CN203925466U - Probe-type gas holdup meter - Google Patents
Probe-type gas holdup meter Download PDFInfo
- Publication number
- CN203925466U CN203925466U CN201420235019.XU CN201420235019U CN203925466U CN 203925466 U CN203925466 U CN 203925466U CN 201420235019 U CN201420235019 U CN 201420235019U CN 203925466 U CN203925466 U CN 203925466U
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- Prior art keywords
- probe
- light source
- type gas
- gas holdup
- processing unit
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- Expired - Lifetime
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- 239000000523 sample Substances 0.000 claims abstract description 62
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 239000013307 optical fiber Substances 0.000 claims description 27
- 210000002445 nipple Anatomy 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 229910052594 sapphire Inorganic materials 0.000 claims description 6
- 239000010980 sapphire Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011799 hole material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 210000003934 vacuole Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000001579 optical reflectometry Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000005501 phase interface Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a kind of probe-type gas holdup meter, and probe-type gas holdup meter comprises stable current excitation light source, optical branching device, photo-coupler, sensing probe unit and signals collecting and processing unit; Stable current excitation light source is successively by optical branching device and photo-coupler access sensing probe unit; Optical branching device access signals collecting and processing unit.The utility model provides the probe-type gas holdup meter that a kind of certainty of measurement is high.
Description
Technical field
The utility model belongs to oil instrument class, relates to one and detects gas holdup instrument for underground mining oil, relates in particular to a kind of probe-type gas holdup meter.
Background technology
Deepening continuously of domestic most continental deposit oil field developments, oil field development enters late high water content period, all generations with gas in a large amount of oil mining processes.Therefore, oil gas water three phase flow measurement problem is more prevalent, causes the each parameter measurement technology of conventional oil well production profile and method can not adapt to new test environment.How to reduce or eliminate the adverse effect of gas phase, and bring into play the technical advantage of the ripe logging equipment of existing two phase flow, carry out three-phase flow liquid producing profile log and become field produces important topic urgently to be resolved hurrily and task.
At present, the main method that oil field well three-phase flow production profile gas holdup is measured comprises photographic process, conducting probe method and camera method etc.But all there is some problems and limitation in above-mentioned all multi-methods in actual applications, especially when bubble size changes greatly, bubble distribution and variable density be greatly time, measure error is particularly serious.
Optical sensing technology is novel measuring method, using light as measurement means.Measured environment is by after a certain characteristic of light wave (intensity, spectral line, phase place polarization) modulation, portable with environmental information to be measured in light wave, by measuring light wave relevant parameter, and carries out demodulation, can obtain environmental information to be measured.Fibre Optical Sensor has fast response time, precision is high, anti-interference, corrosion-resistant, and sensing arrangement part, without features such as charged work, becomes the direction of following logging method development while measuring.
Index modulation type optical fiber gas holdup sensor-based system, its dynamic detection range can reach gamut 0～100%, the variation of measuring media refractive index accurately, and Fibre Optical Sensor is because the passive operating characteristic of its uniqueness, anti-electromagnetic interference capability are strong, fast response time, certainty of measurement is high, resist the advantages such as corrosion-resistant, aspect measuring production profile of oil well, have unique advantage.
Utility model content
In order to solve the above-mentioned technical problem existing in background technology, the utility model provides the probe-type gas holdup meter that a kind of certainty of measurement is high.
Technical solution of the present utility model is: the utility model provides a kind of probe-type gas holdup meter, and its special character is: described probe-type gas holdup meter comprises stable current excitation light source, optical branching device, photo-coupler, sensing probe unit and signals collecting and processing unit; Described stable current excitation light source is successively by optical branching device and photo-coupler access sensing probe unit; Described optical branching device access signals collecting and processing unit.
Above-mentioned sensing probe unit comprises optical fiber, protective sleeve, seal nipple; Described seal nipple is sleeved on protective sleeve outside; Described protective sleeve is sleeved on outer fiber.
Above-mentioned sensing probe unit also comprises the one or multi-channel sealing ring being arranged on outside seal nipple.
Above-mentioned optical fiber is arrayed optical fiber.
Above-mentioned optical fiber is sapphire fiber.
