Water content analyzer with high gas-liquid ratio

Abstract

The invention relates to the technical field of oil exploitation, in particular to a high-gas-liquid-ratio water content analyzer which comprises a measuring pipe, the measuring pipe is arranged in the horizontal direction, and the measuring pipe is provided with an oil inlet end and an oil outlet end; the emitter is arranged in the measuring tube and is used for emitting radio frequency microwaves; and the detector is arranged below the emitter and is used for receiving the radio frequency microwaves emitted by the emitter. The water content analysis device has the effect of performing water content analysis under the condition of high gas-liquid ratio.

Description

Technical Field

[0001] The present application relates to the technical field of oil extraction, and in particular to a high gas-liquid ratio water content analyzer. Background Art

[0002] In the field of oil exploration and production, accurate measurement of water content is of great significance for optimizing oil well working efficiency and improving economic benefits. The relevant technical means mainly include electromagnetic induction technology, sensor contact measurement technology and optical analysis technology. Electromagnetic induction technology infers water content by measuring the conductivity of the medium, but this method is easily affected by bubbles, resulting in measurement errors; sensor contact measurement technology obtains fluid information through contact sensors, but scaling and waxing will cause sensor performance to deteriorate; optical analysis technology uses different absorption characteristics of light by different media to measure water content, but under high gas-liquid ratio conditions, bubbles will also interfere with the measurement results. When the above technical means are applied to high gas-liquid ratio water content analysis, there is a problem that the measurement errors caused by scaling and waxing cannot be effectively eliminated. Summary of the invention

[0003] In order to perform water analysis under high gas-liquid ratio conditions, the present application provides a high gas-liquid ratio water analyzer.

[0004] A high gas-liquid ratio water analyzer provided in the present application adopts the following technical solution: a high gas-liquid ratio water analyzer, comprising a measuring tube, which is arranged in a horizontal direction and has an oil inlet end and an oil outlet end; a transmitter, which is arranged in the measuring tube and is used to transmit radio frequency microwaves; and a detector, which is arranged below the transmitter and is used to receive the radio frequency microwaves emitted by the transmitter.

[0005] By adopting the above technical solution and using radio frequency microwave technology, by measuring the different dielectric constants of oil and water, accurate measurement can be achieved when the gas-liquid ratio is greater than 15:1, and stable water content measurement is achieved, avoiding the problem of large fluctuations in water content data in traditional analyzers in low liquid output and intermittent pumping wells.

[0006] Optionally, the water content analyzer further comprises a meter head, which is arranged at the measuring tube and is simultaneously connected to the emitter and the detector signals.

[0007] By adopting the above technical solution, the meter head is arranged at the measuring tube and connected with the emitter and detector signals, so that real-time processing and display of the measurement data are realized, and the operation convenience and data processing efficiency are improved.

[0008] Optionally, a measuring hole is provided at the bottom of the measuring tube, and two sealing flanges are provided on the measuring tube, the sealing flanges are located on both sides of the measuring hole, a sealing sleeve is provided at the bottom of the meter head, the sealing sleeve is sleeved outside the sealing flange, the transmitter is inserted from the bottom of the measuring hole, the detector is located directly below the transmitter and outside the measuring tube, and the detector and the transmitter are both connected to the sealing sleeve.

[0009] By adopting the above technical solution, the radio frequency microwave signal transmission path is made more stable, the accuracy and reliability of signal reception are enhanced, and the accuracy of moisture content measurement is thereby improved.

[0010] Optionally, the emitter is in the shape of a pancake.

[0011] By adopting the above technical solution, the area of ​​the disc-shaped transmitter is large and the test signal is stronger.

[0012] Optionally, a convergence port is provided at the oil outlet end of the measuring tube, and the difference between the radius of the convergence port and the radius of the measuring tube is not less than the radial distance between the bottom surface of the emitter and the measuring tube.

[0013] By adopting the above technical solution, the convergence port can make the incoming liquid converge at the bottom of the measuring tube. By controlling the radial distance between the bottom surface of the transmitter and the measuring tube, the amount of incoming liquid can be controlled to be always detected by the radio frequency signal, thereby improving the detection effect.

[0014] Optionally, the diameter of the measuring tube is DN70, the diameter of the emitter is 40 mm, the radial distance between the bottom surface of the emitter and the bottom of the measuring tube is 10 mm, and the diameter of the convergence port is DN50.

