CN101241121A - Timing method three phase metering separator - Google Patents
Timing method three phase metering separator Download PDFInfo
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- CN101241121A CN101241121A CNA2007100730786A CN200710073078A CN101241121A CN 101241121 A CN101241121 A CN 101241121A CN A2007100730786 A CNA2007100730786 A CN A2007100730786A CN 200710073078 A CN200710073078 A CN 200710073078A CN 101241121 A CN101241121 A CN 101241121A
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- water
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Abstract
A separator capable of measuring three phase of oil, gas and water in-phase is provided. In the process of measuring, only three time parameters displayed by three level gauge are marked and the measure of oil, gas and water is finished without using other specialties instrument. Weigh (ton) and volume (square) are obtained in-phase by time measuring of constant altitude of level gauge of mix solution and corresponding column level gauge, and the parameter Rho mix=t1/t2*Rho water which is most difficult to calculate by consistency method for measuring water content is obtained and the content of water is calculated conveniently. The gas production is measured by zero position gauge timing of emission chamber, and the timing method of oil, gas and water is obtained. Three-chamber structure, pull rod valve, pneumatic valve and electromagnetic valve are combined with measuring signal, the switch of series measure is finished by self energy, and the frock match and cost of three-phase measure are simplified. In addition, many infection factors of water content measuring of consistency method is eliminated in technics and precision of water content measuring is ensured.
Description
One technical field
Present technique invention relates to a kind ofly can carry out the novel metering separator of synchronous measurement, and it be supporting to need not other special instrument again to the profit gas three-phase flow body of oil well output.
Two background technologies
The existing metering separator in domestic oil field can only be to the metering of oil-water mixture output (unit, ton).Gas production rate is measured with flowmeter or with fluid-discharge therapy, and the moisture method of artificial spot sampling and chemical examination that then adopts is measured.Because artificial sample representative poor (week, ten days) is increasing by the error in dipping that moisture metering causes entering high water-cut development after the stage, become the difficult problem of field produces metering.To the high water-cut development stage, gas production rate descends significantly, and gas production rate obvious difference between well, flowmeter can not guarantee that every mouthful of well is all rationally measuring in the range, and fluid-discharge therapy is surveyed gas because of the manually-operated difficulty is big, calculation of complex is seldom used.Indivedual oil fields and block because of gas production rate very little, after liquid producing amount measure finished, discharge opeing is difficulty very, had seriously influenced the normal metering of production fluid amount.This contradiction is along with the progressively arrival of development late stage, and more and more significantly extension.Three parameters meterings of production fluid amount, water percentage, gas production rate are in various degree existing problems all.The oil field press for a kind of can economy and durability, the oil gas water three phase fluid is carried out the method and the technology of synchronous measurement.
The core technology difficult problem of oil-gas-water three-phase metering is the metrology and measurement to water percentage.Research department vast inside and outside this oil field is is successively researched and developed out polytype moisture method of testing, for example: ultrashort wave (USW) method, microwave method, radio frequency method, rays method and densimetry etc.But owing to cost an arm and a leg, complete sets of Techniques complexity and probe incrustation signal decay, need specialized factory regularly to clean, or factor such as radioactive contamination is arranged, application is restricted, the online enquiries Water Content in Oil, three phase metering, densimetry is surveyed the moisture information that will find to have or not several this respects.Numerous able person honest patriots such as professor, dictorial advisor even the academician of the Chinese Academy of Engineering of numerous research department, new and high technology producer and oil universities and colleges, researcher are paying close attention to this problem inside and outside the oil field, and have had the patented technology achievement and the product of part.It is to utilize the density difference of oil and water to calculate moisture a kind of method that densimetry is surveyed moisture.Densimetry is surveyed moisture principle all introduction in the oil specialized teaching material.It has a computing formula:
W in the formula
GBe mixed liquor weight per cent moisture, ρ
OilAnd ρ
WaterFor the oil and the density of water in the mixed liquor are known, it is a constant substantially to a block or a bite individual well, and the year variation is very little.ρ
MixBe the average density of oil-water mixture, unknown and wait to ask.As long as obtain ρ accurately
MixJust can calculate water percentage easily.ρ
MixAcquiring method be that densimetry is surveyed moisture gordian technique.The inside and outside numerous research department in oil field once adopted multiple new and high technology method to ask for for these years, example electronic densitometer and vibrating tube densimeter method dual liquid columns height method, dual liquid columns elementary errors platen press, ask for etc. multiple new and high technology method, the American asks for mixed liquor density and water percentage with mass flowmeter and volumetric displacement meter tandem compound.The complete sets of Techniques complexity, the cost costliness is used limited.
