CN115718121A - Oil well crude oil moisture content on-line measuring device - Google Patents
Oil well crude oil moisture content on-line measuring device Download PDFInfo
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- CN115718121A CN115718121A CN202211691398.9A CN202211691398A CN115718121A CN 115718121 A CN115718121 A CN 115718121A CN 202211691398 A CN202211691398 A CN 202211691398A CN 115718121 A CN115718121 A CN 115718121A
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Abstract
The invention discloses an oil well crude oil moisture content online measuring device in the field of oilfield ground production monitoring, which comprises an oil inlet pipe, a heating pipe and an oil outlet pipe, wherein one end of the heating pipe extends into the oil inlet pipe and is connected with the outer wall of the oil inlet pipe, the other end of the heating pipe extends into the oil outlet pipe and is connected with the outer wall of the oil outlet pipe, a front end temperature sensor is arranged at one end of the oil inlet pipe close to the heating pipe, a rear end temperature sensor is arranged at one end of the oil outlet pipe close to the heating pipe, and a heater is sleeved outside the heating pipe. The invention can solve the problems of low precision and poor stability when the water content of the crude oil is measured on line.
Description
Technical Field
The invention belongs to the technical field of oilfield ground production monitoring, and particularly relates to an oil well crude oil water content online measuring device.
Background
The density, viscosity and water content of the crude oil are important parameters for representing the quality of oil products and calculating the yield, and are necessary measurement items of each oil field geological laboratory. Therefore, it is important for the petroleum industry to accurately and quickly determine the above parameters. Along with the exploitation of oil fields for many years, the water content of crude oil is increased by high-pressure water injection of the oil wells, and the water content of the crude oil directly influences the exploitation, dehydration, gathering, transportation, metering, sale, smelting and the like of the crude oil.
The crude oil produced by the oil well is a mixed fluid consisting of oil, gas and water, the proportion of each phase is different for different oil fields, different blocks and different oil wells, and the proportion of each phase can be continuously changed along with the change of the underground condition and the production process. Therefore, the accurate measurement of the water content of the mixed liquid produced by the oil well is always a difficult problem of oil field measurement work.
In recent years, new methods for online measurement of water content of crude oil have appeared at home and abroad, and the methods for online measurement of water content mainly comprise a ray method, a capacitance method, a short wave method, a microwave method, a density method and the like. The disadvantages are that: for low-yield oil fields, the single-well yield is low, the yield fluctuation is large, the gas quantity is unstable, the sand production is more, the wax precipitation is serious and the like, and the accuracy and the stability of the capacitance method, the short-wave method, the microwave method and the density method are difficult to satisfy when the water content is measured on line, so that the method cannot be used for a long time. Especially, the gas is not separated or the gas-liquid separation is not thorough, and the liquid phase contains a small amount of gas, so that the measurement error of the water content is increased, and the large-area popularization and use in oil field production are not facilitated.
Disclosure of Invention
Based on the problems in the prior art, the invention provides an oil well crude oil water content online measuring device which can solve the problems of low precision and poor stability during online measurement of crude oil water content.
In order to realize the purpose, the invention adopts the following technical scheme: the utility model provides an oil well crude oil moisture content on-line measuring device, its characterized in that, including advancing oil pipe, heating pipe, play oil pipe, the one end of heating pipe stretches into in the oil pipe and with advance oil pipe outer wall connection, the other end of heating pipe stretch into in the oil pipe and with go out oil pipe outer wall connection, the one end that advances oil pipe and be close to the heating pipe is provided with front end temperature sensor, the one end that goes out oil pipe and be close to the heating pipe is provided with rear end temperature sensor, the heating pipe overcoat is equipped with the heater.
