connected with microstrip feed line 3-2 and is arranged at integrated electric
On the upper surface of road plate 3, ground strip 3-4 is arranged on the lower surface of surface-mounted integrated circuit 3, and ground strip is located at poliarizing antenna bottom.
The radiation fin 3-1, microstrip feed line 3-2 and ground strip 3-4 of the present embodiment are coated in PTFE medium substrate (integrated circuit
Plate) on, the dielectric constant of the PTFE medium substrate is 2.55.Radiation fin 3-1, microstrip feed line 3-2 and ground strip 3-4 are
The copper sheet of 0.1 to 0.2 millimeters thick.A length of 32 millimeters of radiation fin 3-1, a width of 10 millimeters.Microstrip feed line 3-2 a length of 15 milli
Rice, a width of 1 millimeter.A length of 20 millimeters of ground strip 3-4, a width of 9 millimeters.
Reference picture 6, Fig. 6 are the circuit block diagram of signal generating circuit.Signal caused by the signal generating circuit of the present embodiment
For superfrequency decimetric wave modulated signal.Signal generating circuit 3-3 includes voltage controlled oscillator (VCO) 3-3a, voltage regulator circuit 3-
3b, ON-OFF control circuit 3-3c, matching network circuit 3-3d and transmitter module power circuit 3-3e.Transmitter module power circuit 3-
3e is that voltage controlled oscillator (VCO) 3-3a, voltage regulator circuit 3-3b and ON-OFF control circuit 3-3c power, matching network circuit 3-
3d is passive circuit, and it is connected with poliarizing antenna.Voltage controlled oscillator 3-3a is electric with voltage regulator circuit 3-3b, switch control respectively
Road 3-3c and matching network 3-3d are connected.Voltage regulator circuit 3-3b causes voltage controlled oscillator 3-3a for producing different voltage
Produce the signal of different frequency.ON-OFF control circuit 3-3c is used to control voltage controlled oscillator 3-3a to produce am signals, this
The ON-OFF control circuit of embodiment is 2KHz modulation switch control circuits.Matching network circuit 3-3d is used for voltage controlled oscillator 3-
Signal is matched with poliarizing antenna caused by 3a, is easy to signal outwards to be propagated by poliarizing antenna.Caused by voltage controlled oscillator
Exported after the matched lattice network of signal through microstrip feed line to radiation fin.Voltage controlled oscillator in this example uses superfrequency decimetric wave
Signal produces chip.
Reference picture 7, Fig. 7 are the structural representation of signal receiving module, and signal receiving module includes plastic casing 1, metal
Shielding case 2, surface-mounted integrated circuit 3 and coaxial cable connector, be provided on surface-mounted integrated circuit reception signal poliarizing antenna and
Signal receiving circuit 3-5, signal receiving circuit 3-5 earth terminal are connected ground connection with the ground strip of poliarizing antenna.Signal launches mould
Block only has a coaxial cable connector 4 to power, and signal receiving module has two coaxial cable connectors 4-1,4-2, point
It Yong Lai not power and transmit data.The poliarizing antenna of signal emission module and the poliarizing antenna of signal receiving module have identical
Polarised direction, the structure of two antennas are identical.
As shown in figure 8, the signal receiving circuit 3-5 of signal receiving module includes matched filtering circuit 3-5a, wave detector 3-
5b, amplifying circuit 3-5c, output protection circuit 3-5d and receiving module power circuit 3-5e.Receiving module power circuit 3-5e is
Wave detector 3-5b, amplifying circuit 3-5c, output protection circuit 3-5d power supplies, matched filtering circuit 3-5a, wave detector 3-5b, amplification
Circuit 3-5c, output protection circuit 3-5d are sequentially connected, and matched filter network 3-5a is used for the impedance for matching antenna and wave detector,
And unnecessary interference signal is filtered out, improve measurement accuracy.Wave detector 3-5b is used for the envelope for detecting antenna reception signal, completes
The demodulation function of reception signal.Amplifying circuit 3-5c is used for output signal after amplification demodulator, and output protection circuit 3-5d is used to prevent
Influence caused by protecting the not normal receiving device to rear end of output signal.The signal that signal emission module is sent is by signal receiving module
Signal receiving circuit is reached through microstrip feed line after antenna reception, after signal is by matched filtering Circuit Matching, demodulates, amplify through detection
After export.