[0015] By adopting the above technical solution, a DN70 diameter cavity is used as the measuring tube, and the cavity cross-sectional area is 38cm 2 After adding the DN50 diameter constriction port design, the pipe structure cross-sectional area is 19m 2 , effective cross-sectional area: 19cm 2 . Equivalent to the standard DN50 pipe cross-sectional area, no pressure build-up problem will occur.

[0016] Optionally, a gas-liquid phase partition is provided in the measuring tube, and the gas-liquid phase partition is arranged at half the height of the measuring tube in the horizontal direction.

[0017] By adopting the above technical solution, a relatively compact structure is added with a gas-liquid phase partition, which can stabilize the gas phase circulation, thereby reducing the impact of the airflow on the liquid phase, thereby making the water content measurement result more accurate and solving the problem of gas content measurement at a high gas-liquid ratio higher than 50:1.

[0018] Optionally, a circuit algorithm module is integrated in the detector and the transmitter.

[0019] By adopting the above technical solution, the circuit algorithm module uses reactance measurement technology to effectively measure and distinguish scaling and waxing layers and minerals, and eliminates the measurement influence at the signal end through circuit algorithm design. Through double optimization processing, the influence of scaling, waxing, sediment impact and other factors on measurement stability is solved.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through radio frequency microwave technology, energy absorption differences can be generated between materials with different dielectric constants, thereby achieving accurate measurement of the water content of oil-water mixtures, solving the problem of low measurement accuracy of traditional analyzers under high gas-liquid ratio conditions; 2. The integrated circuit algorithm module introduces reactance technology, which can effectively measure and eliminate the impact of scaling and waxing layers on the signal, improving the measurement accuracy and stability of the equipment in scaling and waxing environments; 3. By combining the convergence port with the gas-liquid phase partition, the gas phase flow can be stabilized, thereby reducing the impact of the airflow on the liquid phase and making the water content measurement results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a high gas-liquid ratio water analyzer provided in an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the internal structure of the high gas-liquid ratio water analyzer provided in an embodiment of the present application.

[0023] Explanation of the reference numerals: 1-measuring tube; 101-oil inlet; 102-oil outlet; 103-measuring hole; 104-sealing flange; 105-detection area; 106-concentration port; 107-connecting flange; 2-emitter; 201-emitter mounting seat; 3-detector; 301-detection mounting seat; 4-meter head; 5-sealing sleeve; 501-sealing ring; 6-gas-liquid phase partition. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 This application is described in further detail.

[0025] The embodiment of the present application discloses a high gas-liquid ratio water analyzer.

[0026] like Figure 1 and Figure 2As shown, the high gas-liquid ratio water analyzer includes a measuring tube 1, a transmitter 2 and a detector 3, wherein the measuring tube 1 is arranged in a horizontal direction and has an oil inlet end 101 and an oil outlet end 102. In order to facilitate connection with the oil pipeline, connecting flanges 107 may be provided on both sides of the measuring tube 1. The transmitter 2 is arranged in the measuring tube 1 for transmitting radio frequency microwaves, and the detector 3 is arranged below the transmitter 2 and is used to receive the radio frequency microwaves emitted by the transmitter 2.

[0027] Based on radio frequency microwave technology, when radio frequency microwaves pass through materials with different dielectric constants, their energy can be absorbed. Based on the electrical characteristics of oil-water mixtures, that is, the dielectric constants of oil and water are different, the dielectric constant of water (68-70) and the dielectric constant of pure oil (2.5) are very different. Transmitter 2 sends a sinusoidal oscillation signal, which will cause changes in the phase and amplitude of the oscillation signal after passing through the measured liquid. The received radio frequency signal will also change as a result. By using the different energy of the absorbed waves of oil and water, a mathematical model is established and an algorithm mechanism is used for calculation to achieve the measurement of water content.

[0028] like Figure 1 and Figure 2 As shown, in order to display the data detected by the detector 3 and supply power to the detector 3 and the transmitter 2 at the same time, the water analyzer also includes a header 4, which is arranged at the measuring tube 1 and is connected to the transmitter 2 and the detector 3 signals, thereby realizing real-time processing and display of the measurement data and powering the detector 3 and the transmitter 2, thereby improving the convenience of operation and the efficiency of data processing.

