CN220118104U - Online measurement system for water content of wellhead production fluid of oil well - Google Patents
Online measurement system for water content of wellhead production fluid of oil well Download PDFInfo
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- CN220118104U CN220118104U CN202321542958.4U CN202321542958U CN220118104U CN 220118104 U CN220118104 U CN 220118104U CN 202321542958 U CN202321542958 U CN 202321542958U CN 220118104 U CN220118104 U CN 220118104U
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- 239000012530 fluid Substances 0.000 title claims abstract description 114
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000003129 oil well Substances 0.000 title claims abstract description 47
- 238000005259 measurement Methods 0.000 title claims abstract description 40
- 238000007493 shaping process Methods 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims description 16
- 239000012071 phase Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 12
- 239000012535 impurity Substances 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010219 correlation analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model discloses an oil well wellhead produced liquid water content online measurement system, which comprises a fluid shaping device, a radial differential pressure acquisition device, an axial differential pressure acquisition device and a data processing device, wherein the fluid shaping device is provided with three sets and is sequentially connected in a measurement pipeline between a produced liquid inlet and a produced liquid outlet; the two ends of the radial differential pressure acquisition device are respectively connected with the pressure taking port II and the pressure taking port III through measuring pipelines; two ends of the axial differential pressure acquisition device are respectively connected with the first pressure taking port and the fourth pressure taking port through measuring pipelines; the radial differential pressure acquisition device and the axial differential pressure acquisition device are respectively connected with the data processing device through signal cables; the liquid production inlet and the liquid production outlet are connected in a conveying pipeline at the wellhead of the oil production well. The utility model can generate more stable flow patterns and larger additional resistance, is more convenient for the value of differential pressure, improves the measurement accuracy and expands the application range of the on-line measuring system for the wellhead fluid production and water content of the oil well.
Description
Technical Field
The utility model belongs to measuring equipment for flow and water content of two-phase flow of an oil well, in particular to an on-line measuring system for water content of wellhead production fluid of the oil well.
Background
Metering of individual well fluid production from an oil well is a very important task in the development of oil fields, including the measurement of water, gas and fluid production. The current liquid amount is mainly calculated by adopting a work diagram method, the calibration coefficient of the standard production of the manual oil is adopted, and the water content is mainly obtained by manually sampling from a valve group in a wellhead or a metering station and then testing in a testing room by adopting a distillation method and a centrifugal method. Because of the inability to take large amounts of samples for analysis, the samples taken are poor in representativeness, low in full-process automation operation and high in labor intensity for workers. Because the error after the test is larger, the dynamic change of the oil well can not be accurately reflected, and the test data is lagged and the timeliness is poor. Therefore, the method can timely and accurately obtain the water content and the liquid production amount change of the oil well, and has very important significance for grasping the development dynamics of the oil reservoir and guiding the oil well to regulate and maintain normal production.
With the continuous development of oil-water two-phase research work, a plurality of new multiphase detection technologies are developed, and can be summarized into the following three types:
and (3) detecting by adopting a flowmeter: the main detection equipment comprises a positive displacement flowmeter such as a roots flowmeter and a scraper flowmeter, a single-phase flowmeter such as a turbine flowmeter, a constant-speed flowmeter such as an orifice plate and a venturi tube, a differential pressure flowmeter such as a mass flowmeter and a density sensor method, wherein the phase water content adopts a pressure differential densimeter, a capacitance water content meter or a ray water content meter and the like.
The method adopts a single-phase flow sensor and a single-phase flow sensor combination which are integrated by adopting two or more single-phase flow meters with signal outputs related to flow and phase water content, and the most application of the method is the integration of a differential pressure sensor and a differential pressure sensor.
(3) The dual-sensor correlation analysis is integrally combined with the phase water content sensor, and the method is most commonly used for measuring the speed by the correlation of a dual-ray attenuation sensor and analyzing the phase water content by utilizing an attenuation signal.
