CN202854065U - Device for measuring oil-water-gas multi-phase flow holdup on line - Google Patents
Device for measuring oil-water-gas multi-phase flow holdup on line Download PDFInfo
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- CN202854065U CN202854065U CN 201220420542 CN201220420542U CN202854065U CN 202854065 U CN202854065 U CN 202854065U CN 201220420542 CN201220420542 CN 201220420542 CN 201220420542 U CN201220420542 U CN 201220420542U CN 202854065 U CN202854065 U CN 202854065U
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Abstract
The utility model relates to a device for measuring oil-water-gas multi-phase flow holdup on line. The device comprises a main control computer, a gas-liquid holdup testing system and a water-oil holdup testing system, and a gas-liquid separating device arranged between the gas-liquid holdup testing system and the water-oil holdup testing system. With the adoption of the method provided by the utility model, not only can the problem that a sample to be measured severely corrodes measurement equipment be solved, but also the radiation protection can be realized. The high accuracy still can be kept in a condition with high air content, high-condensation-point crude oil and high flow rate, so that the reliability of a testing result can be improved. The device is tightly adhered to a pipeline, so that the occupied space is small; and the automatic measurement can be realized, and the worker has no need of being on duty.
Description
Technical field
The utility model belongs to multiphase flow metering, fields of measurement, is specifically related to a kind of device for each phase content of on-line measurement oil-water-gas multiphase flow Oil, Water, Gas.
Background technology
In recent years, along with customer demand and petroleum industry production and the lifting that transports condition, the production, teaching ﹠ research level of oil-water-gas multiphase flow amount meter is all improving constantly.The user has had requirements at the higher level to the stable accurate quantification monitoring that oil gas water contains rate.From the crude oil that oil mining goes out, be the potpourri that the multiphase mediums such as oil, water, rock gas form, processing this potpourri at first will carry out gas-liquid separation, and remaining oil mixing with water liquid obtains the very low product oil of water percentage and carries out outer defeated or sale after processed.In a series of activities in production such as crude oil gas-liquid separation, processed, that need to grasp timely and accurately each phase material in the crude oil contains rate situation and flow, so that the production control process guarantees to produce qualified finished product crude oil.Therefore, each phase content index of crude oil is important parameter in petrochemical industry petroleum collection, refinement and the transportation, crude oil is carried out accurate on-line measurement important role in crude production, trade of oil, gas, water three-phase.
At present in the ripe profit two-phase flow measurement technology, the method of measuring crude oil water content mainly contains following several: manually distill assay method, microwave method (or radio frequency method) (as: CN1112677), capacitance method (as: CN1186236), heat conduction method (as: CN1259671), vibration densimeter method (as: CN1789969, CN2359692) and rays method (as: CN86105543A, CN2359692Y, CN1086602A, CN2383068Y).The various measuring methods of except rays method other, all belong to contact type measurement, because crude oil corrosivity is stronger, fouling, wax deposition are serious, and common used material is had obvious corrosion, the pipe interior temperature is higher in addition, pressure is very large, and these have all proposed higher requirement, contact instrument long-time running poor reliability to the rotproofness of contact devices, heat resisting and pressure resisting etc., contact instrument all can't be eliminated the impact that gassiness brings measurement of water ratio in addition, thereby causes larger measuring error.
Tradition three phase metering method, no matter be on-line measurement, or the part separate type that advanced promoting the circulation of qi liquid two is separated is measured (such as CN200720032795, CN200920032689), measure for each phase content, all be to adopt volumetric method, densimetry, rays method, differential pressure method to measure the gas phase content, further calculate the ratio of fuel-displaced and water in conjunction with electric capacity, density, microwave method, differential pressure method or rays method.More than contain the rate test except rays method, all belong to contact measurement, and traditional rays method utilization
241Am,
133Ba,
137The gamma-rays that the radioactive sources such as Cs send, energy is single, the radiation hazard sustainable existence, and have the operational risk in storage source, when falling the source.
The utility model content
For above problem, the utility model provides a kind of employing X-ray energy spectrum as detectable signal, utilizes the Oil, Water, Gas different medium absorption of the energy signal principle different with scattering coefficient to be measured the device of each phase content of Oil, Water, Gas in the polyphasic flow.
The utility model is realized above-mentioned technical purpose by following technological means.
