A multi-parameter testing device for injection-production wells and a water injection and oil production testing method thereof

Abstract

This invention belongs to the field of injection and production testing, and specifically discloses a multi-parameter testing device for injection and production wells and its water injection and oil production testing method. It consists of an upper connector, a lower connector, a middle connector, a parameter testing component, and a control component. Each component adopts a highly integrated modular design and has the same interface as the main instrument. It can be used individually or in full sections according to the required parameters and well conditions. It can realize parameter measurement and also perform unified testing on the accuracy and precision of various testing methods, which can meet the needs of production testing as well as scientific research testing.

Description

Technical Field

[0001] This invention belongs to the field of injection and production testing, specifically a multi-parameter testing device for injection and production wells and its water injection and oil production testing method. Background Technology

[0002] As oilfields are explored and developed, crude oil is continuously extracted from the formation, leading to a gradual depletion of formation energy and a decrease in oil recovery rate. Without sufficient replenishment energy, the pressure between oil layers continuously decreases during production. To replenish formation energy and improve recovery, water injection technology is frequently used in oilfield enhancement. Traditional water injection and oil production technologies are indiscriminate, lacking the ability to monitor the direction of water flow and whether it reaches the target layer. This can easily result in water flooding of oil layers and insufficient replenishment of energy to the target layer. Furthermore, indiscriminate oil production, with multiple layers being extracted simultaneously, easily leads to the extraction of high-pressure, high-water-cut oil layers, highlighting inter-layer conflicts. High-water-cut layers can backflow and seal off low-water-cut layers, resulting in high water content in the produced fluid. This has led to the development of stratified water injection and stratified oil production enhancement technologies. Stratified water injection involves installing packers in injection wells to separate formations with significant differences. Then, testing devices are used for stratified water injection, controlling the water injection volume in high-permeability layers and enhancing the injection in medium- and low-permeability layers, ensuring that each layer can function effectively. Layered oil recovery involves separating oil-producing layers in a formation and using interlayer testing devices to select and extract oil layers with high pressure and low water cut, while sealing off oil layers with high water cut and negative pressure. This resolves the interlayer conflict, effectively stabilizes oil production and controls water, and improves oil recovery rate.

[0003] Water injection wells are production enhancement wells, while oil production wells are production wells. Their fluid flow directions are opposite: water injection wells inject fluid from the surface into the formation, while oil production wells produce fluid from the formation to the surface. Both serve as means to improve oilfield efficiency and increase production. Under certain circumstances, there is no fixed boundary between water injection and oil production wells; water injection or oil production can be determined based on testing results. However, due to the opposite fluid flow directions and the differences in required technical parameters and testing environments, the structure and sub-sections of the testing equipment for injection and production wells differ significantly, making them incompatible and unable to be directly used when interchanged.

[0004] During oil extraction, the produced fluid is often a mixture of crude oil, natural gas, and water from the formation. Especially in the middle and later stages of oilfield development, the amount of water mixed in the produced fluid is large and the water content is high. The mixing and flow of oil, gas, and water is a very common phenomenon. The production volume and water content of an oil well or a specific oil-producing layer are important technical indicators in the process of oilfield development.

[0005] One of the important methods for measuring the water cut of downhole fluids is the electrical method, which typically uses the probe method, conductivity method, and capacitance method. The probe method measures the water cut based on the difference in conductivity between the phases in the fluid being measured. Its measurement accuracy is greatly affected by complex flow patterns, and the measurement has a certain hysteresis effect. The conductivity method determines the water cut by measuring the conductivity of each phase in the fluid, and it is low in cost and has a fast response speed. The capacitance method calculates the water cut by measuring the average dielectric constant of the mixed fluid between the electrodes of the capacitance sensor flowing through the measuring pipe section. It is only suitable for measuring small flow rates, and it loses the ability to distinguish between oil and water phases at high water cuts.

[0006] The main methods for testing downhole fluid flow rate are the ultrasonic method and the pressure difference method. The ultrasonic method utilizes the fact that when ultrasonic waves are incident on the fluid being tested, the waves propagate through the fluid carrying information about the fluid velocity. The received ultrasonic signals are then used to measure the fluid velocity and flow rate. The pressure difference method utilizes the relationship between fluid pressure and flow rate. By analyzing the dynamic pressure and flow characteristics between two points in the pipe through which the fluid flows, and using sensors to measure the pressure values, the flow rate value is obtained.

