Well spacing simulation device of geothermal heat exchange system and simulation method of well spacing simulation device

Abstract

The invention relates to the technical field of geothermal development, in particular to a well spacing simulation device of a geothermal heat exchange system and a simulation method.The device comprises a box body, a rock core, a box cover, a working medium container, a liquid inlet pipe and a liquid outlet pipe, the box body is provided with an inner cavity, the rock core is located in the inner cavity, and a plurality of liquid inlet and outlet holes are formed in the rock core; a plurality of pipeline connectors are arranged on the box cover; the inlet ends of the liquid inlet pipes are communicated with the working medium container; and negative pressure pumps are arranged on the liquid outlet pipes. The device overcomes the defects that in the prior art, the heat exchange process of different well spacing schemes cannot be simulated, and the well spacing schemes are inconvenient to design and research, the multiple liquid inlet and outlet holes are formed in the rock core to simulate the multiple well positions, and then heat exchange is conducted on the working media according to the well spacing schemes; and finally, data such as heat and flow of the working medium are measured, calculated and analyzed, so that researchers can be helped to research the influence of different well spacing schemes on the development process, and a better well spacing scheme can be designed and selected.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal development, and more specifically, to a well layout simulation device and a simulation method for a geothermal heat exchange system. Background Art

[0002] Geothermal energy is a clean, renewable energy source with huge development potential and broad application prospects. Compared with traditional fossil fuels, geothermal energy does not produce greenhouse gases and other pollutants during energy utilization, so it is regarded as an environmentally friendly energy source. In addition, geothermal resources are abundant, widely distributed, not affected by seasons and weather, and are stable and predictable, which can provide security for regional energy supply.

[0003] The development and utilization of geothermal energy helps to achieve energy diversification, reduce dependence on fossil fuels, and improve the safety of energy use. At present, the research on geothermal resources is mainly focused on exploration and development and utilization. For example, the prior art discloses a simulation experimental device for exploiting deep geothermal resources, which includes a formation module, a heating module, a coaxial casing well module and a computer; the coaxial casing well module is used to simulate the heat exchange process between the coaxial casing well and the formation and record the temperature change of the circulating heat exchange medium; the formation module is used to simulate the deep formation conditions; the heating module is used to heat the formation module, and can calculate the heat loss during the heating process for comparison with the heat exchange amount.

[0004] In geothermal exploitation, a reasonable well layout is crucial, as it is directly related to the heat exchange efficiency of geothermal working fluids, the economy of the entire geothermal system, the stability of operation, and geological changes. Reasonable well location and well spacing design can ensure a higher heat source exploitation rate and lower exploitation costs, and enable the geothermal system to operate stably. However, the above-mentioned existing technology can only be used to simulate the heat exchange process of working fluids under one well layout scheme, and cannot simulate the heat exchange process under different well layout schemes, so it is impossible to confirm a better well layout scheme, which is not convenient for the design and research of the well layout scheme. Summary of the invention

[0005] In view of the problem that the above-mentioned prior art cannot simulate the heat exchange process of different well layout schemes and is not convenient for the design and research of well layout schemes, the present invention provides a well layout simulation device and a simulation method for a geothermal heat exchange system, which can simulate the heat exchange process of different well layout schemes to help researchers evaluate the rationality of different well layout schemes, design a better well network layout, and is conducive to the study of the impact of different well layout schemes on the development process.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] A well layout simulation device for a geothermal heat exchange system, comprising a box body, a core, a box cover, a working fluid container, at least one liquid inlet pipe and at least one liquid outlet pipe, the box body is provided with an inner cavity, the core is located in the inner cavity, and the core is provided with a plurality of liquid inlet and outlet holes; the box cover is detachably connected to the box body, and the box cover is provided with a plurality of pipe interfaces, and the pipe interfaces are connected to the liquid inlet and outlet holes in a one-to-one correspondence; the inlet ends of the liquid inlet pipes are connected to the working fluid container, and the outlet ends extend into the liquid inlet and outlet holes; the inlet ends of the liquid outlet pipes extend into the liquid inlet and outlet holes, and the liquid outlet pipes are provided with negative pressure pumps.

