Geothermal resource quantity calculation method and device and medium

Abstract

The invention provides a geothermal resource quantity calculation method and device and a medium, and relates to the technical field of geothermal resource exploration and development, and the method comprises the steps: building a three-dimensional structure model of a research area; establishing a porosity model, a density model and a specific heat capacity model of the research area based on the three-dimensional structure model and the porosity data, the density data and the specific heat capacity data of the research area; establishing a three-dimensional temperature field of the research area based on the three-dimensional structure model and the heat flow data of the research area; and calculating the geothermal resource quantity of the research area based on the porosity model, the density model, the specific heat capacity model and the three-dimensional temperature field. Therefore, the geothermal resource quantity of the research area can be obtained, the accuracy of the geothermal resource quantity is improved, meanwhile, the geothermal resource quantity of the research area and any range is calculated, the method can be widely applied to geothermal resource potential evaluation of geologic bodies, and exploration and development of geothermal resources are effectively supported.

Description

Technical Field

[0001] This invention relates to the field of geothermal resource exploration and development technology, and more specifically, to a method, apparatus and medium for calculating geothermal resource quantity. Background Technology

[0002] Currently, geothermal energy is a clean and environmentally friendly non-fossil energy source, characterized by its wide distribution, safety, stability (unaffected by seasons, climate, and diurnal variations), high utilization rate, and low operating costs, indicating its enormous resource potential. Therefore, calculating the resource volume of geothermal energy is particularly necessary.

[0003] Existing technologies typically employ methods such as heat flux statistics, geothermal reservoir volume analysis, analogy, numerical simulation, analytical methods, and statistical analysis. However, these methods cannot accurately measure geothermal resources within an arbitrary range.

[0004] To address the problems of existing technologies, this invention provides a method, apparatus, and medium for calculating geothermal resources. Summary of the Invention

[0005] To address the problems of existing technologies, this invention provides a method, apparatus, and medium for calculating geothermal resources. The method includes:

[0006] Establish a three-dimensional structural model of the study area;

[0007] Based on the three-dimensional structural model, the porosity data, density data, and specific heat capacity data of the study area, a porosity model, a density model, and a specific heat capacity model of the study area are established.

[0008] Based on the three-dimensional structural model and the heat flow data of the study area, a three-dimensional temperature field of the study area is established.

[0009] Based on the porosity model, the density model, the specific heat capacity model, and the three-dimensional temperature field, the geothermal resources of the study area are calculated.

[0010] According to an embodiment of the present invention, the three-dimensional structural model is established through the following steps:

[0011] Based on the drilling, geological, and seismic data of the study area, the boundaries and stratigraphic levels of the study area are obtained.

[0012] Based on the boundary and the stratigraphic level, a three-dimensional geological framework for the study area is established;

[0013] Based on the aforementioned three-dimensional geological framework, the three-dimensional structural model is established.

[0014] According to an embodiment of the present invention, the three-dimensional structural model is established through the following steps:

[0015] Based on the aforementioned three-dimensional geological framework, geological bodies and strata of the study area are established, and meshing is performed to create the three-dimensional structural model composed of multiple mesh units.

[0016] According to an embodiment of the present invention, the porosity model, the density model, and the specific heat capacity model are established through the following steps:

[0017] Based on the porosity data, density data, and specific heat capacity data, values ​​are assigned to the three-dimensional structural model, and spatial interpolation is performed to establish the porosity model, the density model, and the specific heat capacity model.

[0018] According to an embodiment of the present invention, the three-dimensional temperature field is established through the following steps:

[0019] Based on the three-dimensional structural model and the heat flow data, the geothermal heat flow field of the study area is established;

[0020] Based on the geothermal flow field and the thermal conductivity of the strata in the study area, a temperature increment model for the study area is established.

[0021] The three-dimensional temperature field is obtained by adding the surface temperature of the study area to the summation result of the temperature increment model.

[0022] According to an embodiment of the present invention, the temperature increment model is established through the following steps:

[0023] Divide the geothermal flow field by the thermal conductivity of the strata to obtain the geothermal gradient;

[0024] Based on the geothermal gradient and the three-dimensional structural model, the temperature increment model is established.

[0025] According to an embodiment of the present invention, the amount of geothermal resources is calculated through the following steps:

[0026] Based on the three-dimensional temperature field, the porosity model, the density model, the specific heat capacity model, and the volume of each of the thermal reservoirs in the study area, the first geothermal resource quantity and the second geothermal resource quantity corresponding to the thermal reservoir rocks and geothermal fluids in the study area are calculated respectively.