[0029] like Figure 1 and Figure 2 As shown, specifically, a measuring hole 103 is provided at the bottom of the measuring tube 1, two sealing flanges 104 are provided on the measuring tube 1, and the sealing flanges 104 are located on both sides of the measuring hole 103. A sealing sleeve 5 is provided at the bottom of the meter head 4, and the sealing sleeve 5 is sleeved outside the sealing flange 104. The emitter 2 is inserted from the bottom of the measuring hole 103, and the detector 3 is located directly below the emitter 2 and outside the measuring tube 1. The detector 3 and the emitter 2 are both connected to the sealing sleeve 5. The sealing flanges 104 located on both sides of the measuring hole 103 are connected to the sealing sleeve 5 to ensure the sealing of the measuring hole 103, and at the same time form a detection area 105 that can accommodate incoming liquid.

[0030] Specifically, the detector 3 is connected to the sealing sleeve 5 through the detection mounting seat 301. The detector 3 is located directly below the transmitter 2 and outside the measuring tube 1, that is, the detector 3 is also located in the detection area 105, so that the liquid in the detection area 105 can cover the receiver, thereby ensuring the accuracy of the detection. In order to further improve the sealing performance, a sealing ring 501 can be provided between the sealing sleeve 5 and the sealing flange 104.

[0031] The transmitter 2 is connected to the sealing sleeve 5 through the transmitter mounting seat 201, and the transmitter mounting seat 201 is coaxially arranged with the detection mounting seat 301. The transmitter 2 is located directly above the detector 3 and inside the measuring tube 1. The transmitter 2 is in the shape of a round pancake, and the area of ​​the round pancake-shaped transmitter 2 is large, and the test signal is stronger.

[0032] like Figure 1 and Figure 2 As shown, the oil outlet end 102 of the measuring tube 1 is provided with a convergence port 106, and the difference between the radius of the convergence port 106 and the radius of the measuring tube 1 is not less than the radial distance between the bottom surface of the transmitter 2 and the measuring tube 1. The convergence port 106 enables the incoming liquid to not only stay in the detection area 105, but also to converge at the bottom of the measuring tube 1. By controlling the radial distance between the bottom surface of the transmitter 2 and the measuring tube 1, the amount of incoming liquid can be controlled to always contact the bottom surface of the transmitter 2, so that it can be detected by the radio frequency signal emitted by the transmitter 2, avoiding the gas phase from affecting the detection effect.

[0033] Specifically, the diameter of the measuring tube 1 is DN70, the diameter of the emitter 2 is 40mm, the radial distance between the bottom surface of the emitter 2 and the bottom of the measuring tube 1 is 10mm, and the diameter of the constriction port 106 is DN50. A DN70 diameter cavity is used as the measuring tube 1, and the cavity cross-sectional area is 38cm2. After adding the DN50 diameter constriction port 106 design, the cross-sectional area of ​​the tube structure is 19m2, and the effective cross-sectional area is 19cm2. It is equivalent to the cross-sectional area of ​​a standard DN50 pipe, and there will be no pressure holding problem.

[0034] When the gas-liquid ratio is higher than 50:1, the gas phase is likely to affect the liquid phase, resulting in fluctuations in the test results. In order to stabilize the gas phase flow, a gas-liquid phase partition 6 is provided in the measuring tube 1, and the gas-liquid phase partition 6 is horizontally arranged at half the height of the measuring tube 1. The relatively compact structure and the addition of the gas-liquid phase partition 6 can separate the gas phase and the liquid phase to a certain extent, thereby reducing the influence of the gas flow on the liquid phase and improving the accuracy of the test results.

[0035] In order to reduce the impact of scaling and waxing on the detection results, the detector 3 and the transmitter 2 are integrated with a circuit algorithm module. From an electrical point of view, scaling and waxing of the transmitter 2 or the receiver is equivalent to countless infinitesimal capacitors and resistors, which is equivalent to an impedance in the circuit. The impedance consumes energy and produces errors. The larger the impedance, the greater the measurement error. By introducing reactance technology, the meter head 4 can eliminate the measurement influence at the signal end after calculating the impedance through the circuit algorithm module while supplying power to the detector 3 and the transmitter 2.

[0036] Reactance technology is a technology used to reduce the impact of scaling and waxing on the test results. Circuit algorithm modules are integrated inside the detector and transmitter. These modules can measure the impedance of the scaling and waxing layer through a specific formula. Scaling and waxing are equivalent to countless infinitesimal capacitors and resistors, which are equivalent to an impedance in the circuit. Impedance consumes energy and produces errors. The larger the impedance, the greater the measurement error. While the reactance technology supplies power to the detector and transmitter through the meter, the circuit algorithm module uses the formula It can effectively measure the impedance of the scaling and waxing layer, where It is impedance, f is radio frequency, and j is a complex unit. By changing f and U, we can get multiple different I values. By comparing and calculating, we can get the impedance in the circuit.

