CN102392939A - Multiphase flow metering system and method - Google Patents
Multiphase flow metering system and method Download PDFInfo
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- CN102392939A CN102392939A CN2011102610997A CN201110261099A CN102392939A CN 102392939 A CN102392939 A CN 102392939A CN 2011102610997 A CN2011102610997 A CN 2011102610997A CN 201110261099 A CN201110261099 A CN 201110261099A CN 102392939 A CN102392939 A CN 102392939A
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Abstract
The invention claims a multiphase flow metering system and method, wherein the method includes mixing and accelerating the multiphase fluid, forming a symmetrical annular flow and two-stage splitting the flow; dividing the annular flow into 16 symmetrically arranged independent flow channels; taking the central four uniform jets as one path, separating the paths to respectively meter. The invention has the advantages that the metering system and two-stage flow splitting method are adopted to separate and meter the multiphase flow with flow-splitting type sampling method, the separator and the meter have simple structure and high metering precision.
Description
Technical field
The present invention relates to a kind of multiphase flow metering system and method for measurement of oil-gas gathering and transportation system.
Background technique
Multiphase flow metering is one of key technology of oil and gas industry, from last century the eighties so far, the research and development of multiphase flow metering has obtained bigger progress.
At present the existing oil gas field gathering system great majority of China all are employed on the defeated factory of collection, the Station To Station field each well and rotate method of measurement, rather than each well is carried out real time measure.Multiphase flow metering can be carried out oil, gas, water to a plurality of individual wells and carry out real time measure, and it has not only satisfied oil-gas field development department to the underground state oil in oil field, gas, the requirement of water flows state, and can simplify gathering and transferring process, saving substantial contribution.
At present, the multiphase flow metering also is in the stage of growth.The method of separating the metering of phase-splitting is more earlier mostly adopted in early stage multiphase flow metering, and this separate measurement method is not economic.Different both at home and abroad at present multiphase flow meterings is for example totally measured earlier then and is measured by the individual volume ratio that goes up mutually (or content) based on different theories and experiment achievement.Also have by individual phase velocity that goes up mutually and volume and recently measure, no matter survey phase velocity, or its surveying instrument of volume ratio is complicated, required precision is high.And heterogeneous fluidised form complicacy is ever-changing, and above-mentioned method of measurement precision is not high yet.
Summary of the invention
In order to overcome the above-mentioned shortcoming of existing technology, the invention provides a kind of multiphase flow metering system and method for measurement.
The technical solution adopted for the present invention to solve the technical problems is: a kind of multiphase flow metering system is serially connected with mixer, one-level shunt, one-level flow controller, first convergence device, two-step throttle device, second convergence device and divergent nozzle successively on heterogeneous fluid is flowed through the main line of downstream pipeline; After the one-level shunt, also isolate a bye-pass; On this bye-pass, be serially connected with secondary shunt and separator successively; After separator, isolate liquids and gases two bye-passes; Two bye-passes insert second convergence device on the main line respectively, on two bye-passes, are respectively arranged with fluid flowmeter and gas flowmeter; After the secondary shunt, also isolate a bye-pass and insert first convergence device on the main line.
Said fluid flow is counted the liquid Venturi meter; Said gas flow is counted the gas Venturi meter.Said mixer is a negative throat noz(zle).Said one-level flow controller and two-step throttle device are restricting orifice.Said first convergence device and second convergence device are and converge threeway.
The present invention also provides a kind of multiphase flow method of measurement, comprises the steps:
1) through mixer heterogeneous fluid is mixed and quicken, form the annular flow of symmetry;
2) one-level shunting:
The annular flow of symmetry gets into the one-level shunt, and the independent runner of 16 symmetrical distributions that comprised in the shunt is divided into 16 strands of on all four little a fluid streams, and getting its interval is one the tunnel for uniform four strands, makes its secondary shunt of flowing through; Other 12 strands is one the tunnel, makes its one-level flow controller of flowing through successively, first convergence device, two-step throttle device and second convergence device, arrives the downstream pipeline through divergent nozzle;
3) secondary shunting:
The independent runner of 16 symmetrical distributions that the fluid of secondary shunt of flowing through is comprised in the shunt is divided into 16 strands of on all four little a fluid streams; Getting its interval is one the tunnel for uniform four strands; Make its separator of flowing through, separated device separates into flow of liquid and gas stream, more respectively by after fluid flowmeter and the gas flowmeter metering; After second convergence device on the inflow main line and the fluid on the main line converge, arrive the downstream pipeline through divergent nozzle; Other 12 strands is one the tunnel, and the fluid on its flow through first convergence device and main line is converged.