The patent achievement of the three-phase synchronous measurement of oil gas water, its common trait are exactly to select the supporting different water percentage and the measuring instrument of gas production rate on the basis of gas-oil separation separately.Even if it is moisture all to adopt densimetry to survey, but the acquiring method of the density of mixed liquor is also different separately, their all call oneself so-and-so three phase metering device or systems from existing patent achievement.The complicated cost costliness of complete sets of Techniques, this principal element have limited in the three phase metering that these achievements seldom are applied to oil field individual well and have gone.
Three summary of the invention
At the problems referred to above, it is simple, with low cost that the present technique invention will be sought out complete sets of Techniques exactly, and operating maintenance is convenient, can be widely applied to the three phase metering technology of millions of mouthfuls of oil wells.
The present technique invention is to utilize the method for timing to realize the oil gas water three phase synchronous measurement.Its maximum feature is: only keep three time parameters in mind in the three-phase fluid of oil well output enters the metering process of this metering separator, just can realize production fluid amount, water percentage, three parameter synchronization automatic gauges of gas production rate, and it is supporting to need not to carry out other measuring instrument again.Compare with similar technological achievement, it is simple to have a measuring principle, and process structure is directly perceived, advantage with low cost.
(1) measuring principle of water percentage and production fluid amount:
The present technique invention adopts densimetry to survey water percentage.Its key parameter ρ
MixAcquiring method be exactly to utilize the conventional metering method of oil field in usefulness, two liquid level gauge H that highly equate are installed in same measuring container
1And H
2Weight (ton) and volume (side) to the production fluid amount measures synchronously, asks for ρ
MixThat is:
Long-pending (the M in effective cross section in the S------measuring container in the formula
2)
H
1--the setting height(from bottom) (M) of----mixed liquor liquid level gauge
H
2The liquid level gauge setting height(from bottom) (M) of the corresponding water column of-----mixed liquor
t
1--bottom,----mixed liquor self-measuring chamber rises to H
1The required time (S)
t
2--bottom,----water column liquid level self-measuring chamber rises to H
2The required time (S)
ρ
Water--------density (T/M of water in the mixed liquor
3)
One day second number (S) of 86400-----
ρ so
Mix=Q
g/ Q
v* 100% result of calculation has two kinds:
(1) if setting-up time, i.e. t
1=t
2ρ then
Mix=H
2/ H
1* ρ
Water
(2) if setting height, i.e. H
1=H
2ρ then
Mix=t
1/ t
2* ρ
Water
Scheme (1) is dual liquid columns height method or dual liquid columns elementary errors platen press, the complicated cost height of complete sets of Techniques.It can not include the chronometry metering system on the other hand.
Present technique is taked (2) scheme:
Be H
1=H
2ρ
Mix=t
1/ t
2* ρ
Water-------------------4.
4. formula is the ρ of present technique invention
MixAcquiring method.4. the substitution formula is 1. with formula
5. formula is the moisture computing formula of densimetry of present technique invention.
5. can find out that its influence factor has only ρ from formula
Oil, ρ
Water, t
1, t
2Four parameters, wherein ρ
OilAnd ρ
WaterTwo parameters are known and as can be known, and a block or a bite individual well be can be considered constant, and year changes very little.But must demarcate chemical examination every year.On-the-spot value can be carried out the temperature correction according to scene temperature.
t
1Influence factor more, mainly be the influence of eliminating the solution gas in the oil, the micro-bubble that example is being overflowed and at the foam at top, the fluctuation of liquid level, crude oil must fully outgas to the stiction of liquid level gauge etc.
