Heating, gathering and transporting system for oil well output liquid

Abstract

The invention relates to an oil well output liquid heating, gathering and transporting system, and belongs to the technical field of oil and gas exploitation. The system comprises a first heat exchanger used for achieving heat exchange between a circulating heat transfer medium and a heat storage medium; the solar heat collector is used for heating the circulating heat transfer medium; the heat transfer medium circulating pipeline is used for circularly flowing a circulating heat transfer medium, and the heat transfer medium circulating pipeline is communicated with the solar heat collector and the heat shell layer of the first heat exchanger; the second heat exchanger is used for realizing heat exchange between the heat storage medium and the oil well output liquid; the heat storage medium circulating pipeline is used for circularly flowing a heat storage medium, and the heat storage medium circulating pipeline is communicated with the cold shell layer of the first heat exchanger and the hot shell layer of the second heat exchanger; the oil well output liquid pipeline is used for conveying heated oil well output liquid, and the oil well output liquid is communicated with the cold shell layer of the second heat exchanger; solar energy is used for providing heat energy for the gathering and transportation system, gas heating and electric heating are replaced, and energy consumption of an oil field can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas exploitation, and in particular to an oil well produced liquid heating and gathering system. Background Art

[0002] At present, natural gas, electricity and crude oil account for the vast majority of the direct energy consumed by oil fields. The energy used in oil and gas production is mainly concentrated in the extraction, injection and transportation systems, and the energy used in the gathering and transportation systems accounts for more than half. Therefore, reducing the energy consumption of the gathering and transportation systems is the key to reducing oil field consumption. Traditional heating includes gas heating, electric heating, etc. Faced with the development bottleneck of energy shortage, energy consumption control of ground gathering and transportation systems is the key. It is imperative to study new, efficient and low-energy heating processes to replace the earliest and most widely used traditional gas heating and electric heating methods. Summary of the invention

[0003] The present application provides an oil well produced fluid heating gathering and transportation system to reduce the energy consumption of the gathering and transportation system.

[0004] The present application provides an oil well produced fluid heating and gathering system, the system comprising:

[0005] A first heat exchanger is used to realize heat exchange between the circulating heat transfer medium and the heat storage medium;

[0006] A solar thermal collector for heating the circulating heat transfer medium;

[0007] A heat transfer medium circulation pipeline, used for circulating the circulating heat transfer medium, the heat transfer medium circulation pipeline being connected to the solar collector and the hot shell of the first heat exchanger;

[0008] The second heat exchanger is used to realize heat exchange between the heat storage medium and the oil well production fluid;

[0009] A heat storage medium circulation pipeline, used for circulating the heat storage medium, wherein the heat storage medium circulation pipeline is connected with the cold shell layer of the first heat exchanger and the hot shell layer of the second heat exchanger;

[0010] The oil well produced fluid pipeline is used for conveying the heated oil well produced fluid, and the oil well produced fluid is connected to the cold shell layer of the second heat exchanger.

[0011] As an optional implementation, the system further includes:

[0012] The heat storage medium storage unit is used to store the heat storage medium, and the heat storage medium circulates and connects to the heat storage medium circulation pipeline.

[0013] As an optional implementation, the system further includes:

[0014] The auxiliary heat unit is used to supplementally heat the heat storage medium, and the auxiliary heat unit is cyclically connected to the heat storage medium circulation pipeline.

[0015] As an optional implementation, the auxiliary heating unit includes an air source water heater and / or an electric water heater.

[0016] As an optional implementation, the system further includes:

[0017] The liquid replenishing unit is used to replenish the circulating heat transfer medium, and the liquid replenishing unit is connected to the heat transfer medium circulating pipeline through a liquid replenishing pipeline.

[0018] As an optional implementation, the system further includes:

[0019] A pressure stabilizing unit is used to stabilize the pressure of the heat transfer medium circulation pipeline, and the pressure stabilizing unit is connected to the liquid replenishing pipeline.

[0020] As an optional implementation, the pressure stabilizing unit includes an expansion tank.

