CN106404079B - Compensation flow test method - Google Patents
Compensation flow test method Download PDFInfo
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- CN106404079B CN106404079B CN201610725236.0A CN201610725236A CN106404079B CN 106404079 B CN106404079 B CN 106404079B CN 201610725236 A CN201610725236 A CN 201610725236A CN 106404079 B CN106404079 B CN 106404079B
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- flow
- pump
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- sectional area
- cross
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- 238000010998 test method Methods 0.000 title claims description 12
- 238000005259 measurement Methods 0.000 claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 9
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a compensation flow testing method. The problem of inaccurate measurement of current measuring method has mainly been solved. The method is characterized in that: the method comprises the following steps: 1) testing the flow L of the pipe column without opening the constant flow pump; 2) starting a constant flow pump, wherein the flow rate of the constant flow pump is L0, and testing the flow rate L' of the column; 3) calculating to obtain the cross-sectional area of the reducing pipe column; 4) and correcting the flow rate through the corrected cross-sectional area. According to the compensation flow testing method, by adding the compensation flow method, the measurement error caused by the cross section change of the oil and the sleeve is corrected during non-flow collection measurement; eliminating errors due to instrument misalignment.
Description
Technical field
The present invention relates to oil field production logging technical field more particularly to a kind of compensating flowrate test methods.
Background technique
Current flux measurement is mainly afflux and non-collective flow measurement, and injection well is generally non-collective flow flow measurement, when oil, set
Pipe deformation, fouling etc. will lead to cross-sectional area and increase or reduce, and thus be decreased or increased the flow value of measurement.For note
Polymer well, fouling are even more serious.
When non-collective flow flow measurement, instrument is demarcated under oil pipe center situation, and in actual measurement, instrument is simultaneously different
It is fixed completely placed in the middle, therefore can also generate certain error.
Output well mostly uses afflux to measure greatly, and flow is calculated as turbine mode and measures, and turbine starts discharge capacity one in laboratory
As want 2m3/ d or more could start, and low discharge down-off and the linear relationship of turbine are bad.Start discharge capacity in practical applications
It is higher.
Summary of the invention
The invention reside in overcoming the problems, such as the measurement inaccuracy of existing measurement method present in background technique, and provide one kind
Compensating flowrate test method.The compensating flowrate test method, by increase compensating flowrate method, non-collective flow measurement when correct because
Measurement error caused by oil, casing cross section change；Eliminate the error not generated between two parties by instrument.
The present invention solves the problems, such as that it can reach by following technical solution: the compensating flowrate test method, including following
Step:
1) constant flow pump, test string flow L, are not turned on；
2) constant flow pump, is opened, constant current pump discharge is L0, test string flow L'；
3) tapered string cross-sectional area, is calculated；
4), flow is corrected by the cross-sectional area after correction.
The test philosophy of the compensating flowrate test method are as follows:
Increase constant flow pump in flowmeter, there is inlet and liquid outlet above and below flow measurement points, instrument internal increases stream
Body channel can generate fluid circulation L in the inside and outside portion of instrument when constant current pump startup0, in original flow L outside this sampling instrument
On the basis of increase L0, the total flow of measurement is L+L0.When the reversion of constant current direction, the total flow of measurement is L-L0。
When measuring point is at the changed A in section, flow measurements LA=it is VA×t×S1,
VAFluid velocity
The t- time
S1Annular space sectional area (fixed value calculated according to pipe aperture, instrument outer diameter) between oil pipe and instrument
Since cross-sectional area becomes smaller at changes of section oil pipe A point, and flow is constant, therefore measures VAIncrease, leads to flow
Measurement result increases.
Starting constant flow pump measures A point, measured value L againA'=VA'×t×S1。
Because of constant current pump discharge L0It is known that measured value is LA'-LA, then the real sectional area S of A point at deformation0=L0/ (V0× t)=
L0/ ((LA'-LA)×S1。
There is true cross-sectional area can be to because deformation or fouling cause the error of flow measurement to be corrected.
Constant current direction can also be inverted and further reduce error.
By the test method of compensating flowrate, it is equivalent to the oil pipe cross-sectional state at that time, instrument at that time is in oil pipe
It is the location of middle to have carried out instant calibration, therefore also eliminate the error not generated between two parties by instrument.
Output well measurements principle is identical as injection well measuring principle, contrary (in-flow).When constant current flow is greater than instrument
When device starts discharge capacity, the measurement lower limit of flowmeter is reduced to 0m3/d。
The present invention can have the following beneficial effects: the compensating flowrate test method compared with above-mentioned background technique, can be with
Error correction is carried out to non-collective flow flow measurement, is on the one hand the error generated by oil pipe cross-section variation, is on the other hand
The error not generated between two parties due to instrument.Flowmeter can be made normally to start under low discharge applied to output well, if into
Liquid mouth carries out gas disposal of overflowing, and can also reduce gas influence.