Signal caused by the present embodiment signal emission module is modulating frequency 2KHz superfrequency decimeter range modulated signal,
The superfrequency decimeter range modulated signal that the modulating frequency of signal receiving module reception signal transmitter module transmitting is 2KHz, goes forward side by side
Row demodulation, while purifying signal is carried out using 2KHz narrow band filters in follow-up measurement apparatus, same frequency electromagnetism can be reduced
The interference of signal, improves measurement accuracy.The frequency of modulated signal can also select other frequencies, such as 4KHz, 8KHz.
Fig. 9 a, Fig. 9 b, the HFSS simulated radiation directional diagrams that Fig. 9 c are the present embodiment poliarizing antenna, along the side of microstrip transmission line
To for x-axis direction.From antenna pattern as can be seen that the poliarizing antenna radiation of the present embodiment has good directionality, can subtract
Less due to influence of the diffraction to measurement accuracy.
Figure 10 is that 0.1GHZ-10GHz electromagnetic wave attenuations are surveyed using vector network analyzer in laboratory conditions
Measure the schematic diagram of experiment.It is respectively 0.1GHz-1.2GHz, 1GHz-3GHz, 3GHz- that working frequency is employed in measurement experiment
7GHz, 7GHz-11GHz four kinds of antennas measure.It is 258mm × 175mm × 300mm's that oil water mixture is mounted in into size
In transparent plastic pail, the height of crude oil layer is about 140mm, and the height of water layer is about 140mm, and antenna is placed in the both sides of Plastic Drum
Outer surface, vector network analyzer Q are connected with antenna a, b respectively, and under the conditions of 25 DEG C of room temperature, antenna moves from bottom to top along bucket wall
It is dynamic, measure.Using Network Analyzer from 100MHz to 10GHz, a Frequency point is chosen every 50MHz, is measured in difference
Crude oil at different height under frequency, water, oil water mixture different medium are to the attenuation of electromagnetic wave.It has chosen in Figure 11 a to Figure 11 k
The representative curve of different frequency range electromagnetic wave attenuation, the Frequency point of selection be respectively 0.1GHz, 1GHz, 2GHz, 3GHz, 4GHz,
5GHz、6GHz、7GHz、8GHz、9GHz、10GHz.Transmission coefficient S21 curves can be seen that in 2GHz to 3GHz frequency ranges from figure
At different height (i.e. medium is different), the attenuation of electromagnetic wave has significant difference：Height eminence attenuation is small, and medium is crude oil part,
Height lower attenuation is big, and medium is water layer.Data measured by according to more than are compared, in order to accurately measure profit
Interface, the band bandwidth of poliarizing antenna is preferably 2GHz~3GHz.
Figure 12 is to measure different height opening position reception signal amplitude using the sensor of the present embodiment under laboratory condition
Schematic diagram.Fixed signal transmitter module A and signal receiving module B, the distance of two intermodules is 15 centimetres, using coaxial line
Feed, transmission signal.140mm water is added in 258mm × 175mm × 300mm Plastic Drum, and adds 140mm crude oil.
Because density is different, crude oil and water natural layering simultaneously form emulsion layer on layering interfaces.Signal emission module and signal receive
Module is connected with follow-up measurement apparatus respectively, under conditions of 25 DEG C of room temperature, by signal emission module and signal receiving module
It is positioned in oil water mixture, measures reception signal amplitude size at diverse location, measurement height and position chooses crude oil layer respectively
(being highly 20cm), oil mixing with water layer (being highly 14cm), water layer (being highly 5cm) measure, and obtained experimental data is such as
Under：
Peak-to-peak value (the unit of reception signal at the different frequency of table 1：V)
Table 1 is to utilize data list of the sensor of the present embodiment to measuring to obtain at oil, water and mixing layering interfaces.By
Table 1 is differed greatly as can be seen that between signal frequency 2.2GHz to 2.6GHz by different medium attenuation loss, can be effective
The position of oil-water interfaces is measured on ground, is also demonstrated selection band bandwidth and is advantageous to measure for 2GHz~3GHz poliarizing antenna,
Improve measurement resolution capability.