[0021] As an optional implementation, the area A of the solar thermal collector satisfies:

[0022]

[0023] Where Q is the design load of the solar collector, GJ, J C is the average daily solar radiation during the heating season, MJ / m 2 , η CD is the comprehensive conversion efficiency of solar collector, %, η L is the heat loss rate of solar collector, %.

[0024] As an optional implementation, the n CD The value is 55% to 65%.

[0025] As an optional implementation, the n L The value is 5% to 15%.

[0026] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0027] The system provided in the embodiment of the present application can effectively reduce the energy consumption of the oil field by utilizing solar energy to provide thermal energy for the gathering and transportation system, replacing gas heating and electric heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 A schematic diagram of the structure of the system provided in the embodiment of the present application.

[0031] Figure numerals: 1-solar collector, 2-first heat exchanger, 3-air source water heater, 4-electric water heater, 5-shell heat exchanger, 6-heat storage medium storage unit, 7-external heat exchange pump, 8-heat storage pump, 9-internal circulation pump, 10-heat collection pump, 11-liquid replenishment pump, 12-expansion tank, 13-liquid replenishment unit, 14-heat transfer medium circulation pipeline, 15-heat storage medium circulation pipeline, 16-oil well production liquid pipeline, 17-liquid replenishment pipeline. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0034] At present, natural gas, electricity and crude oil account for the vast majority of the direct energy consumed by oil fields. The energy used in oil and gas production is mainly concentrated in the extraction, injection and transportation systems, and the energy used in the gathering and transportation systems accounts for more than half. Therefore, reducing the energy consumption of the gathering and transportation systems is the key to reducing oil field consumption. Traditional heating includes gas heating, electric heating, etc. Faced with the development bottleneck of energy shortage, energy consumption control of ground gathering and transportation systems is the key. It is imperative to study new, efficient and low-energy heating processes to replace the earliest and most widely used traditional gas heating and electric heating methods.

[0035] In northern my country, such as Tianjin, located in the eastern part of the North China Plain, the annual irradiation of the local horizontal surface is 1340kW·h / m 2 The annual radiation amount of the 39° inclined surface is 1374kW·h / m 2. According to the Solar Energy Resource Assessment Method (GB / T37526-2019), Dagang Oilfield is a resource-rich area. Although solar thermal resources are abundant, they have not been used on a large scale in the heating field due to their high collection cost and poor economic efficiency. With the continuous advancement of technology, solar energy collection is now relatively mature, and the thermal efficiency of solar vacuum collector tubes can reach 95%.

[0036] The inventor intends to use solar energy heating as the main body, integrate new energy sources such as light energy, heat energy, and air sources with oil and gas production, provide heat energy for difficult gathering and transportation stations, replace gas heating and electric heating, and thus reduce energy consumption in oil fields.

[0037] Figure 1 A schematic diagram of the structure of the system provided in the embodiment of the present application, such as Figure 1 As shown, an embodiment of the present application provides an oil well produced fluid heating and gathering system, the system comprising:

[0038] The first heat exchanger 2 is used to realize heat exchange between the circulating heat transfer medium and the heat storage medium;

[0039] A solar thermal collector 1, for heating the circulating heat transfer medium;

[0040] A heat transfer medium circulation pipeline 14, used for circulating the circulating heat transfer medium, the heat transfer medium circulation pipeline 14 is connected to the hot shell of the solar collector 1 and the first heat exchanger 2;

[0041] The second heat exchanger is used to realize heat exchange between the heat storage medium and the oil well production fluid;

[0042] A heat storage medium circulation pipeline 15, used for circulating the heat storage medium, the heat storage medium circulation pipeline 15 connecting the cold shell layer of the first heat exchanger 2 and the hot shell layer of the second heat exchanger;

[0043] The oil well produced fluid pipeline 16 is used to convey the heated oil well produced fluid, and the oil well produced fluid is connected to the cold shell layer of the second heat exchanger.

[0044] In some embodiments, the system further includes: a thermal storage medium storage unit 6 for storing the thermal storage medium, and the thermal storage medium circulates and connects to the thermal storage medium circulation pipeline 15 .