A kind of on-line measurement oil-water-gas multiphase flow contains the device of rate, comprise that main control computer, gas-liquid contain the rate test macro and water oil contains the rate test macro, described gas-liquid contains the rate test macro and comprises the first generator controller, the first X-ray generator, the first detector, described the first generator controller is electrically connected by the main control computer Long-distance Control and with the first X-ray generator, described the first detector links to each other with main control computer, and described the first X-ray generator and the first detector place respectively the both sides of the first pipeline; Described water oil contains the rate test macro, comprise the second generator controller, the second X-ray generator, the second detector, described the second generator controller is electrically connected by the main control computer Long-distance Control and with the second X-ray generator, described the second detector links to each other with main control computer, and described the second X-ray generator and the second detector place respectively the both sides of second pipe; Described the first pipeline is connected with second pipe and described the first pipeline and second pipe are provided with gas-liquid separation device between mutually.
Preferably, between described the first X-ray generator, the first detector and the first pipeline, be provided with collimating apparatus between described the second X-ray generator, the second detector and the second pipe.
Preferably, described the first X-ray generator, the second X-ray generator are X-ray machine.
Preferably, described detector is a kind of in semiconductor detector, the scintillator detector.
The on-line measurement oil-water-gas multiphase flow that the utility model provides contains the device of rate, adopts X-ray generator as sender unit, and there are multiple action effect in the X ray and the material that send Continuous Energy.Adopt X-ray energy spectrum as detectable signal, utilize the Oil, Water, Gas different medium that the absorption of the energy signal principle different with scattering coefficient measured Oil, Water, Gas polyphasic flow content in the polyphasic flow.After the X-ray generator outage, will no longer produce X ray, namely no longer have harmfulness.The gas-liquid that described on-line measurement oil-water-gas multiphase flow contains the device of rate contains rate test macro and water oil and contains the rate test macro and all tightly depend on the pipeline, takes up space little.In measuring process, the staff can independently arrange control and data processing software, convenient adopt single-point, continuously, intermittence etc. various ways measure.And after the test procedure preservation of setting, namely can realize automatic measurement, need not the staff on duty.Described polyphasic flow contains in the rate measurement mechanism collimating apparatus is set, and X ray signal transmitting and receiving device all adopts collimation technique, has both guaranteed representativeness, the real-time of data, is convenient to again radiation protection.In addition, the assembling process that contains the device of rate at described on-line measurement polyphasic flow is got rid of electromagnetic interference (EMI), can improve system stability, and the reliability of test result is further enhanced.
Description of drawings
Fig. 1 is the principle schematic that the utility model on-line measurement oil-water-gas multiphase flow contains the method for rate.
Fig. 2 is the structural representation that the utility model on-line measurement oil-water-gas multiphase flow contains the device of rate
Fig. 3 is the trend map that the mass attenuation coefficient of the materials such as water, oil, methane changes with ray energy.
Fig. 4 is the calibration curve of the actual proportioning of blind sample test result and blind sample.
Fig. 5 is the result to the liquid phase measuring of the different oil-water ratios under a series of different quality height.
Among the figure: 1-the first X-ray generator, 2-the first detector, 3-the second X-ray generator, 4-the second detector, 5-gas-liquid separation device.
Embodiment
For clearer explanation the technical solution of the utility model, below in conjunction with specific embodiment and accompanying drawing the utility model is further described in detail.
The utility model on-line measurement oil-water-gas multiphase flow contains the method for rate, is based on light and propagates the Lambert law of following in material:
Wherein, I is emergent light intensity, I
0Be incident intensity, μ is the attenuation coefficient of light in material, has comprised scatter attenuation and attenuation by absorption, and l is light diffusion path length in material, μ
mBe the mass attenuation coefficient of light in material, ρ is material density, μ
m=μ/ρ.
Light also is a kind of electromagnetic wave, different material is different for the electromagnetic attenuation coefficient of different-energy, when electromagnetic wave process Oil, Water, Gas potpourri, the electromagnetic wave signal intensity that sees through can change along with the variation of Oil, Water, Gas three-phase ratio, thereby contains rate according to the mass/volume percentage that to received signal analytical calculation can obtain each phase material.The electromagnetic wave penetration capacity shorter owing to wavelength is stronger, so usually adopt X ray, gamma-rays as detectable signal.
Fig. 3 shows the mass attenuation coefficient μ of the materials such as water, oil, methane
mTrend map with ray (for example X ray, gamma-rays) energy variation.As shown in Figure 3, for materials such as water, crude oil and methane, when ray energy during less than 30keV, mass attenuation coefficient μ
mDiffer larger, and when ray energy between 50keV between the 90keV time, mass attenuation coefficient μ
mDifference reduce, ray energy is during greater than 90keV, mass attenuation coefficient μ
mBasic identical.
