CN202221325U - Multiphase flowmeter for down-well pipeline - Google Patents
Multiphase flowmeter for down-well pipeline Download PDFInfo
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- CN202221325U CN202221325U CN2011203023223U CN201120302322U CN202221325U CN 202221325 U CN202221325 U CN 202221325U CN 2011203023223 U CN2011203023223 U CN 2011203023223U CN 201120302322 U CN201120302322 U CN 201120302322U CN 202221325 U CN202221325 U CN 202221325U
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Abstract
The utility model relates to a multiphase flowmeter for down-well pipeline, which is characterized in that: two sets of light intensity modulation type fiber sensors are equipped at an outlet of oil well pipeline for respectively measuring light reflectivity and light transmittance of crude oil; proportion of each phase of oil-gas-water three-phase mixed liquid in unit time can be calculated after processing; flow of the mixed liquid in unit time is measured through a phase modulation type fiber sensor; and the flow of each single phase in unit time is calculated according to proportional relationship. TMS320LF24075 is used for performing comprehensive analysis processing of data. The quality of the crude oil can be determined in real time, thereby providing necessary data for quick oil production technology correction. The multiphase flowmeter for the down-well pipeline has the following advantages: high data collection accuracy, high multiphase flow distinguishing effect, high convenience in use, flexible operation, high practicability, and wide application prospect for the fields such as oil field.
Description
Technical field
The present invention relates to a kind of multi-phase flowmeter that is used for the down-hole pipeline, belong to data acquisition processing system, be suitable for fields such as oil field.
Background technology
Current, global energy crisis, oil price surpasses 100 dollars/barrel, and for better recover petroleum, energy savings requires increasingly high to the data processing in the recover petroleum.
The technology of in oil exploitation, mainly using is: after needing to measure plurality of data; Go out the flow of each phase again according to these data computation; Make flow accuracy receive very big influence, most of in the market multi-phase flowmeters each phase measuring error under most of fluidised form is ± 10%; All technology that are used for heterogeneous metering at present all require the necessary characteristic of grasping fluid, like specific inductive capacity, mass absorption coefficient etc., could measure more accurately.If changing appears in fluid behaviour or multi-phase flowmeter is used for many well meterings, the sensor of evaluation that must be frequent and demarcation multi-phase flowmeter.
The problem and the shortcoming that exist are: the highest suitable void fraction of several kinds of main multi-phase flowmeters is 0.9%～1.0% on the market, and along with the increase of void fraction, the measuring accuracy of liquid phase will be affected; Multi-phase flowmeter generally adopts as radiation sources such as microwaves, and relevant rules have strict restriction to using radiation source; Present multi-phase flowmeter is demarcated facility can only demarcate the component surveying instrument preferably, and fluid-velocity survey is not had gratifying scaling method as yet.
Summary of the invention
The technical matters that solves
Weak point for fear of prior art; The present invention proposes a kind of multi-phase flowmeter that is used for the down-hole pipeline; Release the ratio of each component according to the variation of heterogeneous fluid optical index; Need not polyphasic flow is separated the real time discriminating that just can realize former oil quality, thereby reach the purpose of quick correction DP technology.
Thought of the present invention is: having designed with the TMS320LF2407A chip is the multi-phase flowmeter signal processing circuit of core; Designed the Fibre Optical Sensor that is applied to this kind multi-phase flowmeter; Sensor designs signal transmitting transmission circuit.
