CN101550822B - Method and device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields - Google Patents
Method and device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields Download PDFInfo
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- CN101550822B CN101550822B CN2008103008194A CN200810300819A CN101550822B CN 101550822 B CN101550822 B CN 101550822B CN 2008103008194 A CN2008103008194 A CN 2008103008194A CN 200810300819 A CN200810300819 A CN 200810300819A CN 101550822 B CN101550822 B CN 101550822B
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Abstract
The invention discloses a method and a device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields; under the condition of unchanged flow field of the water injection well, a plurality of measurements are conducted by changing the size of the sampling area of the water injection well, thus eliminating errors caused by the reason that self-parameters of a probe changes as the change of external conditions and improving the accuracy of flow rate test of the water injection well. The method and the device can ensure that within the permissible range of the ultrasonic flowmeter, the test result is not influenced by the change of self-parameters of the probe as the change of external conditions, and the accuracy of flow rate test is irrelevant to the factors such as pressure, temperature and the like, thus not only meeting the requirement of accurate test under high temperature and high pressure, but also being capable of further improving test accuracy and conducting high-accuracy test; the method used for testing is simple and effective, and easy to realize; and the device adopted has simple structure, low cost and good use effect.
Description
Technical field
The present invention relates to a kind of method and device that improves the layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy, belong to well testing technology technology and apparatus field.
Background technology
Along with comprehensive renewal of water injection well in oil fields traffic tester, many Novel down-hole flow meters are used in a large number, wherein ultrasonic flowmeter be exactly use wider a kind of.The size of the sample area that this flow meter is present is definite value, in arbitrary flow field, carries out proper testing, obtains test value Y, has following design formulas:
Y＝f
1(PT)+f
2(Q)……………………………………(1)
In the formula: f
1(PT) for test value is stressed, the situation of temperature effect, be the variation of ultrasonic probe self parameter; f
2(Q) be subjected to the situation of flow effect for test value; Because f
1(PT) can't determine, simultaneously because the most of water injection well in oil field is the normal temperature low pressure well, in these wells by f
1(PT) change the error of introducing less than 2% of full scale, so with f
1(PT) replace with constant D.Formula is rewritten into:
Q＝f
3(Y-D)……………………………………………(2)
Demarcate by ground, determine functional relation f
3Owing to have f in the calculating process
1(PT) with the substitutional relation of constant D, precision reaches 2% rear being difficult to and further improves.And when testing in high temperature, high-pressure well, error obviously increases, and can not satisfy the requirement of high precision measurement.
Summary of the invention
The object of the invention is to: provide a kind of and eliminate the impact that probe self parameter produces with change of external conditions, and then improve method and the device of flow meter stratified flow rate test accuracy.
The present invention is achieved in that and by changing the size of water injection well sample area, takes multiple measurements in the constant situation in water injection well flow field, and then eliminates the error that probe self parameter produces with change of external conditions, improves the water injection well accuracy of flow rate test.
The method of described raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy, the size that wherein changes the water injection well sample area are to realize by the relative position that changes between probe.
And the relative position between the change probe is to be undertaken by the position each other that changes one or more probes.
When realizing changing the relative position between probe, change by the air line distance that changes between probe, perhaps change by changing relative angle.
The device that the method adopts, it comprises mozzle (11), at mozzle (11) motor (1) is installed, the output shaft of motor (1) be connected with one can be in mozzle (11) base (7) of move left and right, left probe (9) is housed in base (7), and middle plug screw (10) compresses left probe (9), and pin (8) is pressed into mozzle (11), and snaps in the keyway of base (7) side; Mounting head (13) also is housed in mozzle (11), right probe (12) is housed in mounting head (13), and the fixing right probe (12) of right plug screw (14); Right probe (12) is connected with main frame (4), and main frame (4) is fixed in the mozzle (11).
Be more preferably, an end that is connected with motor (1) at base (7) is equipped with left plug screw (6).
Preferably motor (1) is carried out movable sealing with seal combination (2).
The lead-in wire of described right probe (12) passes in the side opening of mozzle (11), connects main frame (4) by sealing-plug (5).
Wherein main frame (4) is connected by screw (3) with mozzle (11).
