Heat pump system and heavy oil thermal recovery system

Abstract

The present disclosure provides a heat pump system and a heavy oil thermal recovery system. The heat pump system comprises: a working medium side, a heat exchange working medium cycle is formed in the working medium side, the working medium side comprises a compressor and a turbine arranged in sequence according to the flow of the heat exchange working medium, the compressor is suitable for compressing the heat exchange working medium, the turbine is suitable for recovering the pressure energy of the heat exchange working medium, and the turbine and the compressor are coaxially connected, the torque generated by the rotation of the turbine is transmitted to the compressor, so that the compressor compresses the heat exchange working medium; a steam side, a water-steam cycle is formed in the steam side, the steam side comprises a first heat exchanger suitable for heat exchange between water and first waste heat generated by an external industrial scene to preheat water in the steam side; and a heat exchanger, the preheated water in the steam side is in communication with the cold side of the heat exchanger, the heat exchange working medium compressed by the compressor in the working medium side is in communication with the hot side of the heat exchanger, and the heat exchanger is suitable for containing water and heat exchange working medium to heat the water in the cold side and generate steam.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to the field of energy utilization technology, specifically to a heat pump system and a heavy oil thermal recovery system. Background Technology

[0002] In some industrial scenarios, high-temperature and high-pressure steam is often required. For example, in industrial scenarios where Steam Assisted Gravity Drainage (SAGD) technology is applied, high-temperature and high-pressure steam is injected to heat the oil reservoir, thereby reducing the viscosity of the crude oil, which then flows to the production well under gravity and is produced by the production well.

[0003] Currently, the aforementioned industrial scenarios typically involve generating steam in boilers by burning natural gas or other fuels to heat water. This process not only consumes large amounts of fuel but also produces carbon oxides and / or nitrogen oxides that need to be collected and treated during combustion.

[0004] Therefore, how to provide a technology that can produce steam without consuming fuel has become an urgent technical problem to be solved. Summary of the Invention

[0005] To address at least one of the above-mentioned and other technical problems in the prior art, this disclosure provides a heat pump system and a heavy oil thermal recovery system, which uses a heat-enhancing heat pump system to gradually heat water on the steam side until steam at the required temperature and pressure is produced.

[0006] Embodiments of this disclosure provide a heat pump system, comprising: a working fluid side, wherein a heat exchange working fluid circulation is formed within the working fluid side, the working fluid side includes a compressor and a turbine arranged sequentially according to the flow rate of the heat exchange working fluid, the compressor being adapted to compress the heat exchange working fluid, the turbine being adapted to recover the pressure energy of the heat exchange working fluid, and the turbine and the compressor being coaxially connected, the torque generated by the rotation of the turbine being transmitted to the compressor to compress the heat exchange working fluid; a steam side, wherein a water-steam circulation is formed within the steam side, the steam side including a first heat exchanger adapted to exchange heat between water and first waste heat generated by an external industrial scene to preheat the water in the steam side; and a heat exchanger, wherein the preheated water in the steam side is connected to the cold side of the heat exchanger, the heat exchange working fluid compressed by the compressor in the working fluid side is connected to the hot side of the heat exchanger, the heat exchanger being adapted to accommodate water and the heat exchange working fluid for heat exchange, so that the water in the cold side is heated and steam is generated.

[0007] According to embodiments of this disclosure, the compressor described above is configured to be driven by an electric motor.

[0008] According to embodiments of this disclosure, the motor is also configured to be powered by renewable energy.

[0009] According to embodiments of this disclosure, the working fluid side further includes a pressure regulating module adapted to regulate the pressure of the heat exchange working fluid entering the compressor.

[0010] According to embodiments of this disclosure, the working fluid side further includes a heat storage section disposed between the compressor and the heat exchanger, suitable for storing at least a portion of the heat in the compressed heat exchange working fluid.

[0011] According to an embodiment of this disclosure, the working fluid side further includes a second heat exchanger, which is disposed upstream of the compressor according to the flow direction of the heat exchange working fluid, and is suitable for exchanging heat between the heat exchange working fluid and the first waste heat to heat the heat exchange working fluid.