[0027] The geothermal resource quantity is obtained by summing the first geothermal resource quantity and the second geothermal resource quantity.

[0028] According to an embodiment of the present invention, the first geothermal resource quantity is determined by the following steps:

[0029] Based on the porosity model, the density model, and the specific heat capacity model, the first porosity, the first density, and the first specific heat capacity of the thermal reservoir rock in each layer are obtained respectively.

[0030] The difference between the preset value and the first porosity is determined as the second porosity;

[0031] The difference between the three-dimensional temperature field and the reference temperature is determined as the first target temperature;

[0032] The first geothermal resource quantity is obtained by summing the results of multiplying the volume by the first density, the first specific heat capacity, the second porosity, and the first target temperature.

[0033] According to one embodiment of the present invention, the second geothermal resource quantity is determined by the following steps:

[0034] Based on the density model and the specific heat capacity model, the second density and the second specific heat capacity of the geothermal fluid in each layer are obtained respectively.

[0035] The second geothermal resource quantity is obtained by summing the results of multiplying the volume by the second density, the second specific heat capacity, the first porosity, and the first target temperature.

[0036] According to one embodiment of the present invention, the volume is the product of the area of ​​each of the layers in the study area and the average thickness of the thermal reservoir in each of the layers.

[0037] According to another aspect of the invention, a storage medium is also provided, comprising a series of instructions for performing the steps of the method as described in any of the preceding claims.

[0038] According to another aspect of the present invention, a geothermal resource quantity calculation apparatus is also provided, which performs the method as described in any of the preceding claims, the apparatus comprising:

[0039] The first module is used to create a three-dimensional structural model of the study area;

[0040] The second module is used to establish a porosity model, density model, and specific heat capacity model of the study area based on the three-dimensional structural model, porosity data, density data, and specific heat capacity data of the study area.

[0041] The third module is used to establish the three-dimensional temperature field of the study area based on the three-dimensional construction model and the heat flow data of the study area.

[0042] The calculation module is used to calculate the geothermal resources of the study area based on the porosity model, the density model, the specific heat capacity model, and the three-dimensional temperature field.

[0043] This invention provides a method, apparatus, and medium for calculating geothermal resources, which has the following advantages compared with the prior art:

[0044] This invention first establishes a three-dimensional structural model of the study area. Then, based on the three-dimensional structural model, porosity data, density data, specific heat capacity data, and heat flow data, corresponding porosity models, density models, specific heat capacity models, and a three-dimensional temperature field are established. Finally, based on the porosity model, density model, specific heat capacity model, and three-dimensional temperature field, the geothermal resource quantity of the study area is calculated. This method improves the accuracy of geothermal resource calculation and enables the calculation of geothermal resources within the study area and any other region. It can be widely applied to the evaluation of geothermal resource potential in geological bodies, effectively supporting the exploration and development of geothermal resources.

[0045] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0047] Figure 1 A flowchart of a method for calculating geothermal resources according to an embodiment of the present invention is shown;

[0048] Figure 2 A schematic diagram of a three-dimensional construction model according to an embodiment of the present invention is shown;

[0049] Figure 3 A schematic diagram of a porosity model according to an embodiment of the present invention is shown;

[0050] Figure 4 A schematic diagram of a specific heat capacity model according to an embodiment of the present invention is shown;

[0051] Figure 5 A schematic diagram of a density model according to an embodiment of the present invention is shown;

[0052] Figure 6 A schematic diagram of a geothermal flow field according to an embodiment of the present invention is shown;

[0053] Figure 7 A schematic diagram of a three-dimensional temperature field according to an embodiment of the present invention is shown;

[0054] Figure 8 A schematic diagram showing the amount of geothermal resources according to an embodiment of the present invention is shown;

[0055] Figure 9 A block diagram of a geothermal resource calculation device according to an embodiment of the present invention is shown.

[0056] In the accompanying drawings, the same parts use the same reference numerals. Also, the drawings are not drawn to scale. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0058] To address the aforementioned shortcomings of existing technologies, this invention provides a method, apparatus, and medium for calculating geothermal resources. Figure 1 A flowchart of a method for calculating geothermal resources according to an embodiment of the present invention is shown. The method includes:

[0059] S101, Establish a three-dimensional structural model of the study area;

[0060] S102. Based on the three-dimensional structural model, porosity data, density data, and specific heat capacity data of the study area, a porosity model, density model, and specific heat capacity model of the study area are established.

[0061] S103, based on the three-dimensional structural model and the heat flow data of the study area, establishes the three-dimensional temperature field of the study area;

[0062] S104 calculates the geothermal resources in the study area based on the porosity model, density model, specific heat capacity model, and three-dimensional temperature field.