Detailed description of the invention:
Attached drawing 1 is principle of the invention structural schematic diagram；
In figure: 1- injection flow L, 2- compensating flowrate L0, 3- constant flow pump, 4- flowmeter, 5- changes of section oil pipe A, 6-
Normal casing B.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings and the specific embodiments:
As shown in Figure 1, injection well outer-flowing type leak-off-test principle, increases constant flow pump 3, in flow measurement in flowmeter 4
Point has inlet and liquid outlet up and down, and instrument internal increases fluid channel, measures flow L at changes of section oil pipe A.Work as constant current
When pump startup, fluid circulation L can be generated in the inside and outside portion of instrument0, when measuring point is at the changed A in section, outside this sampling instrument
Portion increases compensating flowrate L on the basis of original injection flow L0, the total flow of measurement is that L'(real traffic is L+L0).When
When constant current direction inverts, real traffic L-L0。
Embodiment 1:
The compensating flowrate test method, comprising the following steps:
1, constant flow pump, test string flow L are not turned on；
2, constant flow pump is opened, constant current pump discharge is L0, test string flow L'；
3, by the way that tapered string cross-sectional area S '=L is calculated0/ ((L'-L) × S；Wherein S is normal tubing string cross section
Product；
4, flow is corrected by the tapered string cross-sectional area after correction；That is LVery=L/S ×S’。
Flow is not achieved the well of flowmeter starting discharge capacity, starting constant flow pump measures, and subtracts constant current to measured value
Flow is tubing string real traffic.
By increasing compensating flowrate method, in non-collective flow measurement, correction caused by oil, the variation of casing cross section because measuring
Error；Eliminate the error not generated between two parties by instrument.When collecting flow measurement, turbine is enable normally to open in the case where low yield liquid
It is dynamic, lower flow can be measured.
Claims (2)
1. a kind of compensating flowrate test method, it is characterised in that: the following steps are included:
1) flowmeter (4) is arranged in pipe, increases constant flow pump (3) in flowmeter (4), there is inlet above and below flow measurement points
And liquid outlet, instrument internal increases fluid channel, when constant current pump startup, can generate fluid circulation L in the inside and outside portion of instrument0；
2) constant flow pump, test string flow L, are not turned on；
3) constant flow pump, is opened, constant current pump discharge is L0, test string flow L'；
4) tapered string cross-sectional area, is calculated；
Tapered string cross-sectional area calculation formula are as follows:
S’=L0/ ((L'-L) × S；
In formula: S is normal tubing string cross-sectional area；L0 is constant current pump discharge；L' is to test flow when opening constant flow pump；L is not open
Open constant flow pump test flow
5), flow is corrected by the cross-sectional area after correction:
That is LVery=L/S ×S’。
2. compensating flowrate test method according to claim 1, it is characterised in that: flow is not up in the step (5)
When starting discharge capacity to flowmeter, starting constant flow pump is measured, and subtracting constant current pump discharge to measured value is tubing string real traffic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610725236.0A CN106404079B (en) | 2016-08-25 | 2016-08-25 | Compensation flow test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610725236.0A CN106404079B (en) | 2016-08-25 | 2016-08-25 | Compensation flow test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106404079A CN106404079A (en) | 2017-02-15 |
| CN106404079B true CN106404079B (en) | 2019-05-21 |
Family
ID=58004678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610725236.0A Active CN106404079B (en) | 2016-08-25 | 2016-08-25 | Compensation flow test method |
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| Country | Link |
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| CN (1) | CN106404079B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146806A (en) * | 1994-03-23 | 1997-04-02 | 施蓝姆伯格工业公司 | Vortex flowmeter comprising a profiled duct |
| US5880378A (en) * | 1996-08-19 | 1999-03-09 | Southwest Research Institute | Critical flow venturi with variable and continuous range |
| EP0971211A2 (en) * | 1998-07-09 | 2000-01-12 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas sampling method using a flow rate detector with variable Venturi |
| CN103323060A (en) * | 2013-06-11 | 2013-09-25 | 鞍钢股份有限公司 | Method for testing gas flow and flow velocity of pipeline |
| CN104251724A (en) * | 2014-09-25 | 2014-12-31 | 上海玮轩电子科技有限公司 | Fluid flow measuring apparatus |
-
2016
- 2016-08-25 CN CN201610725236.0A patent/CN106404079B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146806A (en) * | 1994-03-23 | 1997-04-02 | 施蓝姆伯格工业公司 | Vortex flowmeter comprising a profiled duct |
| US5880378A (en) * | 1996-08-19 | 1999-03-09 | Southwest Research Institute | Critical flow venturi with variable and continuous range |
| EP0971211A2 (en) * | 1998-07-09 | 2000-01-12 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas sampling method using a flow rate detector with variable Venturi |
| CN103323060A (en) * | 2013-06-11 | 2013-09-25 | 鞍钢股份有限公司 | Method for testing gas flow and flow velocity of pipeline |
| CN104251724A (en) * | 2014-09-25 | 2014-12-31 | 上海玮轩电子科技有限公司 | Fluid flow measuring apparatus |
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| Publication number | Publication date |
|---|---|
| CN106404079A (en) | 2017-02-15 |
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