Dual-mode moisture content detection device

Abstract

The utility model discloses a dual-mode moisture content detection device. The dual-mode moisture content detection device comprises a measuring tube, a conductivity sensor, an electromagnetic sensor and a processor, the measuring tube is a hollow metal tube with an opening in the upper end, and the measuring tube is used for introducing crude oil to be measured; the conductivity sensor is provided with an electrode probe arranged in the measuring tube; the electromagnetic sensor comprises a transmitting coil and a measuring coil which are arranged on the outer side wall of the measuring tube at intervals, the transmitting coil is located on the lower portion of the outer side wall of the measuring tube, the measuring coil is located on the upper portion of the outer side wall of the measuring tube, and a shielding coil is arranged in the middle of the outer side wall of the measuring tube and located between the measuring coil and the transmitting coil. The shielding coil is connected in series with the transmitting coil; the processor is connected with the conductivity sensor and the measuring coil and carries a weighted fusion model. Dual-mode measurement of the water content of crude oil is achieved through the conductivity sensor and the electromagnetic sensor, and researchers can be helped to reasonably optimize production schemes, determine oil well productivity and improve oil extraction measures in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of digital oil fields, and particularly relates to a dual-mode water content detection device. Background Art

[0002] The water content of crude oil refers to the proportion of water in the crude oil to the total volume of the crude oil. It is one of the important indicators for measuring the quality of crude oil. Too high a water content will affect the transportation, storage and use of crude oil, so it is very important to accurately measure it.

[0003] The common methods for measuring the water content of crude oil are radioactive method and microwave method. The radioactive method injects radioactive isotopes into the crude oil and determines the water content of the crude oil based on the interaction between the radioactive isotopes and water molecules. Although this method has high measurement accuracy, it involves radioactive substances and therefore has great safety risks. Operators need to have relevant protective measures and the regulatory requirements are quite strict.

[0004] The microwave method uses the different absorption and reflection of energy by crude oil and water under microwave radiation to distinguish the water content. This method has certain advantages in measurement speed, but it is interfered by the corrosiveness and impurities of crude oil, which will lead to inaccurate measurement results. Utility Model Content

[0005] In view of the above-mentioned problems, the purpose of the utility model is to provide a dual-mode water content detection device, which realizes dual-mode measurement of crude oil water content through conductivity sensors and electromagnetic sensors. The effective collection of water content helps researchers to reasonably optimize production plans, determine oil well production capacity, analyze and select oil well development models based on its existence rate, and improve oil production measures in time when the water content of the oil reservoir exceeds the standard, which has a great improvement effect on improving production efficiency and reducing environmental pollution.

[0006] The technical solution of the utility model is: a dual-mode moisture content detection device, comprising:

[0007] The measuring tube is a metal tube which is hollow inside and has an opening at the upper end, and is used to introduce the crude oil to be measured;

[0008] A conductivity sensor, comprising an electrode probe disposed inside the measuring tube, the electrode probe being used to be immersed in the crude oil to be tested to detect the water content of the crude oil to be tested;

[0009] The electromagnetic sensor comprises a transmitting coil and a measuring coil which are arranged at intervals on the outer wall of the measuring tube, wherein the transmitting coil is located at the lower part of the outer wall of the measuring tube and is used to generate a sinusoidal alternating magnetic field, and the measuring coil is located at the upper part of the outer wall of the measuring tube and is used to receive a change signal after the sinusoidal alternating magnetic field acts on the crude oil to be measured, thereby obtaining the water content of the crude oil to be measured;

[0010] The processor is connected to the conductivity sensor and the measuring coil respectively. The processor carries a weighted fusion model for weighted fusion of the moisture contents respectively obtained by the conductivity sensor and the measuring coil to obtain a new moisture content.

[0011] Furthermore, a shielding coil is provided in the middle of the outer side wall of the measuring tube, the shielding coil is located between the measuring coil and the transmitting coil, and the shielding coil is connected in series with the transmitting coil.

[0012] Furthermore, the measuring tube is a metal tube with an inner diameter of 32 mm, an outer diameter of 36 mm, a side wall thickness of 2 mm, a relative magnetic permeability of 6000, and an inner and outer relative magnetic permeability of 1.1.

[0013] Furthermore, the transmitting coil uses 0.9 mm copper enameled wire with 100 turns.

