Heating and heat tracing circulation process and device for SAGD (Steam Assisted Gravity Drainage) area
By adopting heat tracing circulation and heating circulation processes in the SAGD area and using the SAGD output liquid temperature for heat exchange, the problem of cooling and heating high-temperature liquid is solved, natural gas conservation and heat energy utilization are achieved, and production costs and worker labor intensity are reduced.
Patent Information
- Application Number
- CN202410272801.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-09-12
AI Technical Summary
In SAGD production, high-temperature SAGD output liquid cannot directly enter the gathering and transportation system and needs to be cooled. The existing heat exchange method leads to waste of water resources and high consumption of natural gas, and the high-temperature heat is not reasonably utilized, increasing production costs and labor intensity of workers.
By adopting the heat tracing cycle process and the heating cycle process, the temperature of the SAGD output liquid is used to exchange heat with the coil in the water jacket heater through the heat exchanger, replacing the water jacket heater for heating, realizing the rational use of temperature and saving natural gas use.
It reduces natural gas consumption, production costs, and labor intensity of workers, and rationally utilizes high-temperature thermal energy, thereby improving the stability and efficiency of the production system.
Smart Images
Figure CN120627166A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a heating and heat tracing circulation process and a device thereof for a SAGD area, belonging to the technical field of oil production engineering. Background Art
[0002] Currently, heavy oil recovery technologies primarily include ultra-heavy oil recovery, medium-deep layer heavy oil recovery, reservoir combustion, steam-assisted gravity drainage (SAGD), steam stimulation (CSS), steam flooding, artificial lift for heavy oil, and heavy oil thermal recovery equipment and tools. SAGD is widely used in heavy oil recovery due to its high recovery efficiency.
[0003] Since the development of SAGD in a certain production area in my country in 2009, the underground temperature has risen with the continuous expansion of the steam chamber. The temperature of the produced fluid at the wellhead of the production well has reached over 180°C. Due to the high temperature and high production rate, the SAGD produced fluid cannot be directly fed into the existing gathering and transportation system. Cooling measures must be taken for the produced fluid. Currently, heat exchangers are used to cool the produced fluid. After heat exchange, the temperature of the SAGD produced fluid is reduced from 180°C to below 90°C, ensuring safe production and stable external transportation of the SAGD produced fluid. Therefore, controlling the heat exchange temperature is an essential operational step in SAGD production.
[0004] Initially, the heat exchange cooling source for SAGD produced liquid was softened water provided by the SAGD steam injection station, with a daily consumption of 2000m 3 / d, the softened water after circulation can only be recirculated to the joint station as "wastewater." Although softening the water can achieve the purpose of cooling, it also places a heavy burden on the sewage treatment system and the joint station, and also results in a serious waste of water resources. If the heat exchange temperature does not meet the standard, it will not only put a certain pressure on the heat exchange and external transmission system of the meter transfer station, but also prevent the effective utilization of the high-temperature heat of the well fluid, resulting in a waste of resources and increased production costs.
[0005] In Northeast China, due to the low winter temperatures, the water used for oil production stations, including oil and water blending, as well as internal heating, is like blood, constantly ensuring the efficient operation of the heavy oil production system. However, each system requires heating to ensure the proper functioning of the wells and station systems. Currently, oil production stations use water-jacketed furnaces for heating. The common heating method involves burning natural gas to heat the water in the furnaces, which then heats the oil, water, and external heating coils. While this heating method is relatively efficient, it also carries significant safety risks. Furthermore, the heating process consumes significant amounts of natural gas. According to research, a single SAGD (Serious Agitation Degassing) transfer station consumes nearly 10,000 cubic meters of natural gas per day in winter.
