CN113074788A - Gas-liquid two-phase flowmeter instrument field data acquisition method - Google Patents
Gas-liquid two-phase flowmeter instrument field data acquisition method Download PDFInfo
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- CN113074788A CN113074788A CN202110196391.9A CN202110196391A CN113074788A CN 113074788 A CN113074788 A CN 113074788A CN 202110196391 A CN202110196391 A CN 202110196391A CN 113074788 A CN113074788 A CN 113074788A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
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Abstract
The invention provides a method for acquiring field data of a gas-liquid two-phase flowmeter, which comprises the following steps: step 1) selecting a gas-liquid two-phase separator as a gas well field production metering and gas-liquid two-phase flowmeter calibration device, dismantling a pipe section in front of a well site output cut-off valve of a gas well production pipeline, and connecting the gas-liquid two-phase separator in series into a dismantling section; and 2) transmitting real-time metering data on a gas-liquid two-phase flowmeter in the gas-liquid two-phase separator, a gas phase instrument of the gas-liquid two-phase separator and a liquid phase instrument of the gas-liquid two-phase separator to a field data acquisition system in a well site data acquisition computer through a communication line and a cable. The invention has the advantages of simple implementation, convenient disassembly and assembly and connection of each unit, low realization cost, convenient and understandable visual and graphical monitoring interface and convenient field test and analysis.
Description
Technical Field
The invention belongs to the technical field of gas field metering instruments, and particularly relates to a method for acquiring field data of a gas-liquid two-phase flowmeter instrument.
Background
The Su-Li-Ge gas field mostly adopts the processes of inter-well series connection and well head moisture metering, and the dynamic analysis and fine management level of the gas well are restricted because the liquid production amount of a single well cannot be measured. In order to master the liquid production condition of the gas field well, a skid-mounted separation metering device is adopted for mobile testing on the site. But the skid-mounted separator is complex in measurement and test construction and high in cost; the device cannot be installed on a wellhead for a long time, and particularly when the temperature is low in winter, liquid phase frozen plugging is easy to generate, so that safety risk exists; in addition, the separated metering can only realize the metering of a part of wells for a period of time, cannot realize the fine management requirement of the gas field, cannot effectively master the real-time production dynamic state of the gas field, and cannot effectively evaluate the effect of drainage and gas production measures in time. Aiming at the current situation, the research on the gas-liquid two-phase flow online metering technology is carried out, and the better progress is achieved under the indoor working condition, but the working condition is limited under the laboratory condition. In addition, along with the continuous development of gas fields, the yield of gas wells is gradually reduced, most gas wells need drainage and gas production measures such as foam drainage and plunger, the effluent of the gas wells mainly takes unstable flow states such as slug flow and the like, and the gas-liquid two-phase online metering of the gas wells is difficult in the prior art. In order to further understand the gas-liquid two-phase change rule of the field actual working condition and make up the shortage of the indoor gas-liquid two-phase online metering working condition, the real-time data acquisition of the field working condition and the actual calibration of the gas-liquid two-phase flowmeter are required.
Disclosure of Invention
The invention aims to provide a method for acquiring field data of a gas-liquid two-phase flowmeter, which solves the problems that in the prior art, a gas phase of a field gas-liquid two-phase separator cannot be acquired and collected in real time, a liquid phase cannot be acquired electronically, and the data of a gas-liquid two-phase flowmeter cannot be stored for a long time, so that the metering results cannot be compared in real time. The invention has the advantages of simple implementation, convenient disassembly and assembly and connection of each unit, low realization cost, convenient and understandable visual and graphical monitoring interface and convenient field test and analysis.
The technical scheme adopted by the invention is as follows:
a gas-liquid two-phase flowmeter instrument field data acquisition method comprises the following specific steps:
step 1) selecting a gas-liquid two-phase separator as a gas well field production metering and gas-liquid two-phase flowmeter calibration device, dismantling a pipe section in front of a well site output cut-off valve of a gas well production pipeline, and connecting the gas-liquid two-phase separator in series into a dismantling section;
and 2) transmitting real-time metering data on a gas-liquid two-phase flowmeter, a gas-phase instrument of the gas-liquid two-phase separator and a liquid-phase instrument of the gas-liquid two-phase separator in the gas-liquid two-phase separator to a well site data acquisition computer through a communication line and a cable by using the field data acquisition system.
The field data acquisition system runs in a well site data acquisition computer.
In the step 2), the field data acquisition system at least comprises a communication protocol analysis module, a gas-liquid two-phase display module and a gas-liquid two-phase data storage module; the three modules are respectively connected with an electric signal.