Different multiphase flow meters are suitable for different media conditions. The interface stability, pressure drop and the like of the three-phase oil, gas and water pipe flow change along with the different states of pipeline geometry, water content of each phase of fluid, fluid pressure, temperature and the like, and the three-phase oil, gas and water pipe flow shows different flow forms, which are called flow patterns. The different flow patterns have great influence on the accuracy of flow parameter measurement, and the gas phase change in the three-phase flow of oil, gas and water has the greatest influence on the flow patterns. Research on flow patterns of gas-liquid two-phase flow and multiphase flow by researchers such as D.Favrat, O.Zurcher. is mainly focused on research on flow patterns of fluid in horizontal pipelines and vertical pipelines. However, for the situations of large fluctuation range of flow rate and phase water content of the produced liquid of the oil well and complex flow, the application of the prior art still has great difficulty. At present, a plurality of metering methods based on the oil well liquid production flow and water content are available, but the measuring range is small, the application range is limited, the price is high, and the actual requirements of oil field production are difficult to meet.
Based on the urgency of online measurement research of oil well produced liquid, researchers in recent years propose a differential pressure type oil well produced liquid measurement method of rotational flow integer type, such as: the oil-water two-phase measuring device based on the rotational flow shaping disclosed in application number 202011200431.4 comprises an oil-water rotational flow shaper, the required straight pipe section is greatly shortened, the pressure difference is also greatly reduced, and the device has excellent adaptability to the conditions of rotational flow and vortex. For two-phase fluid, the cyclone device can rectify complex two-phase fluid into a state of uniformly dispersed flow or annular flow in a pipe which is symmetrical about an axis, so that the measurement is more convenient, and the method and the device are easier to realize standardization compared with other non-standard differential pressure flowmeters because the method is only a simple cyclone for influencing the measurement.
Said utility model can utilize cyclone device to make complex two-phase fluid be rectified into uniformly dispersed flow or annular flow in the tube symmetrical with respect to axis, and can be used for establishing flow pattern required for radial and axial pressure difference measurement.
For another example, application number 202011200340.0 discloses an on-line metering device and method for oil well production liquid based on rotational flow shaping, which comprises an oil-gas-water production liquid inlet part, a liquid-producing gas-phase separation part, a liquid-producing oil-water rotational flow shaping uniform mixing part, a differential pressure measurement and metering system and an oil-gas-water three-phase remixing outflow part, wherein after gas-liquid separation, radial differential pressure generated along the center of a pipeline and the wall of the pipeline is generated by using a rotational flow shaping device, and axial differential pressure formed before and after the rotational flow shaping device is related to flow and water content, so that double differential pressure is utilized to realize double-parameter measurement of water content and liquid phase flow of the oil well. In the field test process, because intermittent liquid production exists in the metering process of the liquid production of the thick oil well and the impurity carried in the liquid production of the high-viscosity crude oil has great influence on measurement, the additional pressure difference generated by single rotational flow in small flow is small, and the measurement error is large.
The on-line measuring device for the water content of the produced fluid at the wellhead of the oil well still needs to be improved.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide an oil well wellhead fluid water content online measurement system, and on the basis of earlier research, the structure of the system is improved, so that a more stable flow pattern and larger additional resistance can be generated, the differential pressure value can be more conveniently taken, the oil well wellhead fluid water content online measurement precision is improved, and the application range of the oil well wellhead fluid water content online measurement device is expanded.
The aim of the utility model is achieved by the following technical measures: the utility model provides an oil well wellhead liquid water content on-line measuring system, includes fluid integer device, radial differential pressure collection system, axial differential pressure collection system and data processing device, wherein: the fluid shaping device is provided with three sets, namely a fluid shaping device I, a fluid shaping device II and a fluid shaping device III, which are sequentially connected in a measuring pipeline between a liquid production inlet and a liquid production outlet; a pressure taking port II and a pressure taking port III are arranged in measuring pipelines at two sides of the fluid shaping device II; the measuring pipe lines at the two sides of the fluid shaping device I and the fluid shaping device III are provided with a pressure taking port I and a pressure taking port IV; the two ends of the radial differential pressure acquisition device are respectively connected with the pressure taking port II and the pressure taking port III through measuring pipelines; two ends of the axial differential pressure acquisition device are respectively connected with the first pressure taking port and the fourth pressure taking port through measuring pipelines; the radial differential pressure acquisition device and the axial differential pressure acquisition device are respectively connected with the data processing device through signal cables; the liquid production inlet and the liquid production outlet are connected in a conveying pipeline at the wellhead of the oil production well.