[0045] In some embodiments, the system further comprises: an auxiliary heat unit for supplementary heating of the heat storage medium, the auxiliary heat unit being circulated and connected to the heat storage medium circulation pipeline 15. Further, the auxiliary heat unit comprises an air source water heater unit 3 and / or an electric water heater unit 4.

[0046] The air source water heater unit 3 is an energy-saving device that uses high-level energy to make heat flow from low-level heat source air to high-level heat source. It is a form of heat pump, which can convert low-level heat energy that cannot be directly used (such as the heat contained in the air) into high-level heat energy that can be used, thereby achieving the purpose of saving part of the high-level energy (such as coal, gas, oil, electricity, etc.). The cascade heat pump cycle divides the large total temperature difference into two or several sections, selects a suitable refrigerant cycle according to the temperature zone of each section, and then superimposes them, using the condensation heat of the low-temperature stage to supply the evaporation load of the high-temperature stage, so that the high-temperature stage obtains a higher condensation temperature. The rated heating temperature can reach 85°C. It can adapt to the operating conditions of the ambient temperature between -35°C and 45°C, the maximum heating power of a single unit is 105kW, and the heat pump COP can reach 1.5 to 3.4.

[0047] In some embodiments, the system further includes: a liquid replenishing unit 13, which is used to replenish the circulating heat transfer medium, and the liquid replenishing unit 13 is connected to the heat transfer medium circulation pipeline 14 through a liquid replenishing pipeline 17. In order to maintain the pressure stability of the entire system, the system further includes: a pressure stabilizing unit, which is used to stabilize the pressure of the heat transfer medium circulation pipeline, and the pressure stabilizing unit is connected to the liquid replenishing pipeline 17. Further, the pressure stabilizing unit includes an expansion tank 12.

[0048] It should be noted that power components for driving the flow of the medium are provided on each pipeline. For example, a heat collection pump 10 is provided on the heat transfer medium circulation pipeline 14, an internal circulation pump 9 and an external heat exchange pump 7 are provided on the heat storage medium circulation pipeline 15, a heat storage pump 8 is provided on the connecting pipeline between the auxiliary heat unit and the heat storage medium circulation pipeline 15, and a liquid replenishment pump 11 is provided on the liquid replenishment pipeline 17.

[0049] The system uses solar energy to provide heat energy for the gathering and transportation system, replacing gas heating and electric heating, which can effectively reduce the energy consumption of oil fields. It is especially suitable for gathering and transportation in remote areas, difficult transportation, and oil with poor physical properties.

[0050] In view of the characteristics of solar energy and economic benefits, certain requirements are required for applicable working conditions:

[0051] ① Sufficient sunlight, no obstructions, sufficient free space or favorable conditions for land acquisition. The most important condition for solar thermal replacement is the land area. The available area can reduce the land acquisition fee and increase the internal rate of return.

[0052] ② The heat load should be greater than 15KW: In view of the fact that the planning infrastructure of solar thermal replacement is basically the same, so, if the land conditions permit, the greater the heating load, the higher the internal rate of return.

[0053] ③ Continuous heating is required all year round. Be careful when choosing for seasonal or intermittent heating.

[0054] To achieve the above goals, it is necessary to analyze the physical properties of crude oil, calculate the heat load, the number of collectors, the capacity of the water storage tank, and the selection of air source heat pumps. The specific process is as follows:

[0055] Determine the transportation temperature: According to the analysis of the oil viscosity-temperature curve, determine the gathering and transportation method: single-tube heating transportation, water-mixed heating transportation, and then determine the transportation temperature.

[0056] Heat load calculation: Calculate the required heating load of the block based on the determined transportation temperature, target block oil production, liquid production, gas production, water content, temperature, pressure, gathering and transportation radius and other production conditions. The calculation formula is as follows:

[0057]

[0058] Where P is the required heating load, kw; q is the amount of heating medium, m 3 ; ρ is the density of the heating medium, kg / m 3 ; C is the specific heat of the heating medium, J / (kg·℃); T 温差 is the temperature difference between the inlet and outlet of the heating medium, °C. It should be noted that q 油 Refers to the amount of oil used as the heating medium, ρ 油 Refers to the density of the heating medium as oil, C 油 It refers to the specific heat of oil as the heating medium.

