CN106499387B - A kind of active specific retention measuring device - Google Patents
A kind of active specific retention measuring device Download PDFInfo
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- CN106499387B CN106499387B CN201611189523.0A CN201611189523A CN106499387B CN 106499387 B CN106499387 B CN 106499387B CN 201611189523 A CN201611189523 A CN 201611189523A CN 106499387 B CN106499387 B CN 106499387B
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- 230000014759 maintenance of location Effects 0.000 title claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 12
- 239000011796 hollow space material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 14
- 239000000523 sample Substances 0.000 description 19
- 239000007788 liquid Substances 0.000 description 5
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a kind of active specific retention measuring devices, including including full bore flowmeter, rotary components, center water cut meter, temperature and pressure transmitter, magnetic orientation, halter；The rotary components include rotary components A and rotary components B, successively install above the full bore flowmeter and are connected with rotary components A, center water cut meter, rotary components B, pressure sensor, magnetic orientation, halter；Wherein, rotary components A and rotary components B that center water cut meter is separately connected up and down, the rotary components A is identical as rotary components B structure, and installation direction is opposite；The rotary components are equipped with rotating vane.The present invention mixes the fluid at wellbore centre position by rotating vane, using the method for rotating mixed, improves measurement accuracy, and so that device is met uplink and downlink measurement simultaneously by structure design, and be easier to go into the well.
Description
Technical field
The present apparatus is related to technical field of underground measurement, in particular to a kind of dress for the specific retention for measuring liquid generated underground section
It sets.
Background technique
At present measurement oil well liquid-producing section retention rate instrument method it is very much, using be most extensively capacitance method water cut meter and
Radioactive density meter.Capacitance method water cut meter is to obtain specific retention by measuring the capacitance of fluid-mixing.Capacitance method specific retention
The sampling room of meter can be equivalent to a coaxial cylindrical condenser, and oil gas aqueous mixtures are dielectrics, when oil with the content of water not
Meanwhile the capacitor of ganged condenser correspondingly changes, therefore can obtain specific retention by measuring capacitance.
In vertical well, each payzone production status is different, and there are slippage effects between fluid, cause heterogeneous fluid
Mixing is uneven.Simultaneously in low yield horizontal well, high angle deviated well section, due to gravitational differentiation, lightweight phase is mutually generated with heavy
Water is presented in lower oil in upper Laminar Flow in separation, oil, water two-phase.And in the well logging of capacitance method specific retention, key component of logging well
It is that each phase fluid is required uniformly to mix.Therefore conventional single probe specific retention method has certain limitation under this hole condition.
The measurement request measuring probe of single probe retention rate instrument and density measuring instrument is placed in the middle, this inevitable requirement detected fluid is in instrument
Uniformly mixing nearby.In vertical well, when phase fluid each in pit shaft is unevenly distributed, measurement result has very big deviation.?
In horizontal well, due to fluid layering, single probe is possible to be completely disposed in multiphase flow within a certain phase, measurement result accuracy rate
Less than 50%.Therefore when single probe holdup measurement, probe is located under water termination, and measurement data 100% is water, and test result is tight
Weight mistake.
To improve measurement accuracy, the method currently used for obtaining each perforation layer yield is held with the mode of passive measurement
Rate measurement (i.e. according to flow pattern feature, passively increases probe number and distributing position).Using the passive side for increasing measuring probe
Formula measures, i.e. array water holdup tool.A probe in 3 (or 4,6,8), which is axially evenly distributed with, in instrument carries out the measurement of Multi probe holdup.
Array holdup is chiefly used in horizontal well, which is greater than single probe instrument, but expensive, measurement
It is at high cost.Multi probe holdup measures accuracy rate and the scope of application is better than single probe measurement, but is having the following problems:
1), although the accuracy rate of measurement can be improved in Multi probe measurement, accuracy rate at this time is only with respect to single probe
For.
2), the yield of each perforation layer in shaft bottom is measured, but due to being influenced by logging environment, flow rate log data
Deviate actual conditions.
3), due to the increase for number of popping one's head in, wellbore section product variation is caused, fluid flow rate changes, and leads to flow rate log knot
Fruit deviates actual conditions.