Preferably, the first fluid shaping device and the third fluid shaping device are hybrid fluid shaping devices.
Preferably, the second fluid shaping device is a rotational flow type fluid shaping device.
Preferably, the liquid production inlet and the liquid production outlet are respectively connected in parallel in the conveying pipelines at two sides of the wellhead collecting and conveying pipeline control valve.
Preferably, a sand setting device is also connected in the measuring pipeline between the liquid producing inlet and the first pressure taking port.
Preferably, a flow guiding frame is also connected in a measuring pipeline between the first pressure taking port and the sand setting device.
Preferably, the flow guiding frame comprises a pipe body and a central support, the central support is fixed in the pipe body, the central support is a cross-shaped frame, and two ends of the pipe body are taper pipes and are connected with the measuring pipeline through joints.
Preferably, an inlet control valve is connected in a measuring pipeline between the liquid production inlet and the sand setting device; and an outlet control valve is connected in a measuring pipeline between the liquid outlet and the pressure taking port IV.
Compared with the prior art, the utility model has the following advantages and characteristics: the three sets of fluid shaping devices are arranged in the utility model, so that the oil-water two-phase flow can be rectified into a stable and uniform flow pattern, larger additional resistance is generated, and the online measurement of the water content of the wellhead fluid of the oil well is realized through the radial differential pressure acquisition device, the axial differential pressure acquisition device and the data processing device.
In order to purify the wellhead produced liquid of the oil production well, the utility model also adopts a sand setting device, and meanwhile, the oil clusters in the produced liquid are primarily dispersed by utilizing the cross-shaped flow guide frame of the center support, so that the accuracy of online measurement of the wellhead produced liquid water of the oil well, which is measured by the system, is higher.
The utility model improves the structure based on the earlier stage research, fully considers the influence of intermittent production liquid, crude oil viscosity and impurities in the production liquid of the thickened oil well on measurement, and is provided with three sets of fluid shaping devices which can uniformly mix complex two-phase fluid and maintain stability, can generate more stable flow patterns and larger additional resistance, is more convenient for the value of differential pressure, improves the measurement precision and expands the application range of the water-containing online measurement system of the wellhead production liquid of the oil well. The utility model can be used for on-line measurement of wellhead production water content of the oil well by common oil well, and is also suitable for wellhead production water content measurement of the thick oil well.
In conclusion, the utility model has good use effect.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a structural flow chart of an on-line measuring device for water content in wellhead fluid of an oil well.
Fig. 2 is a radial cross-sectional view of the baffle-mount of fig. 1.
In the figure: a liquid inlet 1; taking a first pressure port 2; a first fluid shaping device 3; a second pressure taking port 4; a radial differential pressure acquisition device 5; a second fluid shaping device 6; an axial differential pressure acquisition device 7; a third pressure taking port 8; a fluid shaping device III 9; a pressure taking port IV 10; a data processing device 11; a sand setting device 12; a guide frame 13; a liquid outlet 14, an inlet control valve 15, an outlet control valve 16 and a wellhead gathering line control valve 17.
Description of the embodiments
The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present utility model. The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 and 2, an on-line measurement system for water content in wellhead production of oil well includes a fluid shaping device, a radial differential pressure acquisition device 5, an axial differential pressure acquisition device 7 and a data processing device 11, wherein: the fluid shaping device is provided with three sets, namely a fluid shaping device I3, a fluid shaping device II 6 and a fluid shaping device III 9, which are sequentially connected in a measuring pipeline between the liquid production inlet 1 and the liquid production outlet 14; a pressure taking port II 4 and a pressure taking port III 8 are arranged in measuring pipelines at two sides of the fluid shaping device II 6; the measuring pipe lines at two sides of the first fluid shaping device 3 and the third fluid shaping device 9 are provided with a first pressure taking port 2 and a fourth pressure taking port 10; two ends of the radial differential pressure acquisition device 5 are respectively connected with the pressure taking port II 4 and the pressure taking port III 8 through measuring pipelines; two ends of the axial differential pressure acquisition device 7 are respectively connected with the first pressure taking port 2 and the fourth pressure taking port 10 through measuring pipelines; the radial differential pressure acquisition device 5 and the axial differential pressure acquisition device 7 are respectively connected with the data processing device 11 through signal cables; the production fluid inlet 1 and the production fluid outlet 14 are connected in a transfer line at the wellhead of the production well.