[0006] The water-jacket heaters are primarily fueled by casing gas recovered from the station's production wells. As the SAGD steam chamber continues to expand and the number of interfering wells in the region continues to increase, the number of self-produced gas recovery wells in the old production area and the purity of the natural gas continue to decrease. With the arrival of winter and the increase in natural gas consumption, the stations are struggling to maintain their own production systems, and the production system temperature can only be maintained at the minimum standard. In low temperatures, due to the presence of water in the casing gas, freezing and blockage can occur even with the addition of methanol. This prevents the casing gas from being properly recovered, resulting in low pressure in the station's gas supply system. This requires workers to clear the blockage, which increases their workload and the risk of hydrogen sulfide poisoning. When the water-jacket heaters lose their heating efficiency and fail to achieve the desired temperature, the oil blending, water blending, external transmission, and heating at the production station are severely impacted, making production operations difficult. Summary of the Invention
[0007] In order to solve the problems existing in the prior art, the present invention provides a heating and heat tracing circulation process and its device for the SAGD area, which mainly include a heat tracing circulation process, a heating circulation process and an automatic water replenishment process. The temperature of the SAGD output liquid comes from the steam injected into the ground, and the heat tracing method is used instead of the water jacket heater to meet the temperature requirements of the production and operation of other surrounding oil production stations, thereby saving natural gas and realizing the benefits of natural gas external supply. At the same time, it achieves the purpose of reducing the external transmission temperature of the high-temperature output liquid and rationally utilizing the thermal energy of the high-temperature SAGD output liquid, thereby reducing production costs and reducing the labor intensity of workers.
[0008] The technical solution adopted by the present invention is a heating and heat tracing circulation process for the SAGD area, which is specifically divided into an automatic water replenishment process, a heat tracing circulation process and a heating circulation process. The automatic water replenishment process is to supply water to the oil production station water tank. The water in the oil production station water tank is transported to the heat exchanger through a heat tracing circulation pump. The water in the heat exchanger and the hot water after the first heating of the SAGD produced liquid are injected into the water jacket heating furnace, and the oil mixing coil and the external transmission coil in the water jacket heating furnace are heated and output. After the heating in the water jacket heating furnace is completed, the hot water is transported back to the oil production station water tank. This cycle is repeated to form a heat tracing circulation process.
[0009] The hot water circulated back in the oil production station water tank is transported to the oil production station's internal circulation system by a heating circulation pump to supply the oil production station operation. Finally, the heating circulation water flows back to the oil production station water tank, and this cycle is repeated to form a heating circulation process.
[0010] Furthermore, when the temperature of the hot water after the first heating is not enough to reach the required temperature of the water jacket heating furnace, the hot water after the first heating is re-injected into the heat exchanger and heated for the second time with the SAGD produced liquid after the first heating. The hot liquid after the second heating is injected into the water jacket heating furnace, and the oil-mixing coil and the external transmission coil in the water jacket heating furnace are heated and then output.
[0011] Furthermore, in the automatic water replenishment process, during the water supply process of the oil production station water tank, the liquid level sensor detects the liquid level in the oil production station water tank, converts the liquid level information into an electrical signal and feeds it back to the signal receiving control cabinet, and the signal receiving control cabinet controls the solenoid valve on the water supply pipeline to maintain the liquid level of the oil production station water tank; the temperature sensor monitors the temperature in the oil production station water tank, converts the temperature information into an electrical signal and feeds it back to the signal receiving control cabinet, and the signal receiving control cabinet controls the maintenance of the temperature of the oil production station water tank.
