CN104989374A - Device and method for metering rod pumped well liquid quantity on line on basis of differential pressure method - Google Patents
Device and method for metering rod pumped well liquid quantity on line on basis of differential pressure method Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 21
- 239000003129 oil well Substances 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 6
- 230000008447 perception Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The invention discloses a device for metering the rod pumped well liquid quantity on line on the basis of a differential pressure method. The device comprises a first screw pump well and a second screw pump well, wherein a first differential pressure measuring device is arranged in a position of the first screw pump well, and a second differential pressure measuring device is arranged in a position of the second screw pump well; the first differential pressure measuring device and the second differential pressure measuring device are connected to sensing measuring equipment; the sensing measuring equipment is connected to a data collecting device arranged in an RTU (Remote Terminal Unit) control cabinet through a communication module; the data collecting device transfers collected data to a host computer through DTU (Data Transfer Unit) equipment; and the host computer is connected to a client through a server. The invention also provides a method for metering the rod pumped well liquid quantity on line on the basis of the differential pressure method. The method comprises the following steps that: 1, the first differential pressure measuring device and the second differential pressure measuring device are used for collecting required production data, wherein collecting parameters include the pressure difference, the hydrostatic pressure, the pressure ratio and the like; 2, the collected data is uploaded to the host computer through CDMA (Code Division Multiple Access) and GPRS (General Packet Radio Service) wireless communication unit via the RTU control cabinet; and 3, the host computer builds a wellhead multi-phase fluid flow rate calculation model, and the flow-out coefficient and the expandable coefficient of the multi-phase fluid can be calculated.
Description
Technical field
The invention belongs to oilfield information technical field, be specifically related to a kind of device and method based on the non-rod-pumped well liquid measure of differential pressure method on-line metering.
Background technology
Since oil field " Four Modernizations " building-up work is carried out, non-rod-pumped well liquid volume measurement is good on-line metering mode never, for on-line metering precision and the fine-grained management level of raising electric pump well, the second screw bolt well, in conjunction with related ends and the experience of the first screw bolt well, the online liquid volume measurement work of the second screw bolt well, carry out the first screw bolt well, the online liquid volume measurement research work of the second screw bolt well further, the stability of electric submersible pump, the second screw bolt well liquid producing amount measure and error are tested.
Micro-pressure-difference method electric pump, screw pump measurement technology is set up by research, find applicable oil field geologic, engineering characteristics without the functions such as oil nozzle electric pump, the second screw bolt well Liquid output calculating, Diagnosis of Work Conditions, system loss and system effectiveness calculates, working condition Rationality Assessment in one theoretical method, select representational blocks of cells, carry out studying, on-the-spot test, effect assessment, and by calculating, analyzing, sum up, improve and revise Related Mathematical Models, improve certainty of measurement, solution is rod-pumped well on-line metering problem by no means.
Summary of the invention
For solving above-mentioned prior art defect, the object of the present invention is to provide a kind of device based on the non-rod-pumped well liquid measure of differential pressure method on-line metering, comprise the first screw bolt well and the second screw bolt well, it is characterized in that: described first screw bolt well and the second screw bolt well place are respectively arranged with the first differential pressure measuring installation and the second differential pressure measuring installation, first differential pressure measuring installation and the second differential pressure measuring installation are connected to perception measureing equipment, perception measureing equipment is connected to the data acquisition unit arranged in RTU switch board by communication module, the data collected are delivered to host computer by DTU equipment by data acquisition unit, host computer is connected to client by server.
Wherein, described communication module is provided with CDMA and GPRS radio communication unit.
Described DTU equipment is provided with CDMA and GPRS radio communication unit.
Described client is computer.
Present invention also offers a kind of method of measurement based on the non-rod-pumped well liquid measure of differential pressure method on-line metering, comprise following steps:
Step 1, the creation data needed for the first differential pressure measuring installation and the second differential pressure measuring installation gather, acquisition parameter comprises the parameters such as pressure reduction, hydrostatic pressure, pressure ratio;
Step 2, the data of collection are uploaded to host computer through RTU switch board by CDMA and GPRS radio communication unit;
Step 3, host computer is set up well head multiphase flow rate and is calculated model, the efflux coefficient of heterogeneous fluid, inflatable coefficient are calculated, and by the mode such as temperature-compensating, pressure compensation,, oil density moisture in conjunction with every mouthful of well and production gas-oil ratio carry out the related operation such as viscosity, hybrid density parameter to multinomial fluid and accurately revise, and finally calculate according to multiphase flow throttle-flow the Liquid output that model accurately calculates electric pump well under different water cut, different gas-oil ratio condition and the second screw bolt well.