[0012] According to an embodiment of this disclosure, the working fluid side further includes a third heat exchanger, which is disposed upstream of the compressor according to the flow direction of the heat exchange working fluid, and is suitable for exchanging heat between the heat exchange working fluid and the steam after utilization on the steam side to heat the heat exchange working fluid.

[0013] Embodiments of this disclosure also provide a heavy oil thermal recovery system, including: a steam injection well and a production well drilled in an oil reservoir; and a heat pump system, wherein the output end of the steam side of the heat pump system is connected to the steam injection well, and is adapted to inject the generated steam into the steam injection well to contact the cold oil in the steam injection well and release heat to form a steam chamber; wherein the steam injection well and the production well include horizontal wells, and the steam injection well is located above the production well.

[0014] According to embodiments of this disclosure, the heat pump system described above is suitable for recovering the first waste heat from the produced fluid generated by the production well.

[0015] According to embodiments of this disclosure, at least a portion of the water in the extracted fluid is circulated into the steam side.

[0016] According to the heat pump system and heavy oil thermal recovery system provided in this disclosure, the water on the steam side is heated by replacing the current method of heating water by burning fuel in a boiler with a heat-enhancing heat pump system. The compressor on the working fluid side is used to increase the pressure of the heat exchange working fluid, thereby increasing the hot side temperature of the heat exchanger, so as to enhance the heat exchange of the steam side in the heat exchanger, so as to achieve the design requirement of "large temperature rise", thereby producing high temperature and high pressure steam. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the heat pump system module connection according to an exemplary embodiment of the present disclosure.

[0018] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0019] 1. Working fluid side;

[0020] 11. Turbine;

[0021] 12. Pressure regulation module;

[0022] 13. Second heat exchanger;

[0023] 14. Third heat exchanger;

[0024] 15. Air compressor;

[0025] 16. Heat storage section;

[0026] 17. Electric motor;

[0027] 2. Heat exchanger;

[0028] 3. Steam side;

[0029] 31. Water pump;

[0030] 32. The first heat exchanger; and

[0031] 4. Horizontal well. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0034] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0035] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0036] In some industrial scenarios, high-temperature and high-pressure steam is often required. For example, in industrial scenarios where Steam Assisted Gravity Drainage (SAGD) technology is used, two horizontal wells are drilled in the oil reservoir, including an upper steam injection well and a lower production well.

[0037] High-temperature, high-pressure steam is injected into the oil reservoir through injection wells. Upon contact with the cold oil, it releases heat, raising the reservoir temperature. As the reservoir temperature rises, the oil viscosity decreases significantly, allowing previously untapped heavy oil or bitumen to begin flowing. As the steam diffuses through the reservoir, the heavy oil or bitumen flows downwards under gravity, converging into the production wells. The condensate from the condensed steam, along with the heavy oil or bitumen, sand, gravel, and other impurities in the reservoir, mix in the production wells to form produced fluid, which is then uniformly pumped to the outside.

[0038] Currently, for the aforementioned industrial scenarios, the steam produced is generated by boiling water in a boiler. In the process of boiling water, not only is a large amount of fuel consumed, but the carbon oxides and nitrogen oxides produced by burning fuel also need to be treated. Therefore, the energy consumption is high and the process is complex.

[0039] Based on this, heat pump technology, as a means with high heat exchange efficiency and reliability, can also be tried to produce steam. However, in actual applications, heat pump systems often cannot meet the design requirements of "large temperature rise" and producing high-pressure steam. Therefore, it has hindered the use of heat pump systems to produce high-temperature and high-pressure steam.

[0040] In view of this, how to provide a heat pump system and a heavy oil thermal recovery system based on the same inventive concept has become an urgent technical problem to be solved.

[0041] Figure 1 This is a schematic diagram of the heat pump system module connection according to an exemplary embodiment of the present disclosure.