4), apparatus structure is complicated, and instrument is easier to break down.
5), logging cost and data interpretation cost increase.
Radioactive density meter is to measure fluid in gamma ray and sampling channel the meter that Compton effect scatters photon occurs
Digit rate determines fluid density, and then calculates specific retention.The deficiency of radioactive density meter is that sampling range is small.Only near measured center
Fluid density, do not represent averag density.When variations in flow patterns is larger, fluid mixing is uneven, density and averag density are measured
Difference is bigger, especially true in inclined shaft and horizontal well.
Therefore, the key point of the well logging of capacitance method specific retention and radioactive density meter well logging is the stream required near measuring probe
Body uniformly mixes.In view of the above-mentioned problems, domestic outer portion expert proposes that mixing arrangement, such as application number is arranged using before list probe
A kind of turbine stirrer is disclosed for 200720201536.5 Chinese patent " capacitance method retention rate instrument rotary type probe ", but
The mainly small yield of the technical issues of it is directed to and moisture content are greater than 40% well, and blade construction is complicated, in mixing liquid
It will cause liquid flowing excessively disorder simultaneously, damage will cause to the service life of probe.It finds one kind and is able to satisfy measurement accuracy
And the structure of protection device simultaneously, it is made great sense for solving the above problems.
Summary of the invention
In order to overcome the deficiencies of the above existing technologies, it is an object of the invention to propose a kind of active specific retention survey
Device and method is measured, the uniform mixability of fluid near instrument is improved using the method for rotation mixing heterogeneous fluid, improves measurement
Precision.
Technical scheme is as follows:
A kind of active specific retention measuring device, including full bore flowmeter, rotary components, center water cut meter, temperature
Pressure sensor, magnetic orientation, halter；The rotary components include rotary components A and rotary components B, the full hole flow
Successively installation is connected with rotary components A, center water cut meter, rotary components B, pressure sensor, magnetic orientation, Malong for meter top
Head；Wherein, the rotary components A and rotary components B, the rotary components A and rotation group that center water cut meter is separately connected up and down
Part B structure is identical, and installation direction is opposite；
The rotary components include motor fixing seat, motor, deceleration unit, rotary shaft, rotating vane, rotating seat, bearing,
Instrument connector, rotation end bearing block, round end outer wall, motor end bearing block, motor side outer wall, spring, rotation end bearing block,
Signal wire；The motor is fixed in motor fixing seat, and deceleration unit is connected above motor, connects speed reducer below rotary shaft
Group；Rotary shaft is hollow structure, and middle part is equipped with the shaft shoulder, and motor side bearing sleeve sets on the rotary shaft, rotated by setting
1# nut is set below axis, motor end bearing block is pushed against below the shaft shoulder, by side's setting 2# nut on the rotary shaft, will be revolved
Turn end bearing block to be pushed against below the shaft shoulder；Motor side outer wall, motor side outer wall lower end and motor are equipped on the outside of motor end bearing block
Fixing seat connection；Round end bearing sleeve is set on the rotary shaft, passes through the 2# angular contact ball being mounted on the inside of rotation end bearing block
Bearing is mutually rotated with rotary shaft, and round end outer wall is equipped on the outside of rotation end bearing block, and round end outer wall upper end connects instrument and connects
Fitting, the instrument connector are hollow structure, and upper end is equipped with the step of from-inner-to-outer, and instrument connector outer sheath is equipped with bullet
Spring, spring upper end push against step, and lower end is equipped with bearing；
The bearing inner wall and instrument connector outer wall are via hole cooperation, and bearing can go up downslide in instrument connector outer wall
It is dynamic, rotating seat is equipped on the outside of bearing, rotating seat connects rotating vane top, and rotating vane lower part connects on the outside of rotary shaft step；
The rotating vane is the outside curved metal bar in middle part；
Slip ring and lower slip ring are separately installed with above and below the rotary shaft, the signal wire is divided into conducting wire, 1# is passed
Defeated line, 2# transmission line, motor fixing seat are equipped with aperture, and 1# transmission line is passed through from the aperture of motor fixing seat, reach lower slip ring
Afterwards, by downslide ring transition to conducting wire, the hollow space for being then passed through rotary shaft reaches upper slip ring, is transferred to 2# by upper slip ring and passes
Defeated line then passes through instrument connector, is connected upwardly to well head.