One as above non-rod-pumped well on-line metering method, described step 3 host computer is set up well head multiphase flow rate calculating model and is:
In formula:
The volume flow of Q-fluid, [m3/d]; The volume flow of total fluid (under the operating mode);
The expansibility factor of-measured medium, for liquid; To gas, steam, dissolving wet goods compressible fluid,
The equivalent opening diameter of differential pressure gauge under d-working condition, [mm];
△ P-throttling differential pressure, i.e. oil pressure-back pressure, △ P=P1-P2, [MPa];
Under-working condition, the density of upstream end fluid before throttling, [kg/m3];
C-efflux coefficient, dimensionless;
β-diameter ratio, dimensionless, β=d/D;
D-pipeline diameter, [mm];
The isentropic index of k-natural gas;
The absolute static pressure of pressure port place, differential pressure gauge upstream compressible fluid under-operating mode, both oil pressure of oil well, MPa;
-online compensation coefficient (according to observed temperature, pressure, fluid properties in line computation).
Beneficial effect of the present invention is:
1. adopt differential pressure gauge to carry out pressure reduction mensuration, the pressure loss is little, wellhead back pressure will be caused significantly to raise because of installation differential manometer, affect oil well output.
2. adopt differential pressure measuring principle, avoid pressure reversion and Zero drift in main amplifier.
3. differential pressure method is to the heterogeneous fluid flowing through device, for the impact of different fluid Reynolds number convection cell efflux coefficient and inflatable coefficient, thus accurately carries out corrected Calculation to efflux coefficient and inflatable coefficient; Metering model has solid physical theory basis, and the scope of application does not limit substantially;
4. the method considers different water cut, different gas-oil ratio affects the liquid producing amount measure of electric pump well second screw bolt well, be suitable for the liquid producing amount measure of electric pump well under different water cut, different gas-oil ratio condition and the second screw bolt well, the variation tendency of Liquid output can be reflected in time;
5. the data such as moisture, oil density, viscosity, production gas-oil ratio (even if not knowing that production gas-oil ratio also can replace by block dissolved gas oil ratio) are all inputted by every mouthful of well, calculate the physical parameters such as heterogeneous fluid hybrid density more accurately, and by online temperature-compensating, pressure compensated method to the accurate correction of heterogeneous fluid physical parameter, calculation compensation coefficient, thus improve liquid producing amount measure precision further.
6. without in demarcation situation, the error of calculation without oil nozzle well of more than 90% can ensure within 10%; Accuracy in computation can be improved further by demarcating;
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic network structure of embodiment of the present invention Data acquisition and transmit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated.
Embodiment 1
As shown in Figure 1, a kind of based on differential pressure method on-line metering non-rod-pumped well liquid measure device, comprise the first screw bolt well 1 and the second screw bolt well 2, described first screw bolt well 1 and the second screw bolt well 2 place are respectively arranged with the first differential pressure measuring installation 3 and the second differential pressure measuring installation 4, first differential pressure measuring installation 3 and the second differential pressure measuring installation 4 are connected to perception measureing equipment 5, perception measureing equipment 5 is connected to the data acquisition unit 7 arranged in RTU switch board 11 by communication module 6, the data collected are delivered to host computer 9 by DTU equipment 8 by data acquisition unit 7, host computer 9 is connected to client 12 by server 10.
By installing the first differential pressure measuring installation 3 and the second differential pressure measuring installation 4 at the first screw bolt well 1 and the second screw bolt well 2 well head, the creation data needed for collection, acquisition parameter comprises the parameters such as pressure reduction, hydrostatic pressure, pressure ratio.According to the demand to data transmission of this test job, well site communication hardware configuration adopts CDMA/GPRS wireless way for transmitting scheme as shown in Figure 2, collection in worksite data-RTU switch board 11-CDMA/GPRS wireless mode transmission-host computer 9-server 10-database-measuring software system.