[0012] The technical solution adopted by the present invention is a heating and heat tracing circulation device for SAGD area, including an oil production station water tank, a heat exchanger and a water jacket heating furnace, wherein an upstream gate valve B, a heat tracing circulation pump, a downstream gate valve B and a heat tracing water inlet valve are sequentially installed on the pipeline from the oil production station water tank to the heat exchanger, and the heat tracing circulation pump is also electrically connected to the heat tracing frequency conversion control cabinet. A first heat tracing branch and a second heat tracing branch are respectively provided between the heat exchanger and the water jacket heating furnace, and a heating furnace inlet valve is provided at one end of the first heat tracing branch and the second heat tracing branch close to the water jacket heating furnace. A first heat tracing coil, a second heat tracing coil and a liquid inlet coil are provided in the heat exchanger, wherein the liquid inlet coil is respectively bundled with the first heat tracing coil and the second heat tracing coil in a spiral manner, and a SAGD liquid inlet valve and a SAGD liquid outlet valve are provided on the side wall of the heat exchanger, and the two ends of the liquid inlet coil correspond to the SAGD liquid inlet valve and the SA respectively. GD liquid outlet valve, the two ends of the first heating coil correspond to the heating water inlet valve and the primary outlet valve respectively, the two ends of the second heating coil correspond to the secondary inlet valve and the secondary outlet valve respectively, the pipeline where the primary outlet valve is located is also connected to the pipeline where the secondary inlet valve is located, and a connecting valve is also installed on the first heating branch downstream of the pipeline; the side of the water jacket heating furnace is provided with a fire inlet pipe, which is connected to the chimney, and the liquid flowing in from the heating furnace inlet valve exchanges heat with the external transmission coil and the oil blending coil, and then flows from the heating furnace outlet along the heating pipeline to the oil production station water tank; it also includes the oil production station internal circulation system, the heating pipeline and the return water pipeline between the oil production station water tank and the oil production station internal circulation system; the heating pipeline is sequentially provided with a stop valve and a heating circulation pump from the oil production station water tank to the oil production station internal circulation system, and the heating circulation pump is electrically connected to the heating frequency conversion control cabinet; a return water valve is installed on the return water pipeline.
[0013] Furthermore, it also includes an electronic decontamination device on the water supply pipeline, a solenoid valve, and an upstream gate valve A and a downstream gate valve A installed on both sides of the solenoid valve, as well as a liquid level sensor and a temperature sensor installed on the water tank of the oil production station. The liquid level sensor and the temperature sensor are electrically connected to the signal receiving control cabinet respectively, and the signal receiving control cabinet is electrically connected to the solenoid valve.
[0014] Furthermore, the top of the water jacket heating furnace is provided with a safety valve, a heating furnace vent valve, a manhole, a control valve and a pressure gauge, and the bottom is provided with a drain port.
[0015] Furthermore, the top of the oil production station water tank is provided with an observation port and an overflow valve, the bottom is provided with a discharge valve, and the side wall of the oil production station water tank is provided with a liquid level gauge and a sewage valve.
[0016] Furthermore, a heat exchange vent valve is provided at the bottom of the heat exchanger.
[0017] Furthermore, a heating return valve is provided on the heating pipeline.
[0018] The present invention discloses a heating and heat tracing cycle process and apparatus for use in SAGD (Serious Agitation Degassing) areas. Compared to existing technologies, the present invention utilizes the high temperature of SAGD produced fluid to exchange heat through a heat tracing cycle and a heating cycle, effectively utilizing thermal energy and reducing heat loss. Using the present invention to replace the water-jacketed heating furnace for heating, the heat energy exchange breaks the traditional concept of fuel heating media, effectively saving natural gas consumption, reducing production costs, and reducing worker labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0020] Figure 1 Shown is a schematic diagram of the process of Example 1 of the present invention;
[0021] Figure 2 Shown is a schematic diagram of a local coil in a heat exchanger.
[0022] Figure 1: 1. Water supply pipeline; 2. Electronic decontaminator; 3. Solenoid valve; 4. Upstream gate valve A; 5. Downstream gate valve A; 6. Liquid level sensor; 7. Temperature sensor; 8. Signal receiving control cabinet; 9. Oil production station internal circulation system; 10. Heating pipeline; 11. Stop valve; 12. Heating circulation pump; 13. Heating frequency conversion control cabinet; 14. Return water pipeline; 15. Return water valve; 20. Oil production station water tank; 21. Observation port; 22. Overflow valve; 23. Discharge valve; 24. Liquid level gauge; 25. Drain valve; 30. Heat exchanger; 31. First heating coil; 32. Second heating coil; 33. Liquid inlet coil; 34. SAGD liquid inlet valve; 35. SAGD liquid outlet Valve; 36. Heat exchange vent valve; 37. First heating branch; 38. Second heating branch; 39. Primary outlet valve; 40. Secondary outlet valve; 41. Secondary inlet valve; 42. Connecting valve; 43. Upstream gate valve B; 44. Heating circulation pump; 45. Downstream gate valve B; 46. Heating water inlet valve; 47. Heating pipeline; 48. Heating return valve; 49. Heating frequency conversion control cabinet; 50. Water jacket heating furnace; 51. Fire inlet pipe; 52. Chimney; 53. Heating furnace inlet valve; 54. External transmission coil; 55. Oil mixing coil; 56. Heating furnace water outlet; 57. Safety valve; 58. Heating furnace vent valve; 59. Manhole; 60. Control valve; 61. Pressure gauge; 62. Drain port. Specific implementation methods
[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0024] In order to further understand the content of the present invention, this technical solution is further described below in conjunction with specific implementation methods.
