CN104634423A - Method for calibrating high-pressure flow meters of water injection wells in oil fields in online manner - Google Patents
Method for calibrating high-pressure flow meters of water injection wells in oil fields in online manner Download PDFInfo
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- CN104634423A CN104634423A CN201510066746.7A CN201510066746A CN104634423A CN 104634423 A CN104634423 A CN 104634423A CN 201510066746 A CN201510066746 A CN 201510066746A CN 104634423 A CN104634423 A CN 104634423A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 230000000630 rising effect Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 10
- 230000002571 modificatory effect Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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Abstract
The invention discloses a method for calibrating high-pressure flow meters of water injection wells in oil fields in an online manner. The method includes steps of modifying flow paths; calibrating the high-pressure flow meters; recovering the flow paths. The step for modifying the flow paths includes replacing filter elements in filters on branch lines of water distributing stations by standard flow meters; then calibrating the high-pressure flow meters; calibrating the multiple flow meters on the branch lines one by one by the aid of the standard flow meters by incremental calibration algorithms. The method has the advantages that the high-pressure flow meters in the water injection wells can be conveniently, accurately and quickly calibrated by the aid of the method in the online manner and do not need to be detached to be individually calibrated, and flow meter failure due to detachment and individual calibration of the high-pressure flow meters can be prevented.
Description
Technical field
The present invention relates to flow meter calibration technology, particularly a kind of online calibration method to water injection well in oil fields high-pressure flowmeter.
Background technology
The well head of water injection well in oil fields is generally all provided with water distributing station, as shown in Figure 1.After water distribution branch line enters water distributing station, through filtrator, by different high-pressure flowmeters to each well water filling.For obtaining higher oil recovery quality and efficiency, the water injection rate of each injection point must strictly control.For this reason, high-pressure flowmeter must be demarcated once at interval for three months, accurate to ensure its flow.Common way, after being split out from water distribution flow process by high-pressure flowmeter, delivers to standard detection platform and demarcate.This method energy flow meter carries out accurate calibration, but often causes flowmeter to lose efficacy because continuing when flowmeter returns installation to ensure sealing, causes any property loss and manpower waste.(slightly change because different work block bottom characteristic is different) between the water injection pressure 15-20MPa that reason is water distributing station, when high-pressure flowmeter sealing property after dismounting declines.The design improving flowmeter can address this problem, but the replacing of the well head flowmeter of the existing a large amount of water injection well in oil field is then quite huge investment.Directly discharge water from high-pressure flowmeter and also can demarcate, but troublesome poeration, reliability is low, also easily causes environmental pollution.The problem of calibrating of these flowmeters is urgently to be resolved hurrily.
Summary of the invention
Problem to be solved by this invention be to provide a kind of without the need to dismantling flowmeter, can not cause that environmental pollution just can be carried out accurately the high-pressure flowmeter of wellhead of water injection well, the method for on-line proving easily.
For reaching above object, the present invention takes following technical scheme to be achieved:
A method for water injection well in oil fields high-pressure flowmeter on-line proving, is characterized in that, comprises workflow reengineering, demarcation and flow process and recovers three steps, wherein:
The first step, workflow reengineering: close water distributing station feed water valve and Ge Lu high-pressure flowmeter valve, remove the filter core in filtrator, the proving flowmeter of an eddy currents is installed in former filter core position or the replacing structure that connects commercial standard flowmeter is installed, the high-pressure flowmeter of now water distributing station water supply by supplying each well head after proving flowmeter;
Second step, demarcate: progressively open water distributing station feed water valve, except being demarcated except high-pressure flowmeter, close the valve of other each road high-pressure flowmeter, regulate by the flow demarcating high-pressure flowmeter, get under each flow and once effectively measure, after effectively measuring for N time, the flow modificatory coefficient of this high-pressure flowmeter is:
In formula, K is flow modificatory coefficient, is demarcated the gauge outfit coefficient of high-pressure flowmeter according to this coefficient adjustment; Q
ifor i-th measured value of proving flowmeter; q
ifor by i-th displayed value of proving flowmeter; N is overall measurement number of times; After this has been demarcated by proving flowmeter, close this by the valve of proving flowmeter, and opened the valve of next flowmeter to be calibrated, repeated above step, until complete the demarcation of all flowmeters;
3rd step, flow process is recovered: removed from filtrator by the replacing structure of eddy currents proving flowmeter or connection commercial standard flowmeter, recover filter element, and recover water distributing station water filling flow process, recover normal water filling operating mode.
In said method, described eddy currents proving flowmeter, the inlet end of its core body is provided with inlet seal, and this core body inner flow passage is provided with eddy generator and vortex street sensor, and flow meter signal is by the flowmeter meter connecing dish input filter outside bottom core body; The by-pass port being communicated with filter outlet is established in core body bottom.