Present invention also offers a kind of method based on the non-rod-pumped well liquid measure of differential pressure method on-line metering, comprise following steps:
Step 1, gather required creation data by the first differential pressure measuring installation 3 and the second differential pressure measuring installation 4, acquisition parameter comprises the parameters such as pressure reduction, hydrostatic pressure, pressure ratio;
Step 2, the data of collection are uploaded to host computer 9 through RTU switch board 11 by CDMA and GPRS radio communication unit;
Step 3, host computer is set up well head multiphase flow rate and is calculated model, the efflux coefficient of heterogeneous fluid, inflatable coefficient are calculated, and by the mode such as temperature-compensating, pressure compensation,, oil density moisture in conjunction with every mouthful of well and production gas-oil ratio carry out the related operation such as viscosity, hybrid density parameter to multinomial fluid and accurately revise, and finally calculate according to multiphase flow throttle-flow the Liquid output that model accurately calculates electric pump well under different water cut, different gas-oil ratio condition and the second screw bolt well.
A kind of method of measurement as above, described step 3 host computer is set up well head multiphase flow rate calculating model and is:
In formula:
The volume flow of Q-fluid, [m3/d]; The volume flow of total fluid (under the operating mode);
The expansibility factor of-measured medium, for liquid; To gas, steam, dissolving wet goods compressible fluid,
The equivalent opening diameter of differential pressure gauge under d-working condition, [mm];
△ P-throttling differential pressure, i.e. oil pressure-back pressure, △ P=P1-P2, [MPa];
Under-working condition, the density of upstream end fluid before throttling, [kg/m3];
C-efflux coefficient, dimensionless;
β-diameter ratio, dimensionless, β=d/D;
D-pipeline diameter, [mm];
The isentropic index of k-natural gas;
The absolute static pressure of pressure port place, differential pressure gauge upstream compressible fluid under-operating mode, both oil pressure of oil well, MPa;
-online compensation coefficient (according to observed temperature, pressure, fluid properties in line computation).
Its measuring principle is: by being arranged on the intelligent differential pressure metering device at well head place, accurately record pressure reduction, pressure, the parameters such as temperature, utilize Reader-Harris/Gallagher method to the efflux coefficient of heterogeneous fluid, inflatable coefficient calculates, and pass through temperature-compensating, the modes such as pressure compensation, moisture in conjunction with every mouthful of well, oil density and production gas-oil ratio carry out viscosity to multinomial fluid, the related operation parameters such as hybrid density are accurately revised, finally calculate model according to multiphase flow throttle-flow and accurately calculate different water cut, the first screw bolt well 1 under different gas-oil ratio condition and the Liquid output of the second screw bolt well 2.
Embodiment 2
Below flat 1 electric pump of river 31-, oblique 137 electric pumps of river 31-, oblique 138 electric pumps of river 31-and the oblique 113 screw pump system continuous datas of river 4-and manual gaging from 2014/12/29 to 2015/1/8 Data Comparison figure, wherein, the following formula of system meters data acquisition:
In formula:
The volume flow of Q-fluid, [m3/d]; The volume flow of total fluid (under the operating mode);
The expansibility factor of-measured medium, for liquid; To gas, steam, dissolving wet goods compressible fluid,
The equivalent opening diameter of differential pressure gauge under d-working condition, [mm];
△ P-throttling differential pressure, i.e. oil pressure-back pressure, △ P=P1-P2, [MPa];
Under-working condition, the density of upstream end fluid before throttling, [kg/m3];
C-efflux coefficient, dimensionless;
β-diameter ratio, dimensionless, β=d/D;
D-pipeline diameter, [mm];
The isentropic index of k-natural gas;
The absolute static pressure of pressure port place, differential pressure gauge upstream compressible fluid under-operating mode, both oil pressure of oil well, MPa;
-online compensation coefficient (according to observed temperature, pressure, fluid properties in line computation).
Above data provide by China Petrochemical Industry, from upper contrast,
1, can measure without the need to installing oil nozzle;
2, measuring accuracy basic controlling is within 10%;
Embodiment 3
Embodiment 3 provides easy method of measurement according to embodiment 1 and embodiment 2:
The oil well of Liquid output below 5, take 3 tank cars or the metering of other measuring equipment, the continuous metering time must not be less than 8h, and oil, the well that gas fluctuation is larger, can extend Dose times to 8 ~ 24h; It is consistent with Oil Well Back Pressure that metering pressure controls needs, and controlled pressure error is less than 2%; The liquid measured adopts weight method metering Liquid output.This type of well needs continuous metering three times.
Liquid output 5 ~ 20 oil well, fluid stablizes well, adopt eliminator metering, 10 tank cars or other measuring equipment metering, the continuous metering time must not be less than 4h; It is consistent with Oil Well Back Pressure that metering pressure controls needs, and measure control pressure error is less than 2%.