[0037] The implementation principle of a high gas-liquid ratio water analyzer in the embodiment of the present application is as follows: the incoming liquid enters the measuring tube 1 from the oil inlet end 101 and flows into the detection area 105 surrounded by the sealing flange 104 and the sealing sleeve 5. When the liquid level in the detection area 105 is higher than the bottom wall of the measuring tube 1, the incoming liquid converges at the bottom of the measuring tube 1 under the action of the convergence port 106, and at the same time, it submerges the bottom surface of the detector 3 and the transmitter 2. The gas-liquid phase partition 6 in the measuring tube 1 is used to stabilize the gas phase flow, reduce the influence of the gas flow on the liquid phase, and improve the accuracy of the detection result. The transmitter 2 emits radio frequency microwaves in the measuring tube 1. When the radio frequency microwaves pass through the oil-water mixture, the phase and amplitude of the oscillation signal will change due to the different dielectric constants of oil and water. The detector 3 receives the radio frequency microwaves emitted by the transmitter 2, and uses the different characteristics of oil and water absorbing wave energy to calculate by establishing a mathematical model and an algorithm mechanism to achieve the measurement of water content. The meter head 4 is used to display the data detected by the detector 3, and at the same time, it supplies power to the detector 3 and the transmitter 2 to achieve real-time processing and display of the measurement data. The circuit algorithm module integrated in the detector 3 and the transmitter 2 measures the impedance of the scaling and waxing layer through the reactance technology and eliminates the measurement influence through the circuit algorithm model.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high gas-liquid ratio water analyzer, characterized in that: include: A measuring tube (1), the measuring tube (1) being arranged in a horizontal direction, and the measuring tube (1) having an oil inlet end (101) and an oil outlet end (102); A transmitter (2), the transmitter (2) being arranged in the measuring tube (1) and used for transmitting radio frequency microwaves; A detector (3), wherein the detector (3) is arranged below the transmitter (2) and is used to receive the radio frequency microwaves emitted by the transmitter (2).

2. The high gas-liquid ratio water analyzer according to claim 1, characterized in that: The water content analyzer also includes a meter head (4), which is arranged at the measuring tube (1) and is simultaneously connected to the emitter (2) and the detector (3) for signals.

3. The high gas-liquid ratio water analyzer according to claim 2, characterized in that: The bottom of the measuring tube (1) is provided with a measuring hole (103), the measuring tube (1) is provided with two sealing flanges (104), the sealing flanges (104) are located on both sides of the measuring hole (103), the bottom of the meter head (4) is provided with a sealing sleeve (5), the sealing sleeve (5) is sleeved outside the sealing flange (104), the transmitter (2) is inserted from the bottom of the measuring hole (103), the detector (3) is located directly below the transmitter (2) and outside the measuring tube (1), and the detector (3) and the transmitter (2) are both connected to the sealing sleeve (5).

4. The high gas-liquid ratio water analyzer according to claim 3, characterized in that: The emitter (2) is in the shape of a round cake.

5. The high gas-liquid ratio water analyzer according to claim 4, characterized in that: The oil outlet end (102) of the measuring tube (1) is provided with a convergence port (106), and the difference between the radius of the convergence port (106) and the radius of the measuring tube (1) is not less than the radial distance between the bottom surface of the emitter (2) and the measuring tube (1).

6. The high gas-liquid ratio water analyzer according to claim 5, characterized in that: The diameter of the measuring tube (1) is DN70, the diameter of the emitter (2) is 40 mm, the radial distance between the bottom surface of the emitter (2) and the bottom of the measuring tube (1) is 10 mm, and the diameter of the convergence port (106) is DN50.

7. The high gas-liquid ratio water analyzer according to claim 5, characterized in that: A gas-liquid phase partition plate (6) is provided in the measuring tube (1), and the gas-liquid phase partition plate (6) is arranged at half the height of the measuring tube (1) in the horizontal direction.

8. The high gas-liquid ratio water analyzer according to claim 1, characterized in that: The detector (3) and the transmitter (2) are integrated with circuit algorithm modules.

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