Further, the motor end bearing block, be equipped with seal groove on rotation end bearing block, it is real after sealing ring is installed
The sealing in outside in existing motor side outer wall.
Further, the shaft shoulder of the rotary shaft is equipped with seal groove up and down, after installing sealing ring, realizes motor side outer wall
The sealing in interior outside.
Further, the rotating vane is equipped with 4, is axially uniformly mounted on the shaft shoulder and rotating seat of rotary shaft.
Further, the rotary components A can be individually attached use, carry out downlink measurement.
Further, the rotary components B can be individually attached use, carry out out-hole run.
This practical new advantage is:
1, the mode for proposing a kind of novel measurement liquid generated underground specific retention makes wellbore centre using the method that multiple-blade rotates
Fluid at position is mixed, and measurement accuracy is improved；
2, rotating seat can slide axially on the outside of instrument connector, realize the adjustment of rotary components maximum outside diameter, can
So that the diameter of instrument is smaller, it is suitable for small wellbore environment；
3, it is equipped with simultaneously using rotary components A and rotary components B, out-hole run and downlink measurement can be carried out；
4, the utility model structure is simple, convenient disassembly, can select rotary components according to different casing sizes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model rotary components.
In figure, 1, motor fixing seat, 2, motor, 3, deceleration unit, 4,1# transmission line, 5, motor side outer wall, 6, lower slip ring,
7, conducting wire, 8, rotary shaft, 9,1# nut, 10,1# angular contact ball bearing, 11, motor end bearing block, 12, round end outer wall, 13,
Rotation end bearing block, 14,2# angular contact ball bearing, 15,2# nut, 16, upper slip ring, 17, rotating vane, 18, rotating seat, 19,
Bearing, 20,2# transmission line, 21, spring, 22, instrument connector, 23, casing, 24, full bore flowmeter, 25, rotary components A,
26, center water cut meter, 27, rotary components B, 28, temperature and pressure transmitter, 29, magnetic orientation, 30, halter.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, a kind of active specific retention measuring device, is sequentially connected installation full bore flowmeter from bottom to top
24, rotary components A25, center water cut meter 26, rotary components B27, temperature and pressure transmitter 28, magnetic orientation 29, halter 30.
As shown in Fig. 2, Fig. 2 is the structural schematic diagram of rotary components, it include that motor is fixed including the rotary components
Seat 1, motor 2, deceleration unit 3, rotary shaft 8, rotating vane 17, rotating seat 18, bearing 19, instrument connector 22, round end axis
Hold seat 13, round end outer wall 12, motor end bearing block 11, motor side outer wall 5, spring 21, rotation end bearing block 13, conducting wire 7,1#
Transmission line 4,2# transmission line 20；The motor 2 is fixed in motor fixing seat 1, and deceleration unit, rotary shaft are connected above motor 2
Lower section connects deceleration unit 3；Rotary shaft 8 is hollow structure, and middle part is equipped with the shaft shoulder, and 2 end bearing block of motor is set in rotary shaft 8
On, by the way that 1# nut 9 is arranged below rotary shaft 8,2 end bearing block of motor is pushed against below the shaft shoulder, by the rotary shaft
Side's setting 2# nut 15, rotation end bearing block 13 is pushed against below the shaft shoulder；Motor side outer wall is equipped on the outside of 2 end bearing block of motor
5,5 lower end of motor side outer wall is connect with motor fixing seat 1；Rotation end bearing block 13 is arranged on rotating shaft 8, by being tightened on
The 2# nut 15 of 8 top of shaft is pushed against above the shaft shoulder, by the 2# angular contact ball axis for being mounted on 13 inside of rotation end bearing block
It holds 14 mutually to rotate with rotary shaft 8, rotates and be equipped with round end outer wall 12 on the outside of end bearing block 13, the connection of 12 upper end of round end outer wall
Instrument connector 22, the instrument connector 22 are hollow structure, and upper end is equipped with the step of from-inner-to-outer, outside instrument connector 22
