Water finding and plugging device and process method

Abstract

The invention discloses a water finding and plugging device and a process method, and relates to the technical field of oil extraction. The at least two packers are arranged in the tubular column, the packers are used for separating independent oil layers, and the packers are further used for being opened or closed according to control instructions; the intelligent production allocation devices are arranged in the independent oil layers, the intelligent production allocation processors correspond to the independent oil layers in a one-to-one mode, and the intelligent production allocation processors are used for recognizing the water content of oil-water two-phase flow in the independent oil layers; the intelligent production allocation processor is further used for being opened or closed according to the control instruction so as to control whether the oil-water two-phase flow can penetrate through the pipe column or not. And the control terminal is in communication connection with the packer and the intelligent production allocation processor, and the control terminal is used for generating the control instruction. The technical problem that accurate layered control and mining cannot be achieved in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the field of oil production technology, and in particular to a water-finding and blocking device and a process method. Background Art

[0002] With the long-term development of oil fields using the thin oil water injection technology, the contradictions between and within layers are prominent due to the influence of reservoir heterogeneity. The injected water preferentially enters the high permeability layer and the river direction. As the water injection multiples increase, multiple layers of high water content and alternating distribution of high and low water content layers are presented. The existing pressure wave conduction method will cause confusion in the working state of the water control switch, making it difficult for the existing water plugging device to achieve the purpose of multi-layer control and production and layered regulation. Summary of the invention

[0003] The embodiments of the present application provide a water blocking device and process method, which can solve the technical problem that the prior art cannot accurately control production in layers.

[0004] A first aspect of an embodiment of the present application provides a water blocking device, the device comprising:

[0005] Pipeline;

[0006] At least two packers, the packers are arranged in the pipe string, the packers are used to separate independent oil layers, and the packers are also used to open or close according to control instructions;

[0007] At least two intelligent production allocation processors, the intelligent production allocation processors are arranged in the independent oil layer, the intelligent production allocation processors correspond to the independent oil layer one by one, the intelligent production allocation processors are used to identify the water content of the oil-water two-phase flow in the independent oil layer, and the intelligent production allocation processors are also used to open or close according to the control instructions to control whether the oil-water two-phase flow can pass through the pipe string;

[0008] A control terminal is communicatively connected with the packer and the intelligent production allocation processor, and is used to generate the control instruction.

[0009] In some embodiments, the intelligent production allocation processor includes:

[0010] An impedance sensor, wherein the impedance sensor is used to identify the water content of the oil-water two-phase flow;

[0011] The control terminal is also used to turn on or off the intelligent production allocation processor according to the moisture content.

[0012] In some embodiments, the intelligent production allocation processor includes:

[0013] A driving unit, the driving unit is used to control the flow rate of the oil-water two-phase flow passing through the pipe string;

[0014] A testing unit, wherein the testing unit is used to test the state parameters of the independent oil layer.

[0015] The control terminal is also used to control the switching amplitude of the driving unit according to the state parameter.

[0016] In some embodiments, the intelligent production allocation processor further includes:

[0017] A mass flow meter, the mass flow meter is used to measure the mass flow rate of the oil-water two-phase flow;

[0018] The control terminal is also used to obtain water production and oil production according to the mass flow rate and the water content.

[0019] In some embodiments, the impedance sensor comprises:

[0020] Grounding electrode;

[0021] an excitation electrode, the excitation electrode being used to establish an electric field between the ground electrodes based on an excitation signal;

[0022] A measuring electrode is provided between the ground electrode and the excitation electrode, and is used to identify the equivalent resistance of the oil-water two-phase flow.

[0023] A second aspect of the embodiment of the present application provides a water blocking process method, which is applied to the water blocking device as described in any one of the first aspects, and the method comprises:

[0024] Obtaining the water content of the oil-water two-phase flow in each of the independent oil layers;

[0025] The oil-water relationship is determined based on the water content of each layer, and the oil-water relationship is used to represent the oil and gas reserves in each of the independent oil layers.

[0026] In some embodiments, it further comprises:

[0027] Determine a high permeability layer according to the oil-water relationship, wherein the high permeability layer is used to represent an independent oil layer whose water content exceeds a preset value;

[0028] The intelligent production allocation processor corresponding to the high permeability layer is closed to prevent the oil-water two-phase flow from passing through the pipe string.