[0008] When the above technical scheme is implemented, the core is heated to the heat storage temperature and then placed in the inner cavity, and then the box cover is closed; then the corresponding inlet and outlet holes are selected as the well positions for the inlet pipe and the outlet pipe according to the well layout scheme, and the outlet end of the inlet pipe and the inlet end of the outlet pipe are respectively extended into different inlet and outlet holes through different pipe interfaces; then the working fluid in the working fluid container is input into the inlet and outlet holes through the inlet pipe, so that the working fluid penetrates into the core; then the negative pressure pump is started to generate negative pressure inside the outlet pipe, thereby sucking out the working fluid in the core. It can be understood that the working fluid sucked out of the core is the working fluid that has undergone heat exchange. Finally, by measuring, calculating and analyzing the outlet flow rate and total calorific value of the working fluid, it can help researchers study the impact of different well layout schemes on the development process, thereby facilitating the design and selection of a better well layout scheme.

[0009] Preferably, the inlet and outlet holes are distributed in a matrix on the core, which can maximize the space utilization of the core and facilitate researchers to modify the well layout plan more flexibly.

[0010] Preferably, a waste liquid container is further included, and the outlet ends of the liquid outlet pipes are all connected to the waste liquid container. The waste liquid container can collect the working fluid output from the liquid outlet pipe to facilitate subsequent processing of the working fluid.

[0011] Preferably, the liquid inlet pipe and the liquid outlet pipe are both provided with a temperature sensor and a flow meter. The temperature sensor is used to measure the temperature of the working fluid in real time, and the flow meter is used to measure the flow rate of the working fluid in real time. The provision of the temperature sensor and the flow meter facilitates researchers to obtain the temperature and flow rate data of the working fluid in real time, which can improve the simulation efficiency and is conducive to improving the accuracy of the evaluation of the well layout plan.

[0012] Preferably, the pipe interface is provided with internal threads, the liquid inlet pipe and the liquid outlet pipe are provided with external threads, and the liquid inlet pipe and the liquid outlet pipe are respectively threadedly connected to the pipe interface. By connecting the liquid inlet pipe and the liquid outlet pipe to the pipe interface respectively, the liquid inlet pipe and the liquid outlet pipe can be kept stable during the process of conveying the working medium, and the liquid inlet pipe and the liquid outlet pipe can be prevented from being separated from the core.

[0013] Preferably, a seepage portion for fitting with the inner wall of the inlet and outlet holes is provided at the outlet end of the liquid inlet pipe, and a plurality of first seepage holes are provided on the seepage portion; a suction portion for fitting with the inner wall of the inlet and outlet holes is provided at the inlet end of the liquid outlet pipe, and a plurality of second seepage holes are provided on the suction portion. After one end of the liquid inlet pipe is inserted into the inlet and outlet holes and fits with the inner wall of the inlet and outlet holes, the working fluid can be inserted into the core through the first seepage hole. Similarly, after one end of the liquid outlet pipe is inserted into the inlet and outlet holes, the working fluid in the core can be sucked out through the second seepage hole. Providing the first seepage hole can improve the infiltration efficiency of the working fluid, and providing the second seepage hole can improve the suction efficiency of the working fluid. In the actual development process, the same method is often used for geothermal development, so this setting can more realistically restore the actual development process.

[0014] Preferably, a temperature probe is also included; the core is provided with a plurality of temperature measuring holes, and the box cover is provided with a plurality of through-holes connected to the temperature measuring holes. During the heat exchange process, the temperature probe can be regularly inserted into different temperature measuring holes to measure the temperature, so as to draw a spatiotemporal temperature variation diagram of the core. According to the spatiotemporal temperature variation diagram, the variation of the temperature inside the core with time and space can be intuitively understood, so as to understand the influence of different well layout schemes on the heat exchange process and the core temperature. At the same time, the risks that may be encountered in the geothermal development process, such as the risk of geological changes such as rock fractures, can also be evaluated according to the temperature variation diagram.

[0015] The present invention also provides a well layout simulation method for a geothermal heat exchange system, which is applied to the well layout simulation device for the geothermal heat exchange system, and comprises the following steps:

[0016] S1: firstly heat the core to a set heat storage temperature, then put the core into the inner cavity, and cover the box cover;

[0017] S2: selecting the liquid inlet and outlet holes at corresponding positions according to the well layout plan, and extending the outlet end of the liquid inlet pipe and the inlet end of the liquid outlet pipe into different liquid inlet and outlet holes through different pipeline interfaces respectively;

[0018] S3: The working medium in the working medium container is input into the liquid inlet and outlet holes through the liquid inlet pipe; then the pumping rate of the negative pressure pump is set according to the well layout plan, and the working medium in the core is sucked out through the liquid outlet pipe;

[0019] S4: Calculate the total heat produced; and evaluate the well layout plan based on the total heat produced, the outlet temperature of the working fluid, and the outlet flow rate.