[0059] Determination of collector: According to the heat load of the target block, determine the daily heating amount, and then determine the scale of the collector. The calculation formula is as follows: Where: A: collector area, m 2 ; Q: Design calculation load of solar energy system, GJ; J C : Average daily solar radiation during the local heating season, 1374kW·h / m 2 , 15.77MJ / m 2 ; η CD ——Collector comprehensive conversion efficiency, take 59%; η L ——The heat loss rate of the solar energy system is taken as 10%.

[0060] Selection of air source heat pump: According to the total daily heat required by the well site, the average daily heating capacity of the heat collection system is deducted, and the remaining heat is supplemented by the air source heat pump using the 8-hour valley power time at night, which can provide about 13.5 hours of heat demand for the well site every day. Combined with the efficiency of the air source heat pump (here 2.5 is selected, which can be adjusted according to actual conditions), the required matching input power is calculated. The calculation formula is as follows: Among them, Q0: total power of air source heat pump (KW), Q1: daily heating capacity required by the well site in MJ / d, Q2: daily heating capacity of the collector system (MJ / d), T: daily valley power time (8 hours).

[0061] Based on daily heat demand, taking into account factors such as peak, flat and valley electricity time periods and local light conditions, the scale of the energy storage tank and the scale of the air source heat pump are determined.

[0062] Energy storage tank determination: According to the monthly solar energy guarantee rate, the monthly solar thermal water storage capacity and valley electricity water storage capacity are calculated respectively to determine the effective volume of the energy storage tank.

[0063] Electric water heater unit determination: A backup facility designed to ensure production when the collector and air source cannot meet production needs due to special working conditions such as weather.

[0064] The system mainly includes three heating cycles: the heating cycle of the circulating heat transfer medium in the CPC (compound parabolic collector, hereinafter referred to as CPC) heat pipe vacuum tube collector, the heat storage medium cycle that exchanges heat with the circulating heat transfer medium, and the oil well production fluid cycle that exchanges heat with the heat storage medium. The specific operation process of the system is as follows:

[0065] The circulating heat transfer medium adopts fast-heating antifreeze and anti-boiling high-efficiency heat transfer composite liquid. The circulating heat transfer medium of the solar collector heats up under light conditions. When the temperature rises to the set temperature, the power source heat collection pump is automatically turned on and begins to circulate in the system, and the light heat absorbed in the solar collector vacuum heat pipe is exchanged with the heat storage medium in the first heat exchanger. After the heat exchange, the low-temperature circulating heat transfer medium continues to circulate to the solar collector for heating.

[0066] After being heated by the first heat exchanger, the heat storage medium circulates through the internal circulation pump, and there are two main flow directions: first, it heats the oil well output fluid, circulates to the second heat exchanger through the external heat exchange pump, and heats the oil well output fluid. After heat exchange, the low-temperature heat storage medium returns to the first heat exchanger through the internal circulation pump. Secondly, it stores energy for the heat storage medium storage unit. When the solar radiation is strong and the second heat exchanger cannot completely absorb the heat absorbed by the solar collector, the internal circulation pump automatically adjusts the flow rate of the stored water according to the temperature of the circulating heat transfer medium to ensure production operation while storing heat for the heat storage medium storage unit. When the solar collector stops running, the internal circulation pump circulates the heat storage medium storage unit to heat the oil well output fluid.

[0067] The oil well output fluid exchanges heat with the heat storage medium through the second heat exchanger, and after reaching the set transportation temperature, it is transported to the gathering and transportation pipeline network. The heat exchange between solar radiation heat energy and the oil well output fluid is achieved through the circulating heat transfer medium.

[0068] When the solar radiation is weak, there is no light and the heat demand cannot be met, or during the off-peak hours at night, the air energy unit is started to store heat for the heat storage medium storage unit and heat the oil well output fluid. The water storage electric hot water unit is a backup guarantee facility that is activated when the solar collector and air source unit cannot meet the production needs.