The communication protocol analysis module runs in a background to complete the analysis of the communication protocols of a gas-phase instrument, a liquid-phase liquid level meter and a gas-liquid two-phase flow meter of the gas-liquid two-phase separator, and realize the analysis of parameters of differential pressure, temperature, gas phase flow and liquid phase flow and the control of acquisition frequency; the gas-liquid two-phase display module completes human-computer interaction and execution process monitoring; the gas-liquid two-phase data storage module realizes the timing storage of each acquired parameter.
The gas-liquid two-phase flow meter in the gas-liquid two-phase separator comprises a gas phase flow meter and a liquid level meter.
The gas phase flowmeter in the gas-liquid two-phase separator meets the requirement of field measurement range, and the liquid level meter in the gas-liquid two-phase separator realizes the liquid level height measurement of the separator and converts the measured liquid level height into liquid phase flow.
The gas phase flowmeter and the liquid level meter are connected in series and then are connected to the front end of the gas-liquid two-phase separator.
The liquid level meter is a magnetic induction electronic liquid level meter.
The gas-liquid two-phase separator is a multi-tube-bundle gas-liquid two-phase separator.
In the step 2), the communication line is an RS485 communication line.
The invention has the beneficial effects that:
the gas-liquid two-phase separator is connected in series to the production flow, a gas phase flowmeter of the gas-liquid two-phase separator meets the requirement of measuring range on site, a liquid level meter in the gas-liquid two-phase separator realizes the liquid level height measurement of the separator, and the liquid level height is converted into liquid phase flow through the measurement. The invention has the advantages of simple implementation, convenient disassembly and assembly and connection of each unit, low realization cost, convenient and understandable visual and graphical monitoring interface and convenient field test and analysis.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of field data acquisition in the present invention.
Detailed Description
Example 1:
the invention aims to provide a method for acquiring field data of a gas-liquid two-phase flowmeter instrument as shown in the figure, and the method solves the problems that in the prior art, a gas phase of a field gas-liquid two-phase separator cannot be acquired and collected in real time, a liquid phase cannot be acquired electronically, and the data of the gas-liquid two-phase flowmeter cannot be stored for a long time, so that the metering result cannot be compared in real time. The invention has the advantages of simple implementation, convenient disassembly and assembly and connection of each unit, low realization cost, convenient and understandable visual and graphical monitoring interface and convenient field test and analysis.
A gas-liquid two-phase flowmeter instrument field data acquisition method comprises the following specific steps:
step 1) selecting a gas-liquid two-phase separator as a gas well field production metering and gas-liquid two-phase flowmeter calibration device, dismantling a pipe section in front of a well site output cut-off valve of a gas well production pipeline, and connecting the gas-liquid two-phase separator in series into a dismantling section;
and 2) transmitting real-time metering data on a gas-liquid two-phase flowmeter, a gas-phase instrument of the gas-liquid two-phase separator and a liquid-phase instrument of the gas-liquid two-phase separator in the gas-liquid two-phase separator to a well site data acquisition computer through a communication line and a cable by using the field data acquisition system.
The field data acquisition system runs in a well site data acquisition computer.
The gas-liquid two-phase separator is connected in series to the production flow, a gas phase flowmeter of the gas-liquid two-phase separator meets the requirement of measuring range on site, a liquid level meter in the gas-liquid two-phase separator realizes the liquid level height measurement of the separator, and the liquid level height is converted into liquid phase flow through the measurement. One or more gas-liquid two-phase flow meters are sequentially connected to the front end of the gas-liquid two-phase separator in series, and finally the gas-liquid two-phase flow meters are connected to the rear end of the gas well shut-off valve in series. Namely, the testing process comprises a gas well wellhead block valve- > a gas-liquid two-phase flowmeter- > a gas-liquid two-phase separator- > a gas field well site external transportation block valve.
The gas-liquid two-phase separator is connected to the downstream of the gas-liquid two-phase flowmeter, so that gas-liquid two-phase separation in a gas well gas-liquid two-phase flow is realized, single-phase separation of a gas well gas-liquid two-phase mixed medium is completed, a gas phase enters a subsequent production pipeline and continues to perform a subsequent production flow, and a liquid phase is stored in the separator after being separated, so that single-phase measurement of the gas-liquid two-phase is realized. Wherein, the gas phase measurement is realized by a single-phase flowmeter, and the measurement data of the flowmeter provides a remote transmission communication interface; the liquid phase is metered by a liquid level meter to be accumulated, and the liquid phase is metered by 4-20mA for remote transmission. The gas phase is communicated with a remote place through a 485 interface, and the liquid phase is connected with the remote place through a cable.