[0020] Preferably, in step S3, a temperature probe is also used to periodically extend into the temperature measuring hole to measure the temperature; in step S4, a spatiotemporal variation diagram of the core temperature is drawn based on the temperature data measured by the temperature probe, and a well layout scheme is selected in combination with the spatiotemporal variation diagram of the core temperature. The spatiotemporal temperature variation diagram can be used to intuitively understand the changes in the temperature inside the core over time and space, thereby understanding the effects of different well layout schemes on the heat exchange process and the core temperature. At the same time, the risks that may be encountered in the geothermal development process, such as the risk of geological changes such as rock fractures, can also be evaluated based on the temperature variation diagram.

[0021] Preferably, in step S4, the total calorific value is calculated as follows:

[0022] in

[0023] In the formula, Q i is the heat brought out by the working fluid within 5 seconds, KJ; c is the specific heat capacity, KJ / (Kg·K); q i is the outlet volume flow rate, cm 3 / s;T outi is the outlet temperature of the working fluid, K; T ini is the working fluid inlet temperature, K; Q totol It is the total heat taken by the working fluid within 5 seconds.

[0024] The beneficial effects of the present invention are as follows: a plurality of fluid inlet and outlet holes are arranged on the core to simulate a plurality of well locations, the connection positions of the fluid inlet pipe and the fluid outlet pipe are selected according to different well layout schemes, the heat and flow rate of the pumped working fluid and other data are measured, calculated and analyzed, and the well layout scheme is evaluated in combination with the temporal and spatial variation diagram of the core temperature. This can not only help researchers to study the impact of different well layout schemes on the development process, and is conducive to designing and selecting a better well layout scheme, but also is conducive to reducing the risk of geological changes during actual development. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a well layout simulation device for a geothermal heat exchange system;

[0026] Figure 2 It is a structural diagram of the box body and the box cover;

[0027] Figure 3 It is a schematic diagram of the structure of the core;

[0028] Figure 4 It is a schematic diagram of the structure of the outlet end of the liquid inlet pipe.

[0029] In the accompanying drawings: 1-box body; 101-inner cavity; 102-first threaded hole; 2-core; 201-inlet and outlet holes; 3-box cover; 301-pipeline interface; 302-protrusion; 303-second threaded hole; 4-working fluid container; 5-liquid inlet pipe; 501-seepage part; 502-first seepage through hole; 6-liquid outlet pipe; 7-negative pressure pump; 8-waste liquid container; 9-temperature sensor; 10-flow meter; 11-temperature probe; 12-data processing and display module. DETAILED DESCRIPTION

[0030] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0033] Example 1

[0034] This embodiment is a first embodiment of a well layout simulation device for a geothermal heat exchange system. Figures 1 to 3 As shown, it includes a box body 1, a core 2, a box cover 3, a working fluid container 4, a liquid inlet pipe 5 and a liquid outlet pipe 6. The box body 1 is provided with an inner cavity 101, the core 2 is located in the inner cavity 101 and fits with the inner wall of the inner cavity 101, and a plurality of liquid inlet and outlet holes 201 are provided on the core 2. The aperture of the liquid inlet and outlet holes 201 is 22 mm, and the hole depth is 100 mm; the box cover 3 is detachably connected to the box body 1, and a plurality of pipe interfaces 301 are provided on the box cover 3. The pipe interfaces 301 are connected with the liquid inlet and outlet holes 201 in a one-to-one correspondence, that is, one liquid inlet and outlet hole 201 is connected with one pipe interface 301 in correspondence; the inlet end of the liquid inlet pipe 5 is connected with the working fluid container 4, and the outlet end extends into the liquid inlet and outlet hole 201; the inlet end of the liquid outlet pipe 6 extends into the liquid inlet and outlet hole 201, and a negative pressure pump 7 is provided on the liquid outlet pipe 6.

[0035] Specifically, four screws (not shown in the figure) are included. A first threaded hole 102 is provided at each of the four top corners of the box body 1, and a second threaded hole 303 is provided at each of the four top corners of the box cover 3. The first threaded hole 102 and the second threaded hole 303 are connected by screws.