Owing to adopted technique scheme, compared with prior art, the present invention can guarantee in the tolerance zone of ultrasonic flowmeter, make the result of test self parameter impact with change of external conditions of not popped one's head in, the factors such as flow rate test precision and pressure, temperature are irrelevant, both can satisfy the accurately requirement of test under high temperature, the condition of high voltage, can further improve measuring accuracy again, carry out high precision measurement, the method that test is adopted is simply effective, realizes that easily the measurement mechanism that adopts is simple in structure, with low cost, result of use is good.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention;
Reference numeral: the right plug screw of the right probe of plug screw 12-13-mounting head 14-among the left probe of the left plug screw 7-of the 1-motor 2-seal combination 3-screw 4-main frame 5-sealing-plug 6-base 8-pin 9-10-
The specific embodiment
Embodiments of the invention 1: improve the method for layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy, in the water injection well arbitrary flow field, carry out first proper testing one time, obtain test value Y
1, then in the constant situation in water injection well flow field, change the size of water injection well sample area, carry out again proper testing one time, obtain test value Y
2Can the following design formulas:
Y
1＝f
1(PT)+f
2(Q)……………………………………(3)
Y
2＝f
1(PT)+f
4(Q)……………………………………(4)
In the formula: f
1(PT) for test value is stressed, the situation of temperature effect;
f
2(Q) for a change before the sample area, test value is subjected to the situation of flow effect;
f
4(Q) for a change after the sample area, test value is subjected to the situation of flow effect;
Obtain formula (5) after the fortran, formula (5) is rewritten into formula (6), the functional relation in the formula is determined by demarcating.Can find out the function that does not comprise pressure, temperature in the formula (6), eliminate because change of external conditions cause popping one's head in self parameter changes impact on test result, improve test accuracy.
Y
1-Y
2＝f
2(Q)-f
4(Q)…………………………………(5)
Q＝f
5(Y
1-Y
2)……………………………………………(6)
The method that this example adopts a probe allowing in the CLJF non-collective flow downhole ultrasonic flowmeter mozzle assembly move axially is made, the structure of ultrasonic flowmeter as shown in Figure 1, its manufacturing process is, first left probe 9 is packed in the base 7, and the lead-in wire of left probe 9 passed in the through wires hole of base 7, then with in plug screw 10 left probe 9 is compressed.The base 7 that left probe 9 is housed is packed in the mozzle 11, will sell 8 and be pressed in the mozzle 11, and snap in the keyway of base 7 sides, prevent that base 7 from rotating.The left plug screw 6 of spacing usefulness is screwed in the mozzle 11, and restriction base 7 is moved to the left; Right probe 12 is packed in the mounting head 13, fixing with right plug screw 14; The mounting head 13 that right probe 12 will be housed again screws in the mozzle 11.The lead-in wire of right probe 12 in the side opening of mozzle 11 through the left side; Again two lead-in wires are connected in the main frame 4 by sealing-plug 5; Motor 1 usefulness seal combination 2 is carried out movable sealing, and the internal thread of the output shaft of motor 1 and the input external thread rotary of base 7 are combined, and main frame 4 is inserted in the mozzles 11 again; With 3 screws 3 main frame 4 and mozzle 11 are linked together.
During use, make first left probe 9 and right probe l
2Distance equal l
1, respectively by left probe 9 and right probe l
2The emission sound wave is received by another probe, and test is by producing the emission pumping signal to the time T that receives the generation signal of telecommunication behind the sound wave
1And T
2Then by motor 1 output rotating torque, base 7 is axially mobile under threaded function.As left probe 9 and right probe l
2Distance equal l
2The time, motor stops operating.Respectively by left probe 9 and right probe l
2The emission sound wave is received by another probe, and test is by producing the emission pumping signal to the time T that receives the generation signal of telecommunication behind the sound wave
3And T
4T
1, T
2, T
3, T
4Design formulas as follows:
T
1＝t
11+t
31+t
22……………………………………………(7)
T
2＝t
12+t
32+t
21……………………………………………(8)
T
3＝t
11+t
33+t
22……………………………………………(9)
T
4＝t
12+t
34+t
21……………………………………………(10)
In the formula: t
11For left probe 9 by receiving pumping signal to producing hyperacoustic time;
t
12For left probe 9 by receiving ultrasonic signal to the time that produces the signal of telecommunication;
t
21For right probe 12 by receiving pumping signal to producing hyperacoustic time;
t
22For right probe 12 by receiving ultrasonic signal to the time that produces the signal of telecommunication;
t
31Be two probe distances when being l1, the sound wave of left probe 9 emissions is in the time of water transmission;
t
32Be two probe distances when being l1, the sound wave of right probe 12 emissions is in the time of water transmission;
t
33Be two probe distances when being l2, the sound wave of left probe 9 emissions is in the time of water transmission;
t
34Be two probe distances when being l2, the sound wave of right probe 12 emissions is in the time of water transmission;
If water (flow) direction is to flow to right probe 12 by left probe 9, flow velocity is V, and ultrasonic velocity is C.
t
31＝l1/(C+V)……………………………………………(11)
t
32＝l1/(C-V)……………………………………………(12)
t
33＝l2/(C+V)……………………………………………(13)
t
34＝l2/(C-V)……………………………………………(14)
Solution obtains formula (15) by the equation group that formula (7)～(14) form:
Functional relation f
6(V) by demarcate determining, can see the cache oblivious of outflow Q and probe, the do not popped one's head in impact of self parameter variation of test result has improved test accuracy.Concrete conversion opportunity can be used Timer Controlling, also can control on ground by the direct-reading cable.
