Geothermal tail water recharge blockage simulation device

Abstract

The invention provides a geothermal tail water recharge blockage simulation device, which comprises a constant-temperature heater used for heating an underlying stratum, conducting the heated heat to a geothermal reservoir through the underlying stratum, isolating the heat through a geothermal cover layer, and adjusting a simulated geothermal reservoir at a target temperature; the pumping well is used for pumping geothermal water from the simulated geothermal reservoir to the water storage tank; the water mixing tank is used for pre-configuring target geothermal water corresponding to the simulated geothermal reservoir; the water injection well is used for injecting target geothermal water into the simulated geothermal reservoir; and the calculation module is used for calculating the geothermal tail water recharge blockage degree based on the water pumping pressure, the water pumping flow, the water injection pressure and the water injection flow monitored by the pressure gauges and the flowmeters mounted on the pipelines of the water pumping well and the water injection well, and pressure data monitored by the pressure sensors arranged in the simulated geothermal reservoir. Therefore, accurate simulation of the actual blocking condition during geothermal tail water recharge is achieved, and blocking during geothermal tail water recharge is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of geothermal tail water reinjection, and in particular to a geothermal tail water reinjection blockage simulation device. Background Art

[0002] Geothermal resources are buried deep in the earth. Usually, geothermal wells are drilled to extract geothermal water to bring geothermal energy to the surface for use. At present, geothermal resources have been widely used in heating, bathing, breeding and other fields, and the amount of geothermal water extraction has also increased. The groundwater level has dropped in some areas, and the discharge of geothermal water to the surface will also cause environmental pollution and waste of resources. Therefore, in order to ensure the clean and sustainable development and utilization of geothermal resources, the geothermal tail water must be recharged to the underground mining layer after use. Since the geothermal reservoir is buried deep underground, it is impossible to directly observe and study the blockage.

[0003] In the related technology, single-factor blockage analysis is usually performed. However, due to the complex blockage mechanism of geothermal reservoirs and the superposition of different blockage factors, single-factor blockage analysis cannot reflect the actual situation. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent.

[0005] To this end, the first object of the present invention is to provide a geothermal tailwater reinjection blockage simulation device, comprising: an underlying stratum, a geothermal reservoir, a geothermal cap layer, a constant temperature heater, a pumping well and an injection well, a mixing tank, a water storage tank, a pressure gauge, a flow meter, a pressure sensor, and a computing module, wherein:

[0006] The constant temperature heater is used to heat the underlying stratum, conduct the heated heat to the geothermal reservoir through the underlying stratum, and isolate the heat through the geothermal cover layer to adjust the simulated geothermal reservoir to a target temperature;

[0007] The pumping well is used to extract geothermal water from the simulated geothermal reservoir into a water storage tank;

[0008] The mixing tank is used to pre-configure the target geothermal water corresponding to the simulated geothermal reservoir, wherein the target geothermal water is obtained by mixing and stirring clean water, suspended matter, microorganisms, and water chemical components;

[0009] The water injection well is used to inject the target geothermal water into the simulated geothermal reservoir;

[0010] The pressure meter and flow meter are respectively installed on the pipelines of the pumping well and the injection well to monitor the pumping pressure and pumping flow of the pumping well and the injection pressure and injection flow of the injection well;

[0011] The pressure sensor is arranged in the simulated geothermal reservoir and is used to monitor the pressure data of the simulated geothermal reservoir;

[0012] The calculation module is used to obtain the pumping pressure, pumping flow, injection pressure, injection flow and pressure data to calculate the blockage degree of geothermal tail water reinjection.

[0013] In one embodiment of the present invention, the geothermal tailwater reinjection blockage simulation device further comprises: a device wall and an insulation board;

[0014] The device wall is used to support the underlying strata, geothermal reservoirs, and geothermal cap layers;

[0015] The insulation panels are installed inside the walls of the device to maintain the temperature of the geothermal reservoir.