When sensor of the invention is used to measure oil-water interfaces, the poliarizing antenna of transmission signal and the polarization day of reception signal
The antenna structure of line is identical, and the polarization characteristic of antenna is identical, receives the transmitting antenna of signal emission module and signal during measurement
The reception antenna parallel interval of module is placed, and makes the polarised direction of the antenna of two modules identical, and guarantee receives good spoke
Signal is penetrated, to avoid unnecessary attenuation caused by the difference of antenna polarization direction.During measurement, the signal production of signal emission module
Raw circuit produces the superfrequency decimetric wave modulated signal of specific modulation frequency (such as 2KHz), polarization of the signal through signal emission module
Aerial radiation is gone out, and signal is received after diectric attenuation by signal receiving module, and the wave detector of signal receiving module will receive
Signal post-detection demodulate to obtain respective frequencies (such as 2KHz) square wave, square-wave signal both it is observed that the bottom of receiving module is made an uproar,
Also can observation signal decay size, while can by the feature frequency-selective filtering of signal, effectively filter out with frequency and it is other interference believe
Number.
As shown in Figure 13 to Figure 14, it is applied to a kind of specific of oil tank oil-water interfaces measurement for the measurement sensor of the present invention
Embodiment.The signal emission module of previous embodiment and signal receiving module are spaced apart in mounting box 10, the installation
Box is metal corrosion-resistant enclosed box body.The interface 101 for powering with data transfer is provided with mounting box 10, it is same for connecting
Axis cable, for signal transmitting/receiving module power supply and data transfer.(mould the part of the built-in poliarizing antenna of sensor housing
Material shell 1) it is exposed to outside mounting box 10 so that the antenna of sensor can send and receive signal.During measurement, by highly controlling
Mechanism controls mounting box 10 moves up and down in the interior edge tank elevation direction of oil tank 11.The elevation control mechanism therefor of the present embodiment includes moving
Dynamic driver element 12, balancing weight 13, messenger 14, dragline 15.Balancing weight 13 is connected to the bottom of dragline 15, under mounting box 10
Side, dragline 15 are connected through the guide hole a on mounting box 10 with balancing weight 13, and dragline 15 keeps perpendicular under the effect of balancing weight 13
Directly, so as to ensureing the linear motion of mounting box.Messenger is located at the top of mounting box 10, is connected with mounting box 10, and messenger 14 is around peace
Guide wheel mounted in the top of oil tank 11 is connected with mobile driver element 12, and mobile driver element 12 uses motor, mobile driver element
During 12 work, mounting box 10 is drawn by messenger 14 and moved up and down along dragline 15, simultaneous metering device metering mounting box declines
Distance.Dragline can also use guide rail to replace, or gear or thread bush are installed on mounting box, using gear and ratch or spiral shell
Line covers the cooperation control mounting box movement with screw mandrel.During mounting box 10 is mobile in oil tank 11, signal emission module
The continuous transmission signal of poliarizing antenna, the poliarizing antenna reception signal of signal receiving module simultaneously transmit a signal to outside measurement
Device, measurement apparatus is recorded in the amplitude size of reception signal at diverse location, according under the size and mounting box of signal amplitude
The distance of drop judges the position of oil water surface.