Compared with prior art, good effect of the present invention is: adopt metering system of the present invention and method of measurement, come multiphase flow is carried out separate measurement through the flow deviding type sampling method, required separator and measurement instrument are simple in structure, and measuring accuracy is higher.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structure principle chart of multiphase flow metering system.
Embodiment
As shown in Figure 1, the multiphase flow metering system comprises mixer 2, one-level shunt 3, one-level flow controller 4, first convergence device 5, secondary shunt 6, separator 7, fluid flowmeter 8, gas flowmeter 9, two-step throttle device 10, second convergence device 11, divergent nozzle 12 etc.
, heterogeneous fluid 1 is serially connected with mixer 2, one-level shunt 3, one-level flow controller 4, first convergence device 5, two-step throttle device 10, second convergence device 11 and divergent nozzle 12 on flowing through the main line of downstream pipeline 13 successively; After one-level shunt 3, also isolate a bye-pass; On this bye-pass, be serially connected with secondary shunt 6 and separator 7 successively; After separator 7, isolate liquids and gases two bye-passes; Two bye-passes insert second convergence device 11 on the main line respectively, on two bye-passes, are respectively arranged with fluid flowmeter 8 (such as liquid Venturi meter etc.) and gas flowmeter 9 (such as gas Venturi meter etc.); After secondary shunt 6, also isolate a bye-pass and insert first convergence device 5 on the main line.
Said mixer 2 is a negative throat noz(zle), two-phase fluid is quickened therein and mixes, and the flow velocity back that raises just forms the annular flow of symmetry.
The multiphase flow method of measurement comprises the steps:
1) mixes through 2 pairs of heterogeneous fluids 1 of mixer and quicken, form the annular flow of symmetry;
2) one-level shunting:
The annular flow of symmetry gets into one-level shunt 3; The independent runner of 16 symmetrical distributions that comprised in the shunt is divided into 16 strands of on all four little a fluid streams; Get its interval and be one the tunnel (account for 4/16 of total discharge, promptly 25%) for uniform four strands, make its secondary shunt 6 of flowing through; Other 12 strands are one the tunnel (account for 12/16 of total discharge, promptly 75%), make its one-level flow controller 4 of flowing through successively, first convergence device 5, two-step throttle device 10 and second convergence device 11, through divergent nozzle 12 to downstream pipeline 13;
One-level flow controller 4 is restricting orifice with two-step throttle device 10, and effect is to produce certain pressure to fall, with the resistance of regulating loop; First convergence device 5 and second convergence device 11 are and converge threeway.
3) secondary shunting:
The independent runner of 16 symmetrical distributions that the fluid of secondary shunt 6 of flowing through is comprised in the shunt is divided into 16 strands of on all four little a fluid streams; Getting its interval is one the tunnel for uniform four strands; Make its separator 7 of flowing through, separated device 7 separates into flow of liquid and gas stream, after being measured by fluid flowmeter 8 and gas flowmeter 9 respectively again; Second convergence device 11 on the inflow main line arrives downstream pipeline 13 through divergent nozzle 12 after converging with the fluid on the main line; Other 12 strands is one the tunnel, and the fluid on its flow through first convergence device 5 and main line is converged.