[0016] In one embodiment of the present invention, the geothermal tailwater reinjection blockage simulation device further comprises: a thermometer;

[0017] The thermometer is installed on the pipelines of the pumping well and the injection well, and is used to monitor the pumping temperature of the pumping well and the injection temperature of the injection well.

[0018] In one embodiment of the present invention, the geothermal tailwater reinjection blockage simulation device further comprises: a clean water tank;

[0019] The clean water tank is connected to the mixing water tank and is used to transport clean water to the mixing water tank;

[0020] Wherein, a first valve is provided at the outlet of the clean water tank for controlling the delivery of clean water.

[0021] In one embodiment of the present invention, the geothermal tailwater reinjection blockage simulation device further comprises: a suspended matter configuration box;

[0022] The suspended matter configuration box is connected to the water mixing tank and is used to configure the suspended matter corresponding to the simulated geothermal reservoir and transport it to the water mixing tank.

[0023] In one embodiment of the present invention, a second valve is provided at the outlet of the suspended matter configuration box for controlling the amount of the selected suspended matter.

[0024] In one embodiment of the present invention, the geothermal tailwater reinjection blockage simulation device further comprises: a microorganism configuration box;

[0025] The microorganism configuration box is connected to the water mixing tank and is used to configure microorganisms corresponding to the simulated geothermal reservoir and transport them to the water mixing tank.

[0026] In one embodiment of the present invention, a third valve is provided at the outlet of the microorganism configuration box for controlling the number of microorganisms.

[0027] In one embodiment of the present invention, the geothermal tailwater reinjection blockage simulation device further comprises: a chemical composition configuration box;

[0028] The chemical composition configuration box is connected to the water mixing tank and is used to configure the water chemical components of geothermal water corresponding to the simulated geothermal reservoir and transport them to the water mixing tank;

[0029] Wherein, a fourth valve is provided at the outlet of the chemical component configuration box for conveying water chemical components.

[0030] In one embodiment of the present invention, the chemical composition configuration box is also used to add a blocking remover and / or a blocking inhibitor to simulate a blocking inhibition condition.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0033] Figure 1 A schematic diagram of the structure of a geothermal tailwater reinjection blockage simulation device provided by an embodiment of the present invention;

[0034] Figure 2 A schematic plan view of the structure of a geothermal tailwater reinjection blockage simulation device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following describes a geothermal tailwater reinjection blockage simulation device according to an embodiment of the present invention with reference to the accompanying drawings.

[0037] Figure 1 The schematic diagram of the structure of a geothermal tailwater reinjection blockage simulation device provided by an embodiment of the present invention. Figure 1 As shown, the geothermal tail water reinjection blockage simulation device includes: an underlying stratum 10, a geothermal reservoir 11, a geothermal cover layer 12, a constant temperature heater 13, a pumping well 14 and an injection well 15, a mixing tank 16, a water storage tank 17, a pressure gauge 18, a flow meter 19, a pressure sensor 20, and a computing module (not shown in the figure).

[0038] The constant temperature heater 13 is used to heat the underlying stratum 10, conduct the heated heat to the geothermal reservoir 11 through the underlying stratum 10, and isolate the heat through the geothermal cover layer 12, so as to adjust the simulated geothermal reservoir 11 to a target temperature;

[0039] In some embodiments, the constant temperature heater 13 can adjust the temperature and keep it constant to simulate the blockage of the geothermal reservoir 11 at different temperatures, so as to facilitate the study of the impact of temperature changes on various blockage factors.

[0040] Further, taking the geothermal reservoir 11 of the heating geothermal resource as an example, the target temperature may be the heating temperature, but is not limited thereto.

[0041] A pumping well 14 is used to extract geothermal water from the simulated geothermal reservoir 11 to a water storage tank 17;

[0042] Optionally, the number of the pumping wells 14 may be one or more, and the number of the pumping wells 14 may be determined by the capacity of the geothermal water, but is not limited thereto.