[0063] For example, the study area can be an oilfield area, and this invention can be applied to oilfield areas. Furthermore, a three-dimensional temperature field of the study area can be established based on a three-dimensional structural model, heat flow data of the study area, formation thermal conductivity, and surface temperature.

[0064] This invention first establishes a three-dimensional structural model of the study area. Then, based on the three-dimensional structural model, porosity data, density data, specific heat capacity data, and heat flow data, corresponding porosity models, density models, specific heat capacity models, and a three-dimensional temperature field are established. Finally, based on the porosity model, density model, specific heat capacity model, and three-dimensional temperature field, the geothermal resource quantity of the study area is calculated. This method improves the accuracy of geothermal resource calculation and enables the calculation of geothermal resources within the study area and any other region. It can be widely applied to the evaluation of geothermal resource potential in geological bodies, effectively supporting the exploration and development of geothermal resources.

[0065] In one possible embodiment, a three-dimensional construction model is established through the following steps:

[0066] Based on drilling, geological, and seismic data of the study area, the boundaries and stratigraphic levels of the study area are obtained.

[0067] A three-dimensional geological framework for the study area was established based on the boundaries and stratigraphic levels.

[0068] A three-dimensional structural model was established based on a three-dimensional geological framework.

[0069] Among them, drilling data can be drilling coordinates; geological data can be geological stratification, tectonic unit division, top surface structure, and fault distribution; and seismic data can be seismic profiles. In this way, accurate boundaries and stratigraphic levels can be obtained based on data such as drilling coordinates, geological stratification, tectonic unit division, top surface structure, fault distribution, and seismic profiles.

[0070] Next, based on the boundaries and stratigraphic levels, a three-dimensional geological framework is established to create a three-dimensional structural model, such as... Figure 2 As shown.

[0071] In this way, a three-dimensional structural model was established, and the established three-dimensional structural model was matched with the study area, providing a basis for the establishment of porosity model, density model, specific heat capacity model and three-dimensional temperature field.

[0072] In one possible embodiment, a three-dimensional construction model is established through the following steps:

[0073] Based on a three-dimensional geological framework, geological bodies and strata of the study area are established, and grid subdivision is performed to create a three-dimensional structural model composed of multiple grid units.

[0074] This allows for the creation of a three-dimensional construction model and improves its accuracy.

[0075] In one possible embodiment, the porosity model, density model, and specific heat capacity model are established through the following steps:

[0076] Based on porosity data, density data, and specific heat capacity data, values ​​are assigned to the three-dimensional structural model, and spatial interpolation is performed to establish the porosity model, density model, and specific heat capacity model.

[0077] For example, porosity data, density data, and specific heat capacity data can correspond to different stratigraphic units, different lithologies, and different depths in the study area. Specifically, porosity data, density data, and specific heat capacity data can be obtained from well logging interpretation data and measured data, respectively. Furthermore, the porosity model, density model, and specific heat capacity model can be three-dimensional models.

[0078] Next, porosity, density, and specific heat capacity data are assigned to the mesh cells of the 3D structural model based on information such as stratigraphic position and depth. Then, spatial interpolation is performed to obtain the corresponding porosity model (e.g., ...). Figure 3 As shown), density model (such as) Figure 5 (as shown) and specific heat capacity model (such as) Figure 4 (As shown).

[0079] This enabled the establishment of porosity, density, and specific heat capacity models, providing a basis for calculating geothermal resources.

[0080] In one possible embodiment, a three-dimensional temperature field is established through the following steps:

[0081] Based on the three-dimensional structural model and heat flow data, the geothermal heat flow field of the study area was established.

[0082] Based on the geothermal flow field and the thermal conductivity of the strata in the study area, a temperature increment model for the study area is established.

[0083] The surface temperature of the study area is summed with the results of the cumulative summation of the temperature increment model to obtain the three-dimensional temperature field.

[0084] This involves assigning heat flow data to a three-dimensional construction model to obtain the geothermal heat flow field, such as... Figure 6 As shown, next, based on the geothermal flow field and the thermal conductivity of the strata, a temperature increment model ΔT is established. Then, as shown in Equation 1, the three-dimensional temperature field T is obtained (e.g., Figure 7 As shown):

[0085] T = T s +∑ΔT Equation 1

[0086] Where T refers to the three-dimensional temperature field; T s ΔT refers to surface temperature; ΔT refers to the temperature increment model.

[0087] This enabled the establishment of a three-dimensional temperature field, providing a basis for calculating geothermal resources.