As shown in Figure 1 and Figure 2, the on-line measurement oil-water-gas multiphase flow that the utility model provides contains the device of rate, comprises that main control computer, gas-liquid contain the rate test macro and water oil contains the rate test macro.Described gas-liquid contains the rate test macro and comprises the first generator controller, the first X-ray generator 1, the first detector 2, described the first generator controller is electrically connected by the main control computer Long-distance Control and with the first X-ray generator 1, described the first detector 2 links to each other with main control computer, and described the first X-ray generator 1 and the first detector 2 place respectively the both sides of the first pipeline.Described water oil contains the rate test macro, comprise the second generator controller, the second X-ray generator 3, the second detector 4, described the second generator controller is electrically connected by the main control computer Long-distance Control and with the second X-ray generator 3, described the second detector 4 links to each other with main control computer, and described the second X-ray generator 3 and the second detector 4 place respectively the both sides of second pipe.Described gas-liquid contains the ratio that the rate test macro is used for measuring gas phase and liquid phase, and described water oil contains the rate test macro and is used for measuring ratio oily and water.Gas-liquid contains rate test macro and water oil and contains gas-liquid separation device 5 is installed between the rate test macro, is used to water oil test macro that test sample book is provided.Concrete, gas-liquid separation device 5 be arranged on that described the first pipeline is connected with second pipe and described the first pipeline and second pipe between.
On-line measurement oil-water-gas multiphase flow described in the utility model contains in the device of rate, and described the first X-ray generator 1, the second X-ray generator 3 adopt the high pressure ray generator, such as III class radiation appliances such as X-ray machines.Described detector is semiconductor detector or scintillator GOS linear array detector.
Further, for representativeness, the real-time that guarantees measured data, and raising is to the radiation protection of X ray, X ray signal transmitting and receiving device all adopts collimation technique, between described the first X-ray generator 1, the first detector 2 and the first pipeline, be provided with collimating apparatus between described the second X-ray generator 3, the second detector 4 and the second pipe.The sheet lead casing is set as shielding case body parcel X ray passage, namely described gas-liquid contains the rate test macro and water oil contains the rate test macro.
The device that utilizes on-line measurement oil-water-gas multiphase flow described in the utility model to contain rate carries out polyphasic flow when containing rate and measuring, main control computer Long-distance Control the first generator controller and the second generator controller, make the first X-ray generator 1 and the second X-ray generator 3 launch respectively the above X ray of 100keV and the following X ray of 65keV, main control computer draws the ratio of ratio, oil and the water of gas phase and liquid phase according to the outgoing X ray data that the first detector 2 and the second detector 4 receive, and calculates each phase content.
Below enumerate and utilize device described in the utility model to carry out process and result that polyphasic flow contains the rate measurement.
(1) utilizing water oil to contain the rate test macro measures oil and water two phase contents
Transmission pressure 0.1MPa in the pipeline, 40 ℃ of temperature; Pipe interior all is the liquid phase that carbohydrates and water consist of without gas.The tube voltage that X-ray machine is set is 60KV, and tube current is 0.5mA, 3ms integral time of scintillator GOS linear array detector, and internal diameter of the pipeline 80mm, X-ray machine and detector that gas-liquid contains the rate test macro are in closed condition.
Table 1 two-phase is demarcated and blind sample test result
11 standard models from pure water to pure oil have been carried out oil measured with water two phase contents, measurement result sees Table 1.Measurement result is carried out statistical fit, made linear match to 5 curves, Comprehensive Assessment precision and simplification, 3 times curve is comparatively suitable, and the gained polynomial expression is:
y＝241.53454-9.28003x-0.09976x
2-0.000291071x
3
Wherein, y is oil content, and x is the measured signal value of penetrating X ray.
Demarcate completely, the sample of known proportioning is tested as blind sample, tested altogether pure water to 8 blind samples between single oil area, the measurement result of each sample is as the criterion with the mean value of measured result in 1 minute.Statistical measures is as shown in table 1, and the calibration curve of the result that blind sample is tested and the actual proportioning of blind sample as shown in Figure 4.
Find out from the result, in low petroliferous province, measured value is a little less than actual value (being actual proportioning), and in middle high petroliferous province, a little higher than actual value of measured value is no more than 1% according to the measurement result absolute error of calibration curve.This product kinetic measurement resolution to 5 ‰.
(2) the Oil, Water, Gas gas holdup is measured
Pipeline transmission pressure 0.1MPa, 40 ℃ of internal temperatures, sample introduction trunk line and gas-liquid separation device 5 bottom pipe internal diameter 80mm.
The parameter that gas-liquid contains the rate test macro is set: the tube voltage of X-ray machine is 120KV, and tube current is 0.5mA; Be 3ms the integral time of the first detector 2.
The parameter that water oil contains the rate test macro is set: the tube voltage 60KV of X-ray machine, tube current 0.5mA; The second detector 3ms 4 integral time.
Gas-liquid contains that the rate test macro has measured 6,7,8,9, the sample of five quality height of 10cm, and the signal value of the outgoing X ray that the first detector 2 records is as shown in table 2.