t
2Correct indicating value also can be subjected to the influence of liquid stream mobilization force, this is the link of being ignored by people easily.In a word, t
1, t
2The influence factor of two parameters is a lot, and it is to be related to densimetry to survey the moisture success or failure and the key of measuring accuracy.These influence factors must go to reduce or eliminate in technological design to greatest extent.(seeing embodiment for details)
(2) gas production rate test and measuring principle and computing formula
Utilize the existing fluid-discharge therapy in oil field to survey the gas technology and survey gas, under these process conditions:
Each metering weight of mixed liquor is later fixed: q
g=S*H* ρ
Water(ton)
Its corresponding volume is:
According to this known volume and the required time t of emptying
3(seeing five embodiments), obtain the daily output cumulative volume amount of total drain age velocity of three-phase fluid and three-phase fluid:
The daily output liquid volume that had measured
(annotate H=H
1=H
2)
6. formula is the computing formula of the fluid-discharge therapy survey gas under these process conditions.
Can clearly see 6. from formula and fuel-displaced, gas, water three phase metering to be one organically metering is whole, three measuring parameter t
1t
2t
3Influence each other,
Ratio determined the height of water percentage,
Ratio determined the size of gas production rate, work as t
1=t
2The time then moisture 100%, work as t
2=t
3Shi Ze is also produce oil just not of aerogenesis not.Under these process conditions, be that fluid-discharge therapy is surveyed the optimal test mode of gas technology.Can replace gas flow measuring gas, not have limit of range.
Four description of drawings
This three phase metering separator mainly consist of the following components (seeing the process structure schematic diagram for details):
(0) timing control processor (1) (2) magnetic valve (3) pneumatic operated valve
(4) splash down slippage dish (5) separation chamber (6) gas balance pipe
(7) isolation buffer cover (8) H1Liquid level is taken into account Fu Shuibao
(9)H
2Liquid level is taken into account respiratory siphon (H1＝H
2) (10) measuring room (11) measuring room inlet tube
(12) gas balance and overflow pipe (13) pull bar valve (14) water bag (15) drain chamber
(16) main entrance pipe (17) H3Zero-bit liquid level gauge (18) emptying calibrate valve (19) general export valve
Five embodiments
Metering process and each functions of components and design concept are as follows in conjunction with producing:
The three-phase fluid of oil well output enters separation chamber (5) through main entrance pipe (16), the multistage slippage dish (4) that splashes down is installed on the top of separation chamber, oil gas splashes down stirring, slippage, exposure it is fully outgased through multistage, after isolation buffer cover (7) stirs the degassing and gravity segregation once more again by the bottom of (7), enter measuring room (10) through feed tube (11) by the measuring room bottom, liquid level is steadily risen from bottom to top, prevented the misoperation of the caused liquid level gauge of liquid fluctuating (8).Contraposition meter (8) has been taked pair water bag quarantine measures, has prevented that liquid level gauge (8) is malfunctioning by crude oil viscous and action.Arrive H when mixing liquid level
1The time timing t
1The water of liquid level gauge (9) is wrapped into mouth has also increased the isolation buffer measure, and the mobilization force that reduces liquid stream influences it.Timing t when the water column liquid level arrives (9)
2Electric signal is connected solenoid valve (1) and is opened exhaust emptying simultaneously, pneumatic valve (3) is under working pressure (0.2-1.5mpa) effect of separation vessel, make to push away on it and drive pull bar valve (13) simultaneously, open the measuring room outlet, at once discharge opeing enters drain chamber (15), and pull bar valve (13) has been sealed the measuring room inlet tube simultaneously, stops feed liquor.In the time of measuring room discharge opeing, the three-phase fluid that oil well continues output is temporary in separation chamber (5), after the discharge opeing time-delay finishes, solenoid valve (1) outage automatically cuts out, electric signal is connected solenoid valve (2) unlatching at once simultaneously, makes pressure balance on the pneumatic piston, falls after rise under the effect of pull bar valve deadweight, close the measuring room outlet and open the inlet feed liquor simultaneously, begun metering circulation next time again.Mixed liquor after the metering spews out into drain chamber (15), makes zero-bit meter H at once
3(17) action picks up counting, and the gas in the drain chamber is displaced to measuring room (10) through balance pipe (12).(H
3Setting height(from bottom) equate with the general export height of separation vessel) continue at oil well under the effect of three-phase fluid total amount of output, the mixed liquor of drain chamber known volume amount is arranged is into gone in the gathering network, the timing of zero-bit meter finishes and timing t after emptying
3So far just finished a metering process of oil gas water three phase fluid.If continuous measurement n time then three time parameter arithmetic mean is respectively t
1t
2t
3, then can finish calculating according to correlation formula and program to production fluid amount, water percentage, gas production rate.