[0025] Example 1:
[0026] like Figures 1-2 As shown, this embodiment provides a heating and heat tracing cycle process and apparatus for a SAGD area, specifically:
[0027] The automatic water replenishment process supplies water to the oil production station water tank 20;
[0028] The water in the oil production station water tank 20 is transported to the heat exchanger 30 by the heat tracing circulation pump 44. The water in the heat exchanger 30 and the hot water after the first heating of the SAGD produced fluid are injected into the water jacket heater 50. The water is then heated in the oil blending coil 55 and the external transmission coil 54 in the water jacket heater 50 before being output. After the heating in the water jacket heater 50 is completed, the hot water is transported back to the oil production station water tank 20. This cycle is repeated to form a heat tracing cycle process.
[0029] The hot water circulated back in the oil production station water tank 20 is transported to the oil production station internal circulation system 9 by the heating circulation pump 12 for the operation of the oil production station. Finally, the heating circulation water flows back to the oil production station water tank 20, and this cycle is repeated to form a heating circulation process.
[0030] When the temperature of the hot water after the first heating is not enough to reach the required temperature of the water jacket heating furnace 50, the hot water after the first heating is re-injected into the heat exchanger 30 and heated for the second time with the SAGD produced liquid after the first heating. The hot liquid after the second heating is injected into the water jacket heating furnace 50, and the oil-mixing coil 55 and the external transmission coil 54 in the water jacket heating furnace 50 are heated and then output.
[0031] During the automatic water replenishment process of supplying water to the oil production station water tank 20, the liquid level sensor 6 detects the liquid level in the oil production station water tank 20, converts the liquid level information into an electrical signal and feeds it back to the signal receiving control cabinet 8, and the signal receiving control cabinet 8 controls the solenoid valve 3 on the water supply pipeline 1 to maintain the liquid level of the oil production station water tank 20. The temperature sensor 7 monitors the temperature in the oil production station water tank 20, converts the temperature information into an electrical signal and feeds it back to the signal receiving control cabinet 8, and the signal receiving control cabinet 8 controls the maintenance of the temperature of the oil production station water tank 20.
[0032] The automatic water replenishment process is realized with the help of an automatic water replenishment mechanism, which specifically includes an electronic decontaminator 2 on the water supply pipeline 1, a solenoid valve 3, and an upstream gate valve A4 and a downstream gate valve A5 installed on both sides of the solenoid valve 3, as well as a liquid level sensor 6 and a temperature sensor 7 installed on the oil production station water tank 20. The liquid level sensor 6 and the temperature sensor 7 are both electrically connected to the signal receiving control cabinet 8, and the signal receiving control cabinet 8 is electrically connected to the solenoid valve 3.
[0033] The heating circulation process is realized with the help of a heating circulation mechanism, which specifically includes an oil production station internal circulation system 9, a heating pipeline 10 and a return water pipeline 14 between the oil production station water tank 20 and the oil production station internal circulation system 9; a shut-off valve 11 and a heating circulation pump 12 are sequentially arranged on the heating pipeline 10 between the oil production station water tank 20 and the oil production station internal circulation system 9, and the heating circulation pump 12 is electrically connected to the heating frequency conversion control cabinet 13; a return water valve 15 is installed on the return water pipeline 14.