The signal emission module of inventive sensor is placed in oil tank when being measured with signal receiving module, and signal receives mould
Block directly receives the antenna polarization side of the signal from signal emission module, synchronous signal transmitter module and signal receiving module
To identical poliarizing antenna, the electromagnetic signal direction of aerial radiation is single, the electromagnetic wave tool of the antenna transmitting of signal emission module
There is good directionality, the antenna of signal receiving module can only receive the signal of specific direction, have in particular directions very high
Efficiency, the penetration capacity of signal is improved, so as to reduce the reflection of electromagnetic signal, the diffraction of the interface of oil and gas, Multipath Transmission to surveying
The influence that accuracy of measurement is brought
Certainly, technical concept of the invention is not limited in above-described embodiment, can also be obtained according to the design of the present invention
Many different concrete schemes, for example, sensor housing is cylindrical shape in embodiment, it is possible to reduce hang oil, but can also use
The other shapes such as square, prismatic；In addition, the installation of antenna, surface-mounted integrated circuit for convenience, sensor outer housing is in embodiment
The housing separated up and down, but can also use integral structure, can be between the plastic casing and metal shielding of separate type
Connected using modes such as buckle, stickups；Such as these change and equivalent transformation should be included in described in technical solution of the present invention
Within the scope of.
Claims (10)
1. a kind of measuring method of oil-water interfaces, it is characterised in that comprise the following steps：
Step 1, by poliarizing antenna to being put into medium to be measured, one of poliarizing antenna as transmitting antenna, another
Poliarizing antenna is as reception antenna, and two poliarizing antenna polarised directions are identical and parallel interval is set；
Step 2, make poliarizing antenna to vertically being moved in medium to be measured, transmitting antenna radiation letter in moving process
Number, reception antenna reception signal；
Step 3, record poliarizing antenna are to the reception signal amplitude at diverse location in moving process, the unidirectional shifting of poliarizing antenna pair
Dynamic total distance is H, and poliarizing antenna is l to mobile unit distance once, and n represents poliarizing antenna to location, n opening positions
Reception signal amplitude be Q (n), poliarizing antenna can measure the reception signal width at N number of diverse location to a mobile stroke
Value, N=H/l, n=1 ..., N；
Step 4, the reception signal amplitude Q (n) for calculating each opening position and signal amplitude reference value Q in crude oilHThe absolute value of difference
R (n) and reception signal amplitude Q (n) and submarine signal amplitude reference value QLThe absolute value X (n) of difference：
R (n)=| Q (n)-QH|,
X (n)=| Q (n)-QL|；
Wherein, QHFor signal amplitude reference value, Q in crude oilLFor submarine signal amplitude reference value；
Step 5, find out R (n) and be less than CH×QHWhen n value, form set R, find out X (n) and be less than CL×QLWhen n value, group
Into set X, wherein, CHFor measurement error parameter, C in oilLFor measurement error parameter in water；
Step 6, find out minimum value R in set RminAnd the maximum X in set Xmax；
It is water layer in the range of 0~H if set R is empty set；It is oil reservoir in the range of 0~H if set X is empty set；
Step 7, calculate H1=l × Xmax, H2=l × Rmin, it is water layer in the range of 0~H1, is oil mixing with water in the range of H1~H2
Layer, it is oil reservoir in the range of H2~H.
2. the measuring method of oil-water interfaces according to claim 1, it is characterised in that：The frequency band of described two poliarizing antennas
With a width of 2GHz~3GHz.
3. the measuring method of oil-water interfaces according to claim 2, it is characterised in that：Described two poliarizing antennas are micro-strip
Antenna.
4. the measuring method of the oil-water interfaces according to claim 1 or 2 or 3, it is characterised in that：The transmitting antenna is set
In signal emission module, the reception antenna is arranged in signal receiving module；
The signal emission module includes sensor outer housing, the surface-mounted integrated circuit being arranged in the sensor outer housing, is arranged at
Signal generating circuit on the surface-mounted integrated circuit, the coaxial cable connector being arranged on the sensor outer housing, launch day
Line is arranged on surface-mounted integrated circuit and is connected with the signal generating circuit, and the coaxial cable connector produces with the signal
Circuit is connected, to be powered to the signal generating circuit；
The signal receiving module includes sensor outer housing, the surface-mounted integrated circuit being arranged in the sensor outer housing, is arranged at
Signal receiving circuit on the surface-mounted integrated circuit, the coaxial cable connector being arranged on the sensor outer housing, receive day
Line is arranged on surface-mounted integrated circuit and is connected with the signal receiving circuit, and the coaxial cable connector receives with the signal
Circuit is connected, to transmit data with outside to signal receiving circuit power supply.