[0088] In one possible embodiment, the temperature increment model is established through the following steps:

[0089] Dividing the geothermal flow field by the thermal conductivity of the strata yields the geothermal gradient.

[0090] A temperature increment model is established based on the geothermal gradient and three-dimensional structural model.

[0091] For example, the geothermal gradient can be obtained as shown in Equation 2:

[0092] dT / dZ=q / K Formula 2

[0093] Where dT / dZ refers to the geothermal gradient; q refers to the geothermal flow field; and K refers to the thermal conductivity of the strata.

[0094] Then, based on the geothermal gradient, the temperature increment per unit height can be obtained. Subsequently, the temperature increment is used to assign values ​​to the three-dimensional structural model to establish a temperature increment model.

[0095] This enabled the establishment of a temperature increment model, providing a basis for the establishment of a three-dimensional temperature field.

[0096] In one possible embodiment, the amount of geothermal resources is calculated through the following steps:

[0097] Based on the three-dimensional temperature field, porosity model, density model, specific heat capacity model, and the volume of each layer of thermal reservoir in the study area, the first geothermal resource quantity and the second geothermal resource quantity corresponding to the thermal reservoir rocks and geothermal fluids in the study area are calculated respectively.

[0098] The geothermal resource quantity is obtained by summing the first geothermal resource quantity and the second geothermal resource quantity.

[0099] For example, the geothermal fluid can be water.

[0100] Based on the three-dimensional temperature field, porosity model, density model, specific heat capacity model, and volume, the primary geothermal resource Q of the reservoir rocks in the study area can be calculated. r The second geothermal resource quantity Q of geothermal fluids w .

[0101] Then, as shown in Equation 3, the geothermal resource quantity is obtained as follows: Figure 8 As shown:

[0102] Q = Q r +Q w Formula 3

[0103] Where Q refers to the amount of geothermal resources, Q r Q refers to the primary geothermal resource quantity; w This refers to the second geothermal resource volume.

[0104] This allows for the calculation of geothermal resources in the study area, improving the accuracy of geothermal resource measurements.

[0105] In one possible embodiment, the first geothermal resource quantity is determined through the following steps:

[0106] Based on the porosity model, density model, and specific heat capacity model, the first porosity, first density, and first specific heat capacity of the thermal reservoir rock in each layer are obtained respectively.

[0107] The difference between the preset value and the first porosity is determined as the second porosity;

[0108] The difference between the three-dimensional temperature field and the reference temperature is determined as the first target temperature;

[0109] The first geothermal resource quantity is obtained by summing the results of multiplying the volume by the first density, the first specific heat capacity, the second porosity, and the first target temperature.

[0110] For example, the preset value can be 1. The reference temperature can be the annual average temperature of the study area. After obtaining the first porosity, first density, and first specific heat capacity, the first geothermal resource quantity can be obtained by substituting them into Equation 4:

[0111]

[0112] Among them, Q r Refers to the primary geothermal resource quantity; V i Refers to volume; ρ i,r The first density; C i,r Refers to the first specific heat capacity; The first porosity; T i T0 refers to the thermal reservoir temperature of each layer in the three-dimensional temperature field; T0 refers to the reference temperature; and i refers to the layer.

[0113] This allows for the calculation of the first geothermal resource quantity, improving its accuracy and providing a basis for the calculation of geothermal resources.

[0114] In one possible embodiment, the second geothermal resource quantity is determined through the following steps:

[0115] Based on the density model and the specific heat capacity model, the second density and the second specific heat capacity of the geothermal fluid in each layer are obtained respectively.

[0116] The second geothermal resource quantity is obtained by summing the results of multiplying the volume by the second density, the second specific heat capacity, the first porosity, and the first target temperature.

[0117] After obtaining the second density and the second specific heat capacity, we can substitute them into Equation 5 to obtain the second geothermal resource quantity:

[0118]

[0119] Among them, Q w Refers to the second geothermal resource volume; V i Refers to volume; ρ i,w The second density; C i,w Refers to the second specific heat capacity; The first porosity; T i T0 refers to the thermal storage temperature of each layer in the three-dimensional temperature field; T0 refers to the reference temperature.

[0120] This allows for the calculation of the second geothermal resource quantity, improving the accuracy of the second geothermal resource quantity and providing a basis for the calculation of geothermal resources.

[0121] In one possible embodiment, the volume is the product of the area of ​​each layer in the study area and the average thickness of the thermal reservoir in each layer.

[0122] As shown in Equation 6, the volume can be calculated:

[0123] V i =A i *H i Formula 6

[0124] Among them, V i Refers to volume; A i Area; H i This refers to the average thickness.