[0007] Existing flow and water content testing methods in the market have shortcomings under certain testing environments, making it impossible to achieve completely accurate measurements. Furthermore, existing testing devices only have one type of testing section for measuring the same parameter. Therefore, under complex well conditions, the measurement of flow and water content of downhole fluids is mostly qualitative rather than quantitative, and the accuracy and precision cannot be guaranteed.

[0008] Chinese patent CN219528986U describes an integrated water injection and oil production device. This device has a single-stage structure and can measure downhole pressure, temperature, and flow rate parameters, but it cannot measure the water content of the well fluid. Furthermore, its flow rate measurement method is the relative pressure difference method, which uses two separate sensors to measure the pressure values ​​before and after the throttling device to calculate the flow rate. While the sensors also measure internal pressure and formation pressure, the accuracy and precision of the measurements are low. Moreover, it is not fully compatible with both water injection and oil production; after switching between oil production and water injection wells, the internal and external pressure sensors need to be switched at the surface, and the algorithm needs to be adjusted. It also cannot obtain the important parameter of water content in the produced fluid during oil well testing.

[0009] In summary, there is an urgent need to develop a universal testing device for water injection and oil production wells, which can select appropriate testing methods according to well conditions and testing requirements, and achieve a multi-parameter testing device with high precision and high accuracy. Summary of the Invention

[0010] This invention provides a multi-parameter testing device and a water injection and oil production testing method that are universal for injection and production wells. It solves the problems that under complex well conditions, the measurement of flow rate and water cut of downhole fluids is mostly qualitative rather than quantitative, and the accuracy and precision cannot be guaranteed, as well as the incompatibility of existing water injection and oil production testing devices.

[0011] To achieve the above objectives, the present invention provides the following technical solution: A multi-parameter testing device for injection and production wells includes an upper connector, a middle connector, and a lower connector arranged sequentially. An upper flow pipe and a parameter testing component are provided between the middle connector and the upper connector. A lower flow pipe and a control component are provided between the middle connector and the lower connector. The middle connector has a main flow channel and a secondary flow channel inside. The main flow channel is connected to the upper flow pipe and the lower flow pipe. The parameter testing component is located above the secondary flow channel, and the control component is located below the secondary flow channel. The middle connector has a first inlet / outlet port communicating with the secondary flow channel. A second inlet / outlet port is provided between the main flow channel and the secondary flow channel. The secondary flow channel has a multi-stage conductivity short section testing channel inside. The upper connector is connected to an upper communication interface with a bus inlet. The lower connector is connected to a lower communication interface with a bus outlet.

[0012] Preferably, the parameter testing assembly includes an ultrasonic flow section, a multi-level conductivity multi-parameter section, a differential pressure sensing section, an internal pressure sensor, and an external pressure sensor, all of which are fixed to the upper end face of the connector.

[0013] Preferably, the control device includes a data control board, a main control circuit, and a well switch, all of which are fixed to the lower end face of the intermediate connector.

[0014] Preferably, a well-switching device sealing piston is provided at the first inlet / outlet, and the well-switching device sealing piston is communicatively connected to the well-switching device.

[0015] Preferably, the intermediate connector is provided with a pressure tapping hole.

[0016] Preferably, the upper flow pipe and parameter testing component are provided with an upper outer protective tube, and the upper outer protective tube connects and tightens the upper connector and the middle connector through positive and negative threads. The lower flow pipe and control component are provided with a lower outer protective tube, and the lower outer protective tube connects and tightens the lower connector and the middle connector through positive and negative threads.

[0017] Preferably, one end of the upper flow tube is inserted into the upper end face of the middle connector, and the other end is inserted into the inner cavity of the upper connector; one end of the lower flow tube is inserted into the lower end face of the middle connector, and the other end is connected to the lower connector via a plug-in connection.

[0018] Preferably, a sandproof cover is provided on the top of the lower flow pipe, and the sandproof cover is provided on the circumferential surface of the intermediate joint.