[0043] Specifically, if Figure 1 As shown, the pumping well 14 can extract geothermal water from the simulated geothermal reservoir 11 to the water storage tank 17 through the pumping pump 21 .

[0044] Optionally, the water storage tank 17 is used to store geothermal water extracted from the simulated geothermal reservoir 11 .

[0045] A water mixing tank 16 is used to pre-configure target geothermal water corresponding to the simulated geothermal reservoir 11, wherein the target geothermal water is obtained by mixing and stirring clean water, suspended matter, microorganisms, and water chemical components;

[0046] An injection well 15, used to inject target geothermal water into the simulated geothermal reservoir 11;

[0047] Optionally, the water injection well 15 may be one or more wells, and the number of the water injection wells 15 may be determined by the capacity of the target geothermal water, but is not limited thereto.

[0048] Specifically, if Figure 1 As shown, the water injection well 15 can inject the target geothermal water into the simulated geothermal reservoir 11 through the water injection pump 22 .

[0049] The pressure meter 18 and the flow meter 19 are respectively installed on the pipelines of the pumping well 14 and the injection well 15, and are used to monitor the pumping pressure and pumping flow of the pumping well 14, and the injection pressure and injection flow of the injection well 15;

[0050] Optionally, the flow meter 19 may be installed close to the pumping well 14 and the injection well 15, and the pressure gauge 18 may be installed close to the water storage tank 17 and the mixing tank 16, but is not limited thereto.

[0051] The pressure sensor 20 is arranged in the simulated geothermal reservoir 11 and is used to monitor the pressure data of the simulated geothermal reservoir 11;

[0052] Optionally, the pressure sensors 20 may be evenly arranged in the simulated geothermal reservoir 11 , but not limited thereto.

[0053] The calculation module is used to obtain the pumping pressure, pumping flow, injection pressure, injection flow and pressure data to calculate the blockage degree of geothermal tail water reinjection.

[0054] Optionally, the computing module may be a data processing device such as a computer device, but is not limited thereto.

[0055] Furthermore, when the computing module is a computer device, the pumping pressure, pumping flow, injection pressure, injection flow and pressure data can be obtained through the network to analyze the blockage degree of geothermal tail water reinjection, but it is not limited to this.

[0056] In the embodiment of the present invention, Figure 1 As shown, the geothermal tailwater reinjection blockage simulation device also includes: a device wall 23 and an insulation board 24;

[0057] The device wall 23 is used to support the underlying stratum 10, the geothermal reservoir 11, and the geothermal cover 12;

[0058] Insulation panels 24 are installed inside the device wall 23 to maintain the temperature of the geothermal reservoir 11 .

[0059] In some embodiments, the device wall 23 may be rectangular. Specifically, the present invention also provides a schematic diagram of a planar structure of a geothermal tailwater reinjection blockage simulation device, as shown in FIG. Figure 2 As shown, in the case where the device wall 23 can be a rectangular device wall, the insulation board 24 is installed inside the four sides of the rectangular device wall, the pumping well 14 and the injection well 15 are located in the middle of the rectangular device wall, and the pressure sensors 20 are evenly arranged in the simulated geothermal reservoir 11 in the rectangular device wall.

[0060] The constant temperature heater 13 may be located below the device wall 23 .

[0061] In the embodiment of the present invention, Figure 1 As shown, the geothermal tailwater reinjection blockage simulation device also includes: a thermometer 25;

[0062] The thermometer 25 is installed on the pipes of the pumping well 14 and the injection well 15 to monitor the pumping temperature of the pumping well 14 and the injection temperature of the injection well 15 .

[0063] Optionally, the target temperature of the simulated geothermal reservoir 11 is monitored in real time by the pumping temperature of the pumping well 14 and the injection temperature of the injection well 15 .