[0069] The replenishment tank automatically determines whether the collector needs replenishment based on the operating pressure of the heat collector pump. When the pressure is lower than the set operating pressure low line value, the replenishment pump is started to replenish the fluid; when the system pressure is reached, the replenishment pump is turned off to stop replenishment; when the replenishment tank low liquid level alarm sounds, the replenishment pump is turned off to stop replenishment and an alarm is sounded.

[0070] The system pressure is stabilized by the expansion tank, which adopts the diaphragm type. When the system loses pressure, the expansion tank will automatically replenish the fluid first, reducing the number of times the replenishment pump is turned on. When the pressure is higher than the set pressure high line value, the expansion tank is opened to release the pressure to ensure the smooth operation of the system.

[0071] The system has good application prospects in remote areas with poor oil properties, heating collection and transportation requirements, sufficient space, and good lighting conditions. The light-thermal substitution rate can reach 50%, effectively reducing carbon emissions and effectively guiding actual oilfield production.

[0072] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0073] Example 1

[0074] There are 12 oil wells in a well field of an oil field, which adopt oil pulling production. Well field liquid production / m 3 / d, oil volume / t / d, water content 67.50%, liquid temperature 48.0℃. Currently, one gas heating furnace is used for external transmission heating; 6 oil wells are heated by wellbore heat exchange, and the heat source is 4 small gas boilers. The gas source is natural gas.

[0075] The total annual power consumption of the well site is 475.95×10 4 kW·h, including: power consumption of oil pump and electric heating cable 174.00×10 4 kW·h, the oil storage tank consumes 296.95×10 4 kW·h, other power consumption 5.00×10 4 kW·h; annual gas consumption 29.80×10 4 Nm 3 .

[0076] After the gathering and transportation pipeline network is put into operation, the oil produced by the oil wells in the well site is heated by electric heating of the pumping wells, mixed with water at the wellhead, and then enters the heating system for heating, and finally enters the gathering and transportation pipeline network for external transmission.

[0077] ①Heat load calculation

[0078] At present, the heating load of the well cluster field is divided into two parts, namely water mixing and external heating and oil well heating.

[0079] The water injection volume at the wellhead is 102.84m 3 / d, the temperature of the water-added liquid is 40℃; the produced liquid is mixed with the water and then heated for external transmission, and the external transmission volume is 255.76m 3 / d, oil volume 50.08t / d, water content 80.42%, by analyzing the viscosity-temperature curve of the oil, the external transmission temperature is determined to be 70℃, and then the heat load is calculated. According to the heat load calculation formula, the results are shown in Table 1, and the total heat load required for the well site is calculated to be 397.09kw.

[0080] Table 1 Well site heat load calculation

[0081]

[0082] ② Solar collector selection

[0083] By comparing the single-row, double-row, and triple-row arrangements of solar collectors, the double-row arrangement is chosen as the one with the lowest cost per unit area. The front and rear installation spacing of the double-row arrangement is calculated according to the "Technical Standard for Solar Heating Engineering" (GB 50495-2019), and the front and rear installation spacing is determined to be 2m considering the winter shading factor. According to the open space area of ​​the well cluster field and the heat load calculated by the well field, it can be calculated that the well field can arrange a maximum of 648 sets of collectors.

[0084] ③ Selection of air source water heater

[0085] The annual average COP of air source water heater can reach 2.78, while that of electric heating is 0.9. The heat output of air source water heater can increase by 6.77MJ per kilowatt-hour compared with electric heating. Calculated based on the 33kW electric power of air source water heater, it can generate 223.41MJ more heat per hour than electric heating, saving 62kW·h of electricity. If it runs for 8 hours per day in valley electricity, it can save 18.10×104kW·h of electricity and 62,700 yuan of electricity bills per year. The price difference between air source and electric heating can be recovered in 2-3 years. Therefore, the auxiliary heat source of this time adopts air source water heater.

[0086] According to the monthly solar energy guarantee rate and the heating capacity of the air source water heater, the opening time of the air source water heater is calculated under different numbers of air source water heaters, and the appropriate energy storage capacity is selected. The corresponding relationship between cost saving and investment is comprehensively considered, and the optimal number of air source water heaters is selected as the design scale. The air source water heaters are operated in the priority order of valley section, flat section, peak section, and peak section to minimize the operating electricity cost. Through comparative analysis, it is determined that the number of air source water heaters is 6, 5 in use and 1 in reserve, and the comprehensive cost is the lowest at this time.