5. the measuring method of oil-water interfaces according to claim 4, it is characterised in that：Described two poliarizing antennas include spoke
Penetrate piece, microstrip feed line and ground strip, the radiation fin is connected with the microstrip feed line and is arranged at the upper surface of surface-mounted integrated circuit
On, the ground strip is arranged on the lower surface of surface-mounted integrated circuit, the signal generating circuit and signal receiving circuit respectively with
The microstrip feed line is connected, the ground strip ground connection.
6. the measuring method of oil-water interfaces according to claim 5, it is characterised in that：The radiation fin is rectangle, described
The center line of ground strip and the center line of radiation fin are perpendicular.
7. the measuring method of the oil-water interfaces according to claim 5 or 6, it is characterised in that：The radiation fin, microstrip feed line
And the copper sheet that ground strip is 0.1~0.2 millimeters thick, the polarization of the poliarizing antenna and signal receiving module of the signal emission module
The distance between antenna is 15 centimetres.
8. the measuring method of oil-water interfaces according to claim 4, it is characterised in that：The sensor outer housing by plastics outside
Shell and metal shielding composition, described two poliarizing antennas are located in plastic casing, and the signal generating circuit and signal receive
Circuit is respectively in metal shielding.
9. the measuring method of oil-water interfaces according to claim 4, it is characterised in that：The signal generating circuit includes pressure
Controlled oscillator, voltage regulator circuit, ON-OFF control circuit, matching network circuit and transmitter module power circuit, the transmitting mould
Block power circuit is that the voltage controlled oscillator, voltage regulator circuit and ON-OFF control circuit power supply, the voltage controlled oscillator are distinguished
It is connected with the voltage regulator circuit, ON-OFF control circuit and matching network, the matching network circuit is connected with transmitting antenna.
10. the measuring method of oil-water interfaces according to claim 4, it is characterised in that：The signal receiving circuit includes
Matched filtering circuit, wave detector, amplifying circuit, output protection circuit and receiving module power circuit, the receiving module power supply
Circuit be the wave detector, amplifying circuit, output protection circuit power supply, the matched filtering circuit, wave detector, amplifying circuit,
Output protection circuit is sequentially connected, and the matched filter network is connected with reception antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080032.1A CN104897240B (en) | 2015-02-13 | 2015-02-13 | A kind of measuring method of oil-water interfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080032.1A CN104897240B (en) | 2015-02-13 | 2015-02-13 | A kind of measuring method of oil-water interfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104897240A CN104897240A (en) | 2015-09-09 |
| CN104897240B true CN104897240B (en) | 2018-01-19 |
Family
ID=54030049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510080032.1A Active CN104897240B (en) | 2015-02-13 | 2015-02-13 | A kind of measuring method of oil-water interfaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104897240B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017089396A1 (en) * | 2015-11-24 | 2017-06-01 | Danieli Corus B.V. | A method and a system measuring liquid and solid materials in the process of converting iron to steel in metallurgical vessels or furnaces |
| CN111473840B (en) * | 2020-04-24 | 2021-11-12 | 泰华智慧产业集团股份有限公司 | Waveform identification type ultrasonic liquid level meter and measuring method thereof |
| CN114086944B (en) * | 2021-11-09 | 2023-07-18 | 中海石油(中国)有限公司 | Monitoring method and system for improving monitoring precision of oil-water interface of reservoir after casing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5260660A (en) * | 1990-01-17 | 1993-11-09 | Stolar, Inc. | Method for calibrating a downhole receiver used in electromagnetic instrumentation for detecting an underground conductor |