Claims (8)
1. method that improves the layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy, it is characterized in that: in the constant situation in water injection well flow field, by changing the size of water injection well sample area, take multiple measurements, and then eliminate the error that probe self parameter produces with change of external conditions, improve the water injection well accuracy of flow rate test; Changing the size of water injection well sample area, is to realize by the relative position that changes between probe.
2. the method for raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy according to claim 1 is characterized in that: changing the relative position between probe, is to realize by the position each other that changes a plurality of probes.
3. the method for raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy according to claim 2 is characterized in that: when the relative position that changes between probe, change by the air line distance that changes front end between probe.
4. device that improves the layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy, it comprises mozzle (11), it is characterized in that: at mozzle (11) motor (1) is installed, the output shaft of motor (1) be connected with one can be in mozzle (11) base (7) of move left and right, left probe (9) is housed in base (7), and middle plug screw (10) compresses left probe (9), and pin (8) is pressed into mozzle (11), and snaps in the keyway of base (7) side; Mounting head (13) also is housed in mozzle (11), right probe (12) is housed in mounting head (13), and the fixing right probe (12) of right plug screw (14); Right probe (12) is connected with main frame (4), and main frame (4) is fixed in the mozzle (11).
5. the device of raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy according to claim 4, it is characterized in that: the end that base (7) is connected with motor (1) is equipped with left plug screw (6).
6. the device of raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy according to claim 4, it is characterized in that: motor (1) carries out movable sealing with seal combination parts (2).
7. the device of raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy according to claim 4, it is characterized in that: the lead-in wire of right probe (12) passes in the side opening of mozzle (11), connects main frame (4) by sealing-plug (5).
8. the device of raising layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields accuracy according to claim 4 is characterized in that: main frame (4) is fixing by screw (3) with mozzle (11).
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|---|---|---|---|
| CN2008103008194A CN101550822B (en) | 2008-04-02 | 2008-04-02 | Method and device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields |
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|---|---|---|---|
| CN2008103008194A CN101550822B (en) | 2008-04-02 | 2008-04-02 | Method and device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields |
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| CN101550822A CN101550822A (en) | 2009-10-07 |
| CN101550822B true CN101550822B (en) | 2013-04-24 |
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| CN102606135B (en) * | 2012-04-01 | 2015-02-11 | 中国石油大学(华东) | Detecting system for mass and flow of return solid particles in oil drilling shaft and detecting method |
| CN103061742B (en) * | 2013-01-16 | 2015-08-05 | 中国石油化工股份有限公司 | Multilayer flow follow-on test zonal testing device |
| CN106089186B (en) * | 2016-08-21 | 2023-03-24 | 中国石油化工股份有限公司 | Segmented water injection well mouth and well bottom signal wireless transmitting and receiving device and wireless transmission method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344914A (en) * | 2000-09-15 | 2002-04-17 | 海德罗索尼科国际有限公司 | Ultrasonic flow measuring method |
| CN200964852Y (en) * | 2006-10-31 | 2007-10-24 | 贵州航天凯山石油仪器有限公司 | Supersonic transducer sealed with O-shaped seal ring |
| CN201173796Y (en) * | 2008-04-02 | 2008-12-31 | 贵州航天凯山石油仪器有限公司 | Supersonic flowmeter capable of adjusting probe space |
-
2008
- 2008-04-02 CN CN2008103008194A patent/CN101550822B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1344914A (en) * | 2000-09-15 | 2002-04-17 | 海德罗索尼科国际有限公司 | Ultrasonic flow measuring method |
| CN200964852Y (en) * | 2006-10-31 | 2007-10-24 | 贵州航天凯山石油仪器有限公司 | Supersonic transducer sealed with O-shaped seal ring |
| CN201173796Y (en) * | 2008-04-02 | 2008-12-31 | 贵州航天凯山石油仪器有限公司 | Supersonic flowmeter capable of adjusting probe space |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平7-311063A 1995.11.28 |
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