CN202338325U - Underground electromagnetic flow meter for low-permeability oil field - Google Patents
Underground electromagnetic flow meter for low-permeability oil field Download PDFInfo
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- CN202338325U CN202338325U CN2011204362677U CN201120436267U CN202338325U CN 202338325 U CN202338325 U CN 202338325U CN 2011204362677 U CN2011204362677 U CN 2011204362677U CN 201120436267 U CN201120436267 U CN 201120436267U CN 202338325 U CN202338325 U CN 202338325U
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- Prior art keywords
- flow meter
- electromagnetic flow
- oil field
- permeability oil
- electromagnetic
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- 238000005259 measurement Methods 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 230000007547 defect Effects 0.000 abstract 1
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Abstract
The utility model discloses an underground electromagnetic flow meter for a low-permeability oil field. The underground electromagnetic flow meter comprises a shell in a shape of a hollow cylinder. A water inlet-outlet is arranged at the top of the shell; a water nozzle is mounted on the water inlet-outlet; the shell is internally provided with a cylindrical battery cylinder, a pressure sensor and an electromagnetic flow sensor which are connected in sequence from top to bottom; a guide groove is arranged on the outer wall of the cylindrical battery cylinder; the electromagnetic flow sensor comprises a measurement pipe and a convertor, which are connected through a cable; and two electrodes pass through the pipe wall along a pipe diameter direction of the measurement pipe and then fixed on the measurement pipe. With the adoption of the underground electromagnetic flow meter for the low-permeability oil field provided by the utility model, the problems that a mechanical flow meter has the defects of narrow application range, low test precision and short service life, and the traditional electromagnetic flow meter is complex in structure and is not applicable to using underground can be solved.
Description
Technical field
The utility model belongs to the oil exploration equipment technical field, relates to a kind of downhole electromagnetic formula flow meter, is specifically related to a kind of downhole electromagnetic formula flow meter that is used for low permeability oil field.
Background technology
The oil exploitation technology of China was constantly progressive in recent years, for greatly contribution has been made in the China's oil development of resources.Simultaneously also there are some oil fields to exist hyposmosis, low-pressure, low-abundance geologic feature to bring great challenge to Oilfield developing; Naturally the production capacity in these oil fields is lower, need carry out fracturing reform to oil well and could go into operation, because oil reservoir is low pressure unsaturation lithological pool mostly; Lacking natural energy replenishes; It is main that natural energy only drives with elasticity and solution gas, and these Oilfield developing production declines are fast, and economic recovery is very low; Come makeup energy to a lot of Oilfield using water injection technologies of this situation, this is the preferred manner that improves development benefit.In the process of carrying out oil-field flooding, to measure the zonal flow rate in the water injection well in oil fields with downhole flowmeter; And adopt more flow to count suspended body flowmeter or turbine flowmeter at present both at home and abroad; Thereby these two kinds of flow meters all are to rely on injection water slug mechanical movable part to obtain flow signal, but in the process of using, will note water quality, otherwise the impurity such as silt that mechanical movable part just might be had in the water are stuck; Cause mechanical breakdown, influence test result.Adopt produced-water reinjection technology in order to save the many oil recovery factories of resource at present, and suspended body flowmeter or turbine flowmeter can't satisfy the produced-water reinjection technological requirement, also exist application life short, certainty of measurement low defective.
Some electromagnetic type flow meters have appearred in the demand in heavy wool field in order to satisfy more; But the most complex structure of these flow meters; Adopt current single flow passage; Be inappropriate for the space, down-hole of small size and high pressure, use on the only suitable ground, particularly can not satisfy the test of some low permeability oil field downhole flows.
Summary of the invention
The purpose of the utility model provides a kind of downhole electromagnetic formula flow meter that is used for low permeability oil field; Solved mechanical flow meter narrow application range, measuring accuracy is low, application life is short, and traditional electrical magnetic-type flowmeter structure complicacy is not suitable for the problem that use the down-hole.
The technical scheme that the utility model adopted is; A kind of downhole electromagnetic formula flow meter that is used for low permeability oil field; The shell that comprises hollow tube-shape, the top of shell is provided with intake-outlet, and water nozzle is installed on the intake-outlet; Enclosure includes cylindrical battery tube, pressure sensor and the electromagnetic flow transducer that connects successively from top to bottom; The outer wall of cylindrical battery tube is provided with guiding gutter, and electromagnetic flow transducer comprises measuring tube and the converter that connects through cable, and two electrodes pass tube wall along measuring tube caliber direction and are fixed on the measuring tube.
The characteristic of the utility model also is,
The water nozzle that install at the intake-outlet place is ceramic water nozzle,
Pressure sensor adopts semiconductor pressure sensor,
Electromagnetic flow transducer is a LD type electromagnetic flow transducer,
Guiding gutter is provided with two or more.
The beneficial effect of the utility model is; The zonal flow rate that can be used in the water injection in low-permeability oilfield well is measured; Adopt electromagnetic induction principle to measure the mean flow rate of conduit inner fluid, further try to achieve the volume flow of fluid, this electromagnetic flowmeter relatively simple for structure through formula; Certainty of measurement is high, is particularly suitable for low permeability oil field and uses.