In the utility model, three sets of fluid shaping devices are arranged, and the fluid shaping device I3, the fluid shaping device II 6 and the fluid shaping device III 9 can fully mix the production liquid to form a uniform flow pattern; the second fluid shaping device 6 can generate rotational flow to form additional resistance; the fluid shaping device III 9 can maintain the uniform stability of the fluid.
The utility model is connected in a delivery line at the wellhead of a production well by a production fluid inlet 1 and a production fluid outlet 14. The oil well production fluid enters and flows through the three sets of fluid shaping devices through the production fluid inlet 1 to form uniform flow patterns and is stable and not layered in the measuring pipeline, the radial differential pressure acquisition device 5 and the axial differential pressure acquisition device 7 respectively measure the radial differential pressure of the center of the measuring pipeline at the designated section after fluid shaping and the axial differential pressure of the two side wall surfaces of the measuring pipeline at the designated section before and after rotational flow shaping in the measuring pipeline between the production fluid inlet 1 and the production fluid outlet 14, and the data processing device 11 can realize the online operation and display of the water content of the oil well wellhead production fluid.
The utility model fully considers the influence of intermittent production liquid of a thickened oil well, the viscosity of crude oil and impurities in the production liquid on measurement, and three shaping devices are additionally arranged to uniformly mix complex two-phase fluid and maintain stability, thereby being more convenient for the value of differential pressure, improving the measurement precision and expanding the application range of the online measurement device for the water content of the production liquid at the wellhead of an oil well.
One preferred embodiment is: the first fluid shaping device 3 and the third fluid shaping device 9 are hybrid fluid shaping devices.
One preferred embodiment is: the second fluid shaping device 6 is a rotational flow type fluid shaping device. The swirl fluid shaping device can generate additional resistance, increase the axial and radial differential pressure of the oil well fluid in the measuring pipeline, and fully consider the influence of intermittent fluid production of a thickened oil well, crude oil viscosity and impurities in the fluid to the online measurement of the water content of the oil well fluid.
One preferred embodiment is: the liquid production inlet 1 and the liquid production outlet 14 are respectively connected in parallel in the conveying pipelines at the two sides of the wellhead collecting and conveying pipeline control valve 17. The system can be conveniently installed, connected and overhauled, and oil well production is not affected in the installation, connection and overhauling processes of the system.
One preferred embodiment is: a sand setting device 12 is also connected in the measuring pipeline between the liquid producing inlet 1 and the pressure taking port 2. The sand setting device 12 is connected in a measuring pipeline between the liquid production inlet 1 and the pressure taking port I2, and impurities carried by high-viscosity crude oil can be filtered through a wall-clamping structure in the sand setting device 12.
One preferred embodiment is: a diversion frame 13 is also connected in the measuring pipeline between the pressure taking port I2 and the sand setting device 12. The diversion frame 13 connected in the measuring pipeline after the sand setting device 12 can primarily disperse the oil mass in the production fluid.
One preferred embodiment is: the flow guiding frame 13 comprises a pipe body and a central support, the central support is fixed in the pipe body, the central support is a cross-shaped frame, and two ends of the pipe body are taper pipes and are connected with a measuring pipeline through joints.
One preferred embodiment is: an inlet control valve 15 is connected in a measuring pipeline between the liquid production inlet 1 and the sand setting device 12; an outlet control valve 16 is connected in the measuring line between the liquid outlet 14 and the pressure tap four 10. The system can control the oil well liquid to enter and flow out of the system, and is convenient for installation and maintenance of the system.