[0042] According to the heat pump system provided in this disclosure, such as Figure 1 As shown, the system includes a working fluid side 1, a steam side 3, and a heat exchanger 2. A heat exchange working fluid circulation is formed within the working fluid side 1. The working fluid side 1 includes a compressor 15 and a turbine 11 arranged sequentially according to the flow rate of the heat exchange working fluid. The compressor 15 is used to compress the heat exchange working fluid, and the turbine 11 is used to recover the pressure energy of the heat exchange working fluid. The turbine 1 and compressor 15 are coaxially connected, transmitting the torque generated by the rotation of the turbine 1 to the compressor 15 to compress the heat exchange working fluid. A water-steam circulation is formed within the steam side 3. The steam side 3 includes a first heat exchanger 32, which is used to exchange heat between water and waste heat generated by the external industrial environment to preheat the water in the steam side 3. The preheated water in the steam side 3 is connected to the cold side of the heat exchanger 2. The heat exchange working fluid compressed by the compressor 15 in the working fluid side 1 is connected to the hot side of the heat exchanger 2. The heat exchanger 2 is used to accommodate water and the heat exchange working fluid for heat exchange, so that the water on the cold side is heated to generate steam.

[0043] In one illustrative embodiment, the working fluid side 1 includes a pipeline with a built-in heat exchange working fluid. This pipeline includes, but is not limited to, at least some of the following mechanisms: a pump, valves, flow meters, pressure gauges, filters, expansion tanks, compensators, and vent valves, so that the heat exchange working fluid can form a closed loop on the working fluid side 1. This helps to broaden the application range of the heat pump system to suit various industrial scenarios.

[0044] The working fluid circulating in the working fluid side 1 includes, but is not limited to, air, helium, carbon dioxide, and other gaseous working fluids suitable for heat exchange with the steam side 3.

[0045] In this implementation, a first heat exchanger 32 is installed in the steam side 3. This third heat exchanger 32 utilizes the residual heat from the industrial environment (such as the produced fluid from the production well described below) to exchange heat with the ambient temperature water on the cold side, thereby preheating the ambient temperature water in the steam side 3. The heat exchange medium in the closed-loop circulation in the working medium side 1 is compressed by the compressor 15 during the circulation process, thereby increasing the hot side temperature of the heat exchanger 2 and improving the heat exchange of the steam side 3 in the heat exchanger 2. Through the above design, the ambient temperature (e.g., around 25°C) water can be heated to a higher preheating temperature (e.g., around 140°C) after being preheated by the first heat exchanger 32, and finally exchange heat with the high temperature heat exchange medium in the heat exchanger 2 to be heated to a suitable high temperature (e.g., around 260°C) and high pressure state.

[0046] In this way, compared to current heat pump systems, the design requirement of "large temperature rise" is met, breaking through the current limitation that heat pump systems cannot produce high-temperature and high-pressure steam. Furthermore, compared to the traditional method of generating steam by boiling water in a boiler, there is no need to burn fuel. Therefore, it can be considered that no carbon oxides and nitrogen oxides are produced, which helps to reduce energy consumption and carbon and nitrogen emissions.

[0047] According to embodiments of this disclosure, such as Figure 1 As shown, the compressor 15 is configured to be driven by the motor 17.

[0048] According to embodiments of this disclosure, such as Figure 1 As shown, motor 17 is also configured to be powered by renewable energy.

[0049] In one illustrative embodiment, such as Figure 1 As shown, the shafts of compressor 15, turbine 11, and motor 17 are coaxially connected via couplings. Specifically, compressor 15, driven by motor 17, compresses the heat exchange medium to a high-temperature, high-pressure state. Further, after heat exchange in heat exchanger 2, the high-temperature, high-pressure heat exchange medium releases its pressure energy through turbine 11 to enter the next cycle.