The current excitation light source of aforementioned stable comprises light source driving circuit, light source output and luminous power tester; Described light source driving circuit is by luminous power tester access light source output; Described light source output is connected with optical branching device with light source driving circuit respectively.
Above-mentioned signals collecting and processing unit comprise photodetector, probe biasing circuit, probe amplifying circuit, signal acquisition circuit and data processing unit; Described probe biasing circuit and probe amplifying circuit access respectively photodetector; Described optical branching device is successively by photodetector and signal acquisition circuit access data processing unit.
Above-mentioned data processing unit is single-chip microcomputer or CPU.
The utility model has the advantages that:
The utility model provides a kind of probe-type gas holdup meter, and the utility model Application Optics sensing and photodetection principle comprise sensing probe unit, optic path device, light source and probe, signal processing, and the frame for movement matching.Gas holdup is analyzed and calculated to the utility model, by bubble, the size of oil vacuole and the measurement of quantity in pair cross-section.
Particularly, tool of the present invention has the following advantages:
1, the utility model adopts optical sensing mode to measure, and realizes the gas in three-phase flow is directly measured, and has effectively eliminated the error of bringing in conventional hybrid metering system, and certainty of measurement and resolution ratio improve greatly compared with traditional measurement mode.
2, the utility model adopts sapphire crystal as optical fiber (probe), has good physical and chemical performance, and mechanical performance is good, Heat stability is good, and corrosion-resistant height, light transmission is good.Measuring-signal adopts optical fibre transmission, can effectively resist extraneous electromagnetic interference, reduces loss.
3, frame for movement of the present utility model is simple, easy to maintenance, good looking appearance, exquisiteness; Each position is designed with spanner mouth position or roller flower, for convenience detach.Screw thread button-type is selected trapezoid buckle (Ai Kemu screw thread).Frame for movement is convenient to safety and is safeguarded, measurement category is wide, precision and resolution ratio.
Brief description of the drawings
Fig. 1 is refraction principle of reflection schematic diagram;
Fig. 2 is light reflectivity and transmissivity distribution schematic diagram under different refractivity environment;
Wherein: Fig. 2 a is reflectivity and the transmissivity distribution schematic diagram of light at probe and oil phase interface place;
Fig. 2 b is reflectivity and the transmissivity distribution schematic diagram of light at probe and water interface place;
Fig. 2 c is reflectivity and the transmissivity distribution schematic diagram of light at probe and gas phase interface place;
Fig. 3 is the structural representation of the sensing probe unit of probe-type gas holdup meter provided by the utility model;
Fig. 4 is the light path framework schematic diagram of probe-type gas holdup meter provided by the utility model;
Fig. 5 is signal acquisition process and the drive circuit flow chart that the utility model adopts;
Fig. 6 is that the utility model uses view;
Fig. 7 is the measuring process schematic diagram based on probe-type gas holdup meter provided by the utility model;
Wherein:
1-optical fiber; 2-protective sleeve; 3-seal nipple; 4-light source; 5-probe; 6-optical branching device; 7-coupled system; 8-current collecting umbrella;
Detailed description of the invention
Referring to Fig. 1, refraction principle of reflection figure, its measuring principle is that, according to the refractive index difference of downhole oil, gas, water three-phase flow, light will different optical phenomenas occur at probe from the interface place of three-phase flow well liquid.Determine rate: n according to refraction
0sin θ
0=n
1sin θ
1,
When probe refractive index n
0be greater than environment refractive index n to be measured
1, angle of incidence is greater than tan (n simultaneously
1/ n
0), will there is total reflection phenomenon in interface, all light energy is reflected back.When angle of incidence is less than tan (n
1/ n
0) time, will there is reflection and refraction effect at interface.
Referring to Fig. 2 (Fig. 2 a, Fig. 2 b and Fig. 2 c), according under different refractivity environment, light reflectivity, that transmissivity distribution map calculates is fuel-displaced, the reflective light intensity at water and probe interface.