Example 2:
based on the embodiment 1, in the present embodiment, in the step 2), the field data acquisition system at least includes a communication protocol analysis module, a gas-liquid two-phase display module, and a gas-liquid two-phase data storage module; the three modules are respectively connected with an electric signal.
The communication protocol analysis module runs in a background to complete the analysis of the communication protocols of a gas-phase instrument, a liquid-phase liquid level meter and a gas-liquid two-phase flow meter of the gas-liquid two-phase separator, and realize the analysis of parameters of differential pressure, temperature, gas phase flow and liquid phase flow and the control of acquisition frequency; the gas-liquid two-phase display module completes human-computer interaction and execution process monitoring; the gas-liquid two-phase data storage module realizes the timing storage of each acquired parameter.
Preferably, in the step 2), the communication line is an RS485 communication line.
The data communication part of the field data acquisition system adopts a 485-to-USB interface, and is accessed to an acquisition platform through the USB interface, so that one or more paths of signals are uniformly acquired; the near end of the data acquisition platform is provided with a 4-20 mA-to-485 conversion unit, and the conversion unit is attached with an electronic display screen and can observe a sampling value locally. The data acquisition platform in the field data acquisition system is realized by adopting a Labview visual program, 485 channels of data acquisition protocols are analyzed by an upper computer platform, and in addition, the real-time display of multiple channels of acquired signals, the display of data curves, the real-time display of errors, the real-time acquisition of pressure, differential pressure, temperature, gas-liquid two-phase flow and the like are realized.
Preferably, the gas-liquid two-phase flow meter in the gas-liquid two-phase separator comprises a gas phase flow meter and a liquid level meter.
Preferably, the gas phase flowmeter in the gas-liquid two-phase separator meets the requirement of field measurement range, and the liquid level meter in the gas-liquid two-phase separator realizes the liquid level height measurement of the separator and converts the measured liquid level height into liquid phase flow.
Preferably, the gas phase flowmeter and the liquid level meter are connected in series and then connected to the front end of the gas-liquid two-phase separator.
In the invention, the gas-liquid two-phase separator is connected at the downstream of the gas-liquid two-phase flowmeter, so that gas-liquid two-phase separation in a gas well gas-liquid two-phase flow is realized, single-phase separation of a gas well gas-liquid two-phase mixed medium is completed, a gas phase enters a subsequent production pipeline and continues to perform a subsequent production flow, and a liquid phase is stored in the separator after being separated, so that single-phase measurement of the gas-liquid two-phase is realized.
Preferably, the gas-liquid two-phase separator is a multi-tube-bundle gas-liquid two-phase separator.
The multi-tube-bundle gas-liquid two-phase separator is adopted, so that the number of the tube bundles can be selected according to the flow, and the on-off valve entering the separation tube is determined to be opened or closed according to the flow, so that the optimal separation effect can be achieved. Meanwhile, compared with a single-pipe separator, the separator has better settling separation effect. The multi-tube-bundle gas-liquid two-phase separator adopts a multi-tube-bundle tube column type cyclone separator, wherein the diameter of a single tube in a multi-tube bundle is 125mm, the multi-tube-bundle gas-liquid two-phase separator does not belong to a pressure vessel, annual inspection is not needed, and potential safety hazards are small.
Preferably, the liquid level meter is a magnetic induction electronic liquid level meter.
The magnetic induction electronic liquid level meter is selected because the magnetic induction electronic liquid level meter has wide application range and various installation forms, is suitable for measuring the liquid level and the interface of any medium and can display on site; the performance is stable and reliable, the anti-interference ability is strong, the structure is simple, the installation is convenient and the maintenance cost is low.
As shown in fig. 1, the specific acquisition process of the present invention is:
firstly, selecting a multi-tube-bundle gas-liquid two-phase separator as a gas well field production metering and gas-liquid two-phase flowmeter calibration device, dismantling a tube section in front of a wellsite output cut-off valve of a gas well production pipeline, and connecting the multi-tube-bundle gas-liquid two-phase separator in series to a subsequent pipeline to perform a subsequent production flow. The gas-liquid two-phase separator is provided with a gas phase flowmeter with high precision, the precision of the gas phase flowmeter needs to meet the requirement of field measurement range, the magnetic induction electronic liquid level meter realizes the liquid level height measurement of the separator, and the liquid level flow is converted into liquid phase flow through the measurement of the liquid level height. One or more gas-liquid two-phase flow meters are sequentially connected to the front end of the liquid-liquid two-phase separator in series, and finally the gas-liquid two-phase flow meters are connected to the rear end of the gas well shut-off valve in series. Namely, the testing process comprises a gas well wellhead block valve- > a gas-liquid two-phase flowmeter- > a gas-liquid two-phase separator- > a gas field well site external transportation block valve.