[0014] Furthermore, the measuring coil is made of 0.2 mm copper enameled wire with 500 turns.

[0015] Furthermore, the shielding coil is made of 0.9 mm red copper enameled wire with 10 turns.

[0016] Furthermore, the distance between the transmitting coil and the shielding coil is 100 mm.

[0017] Furthermore, the distance between the shielding coil and the measuring coil is 10 mm.

[0018] The working principle of this utility model:

[0019] The crude oil to be tested is introduced into the measuring tube, and the electrode probe of the conductivity sensor is placed into the crude oil to be tested. The dissolved substances in the crude oil to be tested will interact with the current between the electrode probes to generate resistance. The conductivity sensor will measure the current and voltage in the crude oil to be tested, thereby calculating the conductivity. The water content of the crude oil to be tested is calculated based on the conductivity, which is recorded as the first water content;

[0020] The transmitting coil is controlled to generate a sinusoidal alternating magnetic field, which passes through the wall of the measuring tube and reacts with the crude oil to be measured in the measuring tube, thereby generating an eddy current of a certain intensity, and then generating a new alternating electromagnetic field, that is, generating a secondary electromotive force. The water content of the crude oil to be measured is calculated by measuring the secondary electromotive force through the measuring coil, which is recorded as the second water content;

[0021] The first moisture content and the second moisture content are weightedly fused through the weighted fusion model carried by the processor to obtain more accurate moisture content data, which is the final output moisture content result.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] (1) The dual-mode water content detection device is used to measure the water content of crude oil, avoiding the influence of impurities on the water content data collection under conventional conditions. The effective collection of water content helps researchers to reasonably optimize production plans, determine the production capacity of oil wells, analyze and select oil well development models based on its presence rate, and improve oil production measures in a timely manner when the water content in the reservoir exceeds the standard. It has a great improvement effect on improving production efficiency and reducing environmental pollution.

[0024] (2) The data collected by the water content sensor is used to determine the water content of each layer. Under the premise of ensuring safety, the oil layer can be exploited in layers, which improves oil recovery efficiency, reduces water production in the oil layer, and reduces the production of natural gas hydrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Among them, 1-measuring tube, 2-conductivity sensor, 21-electrode probe, 3-electromagnetic sensor, 31-transmitting coil, 32-measuring coil, 33-shielding coil, 4-processor. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 , the specific implementation methods of the utility model are described in detail. In the description of the utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0029] It should be noted that the circuit connections involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0030] Example: Figure 1 As shown, a dual-mode moisture content detection device includes a measuring tube 1, a conductivity sensor 2, an electromagnetic sensor 3 and a processor 4. Among them:

[0031] The measuring tube 1 is a metal tube with a hollow interior and an opening at the upper end. The measuring tube 1 is used to introduce the crude oil to be measured;

[0032] The conductivity sensor 2 has an electrode probe 21 disposed inside the measuring tube 1, and the electrode probe 21 is used to be immersed in the crude oil to be tested to detect the water content of the crude oil to be tested;

[0033] The electromagnetic sensor 3 includes a transmitting coil 31 and a measuring coil 32 which are arranged at intervals on the outer wall of the measuring tube 1. The transmitting coil 31 is located at the lower part of the outer wall of the measuring tube 1 and is used to generate a sinusoidal alternating magnetic field. The measuring coil 32 is located at the upper part of the outer wall of the measuring tube 1 and is used to receive a change signal after the sinusoidal alternating magnetic field acts on the crude oil to be measured, so as to obtain the water content of the crude oil to be measured. A shielding coil 33 is provided in the middle of the outer wall of the measuring tube 1. The shielding coil 33 is located between the measuring coil 32 and the transmitting coil 31, and the shielding coil 33 is connected in series with the transmitting coil 31. The tube 1 is a metal tube with an inner diameter of 32 mm, an outer diameter of 36 mm, a side wall thickness of 2 mm, a relative magnetic permeability of 6000, and an inner and outer relative magnetic permeability of 1.1; the transmitting coil 31 is a 0.9 mm copper enameled wire with 100 turns; the measuring coil 32 is a 0.2 mm copper enameled wire with 500 turns; the shielding coil 33 is a 0.9 mm copper enameled wire with 10 turns; the distance between the transmitting coil 31 and the shielding coil 33 is 100 mm; the distance between the shielding coil 33 and the measuring coil 32 is 10 mm;

[0034] The processor 4 is connected to the conductivity sensor 2 and the measuring coil 32 respectively. The processor 4 carries a weighted fusion model for weighted fusion of the moisture contents respectively obtained by the conductivity sensor 2 and the measuring coil 32 to obtain a new moisture content.