Due to bubble and oil vacuole that being distributed as of three-phase flow in well liquid contained in water, can differentiate less bubble and oil vacuole in order to pop one's head in, therefore probe also should design as far as possible little; Although because less probe has improved resolution ratio, reduced measurement category, therefore optical fiber (probe) is designed to arrayed optical fiber (probe), increased measurement category.
Based on as above theoretical, the utility model provides a kind of probe-type gas holdup meter, and this probe-type gas holdup meter comprises stable current excitation light source, optical branching device, photo-coupler, sensing probe unit and signals collecting and processing unit; Stable current excitation light source is successively by optical branching device and photo-coupler access sensing probe unit; Optical branching device access signals collecting and processing unit; Wherein, sensing probe unit comprises optical fiber, protective sleeve, seal nipple; Protective sleeve is sleeved on outer fiber; Seal nipple is enclosed within protective sleeve outside.Sensing probe unit also comprises the one or multi-channel sealing ring being arranged on outside seal nipple; Optical fiber (probe) is arrayed optical fiber (probe).
The stable current excitation light source that the utility model adopts comprises light source driving circuit, light source output and luminous power tester; Light source driving circuit is by luminous power tester access light source output; Light source output is connected with optical branching device with light source driving circuit respectively.
The signals collecting that the utility model adopts and processing unit comprise photodetector, probe biasing circuit, probe amplifying circuit, signal acquisition circuit and data processing unit; Probe biasing circuit and probe amplifying circuit access respectively photodetector; Optical branching device is successively by photodetector and signal acquisition circuit access data processing unit.Data processing unit is single-chip microcomputer.Probe biasing circuit, probe amplifying circuit and signal acquisition circuit are all electronic devices and components conventional in electricity field; Data processing unit can adopt any computer software conventional or outsourcing or program or client oneself to write computer software programs based on as above theoretical foundation are realized the process such as calculating and processing or the function of data, and the utility model does not relate to any improvement to this.
Below, in connection with accompanying drawing, the utility model is elaborated:
1, the design of sensing probe and realization
Optical fiber gas holdup sensor-based system is index modulation type sensor, its certainty of measurement and scope depend primarily on the refractive index difference of optical fiber (probe) and acquisition environment, and difference is larger, phenomenon is more obvious, therefore select sapphire as optical fiber (probe) material.Sapphire refractive index is 1.75, and much larger than the refractive index of down-hole material, simultaneously sapphire has good light transmission, decay resistance, and stable physical and chemical performance, and mechanical performance, can adapt to the environment for use of down-hole harshness.
Optical fiber (probe) adopts the bonding agent of function admirable, and the form of O type circle sealing, realizes the sealing between optical fiber (probe), seal nipple and instrument.This kind of mode can ensure in down-hole 175 DEG C, the instrument sealing performance under the high temperature and high pressure environment of 80MPa.
The structural representation of sensing probe unit is as shown in Figure 3:
2, instrument light path design and realization
Instrument application optical sensing, fiber optics, photodetection, the principles such as optical coupled, its system block diagram as shown in Figure 4:
The laser that light source sends enters shunt by optical fiber, and shunt transmits light and is coupled in optic probe.Under different environment to be measured, will produce different optical phenomena (reflection and transmission) at probe and environmental interface to be measured place, probe returns to corresponding optical signal.Optical fiber is sent signal to optical branching device, and optical branching device is sent a part of light to photodetector.Probe carries out opto-electronic conversion to optical signal, the electric weight that output contains environment to be measured.
3, signal acquisition process and drive circuit
Referring to Fig. 5, light source driving circuit provides stable current excitation to light source, the Output optical power of light source is monitored simultaneously, provides feedback to light source driving circuit, revises exciting current, makes light source reach the constant output of luminous power.Probe biasing and amplifying circuit provide corresponding peripheral circuit to probe, ensure gain, output area and the impedance matching of photodetector.Photodetector carries out, after opto-electronic conversion, exporting the corresponding signal of telecommunication to optical signal.Signals collecting part gathers storage to the output of photodetector, and data processing section carries out analyzing and processing to signal, calculates gas holdup according to corresponding algorithm.