Description of drawings
Fig. 1 is the structural representation that the utility model is used for the downhole electromagnetic formula flow meter of low permeability oil field.
Among the figure, 1. shell, 2. intake-outlet, 3. water nozzle, 4. cylindrical battery tube, 5. pressure sensor, 6. electromagnetic flow transducer, 7. guiding gutter, 8. measuring tube, 9. electrode.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is elaborated.
The utility model is used for the structure of the downhole electromagnetic formula flow meter of low permeability oil field; As shown in Figure 1; Comprise the shell 1 of hollow tube-shape, the top of shell 1 is provided with intake-outlet 2, and water nozzle 3 is installed on the intake-outlet 2; Shell 1 inside includes cylindrical battery tube 4, pressure sensor 5 and the electromagnetic flow transducer 6 that connects successively from top to bottom; The outer wall of cylindrical battery tube 4 is provided with guiding gutter 7, and electromagnetic flow transducer 6 comprises measuring tube 8 and the converter that connects through cable, and two electrodes 9 pass tube wall along measuring tube 8 caliber directions and are fixed on the measuring tube 8.
Before instrument is gone into the well; At first electromagnetic flow transducer 6 is carried out the demarcation of flow, temperature and pressure; Make range and the precision of instrument all in being fit to scope, electromagnetic type flow meter external diameter of the present invention is 42mm, and the pressure limit of adaptation is 0 ~ 40MPa; Pressure precision is 0.1%FS, and the range of flow is 20m
3, 40m
3, flow accuracy 0.5 FS.Next electromagnetic flowmeter is connected to the testing seal section of down-hole process pipe string; The following layer to be measured with the instrument that connects to the down-hole, whole device relies on the powered battery in the cylindrical battery tube 4, injects water nozzle 3 inflows that water is installed by intake-outlet 2 places; Through there being guiding gutter 7 to flow into around cylindrical battery tube 4 outer walls; Fluid is imported to the pressure sensor 5 of bottom, and pressure sensor 5 is a semiconductor Piezoelectric Impedance diffusion pressure sensor, and the sheet surface of fluid on pressure sensor forms semiconductor strain pressure; Make the thin slice distortion produce the Piezoelectric Impedance effect through external force (pressure), thereby make the variation of impedance convert the signal of telecommunication to.Can record the injection pressure of current layer through pressure sensor 5.The electromagnetic flow transducer 6 that install the electromagnetic flowmeter bottom; When the fluid with certain electrical conductivity passes through the measuring tube 8 of electromagnetic flow transducer 6; Cutting magnetic line is induced electromotive force E; Electromotive force E (flow signal) is detected by electrode 9 and delivers to the inner converter of electromagnetic flow transducer 6 through cable; Converter with the flow signal processing and amplifying after; Can show fluid flow q (
); And output current signal and pulse signal, converter can show that also functions such as instantaneous delivery and integrated flux and upper and lower limit alarm communication system are used for the control and the adjusting of flow.
Claims (5)
1. downhole electromagnetic formula flow meter that is used for low permeability oil field; It is characterized in that; Comprise the shell (1) of hollow tube-shape, the top of shell (1) is provided with intake-outlet (2), and water nozzle (3) is installed on the intake-outlet (2); Shell (1) inside includes cylindrical battery tube (4), pressure sensor (5) and the electromagnetic flow transducer (6) that connects successively from top to bottom; The outer wall of cylindrical battery tube (4) is provided with guiding gutter (7), and electromagnetic flow transducer (6) comprises measuring tube (8) and the converter that connects through cable, and two electrodes (9) pass tube wall along measuring tube (8) caliber direction and are fixed on the measuring tube (8).
2. the downhole electromagnetic formula flow meter that is used for low permeability oil field according to claim 1 is characterized in that the water nozzle (3) that said intake-outlet (2) is located to install is ceramic water nozzle.
3. the downhole electromagnetic formula flow meter that is used for low permeability oil field according to claim 1 is characterized in that, said pressure sensor (5) adopts semiconductor pressure sensor.
4. the downhole electromagnetic formula flow meter that is used for low permeability oil field according to claim 1 is characterized in that said electromagnetic flow transducer (6) is a LD type electromagnetic flow transducer.
5. the downhole electromagnetic formula flow meter that is used for low permeability oil field according to claim 1 is characterized in that said guiding gutter (7) is provided with two or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204362677U CN202338325U (en) | 2011-11-07 | 2011-11-07 | Underground electromagnetic flow meter for low-permeability oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204362677U CN202338325U (en) | 2011-11-07 | 2011-11-07 | Underground electromagnetic flow meter for low-permeability oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202338325U true CN202338325U (en) | 2012-07-18 |
Family
ID=46487018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204362677U Expired - Fee Related CN202338325U (en) | 2011-11-07 | 2011-11-07 | Underground electromagnetic flow meter for low-permeability oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202338325U (en) |
-
2011
- 2011-11-07 CN CN2011204362677U patent/CN202338325U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20171107 |