Claims (6)
1. multiphase flow metering system is characterized in that: on heterogeneous fluid is flowed through the main line of downstream pipeline, be serially connected with mixer, one-level shunt, one-level flow controller, first convergence device, two-step throttle device, second convergence device and divergent nozzle successively; After the one-level shunt, also isolate a bye-pass; On this bye-pass, be serially connected with secondary shunt and separator successively; After separator, isolate liquids and gases two bye-passes; Two bye-passes insert second convergence device on the main line respectively, on two bye-passes, are respectively arranged with fluid flowmeter and gas flowmeter; After the secondary shunt, also isolate a bye-pass and insert first convergence device on the main line.
2. multiphase flow metering system according to claim 1 is characterized in that: said fluid flow is counted the liquid Venturi meter; Said gas flow is counted the gas Venturi meter.
3. multiphase flow metering system according to claim 1 is characterized in that: said mixer is a negative throat noz(zle).
4. multiphase flow metering system according to claim 1 is characterized in that: said one-level flow controller and two-step throttle device are restricting orifice.
5. multiphase flow metering system according to claim 1 is characterized in that: said first convergence device and second convergence device are and converge threeway.
6. a method of utilizing the described multiphase flow metering system of claim 1 to carry out the multiphase flow metering is characterized in that: comprise the steps:
1) through mixer heterogeneous fluid is mixed and quicken, form the annular flow of symmetry;
2) one-level shunting:
The annular flow of symmetry gets into the one-level shunt, and the independent runner of 16 symmetrical distributions that comprised in the shunt is divided into 16 strands of on all four little a fluid streams, and getting its interval is one the tunnel for uniform four strands, makes its secondary shunt of flowing through; Other 12 strands is one the tunnel, makes its one-level flow controller of flowing through successively, first convergence device, two-step throttle device and second convergence device, arrives the downstream pipeline through divergent nozzle;
3) secondary shunting:
The independent runner of 16 symmetrical distributions that the fluid of secondary shunt of flowing through is comprised in the shunt is divided into 16 strands of on all four little a fluid streams; Getting its interval is one the tunnel for uniform four strands; Make its separator of flowing through, separated device separates into flow of liquid and gas stream, more respectively by after fluid flowmeter and the gas flowmeter metering; After second convergence device on the inflow main line and the fluid on the main line converge, arrive the downstream pipeline through divergent nozzle; Other 12 strands is one the tunnel, and the fluid on its flow through first convergence device and main line is converged.
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| CN2011102610997A CN102392939A (en) | 2011-09-06 | 2011-09-06 | Multiphase flow metering system and method |
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Citations (8)
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| US20070114023A1 (en) * | 2005-11-03 | 2007-05-24 | Roy Jude B | Gas lift flow surveillance device |
| CN101509795A (en) * | 2008-02-15 | 2009-08-19 | 天津瑞吉德科技有限公司 | On-line instant measuring method and apparatus for oil-gas-water three phase flow quantity |
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| CN202252857U (en) * | 2011-09-06 | 2012-05-30 | 中国石油集团工程设计有限责任公司 | Multiphase fluid measuring system |
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| CN2349553Y (en) * | 1998-07-28 | 1999-11-17 | 窦剑文 | Gas-liquid polyphase flow flowmeter |
| CN1228528A (en) * | 1998-12-30 | 1999-09-15 | 西安交通大学 | Divided-flow split-phase type two-phase fluid flow measuring method |
| CN2356321Y (en) * | 1998-12-30 | 1999-12-29 | 西安交通大学 | Shunting split-phase two phase fluid flow meter |
| US20070114023A1 (en) * | 2005-11-03 | 2007-05-24 | Roy Jude B | Gas lift flow surveillance device |
| CN101509795A (en) * | 2008-02-15 | 2009-08-19 | 天津瑞吉德科技有限公司 | On-line instant measuring method and apparatus for oil-gas-water three phase flow quantity |
| US20100011876A1 (en) * | 2008-07-16 | 2010-01-21 | General Electric Company | Control system and method to detect and minimize impact of slug events |
| CN201306167Y (en) * | 2008-12-03 | 2009-09-09 | 湖北江汉石油仪器仪表有限公司 | Multiphase flow metering system |
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Application publication date: 20120328 |