Side is arranged with spring 21, and 21 upper end of spring pushes against step, and lower end is equipped with bearing 19；19 inner wall of bearing and instrument connector
22 outer walls are via hole cooperation, and bearing can be slided up and down in 22 outer wall of instrument connector, and rotating seat 18, rotating seat are equipped on the outside of bearing
18 connection 17 tops of rotating vane, 17 lower part of rotating vane connects on the outside of 8 step of rotary shaft；The rotating vane 17 be middle part to
Outer curved metal bar, rotating vane 17 are equipped with 4 altogether, are axially uniformly mounted on the shaft shoulder and rotating seat 18 of rotary shaft 8；Institute
It states and is separately installed with slip ring 16 and lower slip ring 6 above and below rotary shaft 8, motor fixing seat 1 is equipped with aperture, 1# transmission line
4 pass through from the aperture of motor fixing seat 1, after reaching lower slip ring 6, are transferred to conducting wire 7 by lower slip ring 6, are then passed through rotary shaft 8
Hollow space reaches upper slip ring 16, is transferred to 2# transmission line 20 by upper slip ring 16, then passes through instrument connector 22, connect upwards
It is connected to well head, well head is equipped with corresponding engine, and motor 2 is driven to operate.2 end bearing block of motor, rotation end bearing block
It is equipped with seal groove on 13, after sealing ring is installed, realizes the sealing in outside in motor side outer wall 5；On the shaft shoulder of the rotary shaft 8
Under be equipped with seal groove, after sealing ring is installed, realize the sealing in outside in motor side outer wall 5.
As needed, rotary components A25 and rotary components B27, Lai Jinhang out-hole run be can be used alone and downlink is surveyed
Amount.
It is connected between motor side outer wall 5 and motor end bearing block 11 using screw, realizes motor side outer wall 5 and do not move axially
It is dynamic, the purpose of radial rotating；It is connected between round end outer wall 12 and rotation end bearing block 13 using screw, makes round end outer wall 12
Realize it is axial do not move, the purpose of radial rotating.
The step of being tested using the utility model is as follows:
Go into the well step: a kind of active specific retention measuring device and ground instrument are connected with single-core cable, and device is passed through
Annular space is gone into the well into casing 23, and the rotating vane 17 of rotary components A25 is when passing through oil pipe annular space when going into the well, because by oil jacket sky
Between size limit, rotating vane 17 will be compressed, and in compression process, the radial compression power that rotating vane 17 is received will pass through
Axial deformation is transmitted on the slide block mechanism as composed by bearing 19 and rotating seat 18, therefore slide block mechanism is driven to do axial shifting
Dynamic, spring 21 is compressed at this time, and rotary components A25 smoothly goes into the well；After rotary components A25 smoothly leads to oil jacket annulus space,
Spring 21 loses external force extruding, and screen resilience shifts slide block mechanism onto home position.
Testing procedure: after the utility model, which is gone into the well, reaches specified fluid producing layer, start to be powered to the present apparatus, at this time motor 2
And deceleration unit 3 rotates, and rotary components A25 is driven to rotate, and after first allowing motor 2 to run 1min in designated position, starts to survey
Amount:
It includes fluid resistance F that motor 2, which rotates suffered resistance F,1With sealing ring resistance F2
F=F1+F2 (1)
In formula: F1- fluid resistance, N；
C-resistance coefficient；
ρ-fluid density, Kg/m3；
ν-rotating vane linear velocity, m/s；
S-vertical direction cross-sectional area, m2；
F2=π Db μ Pci+πD2Pc/4 (3)
In formula: F2- sealing ring resistance, N；
D-transmission shaft diameter, mm；
B-sealing ring interface width, mm；
μ-the coefficient of sliding friction；
Pc- it is sealing ring rubbing surface contact stress, it can use logging environment pressure, MPa；
I-is the quiet dynamic friction ratio of sealing ring.