[0087] In summary, in order to realize the benefit development of new energy, through comprehensive optimization research on oil well production, water content, water blending, external transmission temperature, crude oil physical properties, heat load calculation, etc., the new process technology of "photothermal + heat storage + air source heat pump + electric auxiliary heating" is adopted to replace the traditional electric heating and gas heating methods, and provide heat energy for well site water blending, external transmission and wellbore heating, forming a green and efficient ground process system. At present, the site has been put into operation and has been running smoothly for more than eight months, saving 170×10 4 kW·h, solar term 29.80×10 4 m 3 Compared with the gas heating and transmission process, it can save 960 tons of standard coal and reduce CO2 emissions by 4,733 tons per year.

[0088] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0089] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the description of the present specification, the terms "including", "comprising", etc. refer to "including but not limited to". In this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In this article, "and / or" describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In this article, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, "at least one of a, b, or c", or "at least one of a, b and c", can both mean: a, b, c, ab (i.e. a and b), ac, bc, or abc, where a, b, c can be single or plural, respectively.

[0090] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An oil well produced liquid heating and gathering system, characterized in that: The system comprises: A first heat exchanger is used to realize heat exchange between the circulating heat transfer medium and the heat storage medium; A solar thermal collector for heating the circulating heat transfer medium; A heat transfer medium circulation pipeline, used for circulating the circulating heat transfer medium, the heat transfer medium circulation pipeline being connected to the solar collector and the hot shell of the first heat exchanger; The second heat exchanger is used to realize heat exchange between the heat storage medium and the oil well production fluid; A heat storage medium circulation pipeline, used for circulating the heat storage medium, wherein the heat storage medium circulation pipeline is connected with the cold shell layer of the first heat exchanger and the hot shell layer of the second heat exchanger; The oil well produced fluid pipeline is used for conveying the heated oil well produced fluid, and the oil well produced fluid is connected to the cold shell layer of the second heat exchanger.

2. The oil well produced liquid heating and transportation system according to claim 1, characterized in that: The system further comprises: The heat storage medium storage unit is used to store the heat storage medium, and the heat storage medium circulates and is connected to the heat storage medium circulation pipeline.

3. The oil well produced liquid heating and transportation system according to claim 1, characterized in that: The system further comprises: The auxiliary heat unit is used to supplementally heat the heat storage medium, and the auxiliary heat unit is cyclically connected to the heat storage medium circulation pipeline.

4. The oil well produced liquid heating and transportation system according to claim 3, characterized in that: The auxiliary heating unit includes an air source water heater and / or an electric water heater.

5. The oil well produced liquid heating and transportation system according to claim 1, characterized in that: The system further comprises: The liquid replenishing unit is used to replenish the circulating heat transfer medium, and the liquid replenishing unit is connected to the heat transfer medium circulating pipeline through a liquid replenishing pipeline.

6. The oil well produced liquid heating and transportation system according to claim 5, characterized in that: The system further comprises: A pressure stabilizing unit is used to stabilize the pressure of the heat transfer medium circulation pipeline, and the pressure stabilizing unit is connected to the liquid replenishing pipeline.

7. The oil well produced liquid heating and transportation system according to claim 6, characterized in that: The pressure stabilizing unit includes an expansion tank.

8. The oil well produced liquid heating and transportation system according to claim 1, characterized in that: The area A of the solar collector satisfies: Where Q is the design load of the solar collector, GJ, J C is the average daily solar radiation during the heating season, MJ / m 2 , ηCD is the comprehensive conversion efficiency of the solar collector, %, and ηL is the heat loss rate of the solar collector, %.

9. The oil well produced liquid heating and transportation system according to claim 8, characterized in that: The value of ηCD is 55% to 65%.

10. The oil well produced liquid heating and transportation system according to claim 8, characterized in that: The value of ηL is 5% to 15%.

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