In view of t
1And t
2Influence factor can only reduce and can not eliminate, have an error so test and measuring is moisture, can be again according to the artificial calibration value in scene, again to H
1(t
1) or H
2(t
2) finely tune.
Carried out simple laboratory experiment before the experiment at the scene, the checking chronometry is surveyed moisture principle and measuring accuracy.Laboratory experiment is to be undertaken by artificial proportioning moisture (2-98%) with diesel oil and water.The water percentage that calculates is very identical with artificial proportioning water percentage, and high moisture (greater than 90%) relative error is 0.2-0.5%.Low moisture error is 1-3%.Along with the reduction of water percentage, error increases to some extent, may be simple and crude with experiment condition not relevant only with diesel oil deposition dehydrating that recycle.
(1) on-the-spot preliminary experiment condition
Field experiment is the high water-cut development block in Westbound, oil recovery factory, Jilin Oil Field Fuyu County, and the experiment later stage is just being met the ending stage of oil field, Fuyu County workflow reengineering, and the duration is urgent.These two seasons of autumn in well group summer are that normal temperature is carried, and the oil temperature that enters the station 20 degree Celsius can not measure.Hot water have to be mixed separation vessel and carry out water mixing metrology and measurement (water mixing dry-pressing and temperature are all unstable), not go up the water mixing measuring instrument, regulate flow and temperature by the open degree of needle valve.ρ
WaterAnd ρ
OilValue use the historical data of Westbound.Satisfied experimental data is enrolled also only more than ten day, because the duration is urgent, also experimental data is not carried out the test of artificial on-site proving contrast and gas production rate, is very much sorry.
(2) to the analysis and the understanding (seeing the field experiment tables of data) of field experiment data:
The A experimental data is the continuous several days experimental data of T16 well, so that comparative analysis.The t of every group of data
1And t
2Be the inferior arithmetic mean of halfhour n (8-18), all the other each parameters are according to t
1And t
2Two parameters and known other parameter are calculated.
B finds out from the experimental data contrast of this array:
Although at different date and times, watering quantity is not of uniform size, all the parameter of being kept in mind be difference to some extent all, and the last daily oil production that per cent moisture calculated according to total liquid measure (watering quantity+production fluid amount) and correspondence is basicly stable.Although manually demarcate as yet, daily oil production is not to be actual value, can see the condition of production of producing well and the stability of present technique substantially with these data.
C later data on the 15th are intentionally to H
2(t
2) height finely tune, daily oil production is changed to some extent, be very sensitive.If adjust according to artificial nominal data again, find out the debugging rule, be the moisture detection of dynamic that can be used for oil well (or main line) fully.
Six beneficial effects
Because the measuring principle and the process structure of timing method three phase metering separator are very simple, directly perceived, its cost of manufacture is cheap, except that separator main body, the supplementary technology accessory is few and inexpensive, durable, with low cost, this is to compare maximum advantage with other three phase metering device or system, being convenient to large scale application, is that the ideal of field produces metering substitutes measurement technology.
Its large scale application can make:
(1) the production error in dipping in oil field is reduced significantly, to Oilfield developing, production, adjust, tap the latent power, many-sided meaning such as management is very far-reaching.
(2) can finish the history of artificial sample in decades and chemical examination, save great amount of manpower and material resources, be convenient to the collection of field produces datamation.
(3) because to latter period of oilfield development, gas production rate descends significantly, existing part oil field or block can not be surveyed gas, even discharge opeing is all very difficult behind the liquid producing amount measure.Can solve these two difficult problem present technique.
(4) be applicable to the individual well of water mixing or not water mixing flow process or the three phase metering of many wells main line, also can carry out the profit two-phase flow measurement RTC unloading.