Therefore, the selection of motor 2 and deceleration unit 3 must be the torque that torque provided by motor 2 is greater than resistance institute band,
It just can guarantee the normal work.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (6)
1. a kind of active specific retention measuring device, which is characterized in that including full bore flowmeter, rotary components, center water holding
Rate meter, temperature and pressure transmitter, magnetic orientation, halter；The rotary components include rotary components A and rotary components B, described complete
Successively to be connected with rotary components A, center water cut meter, rotary components B, pressure sensor, magnetic fixed for installation above wellbore flowmeter
Position, halter；Wherein, center water cut meter up and down the rotary components A that is separately connected and rotary components B, the rotary components A with
Rotary components B structure is identical, and installation direction is opposite；
The rotary components include motor fixing seat, motor, deceleration unit, rotary shaft, rotating vane, rotating seat, bearing, instrument
Connector, rotation end bearing block, round end outer wall, motor end bearing block, motor side outer wall, spring, rotation end bearing block, signal
Line；The motor is fixed in motor fixing seat, and deceleration unit is connected above motor, connects deceleration unit below rotary shaft；Rotation
Shaft is hollow structure, and middle part is equipped with the shaft shoulder, and motor side bearing sleeve is set on the rotary shaft, by being arranged below rotary shaft
1# nut is set, motor end bearing block is pushed against below the shaft shoulder, by side's setting 2# nut on the rotary shaft, by round end axis
Seat is held to be pushed against below the shaft shoulder；Motor side outer wall, motor side outer wall lower end and motor fixing seat are equipped on the outside of motor end bearing block
Connection；Round end bearing sleeve set on the rotary shaft, by be mounted on rotation end bearing block on the inside of 2# angular contact ball bearing with
Rotary shaft mutually rotates, and round end outer wall is equipped on the outside of rotation end bearing block, and round end outer wall upper end connects instrument connector, institute
Stating instrument connector is hollow structure, and upper end is equipped with the step of from-inner-to-outer, and instrument connector outer sheath is equipped with spring, on spring
End pushes against step, and lower end is equipped with bearing；
The bearing inner wall and instrument connector outer wall are via hole cooperation, and bearing can be slided up and down in instrument connector outer wall, axis
It holds outside and is equipped with rotating seat, rotating seat connects rotating vane top, and rotating vane lower part connects on the outside of rotary shaft step；The rotation
Rotating vane piece is the outside curved metal bar in middle part；
Be separately installed with slip ring and lower slip ring above and below the rotary shaft, the signal wire be divided into conducting wire, 1# transmission line,
2# transmission line, motor fixing seat are equipped with aperture, and 1# transmission line is passed through from the aperture of motor fixing seat, after reaching lower slip ring, lead to
Downslide ring transition is crossed to conducting wire, the hollow space for being then passed through rotary shaft reaches upper slip ring, is transferred to 2# transmission line by upper slip ring,
Instrument connector is then passed through, well head is connected upwardly to.
2. a kind of active specific retention measuring device according to claim 1, which is characterized in that the motor end bearing
It is equipped with seal groove on seat, rotation end bearing block, after sealing ring is installed, realizes the sealing in outside in motor side outer wall.
3. a kind of active specific retention measuring device according to claim 1, which is characterized in that the shaft shoulder of the rotary shaft
It is equipped with seal groove up and down, after sealing ring is installed, realizes the sealing in outside in motor side outer wall.
4. a kind of active specific retention measuring device according to claim 1, which is characterized in that the rotating vane is equipped with
It is 4, axial to be uniformly mounted on the shaft shoulder and rotating seat of rotary shaft.
5. a kind of active specific retention measuring device according to any one of claims 1 to 4, which is characterized in that the rotation
Turning component A can be individually attached use, carry out downlink measurement.
6. a kind of active specific retention measuring device according to any one of claims 1 to 4, which is characterized in that the rotation
Turning component B can be individually attached use, carry out out-hole run.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611189523.0A CN106499387B (en) | 2016-12-21 | 2016-12-21 | A kind of active specific retention measuring device |
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| CN201611189523.0A CN106499387B (en) | 2016-12-21 | 2016-12-21 | A kind of active specific retention measuring device |
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| CN109372480B (en) * | 2018-05-23 | 2021-03-09 | 中国石油化工股份有限公司 | Movable underground power generation device and method for water injection well |
| CN110886609B (en) * | 2019-12-04 | 2022-08-26 | 西南石油大学 | Device for improving measurement accuracy of water holdup of low-yield high-water-content oil well |
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