And secondly, real-time metering data of the gas-liquid two-phase flowmeter, the gas-liquid two-phase separator gas-phase instrument and the gas-liquid two-phase separator liquid-phase instrument are transmitted to the well site data acquisition computer through the RS485 communication line and the cable. The signal of the liquid level meter of the gas-liquid two-phase separator needs to pass through a signal conversion module, the signal conversion module is used for converting 4-20mA into RS485 signals, the signal conversion module contains a liquid phase volume and height corresponding table of the gas-liquid two-phase separator, so that conversion from liquid level height difference to liquid phase volume difference is completed, liquid phase flow in unit time can be obtained according to the acquisition time difference, and the signal conversion module also realizes a standard modbus protocol, so that the communication function with an acquisition computer is realized. The signal conversion module also provides an electronic display screen for actual observation of field experimenters.
And the field data acquisition system runs on a common computer and consists of a communication protocol analysis single module, a gas-liquid two-phase display module and a gas-liquid two-phase data storage module. The specific realization functions of the modules are as follows:
1. the communication protocol analysis module runs in the background to complete the analysis of the communication protocols of the gas-phase instrument, the liquid-phase liquid level meter and the gas-liquid two-phase flow meter of the gas-liquid two-phase separator, realize the analysis of parameters such as differential pressure, temperature, gas-phase flow, liquid-phase flow and the like, and control of acquisition frequency.
2. The gas-liquid two-phase display module completes human-computer interaction and performs process monitoring. The method comprises the steps of displaying real-time acquired data of temperature, pressure and gas phase flow parameters of a gas-phase instrument of a gas-liquid two-phase separator, displaying real-time acquired data of liquid level height and liquid phase flow of a liquid-phase instrument of the gas-liquid two-phase separator, and displaying real-time acquired data of differential pressure, temperature, gas phase flow and liquid phase flow of a gas-liquid two-phase flowmeter; displaying real-time gas phase and liquid phase flow comparison error data of the gas-liquid two-phase flow meter; and displaying a gas phase and liquid phase collecting data change trend curve of the gas-liquid two-phase separator and the gas-liquid two-phase flowmeter, and automatically rolling a collecting interval and displaying the proportion according to the collecting data. A gas-liquid two-phase separator, a gas-liquid two-phase flowmeter acquisition port number and a data access path are arranged. And controlling the starting and stopping of sampling.
3. And the gas-liquid two-phase data storage module finishes the timing storage of each acquisition parameter. Each piece of data acquisition and storage data comprises gas phase instantaneous flow of the gas-liquid two-phase separator, liquid phase instantaneous flow of the gas-liquid two-phase separator, gas phase instantaneous flow of the gas-liquid two-phase flowmeter, instantaneous liquid quantity of the gas-liquid two-phase flowmeter, instantaneous pressure of the gas-liquid two-phase flowmeter, instantaneous temperature of the gas-liquid two-phase flowmeter, differential pressure of the gas-liquid two-phase flowmeter, instantaneous gas phase comparison error of the gas-liquid two-phase flowmeter and instantaneous liquid phase comparison. And a plurality of pieces of acquired data are sequentially written into the excel table according to the sequence of the acquisition time points, the data acquisition sequence is provided with an acquisition serial number mark, and the acquisition needs to be increased sequentially.
In the application of the method in actual production, the gas-liquid two-phase flowmeter and the gas-liquid two-phase separator are connected in series and in the process on site, so that online real-time acquisition and monitoring under the same gas-liquid two-phase actual working condition of the gas well are realized, and the shortage of indoor work is made up. The gas phase and the liquid phase of the gas-liquid two-phase separator and the gas phase and the liquid phase of the gas-liquid two-phase flowmeter are collected in a unified and real-time manner, so that the gas-water ratio of production is analyzed by finding out the gas production and liquid production rules of the production well, and the gas-liquid two-phase separator and the gas-liquid two-phase flowmeter are collected to provide a basis for error analysis and calibration and correction of the flowmeter. The invention has the advantages of simple implementation, convenient disassembly and assembly and connection of each unit, low realization cost, convenient and understandable visual and graphical monitoring interface and convenient field test and analysis. The invention is particularly suitable for field test and effect comparison of the gas-liquid two-phase flowmeter.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims. The structural components and methods and systems not described in detail in this embodiment are well known in the art and are not necessarily described herein.