The signal value of the outgoing X ray that table 2 the first detector records
| Quality height (cm) | 6 | 7 | 8 | 9 | 10 |
| Signal value | 207.25 | 192.75 | 162.25 | 138.5 | 115.25 |
Result according to the data linear fit is:
y=14.85-x/23.825
Wherein, y is the quality height, and x is the first detector 2 measured signal values to the outgoing X ray.
Utilize water oil to contain the rate test macro to same quality height, the sample of different oil-water ratios is tested, and has measured 6,7,8,9, five quality height of 10cm, and the rule result that the second detector 4 obtains deal with data as shown in Figure 5.
Demarcate completely, come the correctness of check algorithm with the blind sample of the ratio of unknown quality, unknown profit.Experiment has gathered eight groups of data altogether, reads in to obtain result shown in the table 3 after eight groups of data are processed.
The blind sample test result of table 3 three-phase
| Numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| |
0.4434 | 0.4693 | 0.5359 | 0.4569 | 0.5458 | 0.5343 | 0.5157 | 0.6447 |
| |
117.25 | 119.75 | 125.25 | 167 | 171.25 | 204.25 | 234 | 234.5 |
| Detect thickness (cm) | 9.9287 | 9.8238 | 9.5929 | 7.8406 | 7.6622 | 6.2771 | 5.0284 | 5.0074 |
| Actual (real) thickness (cm) | 10 | 10 | 10 | 8 | 8 | 7 | 6 | 6 |
| Measure oil content | 35% | 45.0% | 81.6% | 7% | 63% | 25% | 4% | 65% |
| Actual oil content | 30% | 50% | 80% | 10% | 60% | 30% | 0% | 70% |
From the result analysis, to measure for gas holdup, the relative error of void fraction is the highest by approximately 16.5%, and oil-containing/moisture absolute error is the highest by 5%, and precision is better than in the industry 7% error level.
The above only is better embodiment of the present utility model, is not to limit practical range of the present utility model; In the situation that do not deviate from the utility model spirit and technical scheme thereof, those skilled in the art is every to make various corresponding improvement, replacement or modification according to the utility model content, all belongs to protection domain of the present utility model.
Claims (4)
1. an on-line measurement oil-water-gas multiphase flow contains the device of rate, it is characterized in that, comprise main control computer, gas-liquid contains the rate test macro and water oil contains the rate test macro, described gas-liquid contains the rate test macro and comprises the first generator controller, the first X-ray generator (1), the first detector (2), described the first generator controller is by the main control computer Long-distance Control, and be electrically connected with the first X-ray generator (1), described the first detector (2) links to each other with main control computer, and described the first X-ray generator (1) and the first detector (2) place respectively the both sides of the first pipeline; Described water oil contains the rate test macro, comprise the second generator controller, the second X-ray generator (3), the second detector (4), described the second generator controller is electrically connected by the main control computer Long-distance Control and with the second X-ray generator (3), described the second detector (4) links to each other with main control computer, and described the second X-ray generator (3) and the second detector (4) place respectively the both sides of second pipe; Described the first pipeline is connected with second pipe and described the first pipeline and second pipe are provided with gas-liquid separation device (5) between mutually.
2. on-line measurement oil-water-gas multiphase flow according to claim 1 contains the device of rate, it is characterized in that, between described the first X-ray generator (1), the first detector (2) and the first pipeline, be provided with collimating apparatus between described the second X-ray generator (3), the second detector (4) and the second pipe.
3. on-line measurement oil-water-gas multiphase flow according to claim 1 contains the device of rate, it is characterized in that, described the first X-ray generator (1), the second X-ray generator (3) are X-ray machine.
4. on-line measurement oil-water-gas multiphase flow according to claim 1 contains the device of rate, it is characterized in that, described detector is a kind of in semiconductor detector, the scintillator detector.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879410A (en) * | 2012-08-22 | 2013-01-16 | 北京乾达源科技有限公司 | Method and device for measuring water and gas multiphase flow content in oil on line |
| CN117434084A (en) * | 2023-12-06 | 2024-01-23 | 四川万圣通实业有限公司 | Digital detection device and detection method for steel pipe |
-
2012
- 2012-08-22 CN CN 201220420542 patent/CN202854065U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879410A (en) * | 2012-08-22 | 2013-01-16 | 北京乾达源科技有限公司 | Method and device for measuring water and gas multiphase flow content in oil on line |
| CN117434084A (en) * | 2023-12-06 | 2024-01-23 | 四川万圣通实业有限公司 | Digital detection device and detection method for steel pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20150822 |
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| EXPY | Termination of patent right or utility model |