[0036] Furthermore, a protrusion 302 is provided at the bottom of the box cover 3, and a sealing rubber ring (not shown in the figure) is provided outside the protrusion 302. The protrusion 302 can extend into the inner cavity 101 to facilitate the positioning of the box cover 3.

[0037] Furthermore, the inlet and outlet holes 201 are distributed in a matrix on the core 2, which can maximize the space utilization of the core 2 and facilitate researchers to modify the well layout plan more flexibly.

[0038] Furthermore, a heating component with adjustable heating temperature is provided in the working medium container 4. The heating component can heat the working medium in the working medium container 4 to a set temperature.

[0039] The working principle or workflow of this embodiment: during implementation, the core 2 is heated to the heat storage temperature and then placed in the inner cavity 101, and then the box cover 3 is covered; then the corresponding inlet and outlet holes 201 are selected as the well positions for the inlet pipe 5 and the outlet pipe 6 according to the well layout plan, and the outlet end of the inlet pipe 5 and the inlet end of the outlet pipe 6 are respectively extended into different inlet and outlet holes 201 through different pipe interfaces 301; then the working medium in the working medium container 4 is input into the inlet and outlet holes 201 through the inlet pipe 5, so that the working medium penetrates into the core 2; then the negative pressure pump 7 is started to generate negative pressure inside the outlet pipe 6, so as to suck out the working medium in the core 2. It can be understood that the working medium sucked out from the core 2 is the working medium that has undergone heat exchange. Finally, by measuring, calculating and analyzing the outlet flow rate and total calorific value of the working medium, and then evaluating the well layout plan, a better well layout plan can be determined.

[0040] The beneficial effects of this embodiment are as follows: multiple inlet and outlet holes are set on the core to simulate multiple well locations, and the connection positions of the inlet pipe and the outlet pipe are selected according to different well layout plans. By measuring, calculating and analyzing data such as the heat and flow rate of the sucked working fluid, it can help researchers to study the impact of different well layout plans on the development process, which is conducive to designing and selecting a better well layout plan.

[0041] Example 2

[0042] This embodiment is a second embodiment of a well layout simulation device for a geothermal heat exchange system. This embodiment is similar to the first embodiment, except that Figures 1 to 3As shown, it also includes a temperature probe 11; the core 2 is provided with a plurality of temperature measuring holes (not shown in the figure), the diameter of the temperature measuring holes is 8 mm, and the hole depth is 50 mm. The box cover 3 is provided with a plurality of through holes (not shown in the figure) connected to the temperature measuring holes. During the heat exchange process, the temperature probe 11 can be regularly used to extend into different temperature measuring holes for temperature measurement, so as to draw a spatiotemporal temperature variation diagram of the core. According to the spatiotemporal temperature variation diagram, the change of the internal temperature of the core 2 with time and space can be intuitively understood, so as to understand the influence of different well layout schemes on the heat exchange process and the temperature of the core 2. At the same time, the risks that may be encountered in the geothermal development process, such as the risk of geological changes such as rock fractures, can also be evaluated according to the temperature variation diagram.

[0043] Furthermore, a waste liquid container 8 is included, and the outlet ends of the liquid outlet pipe 6 are all connected to the waste liquid container 8. The waste liquid container 8 can collect the working fluid output from the liquid outlet pipe 6 to facilitate subsequent processing of the working fluid.

[0044] Furthermore, a temperature sensor 9 and a flow meter 10 are provided on the liquid inlet pipe 5 and the liquid outlet pipe 6. The temperature sensor 9 is used to measure the temperature of the working fluid in real time, and the flow meter 10 is used to measure the flow rate of the working fluid in real time. The temperature sensor 9 and the flow meter 10 are provided to facilitate researchers to obtain the temperature and flow rate data of the working fluid in real time, which can improve the simulation efficiency and is conducive to improving the accuracy of the well layout plan evaluation.

[0045] Furthermore, it also includes a data processing and display module 12, and the temperature sensor 9, the flow meter 10 and the temperature probe 11 are respectively electrically connected to the data processing and display module 12. The data processing and display module 12 is used to receive and process temperature and flow data, and display the data in tables and graphs.