Technical scheme
A kind of multi-phase flowmeter that is used for the down-hole pipeline is characterized in that comprising down-hole acquisition subsystem and aboveground processing subsystem; Said down-hole acquisition subsystem comprise Fibre Optical Sensor group, temperature sensor, pressure transducer and with the voltage current adapter that connects separately; Temperature sensor and pressure transducer are arranged on the tube wall of oil country tubular good exit pipeline one side; The temperature signal of temperature sensor becomes current signal to transfer to aboveground processing subsystem through voltage current adapter conversion back, and the pressure signal of pressure transducer becomes current signal to transfer to aboveground processing subsystem through voltage current adapter conversion back; The Fibre Optical Sensor group comprises light source, two sapphire lens, two intensity modulation type Fibre Optical Sensors and phase modulation-type Fibre Optical Sensor; At parallel light source, intensity modulation type Fibre Optical Sensor and the phase modulation-type Fibre Optical Sensor of being provided with of a side of tube wall; Intensity modulation type fiber sensor measuring is through the intensity of reflected light of piping, and becomes current signal to transfer to aboveground processing subsystem through after photoelectric commutator and the voltage current adapter conversion; On the optical axis of light source, be provided with intensity modulation type Fibre Optical Sensor at the opposite side tube wall, measure transmitted intensity through piping, and through photoelectric commutator with become current signal to transfer to aboveground processing subsystem after voltage current adapter is changed; Receiving end at the intensity modulation type Fibre Optical Sensor of the transmitting terminal of light source and a relative side is provided with the sapphire lens; Said aboveground processing subsystem comprises current-to-voltage convertor, A/D converter, reshaper, counter and DSP digital processing unit; The data of acquisition subsystem under the current-to-voltage convertor received well; Convert voltage signal into through current-to-voltage convertor, advance back formation digital signal through A/D converter and export the DSP digital processing unit to; Reshaper is a pulse signal with the signal shaping of current-to-voltage convertor, exports the counter pulse signals to and counts.
Said DSP digital processing unit adopts the TMS320LF2407A chip.
Said light source is a large-power light-emitting diodes.
Beneficial effect
A kind of multi-phase flowmeter that is used for the down-hole pipeline that the present invention proposes has two obvious advantages: one, data acquisition precision is high.Because optical sensor is inner at oil well, gas not volatilization as yet in the crude oil, the data reliability that obtains like this is high; Two, DSP express-analysis data, native system adopt TMS320LF2407A as digital signal processor, process multi-channel signal simultaneously, and can guarantee that system high efficiency is stable.
Description of drawings
Fig. 1: systematic schematic diagram of the present invention;
Fig. 2: sensor of the present invention is installed schematic diagram;
Fig. 3: light path principle figure of the present invention;
Fig. 4: the shaper of embodiment of the invention frequency signal, counter circuit schematic diagram;
Fig. 5: the voltage current adapter of embodiment of the invention temperature sensor;
Fig. 6: the voltage current adapter of embodiment of the invention pressure transducer.
Embodiment
Combine embodiment, accompanying drawing that the present invention is further described at present:
The embodiment of the invention is seen accompanying drawing 1, comprises down-hole acquisition subsystem and aboveground processing subsystem, and the down-hole acquisition subsystem is delivered to aboveground processing subsystem with the signal that collects, and aboveground processing subsystem is with mean flow rate V, light transmission I
T, light reflectivity I
R, pressure P, these 5 signals of temperature T analog signal conversion be to handle after the digital signal, obtain measurement result.
Described aboveground signal processing subsystem: see Fig. 1, Fig. 4: comprise current-to-voltage convertor, A/D converter, reshaper, counter and DSP digital processing unit; The data of acquisition subsystem under the current-to-voltage convertor received well; Convert voltage signal into through current-to-voltage convertor, advance back formation digital signal through A/D converter and export the DSP digital processing unit to; Reshaper is a pulse signal with the signal shaping of current-to-voltage convertor, exports the counter pulse signals to and counts.
Four tunnel 4～20mA current signals and one road frequency signal that the down-hole acquisition subsystem is seen off.Directly convert the voltage signal of 0.6～3V into, gather by A/D converter through 150 Ω precision resistances; After the frequency signal of 4～20mA converts voltage signal to; By the voltage reshaper it is shaped as pulse signal; Utilize counter pulse signals counting (see figure 5), after one section interior count results process of specified time interval latchs, can be processed the I/O interface collection of device.A/D converter adopts the AD574 chip of AD company, and it becomes the manageable digital signal of DSP digital processing unit with analog signal conversion.DSP adopts TMS 320LF2407A chip, and the digital signal that collects is handled.Deposit result in sheet outer FLASH storer successively, host computer regularly reads through the RS-485 serial communication interface.