When the device is used, the heater clinging to the outer wall of the heating pipe is used for heating oil well crude oil flowing in the pipe, the heat value is obtained by measuring the input voltage and current of the heater, the quality of the oil well crude oil in the time is obtained by using crude oil yield data measured by the existing flow measuring device, the temperature rise of the oil well crude oil is measured by using the front end temperature sensor and the rear end temperature sensor, and the temperature rise value is obtained by iteration for a period of time. Under the same heating quantity and mass conditions, the specific heat capacity of water is larger than that of petroleum, so that the proportion of water in crude oil of an oil well is larger, and the temperature rise value is lower. The water content of the crude oil in the oil well is calculated according to the heating quantity, the quality of the crude oil in the oil well flowing through and the temperature rise value in the same time, and compared with the prior art, the method has the advantages that: the device measures the water content of the crude oil by adopting a specific heat capacity method, the influence of gas on the water content is not required to be considered, and the detection precision and accuracy are improved; the device has simple structure and small occupied space, saves time and space, and is convenient for maintaining instruments and pipelines.
As a further improvement of the invention, the end parts of the oil inlet pipe and the oil outlet pipe close to the oil filling pipe are respectively provided with a connecting part extending towards the outer wall direction of the oil filling pipe, and the included angle between the connecting parts and the horizontal plane is alpha.
As a further improvement of the invention, flanges are arranged at the ends of the oil inlet pipe and the oil outlet pipe far away from the heating pipe. The pipeline is connected through the flange, the sealing performance of the pipeline is kept, and the disassembly is convenient.
As a further improvement of the invention, square baffles are sleeved outside the oil inlet pipe and the oil outlet pipe, four angle irons are symmetrically distributed between the two square baffles, and a rectangular shell is arranged between every two adjacent angle irons.
As a further improvement of the invention, the gaps among the oil inlet pipe, the heating pipe, the oil outlet pipe and the shell are filled with foaming materials. The foaming material can ensure the constant temperature in the pipeline.
As a further improvement of the invention, one end of the oil inlet pipe close to the heating pipe is also provided with a pressure sensor. The oil well back pressure phenomenon can be monitored in real time through the pressure sensor.
As a further improvement of the invention, the outer walls of the oil inlet pipe, the heating pipe, the oil outlet pipe, the flange, the baffle and the angle iron are coated with antirust paint.
As a further improvement of the invention, the nominal diameters of the oil inlet pipe and the oil outlet pipe are both 50mm, the nominal diameter of the heating pipe is 25mm, the length of the heating pipe is 250mm, the distance between the oil inlet pipe and the oil outlet pipe is 220mm, the distance between the two square baffles is 560mm, and the distance between the two flanges is 720mm.
As a further improvement of the invention, the invention also comprises a data acquisition unit, a data converter, a data transmission module and a programmable controller, wherein the data acquisition unit is used for acquiring signals of the front-end temperature sensor, the rear-end temperature sensor and the pressure sensor, the data converter is used for converting three paths of analog signals into digital signals, and the programmable controller comprises a circuit with functions of realizing data processing, calculation and storage.
As a further improvement of the invention, the electric heating device also comprises a heater controller which is used for controlling the on-off of the circuit of the heater.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a cross-sectional view at B-B in fig. 2.
FIG. 5 is a block diagram of a preferred embodiment of the present invention.
Wherein, 1 advance oil pipe, 101 connecting portion, 2 heating pipes, 3 play oil pipe, 4 flanges, 5 square baffles, 6 angle bar, 7 rectangle shells, 8 expanded materials, 9 heaters.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1-4, the present invention provides an online measuring device for water content of crude oil in an oil well, which includes an oil inlet pipe 1 with a nominal diameter of 50mm, a heating pipe 2 with a nominal diameter of 25mm, and an oil outlet pipe 3 with a nominal diameter of 50mm, wherein one end of the heating pipe 2 extends into the oil inlet pipe 1 and is connected with the outer wall of the oil inlet pipe 1, the other end of the heating pipe 2 extends into the oil outlet pipe 3 and is connected with the outer wall of the oil outlet pipe 3, the ends of the oil inlet pipe 1 and the oil outlet pipe 3 close to the oil inlet pipe are both provided with a connecting portion 101 extending towards the outer wall of the oil inlet pipe, the included angle between the connecting portion 101 and the horizontal plane is α, α is preferably 18 °, the length of the heating pipe 2 is 250mm, and the distance between the oil inlet pipe 1 and the oil outlet pipe 3 is 220mm; a front-end temperature sensor and a pressure sensor are arranged at one end of the oil inlet pipe 1 close to the heating pipe 2, the back pressure phenomenon of the oil well can be monitored in real time through the pressure sensor, a rear-end temperature sensor is arranged at one end of the oil outlet pipe 3 close to the heating pipe 2, and a constant-power heater 9 is sleeved outside the heating pipe 2; flanges 4 are arranged at the end parts of the oil inlet pipe 1 and the oil outlet pipe 3 far away from the heating pipe 2, and the distance between the two flanges 4 is 720mm; square baffles 5 are sleeved outside the oil inlet pipe 1 and the oil outlet pipe 3, the distance between the two square baffles 5 is 560mm, four angle irons 6 are symmetrically distributed between the two square baffles 5, and a rectangular shell 7 is arranged between every two adjacent angle irons 6; the outer walls of the oil inlet pipe 1, the heating pipe 2, the oil outlet pipe 3, the flange 4, the square baffle 5 and the angle iron 6 are coated with antirust paint; the gaps between the oil inlet pipe 1, the heating pipe 2, the oil outlet pipe 3 and the shell are filled with foaming materials 8 for preserving the temperature inside the pipeline.
The dimensions mentioned in the above embodiments can all be upgraded and changed according to different oil well pipelines, thereby achieving the maximum value of the measuring device.
As shown in fig. 5, the apparatus of the present invention includes a data collector, a data converter, a data transmission module, a programmable controller, an AC220V power supply, a 48V regulated power supply, and a 24V regulated power supply, where the data collector is used to collect signals of a front end temperature sensor, a rear end temperature sensor, and a pressure sensor, the data converter converts three analog signals into digital signals, the programmable controller includes a circuit having functions of implementing data processing, calculation, and storage, the 48V regulated power supply provides a constant voltage for the heater 9 to ensure that the power of the heater 9 is constant, and the 24V regulated power supply provides power for other circuits; preferably, the heater 9 and the heater 9 controller electric connection, the live wire inlet wire end of AC220V power supply has the fuse of circuit protection in series, and data converter adopts RS485 bus and Moubus-RTU agreement, reads by programmable controller, and output information that known flow system of rear end sent can be received to the data transmission module and is provided for programmable controller, and programmable controller uploads backstage data center through the data transmission module with the moisture content data that calculate at last.
The specific heat capacity of water is known to be 4.18 × 103J per kg. ° c, and the specific heat capacity of petroleum is 2.05 × 103J per kg. ° c, and the same heat value of water and petroleum are heated, and the temperature rise values of the water and the petroleum are different, and are lower as the specific heat capacities are higher, and are higher as the specific heat capacities are higher. When the device is used, the device is arranged on a pipeline through flanges 4 at two ends, a constant power heater 9 tightly attached to the outer wall of a heating pipe 2 is opened through a heater 9 controller, oil well crude oil flowing in the pipeline is heated, the heat value generated by the constant power heater 9 in the same time is constant, the heat value is obtained by measuring the input voltage and the current of the heater 9, and the quality of the oil well crude oil in the time is obtained by utilizing crude oil yield data measured by the existing flow measuring device in the prior art; the programmable controller combines the temperature rise values measured by the front end temperature sensor and the rear end temperature sensor to calculate the water content of the crude oil flowing out of the wellhead, and finally the water content data of the crude oil is uploaded through the data transmission module, and the invention has the advantages that: the moisture content can be measured, collected and analyzed by remote control equipment, manual operation equipment is not needed, the labor intensity of personnel is reduced, and the economic benefit is improved; the device has simple structure, small occupied space, time and space saving, easy disassembly and convenient maintenance of instruments and pipelines by personnel; this device has adopted specific heat method to measure crude oil moisture content, need not to consider the influence of gas to the moisture content, has improved detection precision and degree of accuracy.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides an oil well crude oil moisture content on-line measuring device, its characterized in that, including advancing oil pipe, heating pipe, play oil pipe, the one end of heating pipe stretches into in the oil pipe and with advance oil pipe outer wall connection, the other end of heating pipe stretch into in the oil pipe and with go out oil pipe outer wall connection, the one end that advances oil pipe and be close to the heating pipe is provided with front end temperature sensor, the one end that goes out oil pipe and be close to the heating pipe is provided with rear end temperature sensor, the heating pipe overcoat is equipped with the heater.