[0034] The heat tracing circulation process is realized by means of a heat tracing circulation mechanism, which specifically includes an oil production station water tank 20, a heat exchanger 30 and a water jacket heating furnace 50. The upstream gate valve B43, a heat tracing circulation pump 44, a downstream gate valve B45 and a heat tracing water inlet valve 46 are installed in sequence on the pipeline between the oil production station water tank 20 and the heat exchanger 30. The heat tracing circulation pump 44 is also electrically connected to the heat tracing frequency conversion control cabinet 49. A first heat tracing branch is set between the heat exchanger 30 and the water jacket heating furnace 50. 37 and the second heating branch 38, the first heating branch 37 and the second heating branch 38 are provided with a heating furnace inlet valve 53 at one end near the water jacket heating furnace 50, and a heat exchange vent valve 36 is also provided at the bottom of the heat exchanger 30. The heat exchanger 30 is provided with a first heating coil 31, a second heating coil 32 and a liquid inlet coil 33, wherein the liquid inlet coil 33 is respectively bundled with the first heating coil 31 and the second heating coil 32 in a spiral manner, and the side wall of the heat exchanger 30 is provided with a SAGD liquid inlet valve 34 and SAGD liquid outlet valve 35, the two ends of the liquid inlet coil 33 correspond to the SAGD liquid inlet valve 34 and the SAGD liquid outlet valve 35 respectively, the two ends of the first heating coil 31 correspond to the heating water inlet valve 46 and the primary outlet valve 39 respectively, the two ends of the second heating coil 32 correspond to the secondary inlet valve 41 and the secondary outlet valve 40 respectively, the pipeline where the primary outlet valve 39 is located is also connected to the pipeline where the secondary inlet valve 41 is located, and a connecting valve 42 is also installed on the first heating branch 37 downstream of the pipeline; water jacket heating The side of the furnace 50 is provided with a fire inlet pipe 51, which is connected to a chimney 52. A safety valve 57, a furnace vent valve 58, a manhole 59, a control valve 60 and a pressure gauge 61 are provided at the top of the water-jacketed heating furnace 50. A water outlet 62 is provided at the bottom. The liquid flowing in from the heating furnace inlet valve 53 exchanges heat with the external transmission coil 54 and the oil blending coil 55, and then flows from the heating furnace outlet 56 along the heating pipeline 47 to the oil production station water tank 20. A heating return valve 48 is provided on the heating pipeline 47.
[0035] Furthermore, the top of the oil production station water tank 20 is provided with an observation port 21 and an overflow valve 22, the bottom is provided with a discharge valve 23, and the side wall of the oil production station water tank 20 is provided with a liquid level gauge 24 and a sewage valve 25.
[0036] The oil production station water tank 20 is filled to 2 / 3 of its height using a water supply pipeline 1. Before entering the oil production station water tank 20, the clean water first passes through an electronic decontamination device 2 for decontamination, preventing blockages and impurities in the tank and pipeline. When the water level and temperature in the tank change, a liquid level sensor 6 and a temperature sensor 7 send signals to a signal receiving control cabinet 8. When the liquid level falls below the lower limit, the signal receiving control cabinet 8 activates the solenoid valve 3 to automatically add water. When the liquid level rises above the upper limit, the addition stops, maintaining the liquid level in the tank between 1 / 3 and 2 / 3. The signal receiving control cabinet 8 also contains an alarm light. When the temperature is too high or too low, the red light flashes and an alarm sounds.
[0037] A heat tracing circulation pump 44 delivers clean water from the tank to the heat exchanger 30 via the heat tracing inlet valve 46. SAGD produced fluid enters the heat exchanger 30 through the SAGD inlet valve 34, undergoes spiral heat exchange with the first heat tracing coil 31 and the liquid inlet coil 33, and then is delivered to the water jacket furnace 50 via the primary outlet valve 39, the connecting valve 42, and the furnace inlet valve 53. If the primary heating temperature is insufficient, the connecting valve 42 is closed and the secondary inlet valve 41 is opened for secondary heating. This secondary heating process occurs after heat exchange between the liquid inlet coil 33 and the second heat tracing coil 32. The hot water in the furnace then heats the oil blending coil 55 and the external transfer coil 54 before being delivered. After heating in the water jacket furnace 50, the hot water flows from the furnace outlet 56 along the heat tracing pipeline 47 to the oil production station water tank 20, completing a heat tracing cycle.
[0038] The hot water after the heat circulation in the tank is then transported to the oil production station circulation system 9 through the stop valve 11 by the heating circulation pump 12 for normal operation of the oil production station. Finally, the water returns to the oil production station water tank 20 along the return pipeline 14, forming a heating cycle.