Mean flow rate V, light transmission I
T, light reflectivity I
R, after pressure P, these 5 signals of temperature T be processed device and obtain, promptly can calculate or table look-up and draw oil gas water ratio and each single-phase flow according to certain relation.Deposit data in sheet outer FLASH storer, regularly read through the RS-485 serial communication interface by host computer.Sampling time interval and gate time length need be provided with in acquisition controlling software according to on-site actual situations.Relation between oil gas water ratio and the semaphore does not temporarily also have strict mathematical derivation formula, need demarcate according to experimental data, obtains experimental formula.
Said down-hole acquisition subsystem is seen Fig. 2, Fig. 3; Comprise Fibre Optical Sensor group, temperature sensor, pressure transducer and with the voltage current adapter that connects separately; Temperature sensor and pressure transducer are arranged on the tube wall of oil country tubular good exit pipeline one side; The temperature signal of temperature sensor becomes current signal to transfer to aboveground processing subsystem through voltage current adapter conversion back, and the pressure signal of pressure transducer becomes current signal to transfer to aboveground processing subsystem through voltage current adapter conversion back; The Fibre Optical Sensor group comprises light source, two sapphire lens, two intensity modulation type Fibre Optical Sensors and phase modulation-type Fibre Optical Sensor; At parallel light source, intensity modulation type Fibre Optical Sensor and the phase modulation-type Fibre Optical Sensor of being provided with of a side of tube wall; Intensity modulation type fiber sensor measuring is through the intensity of reflected light of piping, and becomes current signal to transfer to aboveground processing subsystem through after photoelectric commutator and the voltage current adapter conversion; On the optical axis of light source, be provided with intensity modulation type Fibre Optical Sensor at the opposite side tube wall, measure transmitted intensity through piping, and through photoelectric commutator with become current signal to transfer to aboveground processing subsystem after voltage current adapter is changed; Receiving end at the intensity modulation type Fibre Optical Sensor of the transmitting terminal of light source and a relative side is provided with the sapphire lens.
A is a crude oil, and B is the light beam that light source 1 sends, and C is the sapphire lens, and D is a folded light beam.Intensity modulation type Fibre Optical Sensor 2, measuring light transmissivity I
T, light reflectivity I
RPhase modulation-type Fibre Optical Sensor 3 is measured mean flow rate V; With pressure transducer 4, gaging pressure P; With temperature sensor 5, measure temperature T.The signal that Fibre Optical Sensor obtains at first will pass through optical fibre voltage sensor, converts voltage signal to.Because distance is longer between the sensor of down-hole and the ground based processor, in order to reduce the influence of signal attenuation and interference, sensor signal also need be passed through voltage current transformation before delivering to processor, convert the current signal of 4～20mA to.I
T, I
R, the voltage-current converter circuit of V, photoelectric commutator, adopt the voltage current adapter of ripe product to P and T, see Fig. 5, Fig. 6.
Selecting core diameter in the native system for use is the quartzy step multimode optical fiber of 62.5um, for improving the reliability of system works, at optical fiber added metal or plastic protective sleeve, avoids optical fiber in bad working environment, to receive damage.Adopt the light source of large-power light-emitting diodes as Fibre Optical Sensor.Utilize intensity modulation type Fibre Optical Sensor, sensor probe is inserted 5～10mm in the pipeline, utilize two photoelectric tubes to detect the variation of transmitted light and intensity of reflected light respectively, just can calculate oil gas water three's ratio through certain relation.Fibre Optical Sensor requires light source highly stable, and power is more than the milliwatt level, otherwise can't penetrate mixing material.Use phase modulation-type optical fiber processing device to measure the mixing material mean flow rate; According to the optics doppler phenomenon; Folded light beam and another road that has loaded flow velocity signal projects after relevant with reference to folded light beam and obtains a class frequency signal on the photo-detector, and the height of frequency has been represented the size of mean flow rate.The mensuration of flow velocity and profit gas ratio can be used same light source.