Described replacing structure sets out water pipe sealing at the filter inlet of former filter core upper end, and install new seal flange in former seal flange position, novel sealing flange is provided with rising pipe and return pipe; Wherein rising pipe is sealed with rising pipe by former filtration cartridge volume and is connected; Return pipe is communicated with filter outlet, and rising pipe water outlet and return pipe install commercially available proving flowmeter between intaking.
Compared with the conventional method, advantage of the present invention is, without the need to dismantling the high-pressure flowmeter in water distribution flow process, also can not discharge water from high-pressure flowmeter and cause environmental pollution, just utilize former filtrator carry out simple structure of modification install once boarding proving flowmeter can carry out fast the high-pressure flowmeter of wellhead of water injection well, accurately, on-line proving easily, the flowmeter inefficacy that the dismounting avoiding high-pressure flowmeter is separately and exclusively demarcated and caused thus, and it is easy to recover flow process, not only energy-saving and emission-reduction, but also significantly reduce calibration cost.
Accompanying drawing explanation
Fig. 1 is the general flow schematic diagram of existing water distributing station.
Fig. 2 is the water distributing station schematic flow sheet adopting the inventive method.
Fig. 3 is the inner structure of water distributing station conventional filters.
Fig. 4 is a kind of mode of the inventive method installation code flowmeter on Fig. 3 filtrator.
Fig. 5 is the another kind of mode of the inventive method installation code flowmeter on Fig. 3 filtrator.
In Fig. 1 to Fig. 5: 1, injection point; 2, high-pressure flowmeter; 3, water distribution branch line; 4, feed water valve; 5, filtrator; 6, proving flowmeter; 7, filter inlet; 8, filter outlet; 9, filter core; 10, seal flange; 11, inlet seal; 12, proving flowmeter core body; 13, vortex street sensor; 14, by-pass port; 15, dish is connect; 16, eddy generator; 17, rising pipe sealing; 18, rising pipe; 19, return pipe; 20, novel sealing flange.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Embodiment 1
With reference to figure 2 Fig. 3 and Fig. 4, the method for a kind of water injection well in oil fields high-pressure flowmeter on-line proving, comprises the following steps:
One, workflow reengineering
First the feed water valve 4 on closedown water distribution branch line 3 and the valve of high-pressure flowmeter 2, then remove the filter core 9 in filtrator 5 by dismounting seal flange 10; At former filter core position installation code flowmeter 6.Proving flowmeter 6 can adopt eddy currents flowmeter (Fig. 4).The inlet end of proving flowmeter core body 12 is provided with inlet seal 11, guarantees that the water under high pressure entering filtrator all flows into proving flowmeter; This core body 12 inner flow passage is provided with eddy generator 16 and vortex street sensor 13, and flow meter signal inputs gauge outfit by the dish 15 that connects bottom core body; Water under high pressure flows out from the by-pass port 14 of core body bottom, flows out from filter outlet 8.Now water distribution branch line supplies water by the high-pressure flowmeter 2 of each well head of supply after proving flowmeter 6.
Two, demarcate
Progressively open water distributing station feed water valve 4, except by except proving flowmeter, close the valve of other each road high-pressure flowmeter; Regulate by the flow of absolute altitude pressure type flowmeter, get and once effectively measure under each flow, after effectively measuring for N time, the flow modificatory coefficient of this high-pressure flowmeter is
In formula, K is flow regulation coefficient, adjusts the gauge outfit coefficient of this high-pressure flowmeter according to this flow regulation coefficient; Q
ifor i-th measured value of proving flowmeter 6; q
ifor i-th displayed value of measured stream gauge; N is overall measurement number of times.After this flow meter calibration completes, close the valve of this flowmeter, and open the next one and treat target flowmeter valve, repeat step 2, until complete the demarcation of all online flowmeters.
Three, flow process is recovered
Proving flowmeter is removed from filtrator, loads onto filter core 9, recover the original structure of filtrator, and recover water distributing station water filling flow process, recover normal water filling operating mode (Fig. 1).
Embodiment 2
With reference to figure 2 Fig. 3 and Fig. 5, the method for another kind of water injection well in oil fields high-pressure flowmeter on-line proving, comprises the following steps:
One, workflow reengineering
First the feed water valve 4 on closedown water distribution branch line 3 and the valve of high-pressure flowmeter 2, then remove the filter core 9 in filtrator 5 by dismounting seal flange 10; Set out water pipe sealing 17 at the filter inlet 7 of former filter core 9 upper end, install new seal flange 20 in former seal flange position, novel sealing flange is provided with rising pipe 18 and return pipe 19; Wherein rising pipe is sealed 17 with rising pipe be connected by former filtration cartridge volume, guarantees that the water under high pressure of inflow filter all flows out from rising pipe; Return pipe is communicated with filter outlet 8.Rising pipe water outlet and return pipe intake between installation code flowmeter 6, proving flowmeter can directly be chosen from the market; Water under high pressure flows back to filtrator from return pipe after proving flowmeter, flows out from filter outlet.Now water distribution branch line supplies water by each well head high-pressure flowmeter 2 of supply after proving flowmeter 6.