Liquid output is at the large oil well of 5 ~ 20 fluctuations, and adopt 10 tank cars or the metering of other measuring equipment, the continuous metering time must not be less than 4h; It is consistent with Oil Well Back Pressure that metering pressure controls needs, and measure control pressure error is less than 2%.
The oil well of Liquid output more than 20, adopt eliminator metering, 10 tank cars or the metering of other measuring equipment, the continuous metering time must not be less than 4h; It is consistent with Oil Well Back Pressure that metering pressure controls needs, and measure control pressure error is less than 2%.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (6)
1. the device based on the non-rod-pumped well liquid measure of differential pressure method on-line metering, comprise the first screw bolt well (1) and the second screw bolt well (2), it is characterized in that: described first screw bolt well (1) and the second screw bolt well (2) place are respectively arranged with the first differential pressure measuring installation (3) and the second differential pressure measuring installation (4), first differential pressure measuring installation (3) and the second differential pressure measuring installation (4) are connected to perception measureing equipment (5), perception measureing equipment (5) is connected to the data acquisition unit (7) arranged in RTU switch board (11) by communication module (6), the data collected are delivered to host computer (9) by DTU equipment (8) by data acquisition unit (7), host computer (9) is connected to client (12) by server (10).
2. a kind of device based on the non-rod-pumped well liquid measure of differential pressure method on-line metering according to claim 1, is characterized in that: described communication module (6) is provided with CDMA and GPRS radio communication unit.
3. a kind of device based on the non-rod-pumped well liquid measure of differential pressure method on-line metering according to claim 1, is characterized in that: described DTU equipment (8) is provided with CDMA and GPRS radio communication unit.
4. a kind of device based on the non-rod-pumped well liquid measure of differential pressure method on-line metering according to claim 1, is characterized in that: described client (12) is computer.
5., according to a kind of method based on the non-rod-pumped well liquid measure of differential pressure method on-line metering described in claim 1 to 4, it is characterized in that: comprise following steps:
Step 1, the creation data needed for the first differential pressure measuring installation (3) and the second differential pressure measuring installation (4) gather, acquisition parameter comprises the parameters such as pressure reduction, hydrostatic pressure, pressure ratio;
Step 2, the data of collection are uploaded to host computer (9) through RTU switch board (11) by CDMA and GPRS radio communication unit;
Step 3, host computer (9) is set up well head multiphase flow rate and is calculated model, the efflux coefficient of heterogeneous fluid, inflatable coefficient are calculated, and by the mode such as temperature-compensating, pressure compensation,, oil density moisture in conjunction with every mouthful of well and production gas-oil ratio carry out the related operation such as viscosity, hybrid density parameter to multinomial fluid and accurately revise, and calculate according to multiphase flow throttle-flow the Liquid output that model accurately calculates electric pump well under different water cut, different gas-oil ratio condition and the second screw bolt well.
6. a kind of method based on the non-rod-pumped well liquid measure of differential pressure method on-line metering according to claim 5, is characterized in that: described step 3 host computer is set up well head multiphase flow rate calculating model and is:
In formula:
The volume flow of Q-fluid, [m3/d]; The volume flow of total fluid (under the operating mode);
The expansibility factor of-measured medium, for liquid; To gas, steam, dissolving wet goods compressible fluid,
The equivalent opening diameter of differential pressure gauge under d-working condition, [mm];
△ P-throttling differential pressure, i.e. oil pressure-back pressure, △ P=P1-P2, [MPa];
Under-working condition, the density of upstream end fluid before throttling, [kg/m3];
C-efflux coefficient, dimensionless;
β-diameter ratio, dimensionless, β=d/D;
D-pipeline diameter, [mm];
The isentropic index of k-natural gas;
The absolute static pressure of pressure port place, differential pressure gauge upstream compressible fluid under-operating mode, both oil pressure of oil well, MPa;
-online compensation coefficient (according to observed temperature, pressure, fluid properties in line computation).
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| CN201510363720.9A CN104989374A (en) | 2015-06-26 | 2015-06-26 | Device and method for metering rod pumped well liquid quantity on line on basis of differential pressure method |
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| CN201510363720.9A CN104989374A (en) | 2015-06-26 | 2015-06-26 | Device and method for metering rod pumped well liquid quantity on line on basis of differential pressure method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018172A (en) * | 2016-05-24 | 2016-10-12 | 南通市飞宇石油科技开发有限公司 | Method and apparatus for online detecting water and oil content in petroleum |
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Application publication date: 20151021 |