[0019] A water injection testing method for a universal multi-parameter testing device for injection and production wells, comprising: The testing device is lowered to a preset formation depth and communicates with the ground PC via cable. The testing device detects formation pressure data for each layer and transmits it to the ground PC. Based on the pressure test results, a water injection plan is arranged. Simultaneously with injection, the ground PC controls the well switch of the testing device to open, and the sealing piston moves backward. The injected fluid enters the secondary flow channel through the second inlet and outlet on the main channel, and finally flows to the sealing piston of the well switch, passing through the first inlet and outlet of the intermediate connector and entering the formation. The ground PC monitors the flow rate and injection pressure of the injected fluid in real time according to the parameter testing components, and accumulates the injection volume of the current formation to achieve real-time control of the injection layer and injection volume.

[0020] An oil production testing method using a universal multi-parameter testing device for injection and production wells, comprising: The testing device is lowered to a preset formation depth and communicates with the surface PC via cable. The testing device transmits the formation pressure data of each segment to the surface PC. Based on the pressure test results, an oil production plan is arranged. By controlling the wellhead of the testing device to execute the opening command, the sealing piston moves backward, opening the current formation. At this time, the produced fluid in the formation enters the instrument through the inlet and outlet of the intermediate connector, flows from the flow channel to the multi-stage conductivity testing sub-channel, flows into the main channel through the inlet and outlet of the main channel, mixes with the produced fluid of other layers, and is collected to the surface. While the produced fluid flows in the testing channel of the testing device, the data measured by the parameter testing component is displayed on the surface PC as the temperature, flow rate, water content, and formation pressure of the produced fluid. Based on the above data, the quality of the produced fluid in the current harvesting layer is evaluated. Then, layer-by-layer testing is performed to obtain the production rate and quality of the entire well formation, thereby selecting the formation for harvesting.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a multi-parameter testing device that is universal for injection and production wells, which consists of an upper connector, a lower connector, a middle connector, a parameter testing component and a control component. Each component adopts a highly integrated modular design and has the same interface as the main instrument. It can be used individually or in full sections according to the required parameters and well conditions. It can realize parameter measurement and also perform unified testing on the accuracy and precision of various testing methods, which can meet the needs of production testing as well as scientific research testing. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of a multi-parameter testing device for injection and production wells according to the present invention; Figure 2This is a structural diagram of a universal multi-parameter testing device for injection and production wells of the present invention, with the upper and lower outer casings removed. Figure 3 This is a cross-sectional view of a multi-parameter testing device for injection and production wells according to the present invention; Figure 4 This invention provides a multi-parameter testing device for injection and production wells, illustrating the flow direction of fluid in an injection well. Figure 5 This invention provides a multi-parameter testing device for injection and production wells, which is used to test the direction of fluid flow in oil wells. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] A multi-parameter testing device for injection and production wells includes an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are arranged between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are arranged between the middle connector 5 and the lower connector 8. The middle connector 5 has a main flow channel 26 and a secondary flow channel 27 inside. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing component is located above the secondary flow channel 27, and the control component is located below the secondary flow channel 27. The middle connector 5 has a first inlet / outlet port 6 communicating with the secondary flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the secondary flow channel 27. The secondary flow channel 27 has a multi-stage conductivity short section testing flow channel 25 inside. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0031] Each component adopts a highly integrated modular design and has the same interface as the main instrument. It can be used individually as a short section or as a full short section according to the required parameters and well conditions. This can realize parameter measurement and unified testing of the accuracy and precision of various test methods, which can meet both production testing needs and scientific research testing needs.

[0032] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0033] The parameter testing assembly includes an ultrasonic flow section 12, a multi-level conductivity multi-parameter section 13, a differential pressure sensing section 14, an internal pressure sensor 15, and an external pressure sensor 16. The ultrasonic flow section 12, the multi-level conductivity multi-parameter section 13, the differential pressure sensing section 14, the internal pressure sensor 15, and the external pressure sensor 16 are all fixed on the upper end face of the intermediate connector 5.

[0034] By integrating an ultrasonic flow meter 12, a multi-stage conductivity multi-parameter meter 13, a differential pressure sensing meter 14, an internal pressure sensor 15, and an external pressure sensor 16 onto the upper end face of the connector, comprehensive and real-time testing of multiple parameters in injection and production wells is achieved. This integrated design not only improves testing efficiency but also reduces equipment complexity and installation difficulty, making the testing device more compact and reliable.

[0035] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0036] The control device includes a data control board 18, a main control circuit 19, and a well switch 20, all of which are fixed to the lower end face of the intermediate connector 5.

[0037] The integration of the data control board 18, main control circuit 19, and well switch 20 on the lower end face of the intermediate connector provides the testing device with powerful data processing and control capabilities. This design enables the testing device to automatically collect and process data, and control the well switch as needed, achieving intelligent management and improving the accuracy and efficiency of testing.

[0038] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0039] A well-switching device sealing piston 28 is provided at the first inlet / outlet 6, and the well-switching device sealing piston 28 is communicatively connected to the well-switching device 20.

[0040] A wellhead switch sealing piston 28 is installed at the first inlet / outlet and is communicatively connected to the wellhead switch 20, ensuring that the testing device can accurately and quickly control the wellhead opening and closing when needed. This not only improves the safety of the test but also facilitates remote operation.

[0041] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0042] The intermediate connector 5 is provided with a pressure tapping hole 4.

[0043] A pressure tap 4 is provided on the intermediate connector 5, offering a direct way for the testing device to acquire well pressure data. This helps to monitor well pressure changes more accurately, providing a basis for production decisions, while also improving the practicality and accuracy of the testing device.

[0044] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0045] The upper flow pipe 11 and the parameter testing component are provided with an upper outer protective tube 3. The upper outer protective tube 3 connects and tightens the upper connector 1 and the middle connector 5 through positive and negative threads. The lower flow pipe 21 and the control component are provided with a lower outer protective tube 7. The lower outer protective tube 7 connects and tightens the lower connector 8 and the middle connector 5 through positive and negative threads.

[0046] The upper flow pipe 11, parameter testing components, lower flow pipe 21, and control components are protected by the upper outer protective tube 3 and the lower outer protective tube 7, and are tightened by positive and negative threaded connections, which enhances the pressure resistance and stability of the testing device. This design allows the testing device to better adapt to harsh downhole environments and extends its service life.

[0047] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0048] One end of the upper flow tube 11 is inserted into the upper end face of the middle connector 5, and the other end is inserted into the inner cavity of the upper connector 1. One end of the lower flow tube 21 is inserted into the lower end face of the middle connector 5, and the other end is connected to the lower connector 8 through a plug-in connection.

[0049] This design ensures smooth and sealed internal flow channels in the testing device, preventing fluid leakage and the entry of external impurities, thus improving the accuracy and reliability of the test.

[0050] Another embodiment of the present invention provides a multi-parameter testing device for injection and production wells, comprising an upper connector 1, a middle connector 5, and a lower connector 8 arranged sequentially. An upper flow pipe 11 and a parameter testing component are disposed between the middle connector 5 and the upper connector 1. A lower flow pipe 21 and a control component are disposed between the middle connector 5 and the lower connector 8. A main flow channel 26 and a secondary flow channel 27 are disposed inside the middle connector 5. The main flow channel 26 is connected to the upper flow pipe 11 and the lower flow pipe 21. The parameter testing is located on the secondary flow channel 27. The control component is located below the flow channel 27. The middle connector 5 has a first inlet / outlet port 6 connected to the flow channel 27. A second inlet / outlet port 23 is provided between the main flow channel 26 and the flow channel 27. The flow channel 27 is provided with a multi-stage conductivity short section test flow channel 25. The upper connector 1 is connected to an upper communication interface 2, which is connected to a bus inlet 10. The lower connector 8 is connected to a lower communication interface 9, which is connected to a bus outlet 22.

[0051] The top of the lower flow pipe 21 is provided with a sandproof cover plate 17, which is located on the lower end face of the intermediate connector 5.

[0052] This effectively prevents impurities such as sand and gravel from entering the testing device. This helps protect the testing and control components from damage, improving the durability and stability of the testing equipment. It also reduces testing errors caused by interference from impurities.

[0053] Another embodiment of the present invention provides a multi-parameter testing device applicable to injection and production wells, including... Connector 5 in the testing device divides the testing device into upper and lower sections.

[0054] The ultrasonic flow section 12, the multi-stage conductivity multi-parameter section 13, the differential pressure sensing section 14, the internal pressure sensor 15, and the external pressure sensor 16 are connected to the upper end face of the intermediate connector via threads. One end of the upper flow tube 11 is inserted into the upper end face of the intermediate connector 5, and the other end is inserted into the inner cavity of the upper connector 1. The upper outer protective tube 3 is connected and tightened to the upper connector 1 and the intermediate connector 5 via positive and negative threads, restricting the position of the upper flow tube 11. The bus inlet 10 and the upper connector communication interface 2 are installed on the upper connector 1 via threads, thus forming the upper section of the test device.

[0055] The data control board (18) and main control circuit board (19) are fixed to the lower end face of the intermediate connector 5 with screws. The switch well device (20) is installed on the lower end face of the intermediate connector 5 with threads. One end of the lower flow pipe (21) is inserted into the lower end face of the intermediate connector 5, and the other end is connected to the lower connector 8 through a plug-in connector. The lower outer protective tube (7) is connected and tightened to the intermediate connector 5 through positive and negative threads, restricting the position of the lower flow pipe (21). The bus outlet (22) and the lower connector communication interface (9) are installed on the lower connector 8 with threads. Characteristics of communication traces on the test device: The ground PC signal and current are connected to the upper connector communication interface 2 of the test device via a cable to power the test device. The signal and current enter through the upper connector communication interface 2 and are divided into two paths through the bus interface 10. One path is led to other test sections through the control circuit in the multi-level conductance multi-parameter short section, providing power to other test sections and realizing information transmission at the same time. The other path is led directly to the lower connector bus outlet 22 through the wire hole provided on the middle connector 5, and directly introduced to the next layer through the lower connector communication interface 9.

[0056] Another embodiment of the present invention provides a water injection testing method for a multi-parameter testing device applicable to injection and production wells, comprising: The testing device is lowered to a preset formation depth and communicates with the ground PC via cable. The testing device will detect the formation pressure data of each layer and transmit it to the ground PC. The water injection plan is arranged based on the pressure test results. At the same time as the injection, the ground PC controls the well switch (20) of the testing device to open and the sealing piston (28) to move backward. The injected fluid enters the flow channel (27) through the second inlet and outlet (23) provided on the main channel 26 and finally flows to the sealing piston (28) of the well switch and enters the formation through the first inlet and outlet (6) of the intermediate connector. The ground PC monitors the flow rate and injection pressure of the injected fluid in real time according to the parameter testing components and accumulates the injection volume of the current formation to realize the real-time control of the injection layer and the injection volume.

[0057] The injection plan can be dynamically adjusted based on formation pressure and injection pressure. If the wellhead switch of the testing device is in the closed state, the current formation will be sealed.

[0058] Another embodiment of the present invention provides an oil production testing method using a multi-parameter testing device applicable to both injection and production wells, comprising: The testing device is lowered to the preset formation depth and communicates with the ground PC via cable. The testing device will detect the formation pressure data of each segment and transmit it to the ground PC. The oil production plan is arranged based on the pressure test results. By controlling the well switch (20) of the testing device to execute the opening command, the sealing piston (28) moves backward to open the current formation. At this time, the fluid produced in the formation enters the instrument through the inlet / outlet port (6) of the intermediate connector, flows through the flow channel (27) to the multi-stage conductivity test sub test channel (25), and enters and exits through the main channel. The liquid inlet (23) flows into the main channel (26), mixes with the produced fluid from other layers, and is collected to the surface. When the produced fluid flows in the test channel of the test device, the data measured by the parameter test component is displayed on the surface PC as the temperature, flow rate, water content and formation pressure of the produced fluid. Based on the above data, the quality of the produced fluid of the current harvested layer is evaluated, and then layer-by-layer testing is carried out to obtain the production and quality of the entire well formation. In this way, high-quality formations with high formation pressure and low water content are selected for harvesting, and formations with high water content and low pressure are blocked.

[0059] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. A multi-parameter testing device applicable to both injection and production wells, characterized in that, The device includes an upper connector (1), a middle connector (5), and a lower connector (8) arranged sequentially. An upper flow pipe (11) and a parameter testing component are arranged between the middle connector (5) and the upper connector (1). A lower flow pipe (21) and a control component are arranged between the middle connector (5) and the lower connector (8). The middle connector (5) has a main flow channel (26) and a secondary flow channel (27) inside. The main flow channel (26) is connected to the upper flow pipe (11) and the lower flow pipe (21). The parameter testing component is located above the secondary flow channel (27), and the control component is located above the secondary flow channel (28). 27) Below, the middle connector (5) is provided with a first inlet / outlet port (6) connected to the flow channel (27), and a second inlet / outlet port (23) is provided between the main flow channel (26) and the flow channel (27). The flow channel (27) is provided with a multi-stage conductivity short section test flow channel (25). The upper connector (1) is connected to an upper communication interface (2), and the upper communication interface (2) is connected to a bus inlet (10). The lower connector (8) is connected to a lower communication interface (9), and the lower communication interface (9) is connected to a bus outlet (22).

2. The multi-parameter testing device for injection and production wells according to claim 1, characterized in that, The parameter testing assembly includes an ultrasonic flow section (12), a multi-level conductivity multi-parameter section (13), a differential pressure sensing section (14), an internal pressure sensor (15), and an external pressure sensor (16). The ultrasonic flow section (12), the multi-level conductivity multi-parameter section (13), the differential pressure sensing section (14), the internal pressure sensor (15), and the external pressure sensor (16) are all fixed on the upper end face of the intermediate connector (5).

3. The multi-parameter testing device for injection and production wells according to claim 1, characterized in that, The control device includes a data control board (18), a main control circuit (19), and a well switch (20), all of which are fixed on the lower end face of the intermediate connector (5).

4. The multi-parameter testing device for injection and production wells according to claim 3, characterized in that, A well-switching device sealing piston (28) is provided at the first inlet / outlet (6), and the well-switching device sealing piston (28) is communicatively connected to the well-switching device (20).

5. A multi-parameter testing device for injection and production wells according to claim 1, characterized in that, The intermediate connector (5) is provided with a pressure tapping hole (4).

6. The multi-parameter testing device for injection and production wells according to claim 1, characterized in that, The upper flow pipe (11) and the parameter testing component are provided with an upper outer protective tube (3). The upper outer protective tube (3) connects and tightens the upper connector (1) and the middle connector (5) through positive and negative threads. The lower flow pipe (21) and the control component are provided with a lower outer protective tube (7). The lower outer protective tube (7) connects and tightens the lower connector (8) and the middle connector (5) through positive and negative threads.

7. A multi-parameter testing device for injection and production wells according to claim 1, characterized in that, One end of the upper flow pipe (11) is inserted into the upper end face of the middle connector (5), and the other end is inserted into the inner cavity of the upper connector (1). One end of the lower flow pipe (21) is inserted into the lower end face of the middle connector (5), and the other end is connected to the lower connector (8) through a plug-in connection.

8. A multi-parameter testing device for injection and production wells according to claim 1, characterized in that, The top of the lower flow pipe (21) is provided with a sandproof cover plate (17), which is located on the circumferential surface of the intermediate connector (5).

9. A water injection testing method for a universal multi-parameter testing device for injection and production wells, characterized in that, include: The testing device is lowered to a preset formation depth and communicates with the ground PC via cable. The testing device will detect the formation pressure data of each layer and transmit it to the ground PC. The water injection plan is arranged based on the pressure test results. At the same time as the injection, the ground PC controls the well switch (20) of the testing device to open and the sealing piston (28) to move backward. The injected fluid enters the flow channel (27) through the second inlet and outlet (23) on the main channel (26) and finally flows to the sealing piston (28) of the well switch and enters the formation through the first inlet and outlet (6) of the intermediate connector. The ground PC monitors the flow rate and injection pressure of the injected fluid in real time according to the parameter testing components and accumulates the injection volume of the current formation to realize the real-time control of the injection layer and the injection volume.

10. A method for oil production testing using a multi-parameter testing device applicable to both injection and production wells, characterized in that, include: The testing device is lowered to the preset formation depth and communicates with the ground PC via cable. The testing device transmits the formation pressure data of each layer to the ground PC. The oil production plan is arranged based on the pressure test results. The well switch (20) of the testing device is controlled to execute the opening command. The sealing piston (28) moves backward to open the current formation. At this time, the produced fluid in the formation enters the instrument through the inlet / outlet port (6) of the intermediate connector. It flows from the flow channel (27) to the multi-stage conductivity test section test channel (25), and then flows into the main channel (26) through the inlet / outlet port (23) of the main channel. It mixes with the produced fluid of other layers and is collected to the surface. When the produced fluid flows in the test channel of the testing device, the data measured by the parameter testing component is displayed on the ground PC as the temperature, flow rate, water content and formation pressure of the produced fluid. Based on the above data, the quality of the produced fluid of the current harvesting layer is evaluated. Then, layer-by-layer testing is carried out to obtain the production and quality of the entire well formation, thereby selecting the formation for harvesting.

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