[0039] An automatic water replenishment control system is formed using liquid level sensor 6, temperature sensor 7, signal receiving control cabinet 8, and solenoid valve 3. Liquid level sensor 6 and temperature sensor 7 monitor the liquid level and temperature in oil production station water tank 20, respectively, and transmit these signals to signal receiving control cabinet 8, which controls solenoid valve 3 to achieve automatic water replenishment. The heating frequency conversion control cabinet 13 and heating frequency conversion control cabinet 49 adjust the speeds of heating circulation pump 12 and heating circulation pump 44, respectively.
[0040] Under normal circumstances, it is not necessary to heat the liquid in the external transmission coil 54 and the oil mixing coil 55 in the water jacket heating furnace by burning natural gas with the help of the fire inlet pipe 51. However, for the sake of safety, this solution is only adopted when a special emergency occurs.
[0041] The present invention utilizes the high temperature of the SAGD produced liquid to perform heat exchange through the first heating coil 31, the second heating coil 32 and the liquid inlet coil 33 in the heat exchanger 30, rationally utilizing heat energy and reducing heat loss. The present invention can replace the water jacket heating furnace 50 for temperature treatment. The heat energy replacement breaks the traditional thinking of fuel heating medium, effectively saving natural gas consumption, saving production costs and reducing the labor intensity of workers. It can be tried and implemented in oil production stations mainly using steam drive development. The project has been implemented in succession since the second half of 2020, and has reduced natural gas consumption by 1.1 million m3 to date. 3 / d, saving 1.1 million yuan in costs; 1 million m3 of natural gas was supplied to external customers during the period 3 / d, creating a profit of 1 million yuan. After deducting the cost of laying cables and other expenses of 65,000 yuan, the actual profit was 2.035 million yuan.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A heating and heat tracing cycle process for a SAGD area, characterized in that: It is divided into automatic water replenishment process, heat tracing cycle process and heating cycle process. The automatic water replenishment process is to supply water to the oil production station water tank (20); The water in the oil production station water tank (20) is transported to the heat exchanger (30) through the heat tracing circulation pump (44). The water in the heat exchanger (30) and the hot water after the first heating of the SAGD produced liquid are injected into the water jacket heating furnace (50). The oil mixing coil (55) and the external transmission coil (54) in the water jacket heating furnace (50) are heated and then output. After the heating in the water jacket heating furnace (50) is completed, the hot water is transported back to the oil production station water tank (20). This cycle is repeated to form a heat tracing circulation process. The hot water circulating back from the oil production station water tank (20) is transported to the oil production station internal circulation system (9) by the heating circulation pump (12) to supply the oil production station for operation. Finally, the heating circulation water flows back to the oil production station water tank (20), and this cycle is repeated to form a heating circulation process.
2. A heating and heat tracing cycle process for a SAGD area according to claim 1, characterized in that: When the temperature of the hot water after the first heating is insufficient to reach the required temperature of the water jacket heating furnace (50), the hot water after the first heating is re-injected into the heat exchanger (30) and heated for a second time with the SAGD produced liquid after the first heating. The hot liquid after the second heating is injected into the water jacket heating furnace (50), and the oil mixing coil (55) and the external transmission coil (54) in the water jacket heating furnace (50) are heated before output.
3. A heating and heat tracing cycle process for a SAGD area according to claim 1 or 2, characterized in that: During the automatic water replenishment process for supplying water to the oil production station water tank (20), the liquid level sensor (6) detects the liquid level in the oil production station water tank (20), converts the liquid level information into an electrical signal and feeds it back to the signal receiving control cabinet (8), and the signal receiving control cabinet (8) controls the solenoid valve (3) on the water supply pipeline (1) to achieve the maintenance of the liquid level of the oil production station water tank (20); the temperature sensor (7) monitors the temperature in the oil production station water tank (20), converts the temperature information into an electrical signal and feeds it back to the signal receiving control cabinet (8), and the signal receiving control cabinet (8) controls the maintenance of the temperature of the oil production station water tank (20).