Two, demarcate
Identical with embodiment 1.
Three, flow process is recovered
Identical with embodiment 1.
Claims (3)
1. a method for water injection well in oil fields high-pressure flowmeter on-line proving, is characterized in that, comprises workflow reengineering, demarcation and flow process and recovers three steps, wherein:
The first step, workflow reengineering: close water distributing station feed water valve and Ge Lu high-pressure flowmeter valve, remove the filter core in filtrator, the proving flowmeter of an eddy currents is installed in former filter core position or the replacing structure that connects commercial standard flowmeter is installed, the high-pressure flowmeter of now water distributing station water supply by supplying each well head after proving flowmeter;
Second step, demarcate: progressively open water distributing station feed water valve, except being demarcated except high-pressure flowmeter, close the valve of other each road high-pressure flowmeter, regulate by the flow demarcating high-pressure flowmeter, get under each flow and once effectively measure, after effectively measuring for N time, the flow modificatory coefficient of this high-pressure flowmeter is:
In formula, K is flow modificatory coefficient, is demarcated the gauge outfit coefficient of high-pressure flowmeter according to this coefficient adjustment; Q
ifor i-th measured value of proving flowmeter; q
ifor by i-th displayed value of proving flowmeter; N is overall measurement number of times; After this has been demarcated by proving flowmeter, close this by the valve of proving flowmeter, and opened the valve of next flowmeter to be calibrated, repeated above step, until complete the demarcation of all flowmeters;
3rd step, flow process is recovered: removed from filtrator by the replacing structure of eddy currents proving flowmeter or connection commercial standard flowmeter, recover filter element, and recover water distributing station water filling flow process, recover normal water filling operating mode.
2. the method for water injection well in oil fields high-pressure flowmeter on-line proving as claimed in claim 1, it is characterized in that, described eddy currents proving flowmeter, the inlet end of its core body is provided with inlet seal, this core body inner flow passage is provided with eddy generator and vortex street sensor, and flow meter signal is by the flowmeter meter connecing dish input filter outside bottom core body; The by-pass port being communicated with filter outlet is established in core body bottom.
3. the method for water injection well in oil fields high-pressure flowmeter on-line proving as claimed in claim 1, it is characterized in that, described replacing structure sets out water pipe sealing at the filter inlet of former filter core upper end, install new seal flange in former seal flange position, novel sealing flange is provided with rising pipe and return pipe; Wherein rising pipe is sealed with rising pipe by former filtration cartridge volume and is connected; Return pipe is communicated with filter outlet, and rising pipe water outlet and return pipe install commercially available proving flowmeter between intaking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510066746.7A CN104634423B (en) | 2015-02-09 | 2015-02-09 | The method of water injection well in oil fields high-pressure flowmeter on-line proving |
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| CN201510066746.7A CN104634423B (en) | 2015-02-09 | 2015-02-09 | The method of water injection well in oil fields high-pressure flowmeter on-line proving |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153162A (en) * | 2016-08-31 | 2016-11-23 | 新奥科技发展有限公司 | Gas flowmeter detection equipment |
| CN106768209A (en) * | 2017-02-17 | 2017-05-31 | 中国石油化工股份有限公司 | Oil well watering digital flowmeter calibrator (-ter) unit and method |
| CN108331564A (en) * | 2018-02-13 | 2018-07-27 | 新疆石油工程设计有限公司 | Integrated automatic well-selecting on-line proving water dispensing apparatus |
| CN114942060A (en) * | 2022-05-26 | 2022-08-26 | 国家石油天然气管网集团有限公司 | A method for online verification of natural gas metering standard device |
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2015
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Patent Citations (8)
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| CN114942060A (en) * | 2022-05-26 | 2022-08-26 | 国家石油天然气管网集团有限公司 | A method for online verification of natural gas metering standard device |
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Effective date of registration: 20170711 Address after: 710119, room 110, building 66, West Avenue, new industrial park, hi tech Zone, Shaanxi, Xi'an Applicant after: XI'AN LANGWEI TECHNOLOGY CO., LTD. Applicant after: Wu Weifeng Applicant after: Li Xiaohua Address before: 710119, room 110, building 66, West Avenue, new industrial park, hi tech Zone, Shaanxi, Xi'an Applicant before: XI'AN LANGWEI TECHNOLOGY CO., LTD. |
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