[0029] In some embodiments, it further comprises:

[0030] Obtaining formation pressure values ​​corresponding to independent oil layers other than the high permeability layer;

[0031] According to the comparison relationship between the formation pressure value and the preset pressure value, the opening of the intelligent production allocation processor is determined, and the opening is used to control the flow rate of the oil-water two-phase flow through the pipe string.

[0032] In some embodiments, the step of determining the opening of the intelligent production allocation processor according to the comparison relationship between the formation pressure value and the preset pressure value includes:

[0033] When the formation pressure value is less than the preset pressure value, adjusting the opening to be greater than the preset opening;

[0034] When the formation pressure value is greater than the preset pressure value, the opening is adjusted to be smaller than the preset opening.

[0035] In some embodiments, it further comprises:

[0036] When the liquid supply capacity of the independent oil layer is insufficient, the injection layer position, water injection volume and water injection pressure of the water injection well are controlled.

[0037] In summary, the embodiment of the present application provides a water blocking device and process method, wherein the device includes: a tubing string; at least two packers, the packers are arranged in the tubing string, the packers are used to separate independent oil layers, and the packers are also used to open or close according to control instructions; at least two intelligent production allocation processors, the intelligent production allocation processors are arranged in the independent oil layers, the intelligent production allocation processors correspond to the independent oil layers one by one, the intelligent production allocation processors are used to identify the water content of the oil-water two-phase flow in the independent oil layers, and the intelligent production allocation processors are also used to open or close according to the control instructions to control whether the oil-water two-phase flow can pass through the tubing string; a control terminal, the control terminal is connected to the packers and the intelligent production allocation processors in communication, and the control terminal is used to generate the control instructions. The control terminal can issue control instructions, and based on the control instructions, the middle and lower packers can be closed, the upper packer can be opened, and the upper intelligent production allocation processor can be opened, so that the oil-water two-phase flow in the upper independent oil layer can be pumped out by the oil pump. By setting the control terminal to generate control instructions, the packer and intelligent production processor can be opened or closed based on the control instructions, so that different oil layers can be accurately layered and controlled.

[0038] Correspondingly, the water blocking process method provided in the embodiment of the present application also has the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 A schematic structural diagram of a possible water blocking device provided in an embodiment of the present application;

[0041] Figure 2 A schematic structural diagram of a possible intelligent production allocation processor provided in an embodiment of the present application;

[0042] Figure 3 A schematic flow chart of a possible water blocking process provided in an embodiment of the present application;

[0043] in, Figure 1 to Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0044] 100 control terminal, 200 communication cable, 300 oil well pump, 400 packer, 500 intelligent production allocation processor, 510 mass flow meter, 520 drive unit, 521 circuit device, 522 drive mechanism, 523 connecting rod, 524 sealing rubber ring, 525 piston, 530 impedance sensor, 531 grounding electrode, 532 measuring electrode, 533 excitation electrode, 540 test unit, 541 pressure tester, 542 temperature tester, 550 liquid inlet channel, 600 tubing string, 700 wire plug. DETAILED DESCRIPTION

[0045] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0046] In the first aspect, the present application provides a water blocking device, such as Figure 1As shown, Figure 1 A schematic structural diagram of a possible water blocking device provided in an embodiment of the present application, the device comprising:

[0047] A tubing string 600; at least two packers 400, the packers 400 are arranged in the tubing string 600, the packers 400 are used to separate independent oil layers, and the packers 400 are also used to open or close according to control instructions; at least two intelligent production allocation processors 500, the intelligent production allocation processors 500 are arranged in independent oil layers, the intelligent production allocation processors 500 correspond to independent oil layers one by one, the intelligent production allocation processors 500 are used to identify the water content of the oil-water two-phase flow in the independent oil layers, and the intelligent production allocation processors 500 are also used to open or close according to control instructions to control whether the oil-water two-phase flow can pass through the tubing string 600; a control terminal 100, the control terminal 100 is communicatively connected with the packers 400 and the intelligent production allocation processors 500, and the control terminal 100 is used to generate control instructions.