[0064] In the embodiment of the present invention, Figure 1 As shown, the geothermal tailwater reinjection blockage simulation device also includes: a clean water tank 26;

[0065] The clean water tank 26 is connected to the mixing water tank 16 and is used to deliver clean water to the mixing water tank 16;

[0066] A first valve 27 is provided at the outlet of the clean water tank 26 for controlling the delivery of clean water.

[0067] In the embodiment of the present invention, Figure 1 As shown, the geothermal tailwater reinjection blockage simulation device also includes: a suspended matter configuration box 28;

[0068] The suspended matter configuration box 28 is connected to the water mixing tank 16 , and is used to configure the suspended matter corresponding to the simulated geothermal reservoir 11 , and transport it to the water mixing tank 16 .

[0069] Optionally, the suspended matter configuration box 28 can be configured with suspended matter of different components, suspended matter of different particle sizes, and suspended matter of different gradations, and simulate the suspended matter corresponding to the simulated geothermal reservoir 11 according to the suspended matter of geothermal water in the water storage tank 17 .

[0070] In the embodiment of the present invention, Figure 1 As shown, a second valve 29 is provided at the outlet of the suspended matter configuration box 28 for controlling the amount of the selected suspended matter.

[0071] In the embodiment of the present invention, Figure 1 As shown, the geothermal tailwater reinjection blockage simulation device also includes: a microorganism configuration box 30;

[0072] The microorganism configuration box 30 is connected to the water mixing tank 16 and is used to configure microorganisms corresponding to the simulated geothermal reservoir 11 and transport them to the water mixing tank 16 .

[0073] Optionally, the microorganism configuration box 30 can be configured with different microorganisms, or multiple microorganisms can be mixed at the same time, and the microorganisms corresponding to the simulated geothermal reservoir 11 can be simulated according to the microorganisms in the geothermal water in the water storage tank 17 .

[0074] In the embodiment of the present invention, Figure 1 As shown, a third valve 31 is provided at the outlet of the microorganism configuration box 30 for controlling the number of microorganisms.

[0075] In the embodiment of the present invention, Figure 1 As shown, the geothermal tailwater reinjection blockage simulation device also includes: a chemical composition configuration box 32;

[0076] The chemical composition configuration box 32 is connected to the water mixing tank 16 and is used to configure the water chemical components of the geothermal water corresponding to the simulated geothermal reservoir 11 and transport it to the water mixing tank 16;

[0077] Wherein, a fourth valve 33 is provided at the outlet of the chemical component configuration box 32 for conveying water chemical components.

[0078] Optionally, the chemical composition configuration box 32 can be configured with geothermal water of different chemical components, and special chemicals can also be added as needed to simulate the chemical composition of the actual geothermal water corresponding to the simulated geothermal reservoir 11, so that the water chemical composition is the same as the actual one.

[0079] In the embodiment of the present invention, the chemical composition configuration box 32 is also used to add a blocking remover and / or a blocking inhibitor to simulate a blocking inhibition condition.