[0050] In this system, turbine 11 rotates due to the pressure energy released by the heat exchange medium. Turbine 11 is coaxially connected to motor 17 and compressor 15; that is, the output shaft of motor 17 is coaxially connected to the drive shaft of compressor 15 and the main shaft of turbine 11. When the heat exchange medium passes through the rotor blades of turbine 11, its pressure energy (released energy and kinetic energy) is converted into kinetic energy to drive the rotor (including the main shaft) to rotate. Since the main shaft is coaxially connected to the drive shaft of compressor 15 (via a coupling), the impeller of compressor 15 can rotate, thereby compressing the heat exchange medium passing through compressor 15 via the stator and diffuser.

[0051] Furthermore, the drive shaft of compressor 15 is also shaft-connected to the drive shaft of motor 17 to drive compressor 15 to operate stably. Motor 17 is driven by an external power source, preferably renewable energy, such as electricity generated through solar panels, wind power, or hydropower. Since electricity generated from renewable energy sources is not stable enough, appropriate energy storage and voltage / current stabilization equipment are required to meet the needs of energy storage and use.

[0052] In this implementation, the coaxially arranged compressor 15, motor 17, and turbine 11 form an integrated design, resulting in a compact layout and high power density, suitable for recovering pressure energy from the heat exchange medium. Furthermore, by coupling the turbine 11 with external renewable energy power generation, the energy can be supplied to the compressor 15, further reducing the energy consumption of the heat pump system.

[0053] According to embodiments of this disclosure, such as Figure 1 As shown, the working fluid side 1 also includes a pressure regulating module 12, which is suitable for regulating the pressure of the heat exchange working fluid entering the compressor 15.

[0054] In one illustrative embodiment, such as Figure 1 As shown, the pressure regulating module 12 is located on the working fluid side 1 and connected in series with the compressor 15. Specifically, the pressure regulating module 12 includes, but is not limited to, regulating the pressure and / or flow rate of the heat exchange working fluid entering the input terminal of the compressor 15 in the working fluid side 1 using a pressure-flow rate method or a volume-flow rate method.

[0055] In one illustrative embodiment, the pressure regulating module 12 includes, but is not limited to, valves and / or valve assemblies disposed in a pipeline on the working fluid side 1. Thus, the flow rate of the heat exchange working fluid through the compressor 15 can be adjusted by regulating the opening degree of the valves or valve assemblies. It should be understood that the embodiments of this disclosure are not limited thereto.

[0056] For example, if necessary, a corresponding pump can be added to the pressure regulating module 12 to further regulate the flow rate of the heat exchange medium during the circulation process.

[0057] In this implementation, the pressure and flow rate of the heat exchange medium entering the input end of the compressor 15 can be adjusted by the pressure regulation module, thereby adjusting the outlet pressure and temperature of the heat exchange medium output from the output end of the compressor 15. Ultimately, the heating power of the heat exchanger 2 can be adjusted so that the parameters (such as temperature and pressure) of the steam exchanged by the heat exchanger 2 can be adjusted. This allows the heat pump system to quantitatively control the produced steam to meet the steam requirements of different industrial scenarios.

[0058] According to embodiments of this disclosure, such as Figure 1 As shown, the working fluid side 1 also includes a heat storage section 16, which is disposed between the compressor 15 and the heat exchanger 2, and is suitable for storing at least a portion of the heat in the compressed heat exchange working fluid.

[0059] In one illustrative embodiment, the heat storage section 16 contains a heat storage medium (such as molten salt or thermal phase change material). Specifically, the heat storage section 16 is located between the output end of the compressor 15 and the hot side of the heat exchanger 2, so as to store at least a portion of the heat in the high-temperature and high-pressure heat exchange medium in the heat storage section 16, or to allow the high-pressure heat exchange medium to absorb heat when passing through the heat storage section 16, so as to achieve a high-temperature and high-pressure state.

[0060] In this embodiment, the heat storage unit located between the compressor 15 and the heat exchanger 2 can be used to store excess heat energy in the heat exchange medium, and can also replenish the heat energy of the heat exchange medium when the temperature is low, so as to maintain the stable operation of the heat pump system.

[0061] According to embodiments of this disclosure, such as Figure 1 As shown, the working fluid side 1 also includes a second heat exchanger 13, which is located upstream of the compressor 15 according to the flow direction of the heat exchange working fluid. It is suitable for exchanging heat between the heat exchange working fluid and the first waste heat to heat the heat exchange working fluid.