[0048] It can be explained that at least two packers 400 are arranged inside the tubing string 600 of the water blocking device, so that it can be separated into at least two independent oil layers, and each independent oil layer is provided with an intelligent production allocation processor 500, and the intelligent production allocation processor 500 can be used to identify the water content of the oil-water two-phase flow in each independent oil layer. The packer 400 and the intelligent production allocation processor 500 can be operated according to the control instruction, and the packer 400 is opened or closed according to the control instruction, so that the oil-water two-phase flow can be allowed or prohibited to be drawn along the tubing string 600, and the intelligent production allocation processor 500 can control whether the oil-water two-phase flow can pass through the tubing string 600 according to the control instruction, so that the water content of the oil-water two-phase flow in the corresponding independent oil layer can be identified. It is easy to understand that the oil-water two-phase flow can only be drawn along the tubing string 600 when the packer 400 and the intelligent production allocation processor 500 are both in the open state. The above-mentioned water blocking device also includes a control terminal 100, and the control terminal 100 is used to generate the above-mentioned control instruction.

[0049] For example, Figure 1 As shown, the control terminal 100 may be a computer or other intelligent device, and may transmit control instructions to the packer 400 and the intelligent production allocation processor 500 through the communication cable 200. The packer 400 may be an electric-driven packer 400. Figure 1The three packers 400 in the middle divide the oil layer into three independent oil layers, and the bottom is plugged with a wire plug 700. Each independent oil layer includes an intelligent production allocation processor 500. The intelligent production allocation processor 500 may include a pressure sensor, and the water content is obtained by identifying the pressure wave in the oil-water two-phase flow in the independent oil layer. If it is necessary to obtain the oil-water two-phase flow in the upper independent oil layer, the control terminal 100 can issue a control instruction. Based on the control instruction, the middle and lower packers 400 can be closed, the upper packer 400 can be opened, and the upper intelligent production allocation processor 500 can be opened, so that the oil-water two-phase flow in the upper independent oil layer can be pumped out by the oil pump 300. By setting the control terminal 100 to generate control instructions, the packers 400 and the intelligent production allocation processor 500 can be opened or closed based on the control instructions, so that different oil layers can be accurately layered and controlled.

[0050] According to some embodiments, Figure 2 As shown, Figure 2 A schematic structural diagram of an intelligent production allocation processor provided in an embodiment of the present application, the intelligent production allocation processor 500 includes: an impedance sensor 530, the impedance sensor 530 is used to identify the water content of the oil-water two-phase flow; the control terminal 100 is also used to turn on or off the intelligent production allocation processor 500 according to the water content.

[0051] It can be explained that the intelligent production allocation processor 500 includes an impedance sensor 530, and the impedance sensor 530 can include a resistive sensor, a capacitive sensor, and an inductive sensor. After the intelligent production allocation processor 500 is turned on, the oil-water two-phase flow in the independent oil layer passes through the impedance sensor 530 to determine the water content. It is easy to explain that the higher the water content, the higher the water content in the oil-water two-phase flow in the corresponding independent oil layer, and the lower the oil and gas content. When the water content in the oil-water two-phase flow in the corresponding independent oil layer exceeds a certain level, the control terminal 100 can issue a control instruction to shut down the intelligent production allocation processor 500 of the corresponding independent oil layer, so that the oil-water two-phase flow in the corresponding independent oil layer can be not used.

[0052] According to some embodiments, Figure 2 As shown, the intelligent production allocation processor 500 includes: a driving unit 520, which is used to control the flow rate of the oil-water two-phase flow through the pipe string 600; and a testing unit 540, which is used to test the state parameters of the independent oil layer. The control terminal 100 is also used to control the switching amplitude of the driving unit 520 according to the state parameters.

[0053] It can be explained that the intelligent production allocation processor 500 includes a driving unit 520 and a testing unit 540. The driving unit 520 can control the flow rate of the oil-water two-phase flow through the tubing string 600. The testing unit 540 can be used to test the state parameters of the independent oil layer. The state parameters may include formation temperature, formation pressure, etc. The control terminal 100 can control the switching amplitude of the driving unit 520 based on the acquired state parameters, thereby controlling the flow rate of the oil-water two-phase flow through the tubing string 600.