[0046] Furthermore, the pipe interface 301 is provided with internal threads, the liquid inlet pipe 5 and the liquid outlet pipe 6 are provided with external threads, and the liquid inlet pipe 5 and the liquid outlet pipe 6 are respectively threadedly connected to the pipe interface 301. The liquid inlet pipe 5 and the liquid outlet pipe 6 are respectively connected to the pipe interface 301, so that the liquid inlet pipe 5 and the liquid outlet pipe 6 can be kept stable during the process of conveying the working medium, and the liquid inlet pipe 5 and the liquid outlet pipe 6 are prevented from being separated from the core 2.

[0047] Furthermore, combined with Figures 1 to 4As shown, the outlet end of the liquid inlet pipe 5 is provided with a seepage portion 501 for fitting with the inner wall of the liquid inlet and outlet hole 201, and a plurality of first seepage holes 502 are provided on the seepage portion 501; the inlet end of the liquid outlet pipe 6 is provided with a suction portion for fitting with the inner wall of the liquid inlet and outlet hole 201, and a plurality of second seepage holes are provided on the suction portion. After one end of the liquid inlet pipe 5 is inserted into the liquid inlet and outlet hole 201 and fits with the inner wall of the liquid inlet and outlet hole 201, the working fluid can be inserted into the core 2 through the first seepage hole 502. Similarly, after one end of the liquid outlet pipe 6 is inserted into the liquid inlet and outlet hole 201, the working fluid in the core 2 can be sucked out through the second seepage hole. The first seepage hole 502 can improve the infiltration efficiency of the working fluid, and the second seepage hole can improve the suction efficiency of the working fluid. In the actual development process, the same method is often used for geothermal development, so this setting can more realistically restore the actual development process.

[0048] Other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 1.

[0049] Example 3

[0050] This embodiment is a first embodiment of a well layout simulation method for a geothermal heat exchange system, which is applied to the well layout simulation device for a geothermal heat exchange system of Embodiment 2, and includes the following steps:

[0051] S1: Heat the core 2 to the set heat storage temperature, then put the core 2 into the inner cavity 101 and cover the box cover 3;

[0052] S2: Select the corresponding liquid inlet and outlet holes 201 according to the well layout plan, and extend the outlet end of the liquid inlet pipe 5 and the inlet end of the liquid outlet pipe 6 into different liquid inlet and outlet holes 201 through different pipe interfaces 301 respectively;

[0053] S3: The working medium in the working medium container 4 is input into the liquid inlet and outlet holes 201 through the liquid inlet pipe 5; then the pumping rate of the negative pressure pump 7 is set according to the well layout plan, and the working medium in the core 2 is sucked out through the liquid outlet pipe 6;

[0054] S4: Calculate the total heat produced; evaluate the well layout plan based on the total heat produced, the outlet temperature of the working fluid, and the outlet flow rate.

[0055] Furthermore, in step S3 , before the working medium in the working medium container 4 is input into the liquid inlet and outlet hole 201 , the heating component is first started to heat the working medium in the working medium container 4 to a set temperature.

[0056] Furthermore, in step S3, the temperature probe 11 is also used to periodically extend into the temperature measuring hole to measure the temperature; in step S4, a spatiotemporal variation diagram of the core temperature is drawn based on the temperature data measured by the temperature probe 11, and the well layout scheme is selected in combination with the spatiotemporal variation diagram of the core temperature. The spatiotemporal temperature variation diagram can be used to intuitively understand the changes in the temperature inside the core 2 over time and space, thereby understanding the effects of different well layout schemes on the heat exchange process and the temperature of the core 2, so as to select a better well layout scheme. At the same time, the risks that may be encountered in the geothermal development process, such as the risk of geological changes such as rock fractures, can also be evaluated based on the temperature variation diagram.

[0057] Furthermore, in step S4, the total calorific value is calculated as:

[0058] in

[0059] In the formula, Q i is the heat brought out by the working fluid within 5 seconds, KJ; c is the specific heat capacity, KJ / (Kg·K); q i is the outlet volume flow rate, cm 3 / s;T outi is the outlet temperature of the working fluid, K; T ini is the working fluid inlet temperature, K; Q totol It is the total heat taken by the working fluid within 5 seconds.

[0060] The other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 2.