Claims (3)
1. a multi-phase flowmeter that is used for the down-hole pipeline is characterized in that comprising down-hole acquisition subsystem and aboveground processing subsystem; Said down-hole acquisition subsystem comprise Fibre Optical Sensor group, temperature sensor, pressure transducer and with the voltage current adapter that connects separately; Temperature sensor and pressure transducer are arranged on the tube wall of oil country tubular good exit pipeline one side; The temperature signal of temperature sensor becomes current signal to transfer to aboveground processing subsystem through voltage current adapter conversion back, and the pressure signal of pressure transducer becomes current signal to transfer to aboveground processing subsystem through voltage current adapter conversion back; The Fibre Optical Sensor group comprises light source, two sapphire lens, two intensity modulation type Fibre Optical Sensors and phase modulation-type Fibre Optical Sensor; At parallel light source, intensity modulation type Fibre Optical Sensor and the phase modulation-type Fibre Optical Sensor of being provided with of a side of tube wall; Intensity modulation type fiber sensor measuring is through the intensity of reflected light of piping, and becomes current signal to transfer to aboveground processing subsystem through after photoelectric commutator and the voltage current adapter conversion; On the optical axis of light source, be provided with intensity modulation type Fibre Optical Sensor at the opposite side tube wall, measure transmitted intensity through piping, and through photoelectric commutator with become current signal to transfer to aboveground processing subsystem after voltage current adapter is changed; Receiving end at the intensity modulation type Fibre Optical Sensor of the transmitting terminal of light source and a relative side is provided with the sapphire lens; Said aboveground processing subsystem comprises current-to-voltage convertor, A/D converter, reshaper, counter and DSP digital processing unit; The data of acquisition subsystem under the current-to-voltage convertor received well; Convert voltage signal into through current-to-voltage convertor, advance back formation digital signal through A/D converter and export the DSP digital processing unit to; Reshaper is a pulse signal with the signal shaping of current-to-voltage convertor, exports the counter pulse signals to and counts.
2. according to the said multi-phase flowmeter that is used for the down-hole pipeline of claim 1, it is characterized in that: said DSP digital processing unit adopts the TMS320LF2407A chip.
3. according to the said multi-phase flowmeter that is used for the down-hole pipeline of claim 1, it is characterized in that: said light source is a large-power light-emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203023223U CN202221325U (en) | 2011-08-18 | 2011-08-18 | Multiphase flowmeter for down-well pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203023223U CN202221325U (en) | 2011-08-18 | 2011-08-18 | Multiphase flowmeter for down-well pipeline |
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| Publication Number | Publication Date |
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| CN202221325U true CN202221325U (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203023223U Withdrawn - After Issue CN202221325U (en) | 2011-08-18 | 2011-08-18 | Multiphase flowmeter for down-well pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364046A (en) * | 2011-08-18 | 2012-02-29 | 西北工业大学 | Multi-phase flow meter for underground pipeline |
| CN104567986A (en) * | 2013-10-11 | 2015-04-29 | 中国人民解放军第二炮兵工程大学 | FBG (fiber bragg grating)-based multifunctional flow sensor provided with embedded standard nozzle |
-
2011
- 2011-08-18 CN CN2011203023223U patent/CN202221325U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364046A (en) * | 2011-08-18 | 2012-02-29 | 西北工业大学 | Multi-phase flow meter for underground pipeline |
| CN102364046B (en) * | 2011-08-18 | 2014-04-02 | 西北工业大学 | Multi-phase flow meter for underground pipeline |
| CN104567986A (en) * | 2013-10-11 | 2015-04-29 | 中国人民解放军第二炮兵工程大学 | FBG (fiber bragg grating)-based multifunctional flow sensor provided with embedded standard nozzle |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120516 Effective date of abandoning: 20140402 |
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| RGAV | Abandon patent right to avoid regrant |