4. A heating and heat tracing circulation device for SAGD area, characterized in that: The invention comprises an oil production station water tank (20), a heat exchanger (30) and a water jacket heating furnace (50), wherein an upstream gate valve B (43), a heat tracing circulation pump (44), a downstream gate valve B (45) and a heat tracing water inlet valve (46) are sequentially installed on the pipeline between the oil production station water tank (20) and the heat exchanger (30), the heat tracing circulation pump (44) is also electrically connected to the heat tracing frequency conversion control cabinet (49), the heat exchanger (30) and the water jacket heating furnace (50) are electrically connected to each other. ) are provided between the first heating branch (37) and the second heating branch (38), and a heating furnace inlet valve (53) is provided at one end of the first heating branch (37) and the second heating branch (38) close to the water jacket heating furnace (50). A first heating coil (31), a second heating coil (32) and a liquid inlet coil (33) are provided in the heat exchanger (30), wherein the liquid inlet coil (33) is respectively bundled with the first heating coil (31) and the second heating coil (32) in a spiral manner. A SAGD liquid inlet valve (34) and a SAGD liquid outlet valve (35) are provided on the side wall of the heat exchanger (30), and the two ends of the liquid inlet coil (33) correspond to the SAGD liquid inlet valve (34) and the SAGD liquid outlet valve (35) respectively. The two ends of the first heating coil (31) correspond to the heating water inlet valve (46) and the primary outlet valve (39) respectively, and the two ends of the second heating coil (32) correspond to the secondary inlet valve (46). (41) and the secondary outlet valve (40), the pipeline where the primary outlet valve (39) is located is also connected to the pipeline where the secondary inlet valve (41) is located, and a connecting valve (42) is also installed on the first heating branch (37) downstream of the pipeline; the liquid flowing in from the heating furnace inlet valve (53) exchanges heat with the external transmission coil (54) and the oil mixing coil (55), and then flows from the heating furnace outlet (56) along the heating pipeline (47) to the oil production station water tank (20); The invention also includes an oil production station internal circulation system (9), a heating pipeline (10) and a return water pipeline (14). The oil production station water tank (20) is connected to the oil production station internal circulation system (9) through the heating pipeline (10) and the return water pipeline (14); a stop valve (11) and a heating circulation pump (12) are sequentially arranged on the heating pipeline (10) from the oil production station water tank (20) to the oil production station internal circulation system (9); the heating circulation pump (12) is electrically connected to the heating frequency conversion control cabinet (13); and a return water valve (15) is installed on the return water pipeline (14).
5. A heating and heat tracing circulation device for a SAGD area according to claim 4, characterized in that: The invention also includes an electronic dirt remover (2) on the water supply pipeline (1), a solenoid valve (3), an upstream gate valve A (4) and a downstream gate valve A (5) installed on both sides of the solenoid valve (3), and a liquid level sensor (6) and a temperature sensor (7) installed on the water tank (20) of the oil production station. The liquid level sensor (6), the temperature sensor (7) and the solenoid valve (3) are respectively electrically connected to a signal receiving control cabinet (8).
6. A heating and heat tracing circulation device for a SAGD area according to claim 4, characterized in that: The side of the water jacket heating furnace (50) is provided with a fire inlet pipe (51), which is communicated with a chimney (52). The top of the water jacket heating furnace (50) is provided with a safety valve (57), a heating furnace vent valve (58), a manhole (59), a control valve (60) and a pressure gauge (61), and the bottom is provided with a water outlet (62).
7. A heating and heat tracing circulation device for a SAGD area according to claim 4, characterized in that: The top of the oil production station water tank (20) is provided with an observation port (21) and an overflow valve (22), the bottom of the oil production station water tank (20) is provided with a discharge valve (23), and the side wall of the oil production station water tank (20) is provided with a liquid level meter (24) and a sewage valve (25).
8. A heating and heat tracing circulation device for a SAGD area according to claim 4, characterized in that: A heat exchange vent valve (36) is also provided at the bottom of the heat exchanger (30).
9. A heating and heat tracing circulation device for a SAGD area according to claim 4, characterized in that: A heating return valve (48) is provided on the heating pipeline (47).