[0080] In this embodiment, the constant temperature heater in the device is used to heat the underlying stratum, conduct the heated heat to the geothermal reservoir through the underlying stratum, and isolate the heat through the geothermal cover layer to adjust the simulated geothermal reservoir to the target temperature; the pumping well is used to extract geothermal water from the simulated geothermal reservoir to the water storage tank; the mixing tank is used to pre-configure the target geothermal water corresponding to the simulated geothermal reservoir; the injection well is used to inject the target geothermal water into the simulated geothermal reservoir; the calculation module is used to calculate the degree of blockage of geothermal tail water reinjection based on the pumping pressure, pumping flow, injection pressure, injection flow monitored by the pressure gauge and flow meter installed on the pumping well and injection well pipelines, and the pressure data monitored by the pressure sensor arranged in the simulated geothermal reservoir. In this way, an accurate simulation of the actual blockage during geothermal tail water reinjection is achieved to avoid blockage of geothermal tail water reinjection.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0086] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0087] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A geothermal tailwater reinjection blockage simulation device, characterized in that: include: Underlying formation, geothermal reservoir, geothermal cover, constant temperature heater, pumping well and injection well, mixing tank, water storage tank, pressure gauge, flow meter, pressure sensor, computing module, wherein: The constant temperature heater is used to heat the underlying stratum, conduct the heated heat to the geothermal reservoir through the underlying stratum, and isolate the heat through the geothermal cover layer to adjust the simulated geothermal reservoir to a target temperature; The pumping well is used to extract geothermal water from the simulated geothermal reservoir into a water storage tank; The mixing tank is used to pre-configure the target geothermal water corresponding to the simulated geothermal reservoir, wherein the target geothermal water is obtained by mixing and stirring clean water, suspended matter, microorganisms, and water chemical components; The water injection well is used to inject the target geothermal water into the simulated geothermal reservoir; The pressure meter and flow meter are respectively installed on the pipelines of the pumping well and the injection well to monitor the pumping pressure and pumping flow of the pumping well and the injection pressure and injection flow of the injection well; The pressure sensor is arranged in the simulated geothermal reservoir and is used to monitor the pressure data of the simulated geothermal reservoir; The calculation module is used to obtain the pumping pressure, pumping flow, injection pressure, injection flow and pressure data to calculate the blockage degree of geothermal tail water reinjection.

2. The geothermal tailwater reinjection blockage simulation device according to claim 1, characterized in that: The geothermal tailwater reinjection blockage simulation device also includes: a device wall and an insulation board; The device wall is used to support the underlying strata, geothermal reservoirs, and geothermal cap layers; The insulation panels are installed inside the walls of the device to maintain the temperature of the geothermal reservoir.

3. The geothermal tailwater reinjection blockage simulation device according to claim 1, characterized in that: The geothermal tailwater reinjection blockage simulation device further includes: a thermometer; The thermometer is installed on the pipelines of the pumping well and the injection well, and is used to monitor the pumping temperature of the pumping well and the injection temperature of the injection well.

4. The geothermal tailwater reinjection blockage simulation device according to claim 1, characterized in that: The geothermal tailwater reinjection blockage simulation device also includes: a clean water tank; The clean water tank is connected to the mixing water tank and is used to transport clean water to the mixing water tank; Wherein, a first valve is provided at the outlet of the clean water tank for controlling the delivery of clean water.

5. The geothermal tailwater reinjection blockage simulation device according to claim 1, characterized in that: The geothermal tailwater reinjection blockage simulation device also includes: a suspended matter configuration box; The suspended matter configuration box is connected to the water mixing tank and is used to configure the suspended matter corresponding to the simulated geothermal reservoir and transport it to the water mixing tank.

6. The geothermal tailwater reinjection blockage simulation device according to claim 5, characterized in that: A second valve is provided at the outlet of the suspended matter configuration box for controlling the amount of the selected suspended matter.

7. The geothermal tailwater reinjection blockage simulation device according to claim 1, characterized in that: The geothermal tailwater reinjection blockage simulation device also includes: a microbial configuration box; The microorganism configuration box is connected to the water mixing tank and is used to configure microorganisms corresponding to the simulated geothermal reservoir and transport them to the water mixing tank.

8. The geothermal tailwater reinjection blockage simulation device according to claim 7, characterized in that: A third valve is provided at the outlet of the microorganism configuration box for controlling the number of microorganisms.

9. The geothermal tailwater reinjection blockage simulation device according to claim 1, characterized in that: The geothermal tailwater reinjection blockage simulation device also includes: a chemical composition configuration box; The chemical composition configuration box is connected to the water mixing tank and is used to configure the water chemical components of geothermal water corresponding to the simulated geothermal reservoir and transport them to the water mixing tank; Wherein, a fourth valve is provided at the outlet of the chemical component configuration box for conveying water chemical components.

10. The geothermal tailwater reinjection blockage simulation device according to claim 9, characterized in that: The chemical composition configuration box is also used to add a blocking remover and / or a blocking inhibitor to simulate a blocking inhibition condition.

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