[0062] According to embodiments of this disclosure, such as Figure 1 As shown, the working fluid side 1 also includes a third heat exchanger 14, which is located upstream of the compressor 15 according to the flow direction of the heat exchange working fluid. It is suitable for exchanging heat between the heat exchange working fluid and the steam after it has been used on the steam side 3, so as to heat the heat exchange working fluid.

[0063] In one illustrative embodiment, such as Figure 1 As shown, the second heat exchanger 13 and the third heat exchanger 14 are sequentially arranged between the pressure regulating module 12 and the air inlet of the compressor 15 according to the flow direction of the heat exchange medium. Specifically, the second heat exchanger 13 includes, but is not limited to, using the first waste heat from an industrial scenario (such as produced fluid from a production well, as described below) to exchange heat with ambient temperature water on the cold side. The industrial scenarios for the waste heat used by the second heat exchanger 13 and the first heat exchanger 32 can be the same or different. Furthermore, the steam used in the industrial scenario (such as horizontal well 4, i.e., steam injection well) is also connected to the hot side of the third heat exchanger 14 to further heat the heat exchange medium in the working medium side 1.

[0064] In this implementation, by using the first heat exchanger 32, the second heat exchanger 13, and the third heat exchanger 14 in the heat pump system, the working fluid side 1 and the steam side 3 of the heat pump system respectively form a cascade heat exchange with the waste heat source in the external industrial scene, making full use of the external waste heat, so that the heat pump system can achieve heat energy output over a wide temperature range.

[0065] Based on the same inventive concept, this disclosure also provides a heavy oil thermal recovery system (not shown in the figures), including a steam injection well and a production well drilled in the reservoir, and a heat pump system. The output end of the steam side 3 of the heat pump system is connected to the steam injection well, suitable for injecting the generated steam into the steam injection well to contact the cold oil in the steam injection well and release heat to form a steam chamber. The steam injection well and the production well include a horizontal well 4, with the steam injection well located above the production well.

[0066] According to embodiments of this disclosure, the heat pump system is suitable for recovering the first residual heat of produced fluid generated by a production well.

[0067] In one illustrative embodiment (not shown in the figure), the horizontal well 4 includes an upper steam injection well and a lower production well. The steam side 3 of the heat pump system is equipped with a water pump 31 to draw ambient temperature water for circulation, pressurizing the water in the steam side 3. The water then undergoes sufficient heat exchange with the working fluid on the working fluid side 1 via a heat exchanger 2 to generate high-temperature, high-pressure steam. The steam is injected into the reservoir through the steam injection well, releasing heat upon contact with the cold oil, thus raising the temperature of the oil layer. As the oil layer temperature rises, the oil viscosity decreases significantly, allowing previously untapped heavy oil or bitumen to begin flowing. As the steam diffuses within the reservoir, the heavy oil or bitumen flows downwards under gravity, converging in the production well and eventually being extracted.

[0068] In some illustrative embodiments, the heat pump system is specifically designed based on the characteristics of the aforementioned industrial scenario, namely the industrial scenario of Steam Assisted Gravity Drainage (SAGD) technology.

[0069] The produced fluid extracted from the production well is in a liquid state at approximately 160°C and 6.19 bar. In this state, the produced fluid can be used to recover residual heat and connect it to the hot side of the first heat exchanger 32 and the second heat exchanger 13, thereby preheating the ambient temperature water (e.g., 25.41°C, 53 bar) in the steam side 3 and the heat exchange working fluid in the working fluid side 1, respectively.

[0070] Based on this, the preheated room temperature water can be heated to a liquid state of approximately 140°C and 53 bar before entering the cold side of the heat exchanger 2; further, the preheated heat exchange medium can be preheated to a gaseous state of 140°C and 1.01 bar before entering the input end of the compressor 15.

[0071] When the heat exchange medium continues to pass through the compressor 15, it can be compressed to a gaseous state of 464.44°C and 5.62 bar. After passing through the heat exchanger 2 and further exchanging heat with the water in the steam side 3, the water can be heated to a gaseous state of 267.62°C and 53 bar (i.e., steam). Thus, the heavy oil thermal recovery system can produce the steam required to produce the produced fluid without burning fuel.

[0072] According to embodiments of this disclosure, at least a portion of the water in the produced fluid enters the steam side 3 for circulation.

[0073] In one illustrative embodiment, the heavy oil thermal recovery system is also equipped with corresponding processing equipment and water treatment equipment. The processing equipment includes, but is not limited to, equipment configured to remove at least a portion of the ethylene glycol from the produced fluid, while the water treatment equipment is configured to condense and filter at least a portion of the water in the produced fluid, and return this portion of water to the steam side 3 for the next cycle.

[0074] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this disclosure.

[0075] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A heat pump system, characterized in that, include: The working fluid side (1) forms a heat exchange working fluid circulation. The working fluid side (1) includes a compressor (15) and a turbine (11) arranged sequentially according to the flow rate of the heat exchange working fluid. The compressor (15) is suitable for compressing the heat exchange working fluid, and the turbine (11) is suitable for recovering the pressure energy of the heat exchange working fluid. The turbine (1) and the compressor (15) are coaxially connected, and the torque generated by the rotation of the turbine (1) is transmitted to the compressor (15) so that the compressor (15) compresses the heat exchange working fluid. A steam side (3) forms a water-steam cycle. The steam side (3) includes a first heat exchanger (32) adapted to exchange heat between water and waste heat generated by an external industrial environment to preheat the water in the steam side (3). The heat exchanger (2) is connected to the cold side of the heat exchanger (2) via the preheated water on the steam side (3) and the heat exchange medium compressed by the compressor (15) on the working medium side (1) and the hot side of the heat exchanger (2). The heat exchanger (2) is adapted to contain water and the heat exchange medium for heat exchange so that the water on the cold side is heated and steam is generated.

2. The heat pump system according to claim 1, characterized in that, The compressor (15) is configured to be driven by an electric motor (17).

3. The heat pump system according to claim 2, characterized in that, The motor (17) is also configured to be powered by renewable energy.

4. The heat pump system according to claim 1, characterized in that, The working fluid side (1) also includes a pressure regulating module (12) which is suitable for regulating the pressure of the heat exchange working fluid entering the compressor (15).

5. The heat pump system according to claim 1, characterized in that, The working fluid side (1) also includes a heat storage unit (16) disposed between the compressor (15) and the heat exchanger (2), which is suitable for storing at least a portion of the heat in the compressed heat exchange working fluid.

6. The heat pump system according to claim 1, characterized in that, The working fluid side (1) also includes a second heat exchanger (13), which is located upstream of the compressor (15) according to the flow direction of the heat exchange working fluid. It is suitable for exchanging heat between the heat exchange working fluid and the first waste heat to heat the heat exchange working fluid.

7. The heat pump system according to claim 1, characterized in that, The working fluid side (1) also includes a third heat exchanger (14), which is located upstream of the compressor (15) according to the flow direction of the heat exchange working fluid. It is suitable for exchanging heat between the heat exchange working fluid and the steam after it has been used on the steam side (3) to heat the heat exchange working fluid.

8. A heavy oil thermal recovery system, characterized in that, include: Steam injection wells and production wells drilled in oil reservoirs; as well as The heat pump system as described in any one of claims 1 to 7, wherein the output end of the steam side (3) of the heat pump system is connected to the steam injection well, and is adapted to inject the generated steam into the steam injection well to contact the cold oil in the steam injection well and release heat to form a steam chamber; The steam injection well and the production well include a horizontal well (4), and the steam injection well is located above the production well.

9. The heavy oil thermal recovery system according to claim 8, characterized in that, The heat pump system is suitable for recovering the first residual heat of the produced fluid generated by the production well.

10. The heavy oil thermal recovery system according to claim 9, characterized in that, At least a portion of the water in the produced fluid enters the steam side (3) for circulation.

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