Measuring process of the present utility model is:
Referring to Fig. 6 and Fig. 7, during the utility model is positioned over and waits to log well, current collecting umbrella by the well liquid afflux of three-phase flow to optical sensing probe place, the gentle form with blister of oil is mixed in water, due to Oil, Water, Gas three's refractive index difference, interface place at optical fiber (probe) with environment to be measured, will there are different phenomenons in light.Be environment while being gas, total reflection phenomenon occurs, all light intensity are all reflected back optical fiber (probe), are surveyed subsequently output voltage signal after optical system by photodetector; When environment is water, reflection and transmission phenomenon occur, intensity of reflected light can be calculated by fresnel formula, and photodetector is surveyed reflective light intensity; Environment is when oil, and reflection and transmission phenomenon occur, and reflective light intensity can be calculated by fresnel formula, intensity when now light intensity is less than environment and is water, and photodetector is surveyed reflective light intensity.The optical fiber (probe) of array format is measured the three-phase flow in the well liquid of a certain cross section, and in its output waveform reaction three-phase flow, the information of each composition, analyzes by the impulse waveform of pair array signal, calculates well middle section gas holdup.
Claims (8)
1. a probe-type gas holdup meter, is characterized in that: described probe-type gas holdup meter comprises stable current excitation light source, optical branching device, photo-coupler, sensing probe unit and signals collecting and processing unit; Described stable current excitation light source is successively by optical branching device and photo-coupler access sensing probe unit; Described optical branching device access signals collecting and processing unit.
2. probe-type gas holdup meter according to claim 1, is characterized in that: described sensing probe unit comprises optical fiber, protective sleeve, seal nipple; Described seal nipple is sleeved on protective sleeve outside; Described protective sleeve is sleeved on outer fiber.
3. probe-type gas holdup meter according to claim 2, is characterized in that: described sensing probe unit also comprises the one or multi-channel sealing ring being arranged on outside seal nipple.
4. according to the probe-type gas holdup meter described in claim 2 or 3, it is characterized in that: described optical fiber is arrayed optical fiber.
5. probe-type gas holdup meter according to claim 4, is characterized in that: described optical fiber is sapphire fiber.
6. probe-type gas holdup meter according to claim 5, is characterized in that: described stable current excitation light source comprises light source driving circuit, light source output and luminous power tester; Described light source driving circuit is by luminous power tester access light source output; Described light source output is connected with optical branching device with light source driving circuit respectively.
7. probe-type gas holdup meter according to claim 6, is characterized in that: described signals collecting and processing unit comprise photodetector, probe biasing circuit, probe amplifying circuit, signal acquisition circuit and data processing unit; Described probe biasing circuit and probe amplifying circuit access respectively photodetector; Described optical branching device is successively by photodetector and signal acquisition circuit access data processing unit.
8. probe-type gas holdup meter according to claim 7, is characterized in that: described data processing unit is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235019.XU CN203925466U (en) | 2014-05-08 | 2014-05-08 | Probe-type gas holdup meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235019.XU CN203925466U (en) | 2014-05-08 | 2014-05-08 | Probe-type gas holdup meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203925466U true CN203925466U (en) | 2014-11-05 |
Family
ID=51821295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235019.XU Expired - Lifetime CN203925466U (en) | 2014-05-08 | 2014-05-08 | Probe-type gas holdup meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203925466U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982862A (en) * | 2020-08-01 | 2020-11-24 | 中国石油天然气股份有限公司 | Calculation method of gas-liquid two-phase flow gas holdup of optical fiber sensor |
| CN115792664A (en) * | 2023-02-08 | 2023-03-14 | 山东省科学院激光研究所 | Battery parameter detection device |
-
2014
- 2014-05-08 CN CN201420235019.XU patent/CN203925466U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982862A (en) * | 2020-08-01 | 2020-11-24 | 中国石油天然气股份有限公司 | Calculation method of gas-liquid two-phase flow gas holdup of optical fiber sensor |
| CN111982862B (en) * | 2020-08-01 | 2023-10-27 | 中国石油天然气股份有限公司 | Calculation method for gas-liquid two-phase flow gas holding rate of optical fiber sensor |
| CN115792664A (en) * | 2023-02-08 | 2023-03-14 | 山东省科学院激光研究所 | Battery parameter detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |