CN212748788U - Device for measuring water content of oil well on line - Google Patents
Device for measuring water content of oil well on line Download PDFInfo
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- CN212748788U CN212748788U CN202020615744.5U CN202020615744U CN212748788U CN 212748788 U CN212748788 U CN 212748788U CN 202020615744 U CN202020615744 U CN 202020615744U CN 212748788 U CN212748788 U CN 212748788U
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Abstract
The utility model provides a device of on-line measuring oil well moisture content through drawing forth one at oil transportation trunk line (1) and advancing oil pipe way (3) and go out oil pipe way (6), advances and sets up specific heat capacity moisture content measuring apparatu (9) between oil pipe way (3) and go out oil pipe way (6), adopts specific heat capacity method to measure the moisture content of the oil gas water fluid of following the oil well production, is responsible for oil transportation with oil gas water fluid conveying back again. When can be timely the detection moisture content in the oil gas rivers fluid, improve and detect precision and degree of accuracy, the measurable range of moisture content is also bigger. Moreover, the heat-conducting flow meter and the specific heat water content measuring instrument are arranged in parallel, the flow and the water content of the oil-gas-water fluid can be measured successively, pipeline connection arrangement at other positions of the oil transportation main pipeline is not needed, simplicity and practicability are achieved, occupied space is small, and time and space are saved. But also facilitates the statistics of data and the maintenance of instruments and pipelines.
Description
Technical Field
The utility model relates to a crude oil detection field especially relates to a device of on-line measuring oil well moisture content.
Background
The number of oil extraction wells in an oil field is tens of thousands, and the water content parameter of the oil and gas well is one of important parameters for observing and evaluating whether the oil well is normal or not. The existing measuring method of the water content of the oil well mainly comprises off-line measurement and on-line measurement, and the off-line measurement is taken as the main measurement.
The off-line measurement is that a small amount of oil well produced fluid is manually obtained at a wellhead and is put indoors to measure the water content of a sample through an instrument. Although the offline measurement method is simple to operate, the artificial error is large, the sample representativeness is poor, the sampling process is complicated, the labor intensity is high, sampling personnel need to overcome various difficulties in extreme weather (cold, strong wind, high temperature and the like), and the change of water content in oil, gas and water fluid extracted from an oil well is difficult to accurately and timely reflect, so that the requirement of automatic management of the oil field cannot be met, and the construction of a digital oil field is not facilitated.
The on-line measurement is an on-line real-time measurement by installing instrument equipment on the production fluid line. The method has the advantages that: automatic measurement avoids the manual wellhead sampling process; the disadvantages are as follows: the measurement precision is low, and is generally lower than 75%. The principle of online measurement of the water content of the oil well mainly comprises the following steps: densitometry, microwave, gamma ray, radio frequency, conductance, capacitance, and the like. The measurement methods currently in practical use include: gamma ray, radio frequency, and capacitance methods.
(1) The gamma ray method is based on the principle that gamma rays can attenuate in different degrees when passing through different types of media, and is used for measuring the water content of oil, gas and water fluid. The property of oil and water is different, the absorption capacity to gamma ray is also different, when the gamma ray passes through the oil and water, the water content of oil, gas and water fluid can be obtained according to the different absorption coefficients of the oil and water. The method does not directly contact with the fluid, and can realize continuous measurement. The disadvantage is that for 60MeV gamma ray, although the absorption coefficient of oil and water to the ray is still different, the absorption coefficient is only about 20%, which results in lower sensitivity and accuracy of the water content analyzer. Typical representatives of this type of meter are model CM-3, FDH-1 moisture content meters developed in the United states.
(2) The radio frequency method has the advantages that the dielectric constants of the oil-gas-water fluid and the water are different by a plurality of times, namely 2.3 and 80 respectively, and when the water content in the oil-gas-water fluid is changed, the mixed dielectric constant of the oil-gas-water fluid is also changed. The signals are converted and then the current signals are received by the receiver, and finally the volume fraction of water in oil and water is calculated according to the change amount of the current. The method has simple circuit, reliable work and convenient installation and maintenance, and can further expand the test range if being combined with the conductivity measuring circuit. The analyzers represented by the radio frequency method comprise CA-71-718 intelligent analyzers developed and produced in the United states and SH intelligent moisture analyzers developed in China, and due to the limitation of design conditions, the products are generally only suitable for oil wells with the water content of below 50%.
(3) The capacitance method is simple in principle of measuring the water content of oil-gas-water fluid by the capacitance method, the difference of dielectric constants of oil and water is large, when the oil-gas-water fluid with different water contents flows through two electrodes of a special capacitance probe, the mixed dielectric constants of the oil-gas-water fluid and the water are different, different capacitance values can be generated, and the capacitance values are converted into electric signals through professional electronic circuits and original components, so that the water content can be monitored in real time. But is greatly influenced by the mineralization degree and the temperature, and the measurement precision is low.
SUMMERY OF THE UTILITY MODEL
Based on the problem that exists among the prior art, the utility model provides a device of on-line measuring oil well moisture content when aiming at accurate timely detection from the oil well water content in the oil gas fluid of extraction, improves and detects precision and degree of accuracy to be applicable to the oil well of 0% -100% within range moisture content. The utility model discloses a realize through following technical scheme.
An apparatus for on-line measuring water content of an oil well, comprising:
one end of the oil inlet pipeline is connected with an oil transportation main pipeline and is used for introducing oil, gas and water fluid which is transmitted by the oil transportation main pipeline and is to be measured and is produced by a single well;
the first inlet valve is arranged on the oil inlet pipeline and is close to the front end of the specific heat water content measuring instrument;
the front end of the specific heat and water content measuring instrument is connected with the other end of the oil inlet pipeline;
one end of the oil outlet pipeline is connected with the rear end of the specific heat water content measuring instrument, and the other end of the oil outlet pipeline is connected with the oil transportation main pipeline;
the first outlet valve is arranged on the oil outlet pipeline and is close to the rear end of the specific heat water content measuring instrument;
and the control device is electrically connected with the first inlet valve, the specific heat capacity water content measuring instrument and the first outlet valve respectively and is used for controlling the opening and closing of the first inlet valve, the specific heat capacity water content measuring instrument and the first outlet valve respectively.
Further, the method also comprises the following steps: and the second inlet valve is arranged at one end of the oil inlet pipeline connected with the main oil transportation pipeline.
Further, the method also comprises the following steps: and the second outlet valve is arranged at one end of the oil outlet pipeline connected with the oil transportation main pipeline.
Further, the method also comprises the following steps: and the oil-water mixer is arranged on the oil inlet pipeline and is positioned between the first inlet valve and the second inlet valve.
Further, the method also comprises the following steps:
the oil inlet end of the thermal conductivity flowmeter is connected with the tail end of the first inner bypass pipeline, and the oil outlet end of the thermal conductivity flowmeter is connected with the starting end of the second inner bypass pipeline;
the starting end of the first inner bypass pipeline is connected with the oil inlet pipeline and is positioned between the oil-water mixer and the first inlet valve;
the tail end of the second inner bypass pipeline is connected with the oil outlet pipeline and is positioned between the first outlet valve and the second outlet valve.
Further, the method also comprises the following steps: the control device is also connected with the thermal conductivity flowmeter.
Further, the method also comprises the following steps: the first inlet valve and the first outlet valve are both solenoid valves.
Further, the method also comprises the following steps: the control device is a programmable logic control device.
Further, the method also comprises the following steps: the main pipeline valve is arranged on the main oil pipeline and is positioned between the joint of the main oil pipeline and the oil inlet pipeline and between the main oil pipeline (1) and the joint of the oil outlet pipeline.
The utility model has the beneficial technical effects that: through the utility model provides a device of on-line measuring oil well moisture content when accurate timely detection oil gas water fluid moisture content, improves and detects precision and degree of accuracy, has enlarged the measurable quantity scope of moisture content. Moreover, the heat-conducting flow meter and the specific heat water content measuring instrument are arranged in parallel, the flow and the water content of the oil-gas-water fluid can be measured successively, pipeline connection arrangement at other positions of the oil transportation main pipeline is not needed, simplicity and practicability are achieved, occupied space is small, and time and space are saved. But also facilitates the statistics of data and the maintenance of instruments and pipelines.
Drawings
Fig. 1 is a schematic view of the structure of the device of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The utility model provides a device of on-line measuring oil well moisture content, include:
one end of the oil inlet pipeline (3) is connected with the main oil transportation pipeline (1) and is used for introducing oil, gas and water fluid which is transmitted by the main oil transportation pipeline (1) and is to be measured and produced by a single well; the first inlet valve (7) is arranged on the oil inlet pipeline (3) and is close to the front end of the specific heat water content measuring instrument (9); the front end of the specific heat and water content measuring instrument (9) is connected with the other end of the oil inlet pipeline (3); one end of the oil outlet pipeline (6) is connected with the rear end of the specific heat water content measuring instrument (9), and the other end of the oil outlet pipeline (6) is connected with the oil transportation main pipeline (1); the first outlet valve (11) is arranged on the oil outlet pipeline (6) and is close to the rear end of the specific heat water content measuring instrument (9); and the control device (10) is electrically connected with the first inlet valve (7), the specific heat capacity water content measuring instrument (9) and the first outlet valve (11) respectively and is used for controlling the opening and closing of the first inlet valve (7), the specific heat capacity water content measuring instrument (9) and the first outlet valve (11) respectively.
The oil inlet pipeline (3) is used for introducing oil-gas-water fluid which is transmitted by the main oil transportation pipeline (1) and is to be measured and produced by a single well.
The first inlet valve (7) is used for measuring the water content when the oil, gas and water fluid is introduced into the specific heat water content measuring instrument (9).
The first inlet valve (7) and the first outlet valve (11) are arranged at two ends of the specific heat water content measuring instrument (9), and when the first inlet valve (7) is controlled to be opened and the first outlet valve (11) is closed, oil-gas-water fluid enters the specific heat water content measuring instrument (9). And then, controlling the first inlet valve (7) to be closed, simultaneously closing the first inlet valve (7) and the first outlet valve (11), maintaining the oil-gas-water fluid in the specific heat capacity-water content measuring instrument (9), controlling the specific heat capacity-water content measuring instrument (9) to be opened, and then starting to measure the water content of the oil-gas-water fluid. The utility model discloses in, in specific heat capacity moisture content measuring apparatu (9), because the specific heat capacity difference of oil and water is big, different moisture content intensification range is different to this confirms the moisture content of measurand fluid. The specific heat and water content measuring instrument (9) can adopt the existing testing instrument and calculation method, and need not be described in more detail.
The oil outlet pipeline (6) is used for conveying oil, gas and water fluid back to the oil main pipeline (1).
And the first outlet valve (11) is used for leading the oil-gas-water fluid out of the specific heat capacity and water content measuring instrument (9) to the oil outlet pipeline (6) after measurement.
Controlling means (10), respectively with first import valve (7), specific heat moisture content measuring apparatu (9) and first outlet valve (11) electric connection for: before measurement, the first inlet valve (7) is opened, the specific heat capacity water content measuring instrument (9) and the first outlet valve (11) are closed, the first inlet valve (7) and the first outlet valve (11) are closed during measurement, the specific heat capacity water content measuring instrument (9) is opened, the specific heat capacity water content measuring instrument (9) is closed after measurement, and the first inlet valve (7) and the first outlet valve (11) are opened simultaneously. After the measurement is finished, the control device (10) controls the first inlet valve (7) and the first outlet valve (11) to be opened, the produced oil-gas-water fluid is sent back to the oil transmission main pipeline (1), and the opening of the first inlet valve (7) mainly ensures that the residual oil-gas-water fluid in the oil inlet pipeline (3) is sent back to the oil transmission main pipeline (1) together.
Further still include: and the second inlet valve (4) is arranged at one end of the oil inlet pipeline (3) connected with the main oil transportation pipeline (1). The second inlet valve (4) is used for controlling the opening and closing of the oil inlet pipeline (3).
Further, the method also comprises the following steps: and the second outlet valve (13) is arranged at one end of the oil outlet pipeline (6) connected with the main oil delivery pipeline (1). The second outlet valve (13) is used for controlling the opening and closing of the oil outlet pipeline (6).
Further, the method also comprises the following steps: and the oil-water mixer (5) is arranged on the oil inlet pipeline (3) and is positioned between the first inlet valve (7) and the second inlet valve (4). The oil-water mixer (5) is used for uniformly mixing oil-gas-water fluid. After the oil-gas-water fluid enters the oil inlet pipe (3), the oil-gas-water fluid is mixed in the oil-water mixer (5), so that the uniformity of subsequent sampling measurement is ensured.
Further, the method also comprises the following steps:
the heat conduction flow meter (8) is used for measuring the flow of the oil gas water fluid, the oil inlet end of the heat conduction flow meter (8) is connected with the tail end of the first inner bypass pipeline (14), and the oil outlet end of the heat conduction flow meter (8) is connected with the starting end of the second inner bypass pipeline (12);
the starting end of the first inner bypass pipeline (14) is connected with the oil inlet pipeline (3) and is positioned between the oil-water mixer (5) and the first inlet valve (7);
the end of the second inner bypass pipeline (12) is connected with the oil outlet pipeline (6) and is positioned between the first outlet valve (11) and the second outlet valve (13).
Further, the control device (10) is also connected with the thermal conductivity flowmeter (8) and is used for controlling and starting the thermal conductivity flowmeter (8) to work before the water content test.
The joint of the first inner bypass pipeline (14) and the oil inlet pipeline (3) can also be arranged in front of the oil-water mixer (5), namely between the second inlet valve (4) and the oil-water mixer (5), namely, when the thermal conductivity flowmeter (8) works, oil-water mixing is not needed. The gathering and transportation pipe network of the fluid produced by the oil wells of the former oil field generally adopts the oil gas water fluid of a plurality of oil wells to be transported to an oil transportation main pipeline (1) through pipelines, the oil gas water fluid flow of each well is sequentially measured in turn in the oil transportation main pipeline (1), and then the oil gas water fluid is transported to a downstream pipeline by the oil transportation main pipeline (1). The utility model discloses locate parallel introduction specific heat capacity moisture content measuring apparatu (9) at flow measurement equipment instant heating water conservancy diversion meter (8), introduce the device with the oil gas aqueous fluid of the volume of awaiting measuring individual well and carry out the moisture content and measure, then send oil transportation person in charge (1) back with oil gas aqueous fluid. The heat-conducting flow meter (8) and the specific heat water content measuring instrument (9) are arranged in parallel, the flow of the oil-gas-water fluid is measured firstly, then the water content of the oil-gas-water fluid is measured, and the flow is measured by the heat-conducting flow meter (8) or the specific heat water content measuring instrument (9) is led out to be arranged at the other part of the oil transportation main pipeline (1) to measure the water content, so that the time and the space are saved. But also facilitates the statistics of data and the maintenance of instruments and pipelines.
Further, the first inlet valve (7) and the first outlet valve (11) are both solenoid valves.
Further, the control device (10) is a programmable logic control device.
Furthermore, be equipped with trunk line valve (2) on oil transportation trunk line (1), trunk line valve (2) are located oil transportation trunk line (1) with advance the junction of oil pipe way (3) and oil transportation trunk line (1) with between the junction of oil pipe way (6).
And the main pipeline valve (2) is used for controlling the connection and disconnection of the main oil pipeline (1). The main oil delivery pipe (1) is a main pipe for transmitting produced oil gas water fluid, and the oil inlet pipe (3) is a bypass pipe and is connected to the side surface of the main oil delivery pipe (1). When measuring, main pipeline valve (2) are closed, oil gas water fluid flows into oil pipe (3), and when not measuring, main pipeline valve (2) open oil gas water fluid still transmits on oil transportation main pipe (1).
Further, the second inlet valve (4) and the second outlet valve (13) are electromagnetic valves.
The utility model discloses a concrete measurement process as follows:
firstly, closing a main pipeline valve (2), and introducing oil-gas-water fluid produced by a single well to be measured into an oil inlet pipeline (3) from a main oil transportation pipeline (1);
secondly, the control device (10) controls the first inlet valve (7) to be opened, controls the first outlet valve (11) to be kept closed, and introduces the oil-gas-water fluid into the specific heat water content measuring instrument (9);
thirdly, the control device (10) controls the first inlet valve (7) to be closed, controls the first outlet valve (11) to be closed, controls the specific heat capacity and water content measuring instrument (9) to be opened, measures the specific heat capacity of the oil-gas-water fluid through the specific heat capacity and water content measuring instrument (9), and calculates the water content of the oil-gas-water fluid according to the specific heat capacity;
and finally, the control device (10) controls to close the specific heat and water content measuring instrument (9), controls to open the first inlet valve (7) and the first outlet valve (11), and conveys the oil, gas and water fluid back to the oil main pipeline (1).
In addition, before the oil-gas-water fluid enters the specific heat water ratio measuring instrument (9), the oil-gas-water fluid is mixed by adopting an oil-water mixer (5).
In addition, the control device (10) controls the oil-gas-water fluid to be introduced into the thermal conductivity flowmeter (8) before the first inlet valve (7) is opened, and the control device (10) controls the thermal conductivity flowmeter (8) to be opened to measure the flow of the oil-gas-water fluid.