| CN1232542A (en) * | 1996-10-07 | 1999-10-20 | 宾迪卡特公司 | Material interface level sensing |
| CN102052952A (en) * | 2010-11-18 | 2011-05-11 | 陕西科技大学 | Oil-water interface measuring device of crude oil storage tank and measuring method thereof |
| JP2011521257A (en) * | 2008-05-22 | 2011-07-21 | ローズマウント タンク レーダー アクチボラゲット | Multi-channel radar level gauge system |
| CN202485753U (en) * | 2011-09-21 | 2012-10-10 | 李周利 | Intelligent microwave switch |
| CN203615989U (en) * | 2013-09-25 | 2014-05-28 | 陕西科技大学 | Oil-water interface measuring instrument |
| CN203657889U (en) * | 2013-12-31 | 2014-06-18 | 陕西科技大学 | Novel oil-water interface measuring instrument |
-
2015
- 2015-02-13 CN CN201510080032.1A patent/CN104897240B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5260660A (en) * | 1990-01-17 | 1993-11-09 | Stolar, Inc. | Method for calibrating a downhole receiver used in electromagnetic instrumentation for detecting an underground conductor |
| CN1232542A (en) * | 1996-10-07 | 1999-10-20 | 宾迪卡特公司 | Material interface level sensing |
| JP2011521257A (en) * | 2008-05-22 | 2011-07-21 | ローズマウント タンク レーダー アクチボラゲット | Multi-channel radar level gauge system |
| CN102052952A (en) * | 2010-11-18 | 2011-05-11 | 陕西科技大学 | Oil-water interface measuring device of crude oil storage tank and measuring method thereof |
| CN202485753U (en) * | 2011-09-21 | 2012-10-10 | 李周利 | Intelligent microwave switch |
| CN203615989U (en) * | 2013-09-25 | 2014-05-28 | 陕西科技大学 | Oil-water interface measuring instrument |
| CN203657889U (en) * | 2013-12-31 | 2014-06-18 | 陕西科技大学 | Novel oil-water interface measuring instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104897240A (en) | 2015-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104729627B (en) | Oil-water interfaces measurement sensor | |
| US9863893B2 (en) | Sensor apparatus for measurement of material properties | |
| CN101382599B (en) | Transient electromagnetical method for reservoir pore space anisotropy | |
| CN104897240B (en) | A kind of measuring method of oil-water interfaces | |
| WO2011115646A1 (en) | Single well reservoir imaging apparatus and methods | |
| MX2011011946A (en) | Compensated directional resistivity measurements. | |
| CA2663477A1 (en) | An antenna for an electromagnetic probe for investigating geological formations and its applications | |
| AU2015315792A1 (en) | Excitation and use of guided surface wave modes on lossy media | |
| AU2015314920B2 (en) | Remote surface sensing using guided surface wave modes on lossy media | |
| CN104659491B (en) | A kind of miniature reception antenna and azimuth method of estimation for HF/VHF radars | |
| CN102966348A (en) | Device and method for measurement while drilling of direction resistivity by using non-full circle antennas | |
| CN102509900B (en) | Directed dipole antenna for underground earth-probing radar | |
| CN112803152A (en) | Meteor radar detection antenna | |
| CN111122977B (en) | Over-drill resistivity measurement while drilling method and device | |
| Alvertos et al. | Bow-tie antenna for underwater Wireless Sensor Networks | |
| EP3218700B1 (en) | Multi-phase fluid fraction measurement | |
| CN109298423A (en) | A kind of survey wave radar based on continuous wave | |
| CN102818933A (en) | Method for remotely sensing sea surface conductance distribution by high-frequency ground wave radar | |
| Oloumi | Oil well monitoring by ultra-wideband ground penetrating synthetic aperture radar | |
| KR101807116B1 (en) | Test apparatus of underground model | |
| CN105006648B (en) | Double frequency for high frequency marine radar receives and dispatches spike antenna system altogether | |
| CN111257350B (en) | Microwave backscattering-based crude oil water content field measurement and imaging device and method | |
| CN110220570B (en) | Guided wave tube type radar liquid level meter of integrated temperature transmitter | |
| CN112882113A (en) | Coil structure of remote detection electromagnetic logging instrument for open hole well | |
| Henry et al. | 3D scanning radar for the remote reading of passive electromagnetic sensors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |