Monitoring system for developing high pour-point oil based on electric heating assisted hot water flooding

Abstract

The invention provides a monitoring system for developing high pour-point oil based on electric heating assisted hot water flooding, and the system comprises an injection well temperature real-time monitoring subsystem which is arranged in an injection well and is used for monitoring the temperature of an injection medium in the injection well in real time, the injection medium in the injection well is heated according to the temperature of the injection medium so as to heat the high pour point oil in the oil layer where the injection well is located; and the production well dynamic parameter real-time monitoring subsystem is arranged in the production well and used for monitoring temperature parameters and pressure parameters of fluid in the production well, and the oil layers between the production well and the injection well are communicated. The temperature of the injection medium in the injection well can be monitored in real time, the injection medium in the injection well can be heated, and the temperature parameter and the pressure parameter of the fluid in the production well can be monitored.

Description

Technical Field

[0001] The invention belongs to the technical field of hot water drive development control, and in particular relates to a monitoring system for high-condensate oil developed by hot water drive assisted by electric heating. Background Art

[0002] During the development of high-powder-density oil in oil and gas fields, the development effect of high-powder-density oil will be affected by the downhole temperature because of its high wax content, high freezing point, high wax precipitation point and temperature sensitivity. In addition, during the production of high-powder-density oil, it is impossible to monitor the parameters corresponding to the high-powder-density oil in the production well in real time. Therefore, a system is needed that can effectively improve the production efficiency of high-powder-density oil and monitor the parameters corresponding to high-powder-density oil in real time. Summary of the invention

[0003] The purpose of the present invention is to provide a monitoring system for developing high-condensate oil based on electric heating assisted hot water drive, which can monitor the temperature of the injected medium in the injection well in real time, and monitor the dynamic temperature parameters and dynamic pressure parameters corresponding to the fluid in the production well in real time.

[0004] Specifically, the present invention adopts the following technical solutions:

[0005] The present invention provides a monitoring system for developing high-condensate oil based on electric heating assisted hot water drive, characterized in that the system comprises: an injection well temperature real-time monitoring subsystem, the injection well temperature real-time monitoring subsystem is arranged in the injection well, and is used to monitor the injection medium temperature in the injection well in real time, and heat the injection medium in the injection well according to the injection medium temperature to heat the high-condensate oil in the oil layer where the injection well is located; a production well dynamic parameter real-time monitoring subsystem, the production well dynamic parameter real-time monitoring subsystem is arranged in the production well, and is used to monitor the temperature parameters and pressure parameters of the fluid in the production well, and the oil layer between the production well and the injection well is connected.

[0006] Furthermore, the injection well temperature real-time monitoring subsystem includes a temperature measuring optical fiber and a perforated oil pipe, wherein the temperature measuring optical fiber is arranged on the outer wall of the perforated oil pipe, and the temperature measuring optical fiber is used to obtain the temperature of the injected medium in real time, wherein the perforated oil pipe is placed in the oil layer.

[0007] Furthermore, the injection well temperature real-time monitoring subsystem includes an electric heater and a ground high-pressure power regulating device, the electric heater is used to heat the injection medium, and the ground high-pressure power regulating device is used to adjust the heating power of the electric heater in real time through a heating cable.

[0008] Furthermore, the real-time monitoring subsystem for dynamic parameters of the production well includes a ground control platform and an oil casing annulus telemeter. The ground control platform receives the temperature parameters and pressure parameters of the fluid in the production well transmitted back by the oil casing annulus telemeter via a cable to monitor the temperature and pressure of the fluid in the production well in real time.

[0009] Furthermore, the real-time monitoring subsystem for dynamic parameters of the production well includes a temperature and pressure monitoring short circuit, which connects adjacent oil pipes in the production well. The temperature and pressure monitoring short circuit is used to collect temperature parameters and pressure parameters corresponding to the fluid in the production well, and send the temperature parameters and pressure parameters to the casing annulus telemeter.

[0010] Furthermore, the oil casing annulus telemeter includes a cable head, an instrument insulation shell, an intelligent telemetry module, an electromagnetic transmitting coil and a guide cone. The intelligent telemetry module is arranged inside the oil casing annulus telemeter. The intelligent telemetry module is used to send control instructions to the temperature and pressure monitoring short circuit to collect temperature parameters and pressure parameters corresponding to the fluid in the production well, and receive the temperature parameters and pressure parameters sent by the temperature and pressure monitoring short circuit.

[0011] Furthermore, the temperature and pressure monitoring short circuit includes an upper connector, a high-temperature battery pack, an intelligent test module, an electromagnetic receiving coil, a pressure sensor, a platinum resistance temperature sensor, an instrument insulation shell, an inner annulus and a lower connector. The pressure sensor and the platinum resistance temperature sensor are arranged on the inner annulus wall of the temperature and pressure monitoring short circuit. The pressure sensor is used to collect the pressure parameters of the fluid in the production well in real time, and the platinum resistance temperature sensor is used to collect the temperature parameters of the fluid in the production well in real time.

[0012] Furthermore, the real-time monitoring subsystem for dynamic parameters of production wells includes an eccentric test wellhead, which is arranged on one side of the real-time monitoring subsystem for dynamic parameters of production wells, and is used to place the casing annulus telemeter in the production well.

[0013] Furthermore, the real-time monitoring subsystem for dynamic parameters of the production well includes a pump and a sucker rod, wherein the pump is used to extract fluid from the oil layer at the wellbore of the production well; the sucker rod is placed above the pump, and the sucker rod is used to reciprocate in the oil pipe in the production well to lift the fluid in the oil pipe.

[0014] Furthermore, the monitoring system for developing high-condensate oil based on electric heating assisted hot water drive also includes a power supply device, which is used to supply power to the devices in the monitoring system for developing high-condensate oil based on electric heating assisted hot water drive.

[0015] It can be seen from the above scheme that the present invention has at least the following advantages and positive effects:

[0016] First, according to the injection well temperature real-time monitoring subsystem, the injection medium temperature in the injection well is monitored in real time, and the injection medium in the injection well is heated according to the injection medium temperature to heat the high pour point oil in the oil layer where the injection well is located.

[0017] Then, the temperature parameter and pressure parameter of the fluid in the production well are monitored according to the real-time monitoring subsystem of the production well dynamic parameters, wherein the production well and the injection well are connected to the oil layer.

[0018] The monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding of the present application can monitor the injection medium temperature in the injection well in real time, heat the injection medium of the injection well, and can monitor the temperature parameters and pressure parameters of the fluid in the production well in real time. At the same time, according to the monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding, a basis can be provided for adjusting the electric heating power of the water injection well.

[0019] In summary, the present invention can monitor and control the temperature of the injected medium in real time, and can also monitor and analyze the dynamic temperature parameters and dynamic pressure parameters in the production well in real time. In addition, based on the high-condensate oil electric heating assisted hot water flooding development monitoring system, the oil displacement efficiency of high-condensate oil can be improved, and the development effect of the oil field can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 The structural schematic diagram of the monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding of the present invention is shown;

[0022] Figure 2 The circuit diagram of the real-time monitoring subsystem for dynamic parameters of production wells of the present invention is shown;

[0023] Figure 3 The schematic diagram of the structure of the temperature and pressure short circuit and the oil casing annulus telemeter of the present invention is shown.

[0024] The following are the descriptions of the reference numerals:

[0025] 100—Electrical heating auxiliary hot water 101—Injection well temperature real-time monitoring 102—Production well dynamic parameters Monitoring system for flooding high condensate oil Measurement subsystem Real-time monitoring subsystem 1—Surface high-voltage power regulating device 2—Heating cable 3—Wellhead

[0026] 4—Oil pipe valve 5—Injection medium 6—Insulated oil pipe

[0027] 7—Temperature measuring optical fiber 8—Electric heater 9—Cable packer

[0028] 10 - drilling oil pipe 11 - oil layer 12 - guide cone

[0029] 13—Oil pipe 14—Temperature and pressure monitoring short circuit 14-1—Upper connector

[0030] 14-2—High temperature battery pack 14-3—Intelligent test module 14-4—Electromagnetic receiving coil

[0031] 14-5—Pressure sensor 14-6—Platinum resistance temperature sensor 14-7—Insulation housing of the instrument

[0032] 14-8—Inner annulus 14-9—Lower connector 15—Casing annulus telemeter

[0033] 15-1—Cable head 15-2—Insulation shell of instrument 15-3—Intelligent telemetry module

[0034] 15-4—Electromagnetic transmitting coil 15-5—Guide cone 16—Pump

[0035] 17 - Sucker rod 18 - Cable 19 - Casing

[0036] 20—eccentric test wellhead 21—engineering vehicle 22—ground control platform DETAILED DESCRIPTION

[0037] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0038] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 a limitation on the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Reference Figure 1 , showing a schematic structural diagram of a monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding according to the present invention.

[0041] The present invention provides a monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding. The monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding is used to monitor the temperature of the injection medium in the injection well in real time, heat the injection medium in the injection well, and monitor the temperature parameters and pressure parameters of the fluid in the production well.

[0042] Specifically, the monitoring system 100 for developing high-condensate oil based on electric heating assisted hot water flooding includes an injection well temperature real-time monitoring subsystem 101 and a production well dynamic parameter real-time monitoring subsystem 102. The injection well temperature real-time monitoring subsystem 101 is arranged in the injection well, and is used to monitor the injection medium temperature in the injection well in real time, and heat the injection medium 5 in the injection well according to the injection medium temperature, so as to heat the high-condensate oil in the oil layer 11 where the injection well is located. The production well dynamic parameter real-time monitoring subsystem 102 is arranged in the production well, and is used to monitor the temperature parameters and pressure parameters of the fluid in the production well, wherein the production well and the injection well are connected.

[0043] In the process of high-pour point oil development, since high-pour point oil products have the characteristics of high wax content, high freezing point, high wax precipitation point and temperature sensitivity, the temperature of the oil layer plays a decisive role in the development effect of high-pour point oil. In the existing technology, high-pour point oil layers are generally developed by injecting cold water or conventional hot water flooding, which causes the temperature of the injected medium in the injection well to drop, so that the temperature of the injected medium is lower than the wax precipitation temperature of the oil layer, causing cold damage to the oil layer 11, thereby reducing the oil recovery efficiency and greatly reducing the development effect of the oil layer 11.

[0044] Therefore, in the present application, the injection medium 5 in the injection well is heated by the injection well temperature real-time monitoring subsystem 101, so that the high-condensate oil in the oil layer 11 is heated by the injection medium 5. At the same time, in the process of heating the high-condensate oil, the injection medium temperature in the injection well is monitored in real time to control the heating temperature of the injection medium 5, so as to ensure the effective development of the high-condensate oil in the oil layer 11. Then, the fluid flowing into the wellbore of the production well is collected by the production well dynamic parameter real-time monitoring subsystem 102. In the process of collection, the temperature parameters and pressure parameters of the fluid in the production well are monitored, so that the production parameters of the fluid can be analyzed.

[0045] Furthermore, the injection well temperature real-time monitoring subsystem 101 includes a temperature measuring optical fiber 7 and a perforated oil pipe 10 , wherein the temperature measuring optical fiber 7 is arranged on the outer wall of the perforated oil pipe 10 , and the temperature measuring optical fiber 7 is used to obtain the temperature of the injected medium in real time, wherein the perforated oil pipe 10 is placed in the oil layer 11 .

[0046] In this embodiment, in the process of monitoring the temperature of the injection medium in the injection well through the temperature measuring optical fiber 7, the injection medium 5 is injected from the wellhead 3 of the injection well temperature real-time monitoring subsystem 101, and directly enters the oil layer 11 through the perforated oil pipe 10 to perform hot water flooding development of high-condensate oil. Among them, the temperature measuring optical fiber 7 is arranged on the outer wall of the perforated oil pipe 10. The heated injection medium 5 contacts the temperature measuring optical fiber 7 through the outer wall of the perforated oil pipe 10, so as to realize the real-time monitoring of the injection medium temperature.

[0047] Furthermore, the injection well temperature real-time monitoring subsystem 101 includes an electric heater 8 and a ground high-pressure power regulating device 1, wherein the electric heater 8 is used to heat the injection medium 5, and the ground high-pressure power regulating device 1 is used to adjust the heating power of the electric heater 8 in real time through the heating cable 2.

[0048] In this embodiment, the ground high-voltage power regulating device 1 is connected to the electric heater 8 through the heating cable 2. The ground high-voltage power regulating device 1 controls the heating power of the electric heater 8 by controlling its own output power. Then, the ground high-voltage power regulating device 1 can dynamically adjust its own output power according to the injection medium temperature fed back by the temperature measuring optical fiber 7, thereby controlling the injection medium temperature in the injection well to be at an ideal temperature, thereby improving the oil displacement efficiency of the oil layer 11 and improving the development effect of the oil layer 11.

[0049] The injection well temperature real-time monitoring subsystem 101 includes a surface high-pressure power regulating device 1, a heating cable 2, a wellhead 3, an insulated oil pipe 6, a temperature measuring optical fiber 7, an electric heater 8, a cable packer 9, a perforated oil pipe 10 and a guide cone 12. The surface high-pressure power regulating device 1 is connected to the electric heater 8 through the heating cable 2, and can achieve the function of electric heating water injection temperature increase.

[0050] Furthermore, the real-time monitoring subsystem 102 for dynamic parameters of production wells includes a ground control platform 22 and an oil casing annulus telemeter 15. The ground control platform 22 receives the temperature parameters and pressure parameters of the fluid in the production well transmitted by the oil casing annulus telemeter 15 via a cable 18 to monitor the temperature and pressure of the fluid in the production well in real time.

[0051] In this embodiment, the ground control platform 22 and the oil casing annulus telemeter 15 are connected by a cable 18. The oil casing annulus telemeter 15 includes a cable head 15-1, an instrument insulation shell 15-2, an intelligent telemetry module 15-3, an electromagnetic transmitting coil 15-4 and a guide cone 15-5. Figure 1 The shape shown can improve the convenience of movement of the casing annulus telemeter 15 and improve the efficiency of temperature parameters and pressure parameters.

[0052] The ground control platform 22 can control the oil-casing annulus telemeter 15 to send control instructions for collecting temperature parameters and pressure parameters corresponding to the fluid in the production well to the temperature and pressure monitoring short circuit 14 by sending control instructions to the oil-casing annulus telemeter 15, and can receive the temperature parameters and pressure parameters of the fluid in the production well sent back by the oil-casing annulus telemeter 15 to monitor the temperature and pressure of the fluid in the production well in real time.

[0053] For example, refer to Figure 2 , showing a circuit diagram of the real-time monitoring subsystem for dynamic parameters of production wells of the present invention. The ground control platform 22 completes the sending of instructions and the receiving of data through a computer, a single-chip microcomputer, an encoder / decoder, and a signal transceiver, and the signal is transmitted to the intelligent telemetry module 15-3 of the oil casing annulus telemeter through a cable.

[0054] In addition, since the real-time monitoring subsystem 102 for dynamic parameters of production wells includes the oil pipe 13, the temperature and pressure monitoring short circuit 14, the oil casing annulus telemeter 15, the pump 16, the sucker rod 17, the cable 18, the casing 19, the eccentric test wellhead 20, the engineering vehicle 21 and the ground control platform 22, the movement of the oil casing annulus telemeter 15 can be controlled by controlling the movement of the engineering vehicle 21, so that the temperature and pressure monitoring short circuit 14 at different depths can be controlled to collect the temperature parameters and pressure parameters corresponding to the fluid at different depths.

[0055] Furthermore, the real-time monitoring subsystem 102 of the dynamic parameters of the production well includes a temperature and pressure monitoring short circuit 14, which is connected to the adjacent oil pipes 13 in the production well. The temperature and pressure monitoring short circuit 14 is used to collect the temperature parameters and pressure parameters corresponding to the fluid in the production well, and send the temperature parameters and pressure parameters to the casing annulus telemeter 15.

[0056] In this embodiment, the temperature and pressure monitoring short circuit 14 is connected to the adjacent oil pipes 13 in the production well. Based on the control instructions for collecting the temperature parameters and pressure parameters corresponding to the fluid in the production well sent from the oil casing annulus telemeter 15, the temperature parameters and pressure parameters corresponding to the fluid in the production well are collected. Then, the temperature parameters and pressure parameters can be sent to the oil casing annulus telemeter 15 according to the data transmission instructions sent by the oil casing annulus telemeter 15.

[0057] Furthermore, the casing annulus telemeter 15 includes a cable head 15-1, an instrument insulation shell 15-2, an intelligent telemetering module 15-3, an electromagnetic transmitting coil 15-4 and a guide cone. The intelligent telemetering module 15-3 is arranged inside the casing annulus telemeter 15. The intelligent telemetering module 15-3 is used to send control instructions for collecting temperature parameters and pressure parameters corresponding to the fluid in the production well to the temperature and pressure monitoring short circuit 14, and receive the temperature parameters and pressure parameters sent by the temperature and pressure monitoring short circuit 14.

[0058] In this embodiment, refer to Figure 3 , showing a schematic diagram of the structure of the temperature and pressure short circuit and the oil casing annulus telemeter of the present invention. The intelligent telemetry module 15-3 is arranged inside the oil casing annulus telemeter 15. First, the intelligent telemetry module 15-3 receives the control instruction from the ground control platform 22, and controls the intelligent telemetry module 15-3 to send the control instruction of collecting the temperature parameters and pressure parameters corresponding to the fluid in the production well to the intelligent test module 14-3. After the intelligent test module 14-3 completes the collection, the intelligent telemetry module 15-3 sends a data transmission instruction to the intelligent test module 14-3, and controls the intelligent test module 14-3 to send the collected temperature parameters and pressure parameters to the intelligent telemetry module 15-3. Then, the temperature parameters and pressure parameters stored in the intelligent telemetry module 15-3 are transmitted back to the ground control platform 22 through the cable 18, so as to monitor the temperature parameters and pressure parameters corresponding to the fluid in the production well in real time, and realize long-distance data transmission.

[0059] For example, continue to refer to Figure 2 The intelligent telemetry module 15-3 realizes the functions of the intelligent test module 14-3, wireless charging, receiving data signals and transmitting them back to the ground control platform 22 through a signal transceiver, an encoder / decoder, a single-chip microcomputer, an electromagnetic transmitting coil, an encoder / decoder, a modulator / demodulator, a signal transceiver, etc.

[0060] Furthermore, the temperature and pressure monitoring short circuit 14 includes an upper connector 14-1, a high-temperature battery pack 14-2, an intelligent test module 14-3, an electromagnetic receiving coil 14-4, a pressure sensor 14-5, a platinum resistance temperature sensor 14-6, an instrument insulation shell 14-7, an inner annulus 14-8 and a lower connector 14-9. The pressure sensor 14-5 and the platinum resistance temperature sensor 14-6 are arranged on the wall of the inner annulus 14-8 in the temperature and pressure monitoring short circuit 14. The pressure sensor 14-5 is used to collect the pressure parameters of the fluid in the production well in real time, and the platinum resistance temperature sensor 14-6 is used to collect the temperature parameters of the fluid in the production well in real time.

[0061] In this embodiment, the intelligent test module 14-3 is arranged inside the temperature and pressure monitoring short circuit 14. After the intelligent test module 14-3 receives the control instruction for collecting the temperature parameters and pressure parameters corresponding to the fluid in the production well from the intelligent telemetry module 15-3, the pressure sensor 14-5 and the platinum resistance temperature sensor 14-6 inside the intelligent test module 14-3 are controlled to collect, so as to collect the temperature parameters and pressure parameters corresponding to the fluid at the current depth of the production well in real time. Then, after the intelligent test module 14-3 receives the data transmission instruction from the intelligent telemetry module 15-3, the collected temperature parameters and pressure parameters are sent to the intelligent telemetry module 15-3, so as to realize the real-time collection and real-time transmission of the temperature parameters and pressure parameters. At the same time, since the pressure sensor 14-5 and the platinum resistance temperature sensor 14-6 are flatly placed on the wall of the inner annulus 14-8, the reciprocating motion of the sucker rod 17 during the lifting production of the fluid in the oil pipe 11 can be guaranteed, so as to realize the direct and effective monitoring of the temperature parameters and pressure parameters of the fluid in the oil pipe 11.

[0062] For example, continue to refer to Figure 2 The intelligent test module 14-3 completes the downhole dynamic parameter acquisition, wireless charging, and data transmission to the intelligent telemetry module 15-3 of the casing annulus telemeter through the signal transceiver, modulator / demodulator, encoder / decoder, electromagnetic receiving coil, single-chip microcomputer, AD converter, preamplifier, temperature sensor, pressure sensor, parameter sensor, etc.

[0063] Specifically, in the process of lifting the fluid in the oil pipe 13 in the production well and monitoring the temperature and pressure, according to the requirements of the test well depth, after the multiple temperature and pressure monitoring short circuits 14 are started, they are connected to the oil pipe 13 and placed in the production well. The oil casing annulus telemeter 15 is introduced through the oil pipe valve 4 of the casing 19 of the eccentric test wellhead 20, and is controlled by the engineering vehicle 21 to be raised and lowered in the inner annulus 14-8 of the oil casing 13. When the oil casing annulus telemeter 15 is lowered to the vicinity of the lowest temperature and pressure monitoring short circuit 14, the control command is transmitted to the oil casing annulus telemeter 15 through the cable 18 of the ground control platform 22. Then, the intelligent telemetry module 15-3 of the oil casing annulus telemeter 15 sends a signal command to the temperature and pressure monitoring short circuit 14, and the temperature and pressure monitoring short circuit 14 completes the command acceptance through the built-in intelligent test module 14-3, thereby realizing temperature and pressure monitoring, and realizing the data transmission of temperature parameters and pressure parameters. The reading and analysis of the temperature and pressure parameters of the production well are completed by transmitting the data to the ground control platform 22 through the cable 18. When the test at this point is completed, the casing annulus telemeter 15 stops sending signal instructions, and the casing annulus telemeter 15 is lifted up by the engineering vehicle 21 to the next temperature and pressure monitoring short circuit 14 to re-monitor the temperature and pressure parameters of the temperature and pressure monitoring short circuit 14.

[0064] Furthermore, the real-time monitoring subsystem 102 for dynamic parameters of production wells includes an eccentric test wellhead 20, which is arranged on one side of the oil pipe 13 in the real-time monitoring subsystem 102 for dynamic parameters of production wells. The eccentric test wellhead 20 is used to place the casing annulus telemeter 15 in the production well.

[0065] In this embodiment, by setting an eccentric test wellhead 20 in the real-time monitoring subsystem 102 for dynamic parameters of production wells, a wide range of channels can be provided, so that the oil casing annulus telemeter 15 can be easily placed in the production well. At the same time, the depth of the oil casing annulus telemeter 15 can be easily adjusted to realize the collection of temperature parameters and pressure parameters at various depths in the production well.

[0066] Furthermore, the real-time monitoring subsystem 102 for dynamic parameters of production wells includes a pump 16 and a sucker rod 17. The pump 16 is used to extract fluid from the oil layer 11 at the wellbore of the production well; the sucker rod 17 is placed above the pump 16, and the sucker rod 17 is used to reciprocate in the oil pipe 11 in the production well to lift the fluid in the oil pipe 11.

[0067] Furthermore, the monitoring system 100 for developing high-condensate oil based on electric heating assisted hot water drive also includes a power supply device (not shown in the figure), which is used to power the devices in the monitoring system 100 for developing high-condensate oil based on electric heating assisted hot water drive.

[0068] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0069] First, according to the injection well temperature real-time monitoring subsystem, the injection medium temperature in the injection well is monitored in real time, and the injection medium in the injection well is heated according to the injection medium temperature to heat the high pour point oil in the oil layer where the injection well is located.

[0070] Then, the temperature parameter and pressure parameter of the fluid in the production well are monitored according to the real-time monitoring subsystem of the production well dynamic parameters, wherein the production well and the injection well are connected to the oil layer.

[0071] The monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding of the present application can monitor the injection medium temperature in the injection well in real time, heat the injection medium of the injection well, and can monitor the temperature parameters and pressure parameters of the fluid in the production well in real time. At the same time, according to the monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding, a basis can be provided for adjusting the electric heating power of the water injection well.

[0072] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding, characterized in that: The system comprises: An injection well temperature real-time monitoring subsystem, which is arranged in the injection well and is used to monitor the injection medium temperature in the injection well in real time, and heat the injection medium in the injection well according to the injection medium temperature, so as to heat the high pour point oil in the oil layer where the injection well is located; The real-time monitoring subsystem for dynamic parameters of production wells is arranged in the production well and is used to monitor the temperature parameters and pressure parameters of the fluid in the production well. The oil layer between the production well and the injection well is connected.

2. The system according to claim 1, characterized in that The injection well temperature real-time monitoring subsystem includes a temperature measuring optical fiber and a perforated oil pipe. The temperature measuring optical fiber is arranged on the outer wall of the perforated oil pipe and is used to obtain the temperature of the injected medium in real time, wherein the perforated oil pipe is placed in the oil layer.

3. The system according to claim 1, characterized in that The injection well temperature real-time monitoring subsystem includes an electric heater and a surface high-pressure power regulating device. The electric heater is used to heat the injection medium, and the surface high-pressure power regulating device is used to adjust the heating power of the electric heater in real time through a heating cable.

4. The system according to claim 1, characterized in that The real-time monitoring subsystem for dynamic parameters of production wells includes a ground control platform and an oil casing annulus telemeter. The ground control platform receives the temperature parameters and pressure parameters of the fluid in the production well transmitted by the oil casing annulus telemeter via a cable to monitor the temperature and pressure of the fluid in the production well in real time.

5. The system according to claim 4, characterized in that The real-time monitoring subsystem for dynamic parameters of the production well includes a temperature and pressure monitoring short circuit, which is connected to adjacent oil pipes in the production well. The temperature and pressure monitoring short circuit is used to collect temperature parameters and pressure parameters corresponding to the fluid in the production well, and send the temperature parameters and pressure parameters to the casing annulus telemeter.

6. The system according to claim 4, characterized in that The oil casing annulus telemeter includes a cable head, an instrument insulation shell, an intelligent telemetering module, an electromagnetic transmitting coil and a guide cone. The intelligent telemetering module is arranged inside the oil casing annulus telemeter. The intelligent telemetering module is used to send control instructions to the temperature and pressure monitoring short circuit to collect the temperature parameters and pressure parameters corresponding to the fluid in the production well, and receive the temperature parameters and the pressure parameters sent by the temperature and pressure monitoring short circuit.

7. The system according to claim 5, characterized in that The temperature and pressure monitoring short circuit includes an upper connector, a high-temperature battery pack, an intelligent test module, an electromagnetic receiving coil, a pressure sensor, a platinum resistance temperature sensor, an instrument insulation shell, an inner annulus and a lower connector. The pressure sensor and the platinum resistance temperature sensor are arranged on the inner annulus wall of the temperature and pressure monitoring short circuit. The pressure sensor is used to collect the pressure parameters of the fluid in the production well in real time, and the platinum resistance temperature sensor is used to collect the temperature parameters of the fluid in the production well in real time.

8. The system according to claim 4, characterized in that The production well dynamic parameter real-time monitoring subsystem comprises an eccentric test wellhead, which is arranged on one side of the production well dynamic parameter real-time monitoring subsystem and is used to place the casing annulus telemeter in the production well.

9. The system according to claim 1, characterized in that The real-time monitoring subsystem for dynamic parameters of the production well includes a pump and a sucker rod. The pump is used to extract fluid from the oil layer at the wellbore of the production well; the sucker rod is placed above the pump, and the sucker rod is used to reciprocate in the oil pipe in the production well to lift the fluid in the oil pipe.

10. The system according to any one of claims 1 to 9, characterized in that: The monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding also includes a power supply device, which is used to supply power to the components in the monitoring system for developing high-condensate oil based on electric heating assisted hot water flooding.

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