[0035] The working principle of the above embodiment is:

[0036] The crude oil to be tested is introduced into the measuring tube 1, and the electrode probe 21 of the conductivity sensor 2 is placed in the crude oil to be tested. The dissolved substances in the crude oil to be tested will interact with the current between the electrode probe 21 to generate resistance. The conductivity sensor 2 will measure the current and voltage in the crude oil to be tested, thereby calculating the conductivity. The water content of the crude oil to be tested is calculated based on the conductivity, which is recorded as the first water content;

[0037] The transmitting coil 31 is controlled to generate a sinusoidal alternating magnetic field. The sinusoidal alternating magnetic field passes through the wall of the measuring tube 1 and reacts with the crude oil to be measured in the measuring tube 1, thereby generating an eddy current of a certain intensity, and then generating a new alternating electromagnetic field, that is, generating a secondary electromotive force. The water content of the crude oil to be measured is calculated by measuring the secondary electromotive force through the measuring coil 32, and is recorded as the second water content;

[0038] The first moisture content and the second moisture content are weightedly fused by the weighted fusion model carried by the processor 4 to obtain more accurate moisture content data, which is the moisture content result of the final output.

[0039] The specific models of the above electronic components are not specially specified, and ordinary products available on the market can be selected as long as they can meet the use requirements of the utility model.

[0040] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A dual-mode moisture content detection device, characterized in that: include: A measuring tube (1), which is a metal tube with a hollow interior and an opening at the upper end, and is used to introduce the crude oil to be measured; A conductivity sensor (2), comprising an electrode probe (21) arranged inside the measuring tube (1), wherein the electrode probe (21) is used to be immersed in the crude oil to be tested to detect the water content of the crude oil to be tested; The electromagnetic sensor (3) comprises a transmitting coil (31) and a measuring coil (32) which are arranged at intervals on the outer wall of the measuring tube (1), wherein the transmitting coil (31) is located at the lower part of the outer wall of the measuring tube (1) and is used to generate a sinusoidal alternating magnetic field, and the measuring coil (32) is located at the upper part of the outer wall of the measuring tube (1) and is used to receive a change signal after the sinusoidal alternating magnetic field acts on the crude oil to be measured, thereby obtaining the water content of the crude oil to be measured; A processor (4) is connected to the conductivity sensor (2) and the measuring coil (32) respectively. The processor (4) carries a weighted fusion model for weighted fusion of the moisture contents respectively obtained by the conductivity sensor (2) and the measuring coil (32) to obtain a new moisture content.

2. A dual-mode moisture content detection device as claimed in claim 1, characterized in that: A shielding coil (33) is provided in the middle of the outer wall of the measuring tube (1); the shielding coil (33) is located between the measuring coil (32) and the transmitting coil (31), and the shielding coil (33) is connected in series with the transmitting coil (31).

3. A dual-mode moisture content detection device as claimed in claim 1, characterized in that: The measuring tube (1) is a metal tube with an inner diameter of 32 mm, an outer diameter of 36 mm, a side wall thickness of 2 mm, a relative magnetic permeability of 6000, and an inner and outer relative magnetic permeability of 1.

1.

4. A dual-mode moisture content detection device as claimed in claim 1, characterized in that: The transmitting coil (31) is made of 0.9 mm copper enameled wire with 100 turns.

5. A dual-mode moisture content detection device as claimed in claim 1, characterized in that: The measuring coil (32) is made of 0.2 mm red copper enameled wire with 500 turns.

6. A dual-mode moisture content detection device as claimed in claim 2, characterized in that: The shielding coil (33) is made of 0.9 mm red copper enameled wire with 10 turns.

7. A dual-mode moisture content detection device as claimed in claim 2, characterized in that: The distance between the transmitting coil (31) and the shielding coil (33) is 100 mm.

8. A dual-mode moisture content detection device as claimed in claim 2, characterized in that: The distance between the shielding coil (33) and the measuring coil (32) is 10 mm.

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