In the use process of the utility model, the oil well production fluid firstly enters the sand setting device 12 through the production fluid inlet 1, sand and impurities in the production fluid are separated, the production fluid is purified, and the fluid in the measuring pipeline can be prevented from being blocked. Then the oil clusters in the produced liquid are primarily dispersed by the diversion frame 13, and a foundation is laid for forming uniform mixed flow in a short distance. Then sequentially flowing through a first fluid shaping device 3 to fully mix the production fluid and form a uniform and stable flow pattern; the second fluid shaping device 6 generates rotational flow to form additional resistance, so that the monitoring is convenient, and the metering range is expanded; the flow through the fluid shaping device three 9 maintains the stability of the uniform fluid, creating a stable axial pressure differential.
The pressure taking port III 8 and the pressure taking port II 4 are arranged on two sides of the fluid shaping device II 6 and are connected with the radial differential pressure acquisition device 5 to acquire radial differential pressure; the first pressure taking port 2 and the fourth pressure taking port 10 are respectively arranged on two sides of the first fluid shaping device 3 and the third fluid shaping device 9, are connected with the axial differential pressure acquisition device 7, and acquire the axial differential pressure. The data collected by the radial differential pressure collecting device 5 and the axial differential pressure collecting device 7 are transmitted to the data processing device 11, and the online operation and display of the water content of the produced fluid at the wellhead of the oil well are completed.
The embodiments described above are only exemplary embodiments, but the present utility model is not limited to these embodiments, and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and concept of the present utility model should be included in the scope of the present utility model. Therefore, the scope of protection is not limited to the description above.
Claims (8)
1. The system is characterized in that the fluid shaping device is provided with three sets of measuring pipelines which are respectively a first fluid shaping device, a second fluid shaping device and a third fluid shaping device and are sequentially connected between a fluid inlet and a fluid outlet; a pressure taking port II and a pressure taking port III are arranged in measuring pipelines at two sides of the fluid shaping device II; the measuring pipe lines at the two sides of the fluid shaping device I and the fluid shaping device III are provided with a pressure taking port I and a pressure taking port IV; the two ends of the radial differential pressure acquisition device are respectively connected with the pressure taking port II and the pressure taking port III through measuring pipelines; two ends of the axial differential pressure acquisition device are respectively connected with the first pressure taking port and the fourth pressure taking port through measuring pipelines; the radial differential pressure acquisition device and the axial differential pressure acquisition device are respectively connected with the data processing device through signal cables; the liquid production inlet and the liquid production outlet are connected in a conveying pipeline at the wellhead of the oil production well.
2. The system for on-line measurement of wellhead fluid production water content of an oil well of claim 1, wherein the first fluid shaping device and the third fluid shaping device are hybrid fluid shaping devices.
3. An in-line measurement system for wellhead fluid production water as claimed in claim 2 wherein said second fluid shaping device is a cyclonic fluid shaping device.
4. An on-line measurement system for the production fluid water content of an oil well wellhead as claimed in claim 3, wherein the production fluid inlet and the production fluid outlet are respectively connected in parallel in the delivery pipelines at both sides of the wellhead gathering pipeline control valve.
5. An in-line measurement system for the production of fluids from an oil well wellhead as claimed in claim 4 wherein a sand setting device is also connected in the measurement line between the production fluid inlet and the first pressure take-off port.
6. An in-line measurement system for wellhead fluid production as claimed in claim 5 wherein a diverter is also connected in the measurement line between the first pressure take-off port and the sand setting device.
7. The system for online measurement of wellhead fluid production water content of an oil well as recited in claim 6, wherein the flow guide frame comprises a tube body and a central support, the central support is fixed in the tube body, the central support is a cross frame, and two ends of the tube body are taper pipes and are connected with the measurement pipeline through joints.
8. An in-line measurement system for the production of water from an wellhead of an oil well as claimed in claim 7 wherein an inlet control valve is connected in the measurement line between the production inlet and the sand setting device; and an outlet control valve is connected in a measuring pipeline between the liquid outlet and the pressure taking port IV.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321542958.4U CN220118104U (en) | 2023-06-16 | 2023-06-16 | Online measurement system for water content of wellhead production fluid of oil well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321542958.4U CN220118104U (en) | 2023-06-16 | 2023-06-16 | Online measurement system for water content of wellhead production fluid of oil well |
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