[0054] Exemplarily, the driving unit 520 may include a circuit device 521, a driving mechanism 522, a connecting rod 523, a sealing rubber ring 524, and a piston 525, and the testing unit 540 may include a pressure tester 541, a temperature tester 542, and a liquid inlet channel 550. After opening the liquid inlet channel 550, the circuit device 521 may control the driving mechanism 522 to drive the piston 525 up and down through the connecting rod 523 based on the aforementioned control instruction, and the flow rate of the oil-water two-phase flow passing through the pipe string 600 may be controlled according to the closed gap of the piston 525. The sealing rubber ring 524 is used to prevent the oil-water two-phase flow from leaking. The pressure tester 541 may be used to obtain the corresponding formation pressure, and the temperature tester 542 may be used to obtain the corresponding formation temperature. The control terminal 100 may generate a control instruction based on the formation pressure and the formation temperature, and the control instruction may be used to control the driving unit 520.

[0055] It should be noted that, under normal circumstances, the higher the formation temperature, the higher the oil and gas content of the independent oil layer, and the opening of the drive unit 520 can be increased to obtain more oil and gas. The higher the corresponding formation pressure, the smaller the opening of the drive unit 520 can be adjusted, and the lower the corresponding formation pressure, the larger the opening of the drive unit 520 can be adjusted, thereby reducing the interference of the independent oil layer with too high pressure on other independent oil layers during the oil production process, and the independent oil layer with too low pressure can also increase the flow rate by increasing the opening of the drive unit 520, thereby increasing the amount of oil and gas obtained from the independent oil layer with too low pressure.

[0056] According to some embodiments, Figure 2 As shown, the intelligent production allocation processor 500 also includes: a mass flow meter 510, which is used to measure the mass flow rate of the oil-water two-phase flow; the control terminal 100 is also used to obtain the water production and oil production according to the mass flow rate and water content.

[0057] It can be explained that the intelligent production allocation processor 500 can also include a mass flow meter 510, which can measure the mass flow rate of the oil-water two-phase flow, and the water production and oil production can be obtained based on the water content and the mass flow rate.

[0058] For example, Figure 2The mass flow meter 510 can be arranged on the upper side of the driving unit 520. The oil-water two-phase flow is first controlled by the driving power supply and then measured by the mass flow meter 510, so that the real-time water production and oil production can be obtained.

[0059] According to some embodiments, Figure 2 As shown, the impedance sensor 530 includes: a ground electrode 531; an excitation electrode 533, the excitation electrode 533 is used to establish an electric field between the ground electrode 531 based on an excitation signal; a measuring electrode 532, the measuring electrode 532 is arranged between the ground electrode 531 and the excitation electrode 533, and the measuring electrode 532 is used to identify the equivalent resistance of the oil-water two-phase flow.

[0060] It can be explained that the impedance sensor 530 includes a ground electrode 531, an excitation electrode 533 and a measuring electrode 532, and the measuring electrode 532 is arranged between the ground electrode 531 and the excitation electrode 533. When the excitation electrode 533 receives an excitation source, an electric field is established between the ground electrode 531 and the excitation electrode 533, thereby generating an equivalent resistance when the oil-water two-phase flow passes through the impedance sensor 530. According to the theoretical model between the impedance and the phase holding rate of the fluid, the water content of the oil-water two-phase flow can be indirectly calculated. Assume that the oil-water two-phase flow flowing through the impedance sensor 530

[0061] Exemplarily, the ground electrode 531, the excitation electrode 533 and the measuring electrode 532 can be electrode rings, so that the oil-water two-phase flow can pass smoothly through the impedance sensor 530. When the excitation source is applied to the excitation electrode 533, a sensitive electric field is established in the measured area. When the two-phase flow flows in the sensor, the output of the measuring electrode 532 can detect the equivalent resistance in the measured area in real time. It is easy to understand that oil and gas are insoluble in water, and the random changes in the size distribution and spatial distribution of oil bubbles will cause changes in the conductivity of the oil-water two-phase flow. Assume that the mixed phase conductivity of the oil-water two-phase flow flowing through the impedance sensor 530 is σ m , the conductivity of the continuous water phase σ w , the equipment calibration coefficient is K, the input current on the measuring electrode 532 is I1 when mixed phase, the output voltage on the measuring electrode 532 is V1, the input current on the measuring electrode 532 is I2 when continuous water phase, the output voltage on the measuring electrode 532 is V2, which can be expressed by the following formulas (1) (2):

[0062]

[0063]

[0064] According to the above formula (1) and formula (2), the moisture content σ can be determined, which can be obtained by the following formula (3):

[0065]

[0066] In a second aspect, the present application provides a method for finding and blocking water, which is applied to any of the above-mentioned water blocking devices in the first aspect, such as Figure 3 As shown, Figure 3 A schematic flow chart of a water blocking process provided in this application specifically includes: S110-S120,

[0067] S110, obtaining the water content of the oil-water two-phase flow in each independent oil layer;

[0068] Exemplarily, the water content of the oil-water two-phase flow in each independent oil layer is obtained, such as Figure 2 As shown, each independent oil layer includes an intelligent production allocation processor 500, and the intelligent production allocation processor 500 of each independent oil layer is gradually turned on, and it is always ensured that only one intelligent production allocation processor 500 of an independent oil layer is working. The water content of the oil-water two-phase flow in each independent oil layer can be determined based on the intelligent production allocation processor 500 of each independent oil layer.

[0069] S120, determining an oil-water relationship based on the water content of each layer, where the oil-water relationship is used to represent the oil and gas reserves in each independent oil layer.

[0070] For example, after obtaining the water content of the oil-water two-phase flow in each independent oil layer, the oil-water relationship of each oil layer can be obtained according to the different water content in each independent oil layer, which can reflect the oil and gas reserves in each independent oil layer.

[0071] According to some embodiments, further comprising:

[0072] Determine the high permeability layer based on the oil-water relationship. The high permeability layer is used to represent an independent oil layer with a water content exceeding a preset value;

[0073] The intelligent production allocation processor 500 corresponding to the high permeability layer is closed to prevent the oil-water two-phase flow from passing through the pipe string 600.

[0074] For example, a high permeability layer can be determined based on the oil-water relationship. A high permeability layer represents an independent oil layer with a water content exceeding a preset value, and a high permeability layer is an oil layer with a low oil and gas content. The intelligent production allocation processor 500 corresponding to the high permeability layer is turned off so that the oil-water two-phase flow corresponding to the high permeability layer cannot pass through the pipe string 600.

[0075] According to some embodiments, further comprising:

[0076] Obtain the formation pressure value corresponding to the independent oil layer except the high permeability layer;

[0077] According to the comparison relationship between the formation pressure value and the preset pressure value, the opening degree of the intelligent production allocation processor 500 is determined, and the opening degree is used to control the flow rate of the oil-water two-phase flow through the pipe string 600.

[0078] For example, the formation pressure values ​​corresponding to the independent oil layers except the high permeability layer are obtained, and the formation pressure value of each layer is compared with the preset pressure value, and the opening of the intelligent production allocation processor 500 is determined according to the comparison relationship, and the opening can be used to control the flow rate of the oil-water two-phase flow through the string 600. By comparing the relationship between different formation pressure values ​​and the preset value, the opening of the intelligent production allocation processor 500 in different independent oil layers is determined, so that the flow rate of the oil-water two-phase flow through the string 600 can be controlled.

[0079] According to some embodiments, the step of determining the opening degree of the intelligent production allocation processor 500 according to the comparison relationship between the formation pressure value and the preset pressure value includes:

[0080] When the formation pressure value is less than the preset pressure value, the opening is adjusted to be greater than the preset opening;

[0081] When the formation pressure value is greater than the preset pressure value, the opening is adjusted to be smaller than the preset opening.

[0082] For example, when the formation pressure value obtained from a certain independent oil layer is less than the preset pressure value, the opening of the corresponding intelligent production allocation processor 500 is adjusted to be greater than the preset opening; when the formation pressure value obtained from a certain independent oil layer is greater than the preset pressure value, the opening of the corresponding intelligent production allocation processor 500 is adjusted to be less than the preset opening. It is easy to understand that the oil-water two-phase flow corresponding to the high-pressure layer will affect the oil-water two-phase flow of the low-pressure layer during the exploitation process, making it difficult to exploit the oil-water two-phase flow of the low-pressure layer normally, and the oil layer with too low pressure is also difficult to exploit normally. By adjusting the opening of the intelligent production allocation processor 500 of different independent oil layers, the flow rate of the oil-water two-phase flow can be controlled, thereby reducing the impact of high pressure or low pressure on the exploitation of oil and gas.

[0083] According to some embodiments, further comprising:

[0084] When the fluid supply capacity of the independent oil layer is insufficient, control the injection layer position, injection volume and injection pressure of the injection well.

[0085] For example, when the liquid supply capacity of an independent oil layer is insufficient, the flow rate of the oil-water two-phase flow through the intelligent production allocation processor 500 is too low, so that the water content of the corresponding independent oil layer cannot be obtained. The injection layer of the water injection well can be controlled to correspond to the independent oil layer with insufficient liquid supply capacity, and the water injection amount and injection pressure of the corresponding injection layer can be increased to improve the liquid supply capacity of the corresponding independent oil layer, so that the intelligent production allocation processor 500 can normally obtain the water content of the corresponding independent oil layer.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A water blocking device, characterized in that: include: Pipeline; At least two packers, the packers are arranged in the pipe string, the packers are used to separate independent oil layers, and the packers are also used to open or close according to control instructions; At least two intelligent production allocation processors, the intelligent production allocation processors are arranged in the independent oil layer, the intelligent production allocation processors correspond to the independent oil layer one by one, the intelligent production allocation processors are used to identify the water content of the oil-water two-phase flow in the independent oil layer, and the intelligent production allocation processors are also used to open or close according to the control instructions to control whether the oil-water two-phase flow can pass through the pipe string; A control terminal is communicatively connected with the packer and the intelligent production allocation processor, and is used to generate the control instruction.

2. The water blocking device according to claim 1, characterized in that: The intelligent production allocation processor comprises: An impedance sensor, wherein the impedance sensor is used to identify the water content of the oil-water two-phase flow; The control terminal is also used to turn on or off the intelligent production allocation processor according to the moisture content.

3. The water blocking device according to claim 1, characterized in that: The intelligent production allocation processor comprises: A driving unit, the driving unit is used to control the flow rate of the oil-water two-phase flow passing through the pipe string; A testing unit, wherein the testing unit is used to test the state parameters of the independent oil layer; The control terminal is also used to control the switching amplitude of the driving unit according to the state parameter.

4. The water blocking device according to claim 2, characterized in that: The intelligent production allocation processor also includes: A mass flow meter, the mass flow meter is used to measure the mass flow rate of the oil-water two-phase flow; The control terminal is also used to obtain water production and oil production according to the mass flow rate and the water content.

5. The water blocking device according to any one of claims 2 to 4, characterized in that: The impedance sensor comprises: Grounding electrode; an excitation electrode, the excitation electrode being used to establish an electric field between the ground electrodes based on an excitation signal; A measuring electrode is disposed between the ground electrode and the excitation electrode, and is used to identify the equivalent resistance of the oil-water two-phase flow.

6. A water blocking process, characterized in that: Applied to the water blocking device according to any one of claims 1 to 5, the method comprises: Obtaining the water content of the oil-water two-phase flow in each of the independent oil layers; The oil-water relationship is determined based on the water content of each layer, and the oil-water relationship is used to represent the oil and gas reserves in each of the independent oil layers.

7. The method according to claim 6, characterized in that Also includes: Determine a high permeability layer according to the oil-water relationship, wherein the high permeability layer is used to represent an independent oil layer whose water content exceeds a preset value; The intelligent production allocation processor corresponding to the high permeability layer is closed so that the oil-water two-phase flow cannot pass through the pipe string.

8. The method according to claim 7, characterized in that Also includes: Obtaining formation pressure values ​​corresponding to independent oil layers other than the high permeability layer; According to the comparison relationship between the formation pressure value and the preset pressure value, the opening of the intelligent production allocation processor is determined, and the opening is used to control the flow rate of the oil-water two-phase flow through the pipe string.

9. The method according to claim 8, characterized in that The step of determining the opening degree of the intelligent production allocation processor according to the comparison relationship between the formation pressure value and the preset pressure value includes: When the formation pressure value is less than the preset pressure value, adjusting the opening to be greater than the preset opening; When the formation pressure value is greater than the preset pressure value, the opening is adjusted to be smaller than the preset opening.

10. The method according to any one of claims 6 to 9, characterized in that: Also includes: When the liquid supply capacity of the independent oil layer is insufficient, the injection layer position, water injection volume and water injection pressure of the water injection well are controlled.

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