(5) make things convenient for because measuring principle is simple, and process structure is directly perceived, and the technology accessory is common, inexpensive, durable, maintenance workload is little, each oil field professional can safeguard debugging voluntarily.Annotate: this major technique was once quoted in 02 year, and application number 02153983.9 on business formula is lost a ρ
WaterExamination as to substances is not passed through.
Subordinate list
The different watering quantity field test data of T16 well individual well table
Annotate: probe temperature 40-43 ℃ of Δ t=t
2-t
1
ρ
Mix=t
1/ t
2* ρ water ρ
Oil=0.85g/cm
3ρ
Water=1.0g/m
3
31: the weight of each metering, units
Claims (3)
1. be in a kind of metering process of the three-phase fluid to the oil well output, only keep three time parameters in mind, just can finish three phase metering separator, and it is supporting to need not other special instrument again the synchronous measurement test of oil gas water three phase fluid.
2. according to claim 1, the feature of timing method three phase metering separator is H
1And H
2Two liquid level gauge equal altitudes are installed H
3Zero-bit install, realized two measurement units (ton and side) synchronous measurement to oil-water mixture output, survey the most difficult mixing average density ρ that asks of aqueous methods thereby derived densimetry
MixChronometry ask for and, simplified the supporting and expense of instrument frock of three phase metering greatly having finished test in the discharge process after the metering to gas production rate.
3. according to claim 1, it is characterized in that realizing: three cell structures by a multi-functional metering separator, pull bar valve (13), pneumatic valve (3), solenoid valve (1) (2), the organic assembling of metering signal (9) utilizes self-energy to finish the switching of continuous automatic gauge, and has eliminated densimetry and surveyed moisture multiple influence factor, has reduced the frock expense of three phase metering significantly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100730786A CN101241121A (en) | 2007-02-05 | 2007-02-05 | Timing method three phase metering separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100730786A CN101241121A (en) | 2007-02-05 | 2007-02-05 | Timing method three phase metering separator |
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| Publication Number | Publication Date |
|---|---|
| CN101241121A true CN101241121A (en) | 2008-08-13 |
Family
ID=39932812
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|---|---|---|---|
| CNA2007100730786A Pending CN101241121A (en) | 2007-02-05 | 2007-02-05 | Timing method three phase metering separator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500032A (en) * | 2014-12-15 | 2015-04-08 | 陕西延长石油（集团）有限责任公司西安精细化工厂 | Oil well test and control system |
| CN107503736A (en) * | 2017-09-30 | 2017-12-22 | 陈勇 | A kind of multistage separating single well metering device |
| CN109650319A (en) * | 2018-12-21 | 2019-04-19 | 中国石油工程建设有限公司华北分公司 | Low wet crude joins metering system |
| CN112855116A (en) * | 2021-01-06 | 2021-05-28 | 大庆丹诺石油科技开发有限公司 | Oil well oil-gas-water three-phase flow metering device and metering method |
| CN113376218A (en) * | 2021-06-08 | 2021-09-10 | 西安石油大学 | Oil-gas-water three-phase content integrated online measuring device in oil pipeline and using method |
-
2007
- 2007-02-05 CN CNA2007100730786A patent/CN101241121A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500032A (en) * | 2014-12-15 | 2015-04-08 | 陕西延长石油（集团）有限责任公司西安精细化工厂 | Oil well test and control system |
| CN104500032B (en) * | 2014-12-15 | 2018-05-08 | 陕西延长石油（集团）有限责任公司西安精细化工厂 | A kind of oil well test and control system |
| CN107503736A (en) * | 2017-09-30 | 2017-12-22 | 陈勇 | A kind of multistage separating single well metering device |
| CN109650319A (en) * | 2018-12-21 | 2019-04-19 | 中国石油工程建设有限公司华北分公司 | Low wet crude joins metering system |
| CN112855116A (en) * | 2021-01-06 | 2021-05-28 | 大庆丹诺石油科技开发有限公司 | Oil well oil-gas-water three-phase flow metering device and metering method |
| CN113376218A (en) * | 2021-06-08 | 2021-09-10 | 西安石油大学 | Oil-gas-water three-phase content integrated online measuring device in oil pipeline and using method |
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Open date: 20080813 |