Claims (10)
1. A gas-liquid two-phase flowmeter instrument field data acquisition method is characterized by comprising the following steps: the method comprises the following specific steps:
step 1) selecting a gas-liquid two-phase separator as a gas well field production metering and gas-liquid two-phase flowmeter calibration device, dismantling a pipe section in front of a well site output cut-off valve of a gas well production pipeline, and connecting the gas-liquid two-phase separator in series into a dismantling section;
and 2) transmitting real-time metering data on a gas-liquid two-phase flowmeter, a gas-phase instrument of the gas-liquid two-phase separator and a liquid-phase instrument of the gas-liquid two-phase separator in the gas-liquid two-phase separator to a well site data acquisition computer through a communication line and a cable by using the field data acquisition system.
2. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 1, wherein the method comprises the following steps: the field data acquisition system runs in a well site data acquisition computer.
3. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 1, wherein the method comprises the following steps: in the step 2), the field data acquisition system at least comprises a communication protocol analysis module, a gas-liquid two-phase display module and a gas-liquid two-phase data storage module; the three modules are respectively connected with an electric signal.
4. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 3, wherein the method comprises the following steps: the communication protocol analysis module runs in a background to complete the analysis of the communication protocols of a gas-phase instrument, a liquid-phase liquid level meter and a gas-liquid two-phase flow meter of the gas-liquid two-phase separator, and realize the analysis of parameters of differential pressure, temperature, gas phase flow and liquid phase flow and the control of acquisition frequency; the gas-liquid two-phase display module completes human-computer interaction and execution process monitoring; the gas-liquid two-phase data storage module realizes the timing storage of each acquired parameter.
5. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 1, wherein the method comprises the following steps: the gas-liquid two-phase flow meter in the gas-liquid two-phase separator comprises a gas phase flow meter and a liquid level meter.
6. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 5, wherein the method comprises the following steps: the gas phase flowmeter in the gas-liquid two-phase separator meets the requirement of field measurement range, and the liquid level meter in the gas-liquid two-phase separator realizes the liquid level height measurement of the separator and converts the measured liquid level height into liquid phase flow.
7. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 5, wherein the method comprises the following steps: the gas phase flowmeter and the liquid level meter are connected in series and then are connected to the front end of the gas-liquid two-phase separator.
8. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 5, wherein the method comprises the following steps: the liquid level meter is a magnetic induction electronic liquid level meter.
9. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 1, wherein the method comprises the following steps: the gas-liquid two-phase separator is a multi-tube-bundle gas-liquid two-phase separator.
10. The method for acquiring the field data of the gas-liquid two-phase flowmeter and meter according to claim 1, wherein the method comprises the following steps: in the step 2), the communication line is an RS485 communication line.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2293903A1 (en) * | 1999-01-13 | 2000-07-13 | Intevep, S.A. | Method and apparatus for determining real time liquid and gas phase flow rates |
| CN104075766A (en) * | 2014-06-19 | 2014-10-01 | 西安交通大学 | Pipe internal-phase separation type high-gas-containing-rate gas-liquid two-phase fluid flow measurement device and method |
| CN107101681A (en) * | 2017-05-19 | 2017-08-29 | 西安交通大学 | Based on the biphase gas and liquid flow flow measurement device and method mutually separated with image procossing |
| CN111912500A (en) * | 2020-08-05 | 2020-11-10 | 成都洋湃科技有限公司 | Mobile wellhead flow calibration device and calibration method thereof |
| CN212228187U (en) * | 2020-08-05 | 2020-12-25 | 成都洋湃科技有限公司 | Remove well head flow calibration device |
-
2021
- 2021-02-22 CN CN202110196391.9A patent/CN113074788A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2293903A1 (en) * | 1999-01-13 | 2000-07-13 | Intevep, S.A. | Method and apparatus for determining real time liquid and gas phase flow rates |
| CN104075766A (en) * | 2014-06-19 | 2014-10-01 | 西安交通大学 | Pipe internal-phase separation type high-gas-containing-rate gas-liquid two-phase fluid flow measurement device and method |
| CN107101681A (en) * | 2017-05-19 | 2017-08-29 | 西安交通大学 | Based on the biphase gas and liquid flow flow measurement device and method mutually separated with image procossing |
| CN111912500A (en) * | 2020-08-05 | 2020-11-10 | 成都洋湃科技有限公司 | Mobile wellhead flow calibration device and calibration method thereof |
| CN212228187U (en) * | 2020-08-05 | 2020-12-25 | 成都洋湃科技有限公司 | Remove well head flow calibration device |
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Application publication date: 20210706 |