[0061] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description, and it is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A well layout simulation device for a geothermal heat exchange system, characterized in that: The invention comprises a box body (1), a core (2), a box cover (3), a working fluid container (4), at least one liquid inlet pipe (5) and at least one liquid outlet pipe (6), wherein the box body (1) is provided with an inner cavity (101), the core (2) is located in the inner cavity (101), and the core (2) is provided with a plurality of liquid inlet and outlet holes (201); the box cover (3) is detachably connected to the box body (1), the box cover (3) is provided with a plurality of pipeline interfaces (301), and the pipeline interfaces (301) are connected to the liquid inlet and outlet holes (201) in a one-to-one correspondence; the inlet end of each of the liquid inlet pipes (5) is connected to the working fluid container (4), and the outlet end extends into the liquid inlet and outlet holes (201); the inlet end of each of the liquid outlet pipes (6) extends into the liquid inlet and outlet holes (201), and each of the liquid outlet pipes (6) is provided with a negative pressure pump (7).

2. A well layout simulation device for a geothermal heat exchange system according to claim 1, characterized in that: The liquid inlet and outlet holes (201) are distributed in a matrix on the core (2).

3. The well layout simulation device for a geothermal heat exchange system according to claim 1, characterized in that: It also comprises a waste liquid container (8), and the outlet ends of the liquid outlet pipes (6) are connected to the waste liquid container (8).

4. The well layout simulation device for a geothermal heat exchange system according to claim 1, characterized in that: The liquid inlet pipe (5) and the liquid outlet pipe (6) are both provided with a temperature sensor (9) and a flow meter (11).

5. The well layout simulation device for a geothermal heat exchange system according to claim 1, characterized in that: The pipeline interface (301) is provided with internal threads, the liquid inlet pipe (5) and the liquid outlet pipe (6) are provided with external threads, and the liquid inlet pipe (5) and the liquid outlet pipe (6) are respectively threadedly connected to the pipeline interface (301).

6. The well layout simulation device for a geothermal heat exchange system according to claim 1, characterized in that: The outlet end of the liquid inlet pipe (5) is provided with a seepage portion (501), the outer peripheral surface of the seepage portion (501) is in contact with the inner wall of the liquid inlet and outlet hole (201), and the seepage portion (501) is provided with a plurality of first seepage through holes (502); the inlet end of the liquid outlet pipe (6) is provided with a suction portion, the outer peripheral surface of the suction portion is in contact with the inner wall of the liquid inlet and outlet hole (201), and the suction portion is provided with a plurality of second seepage through holes.

7. A well layout simulation device for a geothermal heat exchange system according to any one of claims 1 to 6, characterized in that: It also includes a temperature probe (11); the core is provided with a plurality of temperature measuring holes, and the box cover is provided with a plurality of through holes connected to the temperature measuring holes.

8. A method for simulating well layout of a geothermal heat exchange system, applied to a device for simulating well layout of a geothermal heat exchange system according to claim 7, characterized in that: The following steps are involved: S1: firstly heat the core (2) to a set heat storage temperature, then place the core (2) into the inner cavity (101), and cover the box cover (3); S2: selecting the liquid inlet and outlet holes (201) at corresponding positions according to the well layout plan, and passing the outlet end of the liquid inlet pipe (5) and the inlet end of the liquid outlet pipe (6) through different pipe interfaces (301) and extending into different liquid inlet and outlet holes (201); S3: The working fluid in the working fluid container (4) is input into the liquid inlet and outlet holes (201) through the liquid inlet pipe (5); then the pumping rate of the negative pressure pump (7) is set according to the well layout plan, and the working fluid in the core (2) is sucked out through the liquid outlet pipe (6); S4: Calculate the total heat produced; and evaluate the well layout plan based on the total heat produced, the outlet temperature of the working fluid, and the outlet flow rate.

9. A method for simulating well layout of a geothermal heat exchange system according to claim 8, characterized in that: In step S3, a temperature probe (11) is also used to periodically extend into the temperature measuring hole to measure the temperature; in step S4, a core temperature spatiotemporal variation diagram is drawn based on the temperature data measured by the temperature probe (11), and a well layout plan is selected based on the core temperature spatiotemporal variation diagram.

10. The method for simulating well layout of a geothermal heat exchange system according to claim 8, characterized in that: In step S4, the total calorific value is calculated as: in In the formula, Q i is the heat brought out by the working fluid within 5 seconds, KJ; c is the specific heat capacity, KJ / (Kg·K); q i is the outlet volume flow rate, cm 3 / s;T outi is the outlet temperature of the working fluid, K; T ini is the working fluid inlet temperature, K; Q totol It is the total heat taken by the working fluid within 5 seconds.

Images