2. The on-line measuring device for the water content of crude oil in the oil well as claimed in claim 1, wherein the oil inlet pipe and the oil outlet pipe are provided with connecting parts extending towards the outer wall direction of the oil filling pipe at the end parts close to the oil filling pipe, and the included angle between the connecting parts and the horizontal plane is alpha.
3. The on-line measuring device for the water content of crude oil in the oil well as claimed in claim 2, wherein flanges are arranged at the ends of the oil inlet pipe and the oil outlet pipe which are far away from the heating pipe.
4. The on-line measuring device for the water content of the crude oil in the oil well is characterized in that square baffles are sleeved outside the oil inlet pipe and the oil outlet pipe, four angle irons are symmetrically distributed between the two square baffles, and a rectangular shell is arranged between the two adjacent angle irons.
5. The on-line measuring device for the water content of crude oil in the oil well is characterized in that gaps among the oil inlet pipe, the heating pipe, the oil outlet pipe and the shell are filled with foaming materials.
6. The on-line measuring device for the water content of the crude oil in the oil well as claimed in claim 5, wherein a pressure sensor is further arranged at one end of the oil inlet pipe close to the heating pipe.
7. The on-line measuring device for the water content of crude oil in the oil well according to any one of claims 1 to 6, wherein the outer walls of the oil inlet pipe, the heating pipe, the oil outlet pipe, the flange, the baffle plate and the angle iron are coated with antirust paint.
8. The device of claim 7, wherein the nominal diameter of each of the oil inlet pipe and the oil outlet pipe is 50mm, the nominal diameter of the heating pipe is 25mm, the length of the heating pipe is 250mm, the distance between the oil inlet pipe and the oil outlet pipe is 220mm, the distance between the two square baffles is 560mm, and the distance between the two flanges is 720mm.
9. The on-line measuring device for the water content of crude oil in the oil well according to claim 1, further comprising a data collector, a data converter, a data transmission module and a programmable controller, wherein the data collector is used for collecting signals of the front-end temperature sensor, the rear-end temperature sensor and the pressure sensor, the data converter is used for converting three paths of analog signals into digital signals, and the programmable controller comprises a circuit with functions of realizing data processing, calculation and storage.
10. The on-line measuring device for the water content of crude oil in the oil well as claimed in claim 9, further comprising a heater controller, wherein the heater controller is used for controlling the on-off of a circuit of the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211691398.9A CN115718121A (en) | 2022-12-28 | 2022-12-28 | Oil well crude oil moisture content on-line measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211691398.9A CN115718121A (en) | 2022-12-28 | 2022-12-28 | Oil well crude oil moisture content on-line measuring device |
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| CN115718121A true CN115718121A (en) | 2023-02-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699111A (en) * | 2023-08-07 | 2023-09-05 | 陕西中易泰能源科技有限公司 | Crude oil water content measurement system, device and method |
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- 2022-12-28 CN CN202211691398.9A patent/CN115718121A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699111A (en) * | 2023-08-07 | 2023-09-05 | 陕西中易泰能源科技有限公司 | Crude oil water content measurement system, device and method |
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