As an embodiment of the present invention, the junction of the first inner bypass pipe (14) and the oil inlet pipe (3) can also be disposed before the oil-water mixer (5), i.e. between the second inlet valve (4) and the oil-water mixer (5), i.e. when the thermal conductivity flowmeter (8) is in operation, it is not necessary to mix oil and water. Of course, the joint of the first inner bypass pipeline (14) and the oil inlet pipeline (3) can also be arranged behind the oil-water mixer (5), namely between the first inlet valve (7) and the oil-water mixer (5), namely, the oil and water are mixed and then enter the thermal conductivity flowmeter (8) for flow measurement.
Through the utility model provides a device of on-line measuring oil well moisture content when accurate timely detection oil gas water fluid moisture content, improves and detects precision and degree of accuracy, has enlarged the measurable quantity scope of moisture content. Moreover, the flow of the oil-gas-water fluid can be detected, and a flow metering device is not required to be additionally arranged.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (9)
1. The utility model provides a device of on-line measuring oil well moisture content which characterized in that includes:
one end of the oil inlet pipeline (3) is connected with the main oil transportation pipeline (1) and is used for introducing oil, gas and water fluid which is transmitted by the main oil transportation pipeline (1) and is to be measured and produced by a single well;
the first inlet valve (7) is arranged on the oil inlet pipeline (3) and is close to the front end of the specific heat water content measuring instrument (9);
the front end of the specific heat and water content measuring instrument (9) is connected with the other end of the oil inlet pipeline (3);
one end of the oil outlet pipeline (6) is connected with the rear end of the specific heat water content measuring instrument (9), and the other end of the oil outlet pipeline (6) is connected with the oil transportation main pipeline (1);
the first outlet valve (11) is arranged on the oil outlet pipeline (6) and is close to the rear end of the specific heat water content measuring instrument (9);
and the control device (10) is electrically connected with the first inlet valve (7), the specific heat capacity water content measuring instrument (9) and the first outlet valve (11) respectively and is used for controlling the opening and closing of the first inlet valve (7), the specific heat capacity water content measuring instrument (9) and the first outlet valve (11) respectively.
2. The apparatus for on-line measuring water cut of an oil well according to claim 1, further comprising:
and the second inlet valve (4) is arranged at one end of the oil inlet pipeline (3) connected with the main oil transportation pipeline (1).
3. The apparatus for on-line measuring water cut of an oil well according to claim 2, further comprising:
and the second outlet valve (13) is arranged at one end of the oil outlet pipeline (6) connected with the main oil delivery pipeline (1).
4. The apparatus for on-line measuring water cut of an oil well according to claim 3, further comprising:
and the oil-water mixer (5) is arranged on the oil inlet pipeline (3) and is positioned between the first inlet valve (7) and the second inlet valve (4).
5. The apparatus for on-line measuring water cut of an oil well according to claim 4, further comprising:
the heat conduction flow meter (8) is used for measuring the flow of the oil gas water fluid, the oil inlet end of the heat conduction flow meter (8) is connected with the tail end of the first inner bypass pipeline (14), and the oil outlet end of the heat conduction flow meter (8) is connected with the starting end of the second inner bypass pipeline (12);
the starting end of the first inner bypass pipeline (14) is connected with the oil inlet pipeline (3) and is positioned between the oil-water mixer (5) and the first inlet valve (7);
the end of the second inner bypass pipeline (12) is connected with the oil outlet pipeline (6) and is positioned between the first outlet valve (11) and the second outlet valve (13).
6. An apparatus for on-line measurement of water cut in oil wells according to claim 5, characterized in that the control device (10) is further connected to the thermal conductivity flow meter (8).
7. An apparatus for on-line measuring of water cut of an oil well according to claim 1, characterized in that the first inlet valve (7) and the first outlet valve (11) are solenoid valves.
8. An apparatus for on-line measurement of water cut in an oil well according to claim 1, characterized in that the control device (10) is a programmable logic control device.
9. The device for on-line measuring the water content of an oil well as claimed in claim 1,
be equipped with trunk line valve (2) on oil transportation trunk line (1), trunk line valve (2) are located oil transportation trunk line (1) with advance the junction of oil pipe way (3) and oil transportation trunk line (1) with between the junction of oil outlet pipe way (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615744.5U CN212748788U (en) | 2020-04-22 | 2020-04-22 | Device for measuring water content of oil well on line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020615744.5U CN212748788U (en) | 2020-04-22 | 2020-04-22 | Device for measuring water content of oil well on line |
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| CN212748788U true CN212748788U (en) | 2021-03-19 |
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| CN202020615744.5U Active CN212748788U (en) | 2020-04-22 | 2020-04-22 | Device for measuring water content of oil well on line |
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