[0125] In this way, the volume of each geothermal reservoir in the study area can be calculated, providing a basis for calculating the amount of geothermal resources.

[0126] The geothermal resource calculation method provided by this invention can also be used in conjunction with a computer-readable storage medium. The storage medium stores a computer program, which is executed to run the geothermal resource calculation method. The computer program is capable of executing computer instructions, which include computer program code. The computer program code can be in the form of source code, object code, executable file, or some intermediate form.

[0127] Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0128] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0129] According to another aspect of the present invention, a geothermal resource quantity calculation apparatus is also provided, which performs a geothermal resource quantity calculation method. Figure 9 A block diagram of a geothermal resource calculation apparatus according to an embodiment of the present invention is shown. The apparatus includes:

[0130] The first module 510 is used to establish a three-dimensional structural model of the study area;

[0131] The second module 520 is used to establish a porosity model, density model and specific heat capacity model of the study area based on the three-dimensional structural model, porosity data, density data and specific heat capacity data of the study area;

[0132] The third module 530 is used to establish the three-dimensional temperature field of the study area based on the three-dimensional structural model and the heat flow data of the study area.

[0133] The calculation module 540 is used to calculate the geothermal resources in the study area based on the porosity model, density model, specific heat capacity model and three-dimensional temperature field.

[0134] Example: S1. Taking a certain oilfield area as an example, based on the abundant drilling data of the oilfield area and combined with the regional geological and geophysical data such as well logging, a three-dimensional structural model of the study area is established;

[0135] S2. Based on multi-well logging data, rock test analysis data, and three-dimensional structural model, establish a three-dimensional porosity model, a three-dimensional density model, and a three-dimensional specific heat capacity model for a certain oilfield area;

[0136] S3. Establish a three-dimensional temperature field model for a certain oilfield area;

[0137] S4. Export the calculation data table as shown in Table 1 (Table 1 only shows some parameters), and calculate the geothermal resources in the study area.

[0138] Table 1. Data for Calculating Geothermal Resources

[0139]

[0140]

[0141] The results show that in a certain region, the total geothermal resources in the five zones (Zone 1, Zone 2, Zone 3, Zone 4, and Zone 5) that require key evaluation, located at a depth of less than 6 km, are 1.67 * 10⁻⁶. 17 J. Zone 1 has a volume of 13.9 * 10⁻⁶. 10 m 3 The temperature ranges from 50.4 to 84.6℃, and the geothermal resource content in the rock is 1.1*10. 16 J, the geothermal resource volume is 1.8*10 16 J; Zone2 has a volume of 13*10 10 m 3 The temperature ranges from 71.8 to 128.5℃, and the geothermal resource content in the rock is 1.8*10. 16 J, the geothermal resource volume is 2.9*10 16 J; Zone 3 has a volume of 6.5*10 10 m3 The temperature ranges from 81.5 to 155.4℃, and the geothermal resource content in the rock is 1.1*10. 16 J, the geothermal resource volume is 1.8*10 16 J; Zone4 has a volume of 4.7*10 10 m 3 The temperature ranges from 114.5 to 171.9℃, and the geothermal resource content in the rock is 1.1*10. 16 J, the geothermal resource volume is 1.71*10 16 J; Zone 5 has a volume of 4.7*10 10 m 3 The temperature ranges from 115.1 to 195.5℃, and the geothermal resource content in the rock is 5.2*10. 16 J, the geothermal resource volume is 8.5*10 16 J.

[0142] The results show that this method is applicable to oilfield areas and can obtain the amount of geothermal resources in the rock skeleton and fluids of any evaluation unit in the study area. It has a good utilization effect on the evaluation of geothermal resources in oilfields, the selection of favorable geothermal areas, and the selection of sites for comprehensive utilization of new energy. It can provide detailed data and can be widely used in evaluation areas with detailed well logging and geological data.

[0143] In summary, this invention provides a method, apparatus, and medium for calculating geothermal resources, which have the following advantages compared with the prior art:

[0144] This invention first establishes a three-dimensional structural model of the study area. Then, based on the three-dimensional structural model, porosity data, density data, specific heat capacity data, and heat flow data, corresponding porosity models, density models, specific heat capacity models, and a three-dimensional temperature field are established. Finally, based on the porosity model, density model, specific heat capacity model, and three-dimensional temperature field, the geothermal resource quantity of the study area is calculated. This method improves the accuracy of geothermal resource calculation and enables the calculation of geothermal resources within the study area and any other region. It can be widely applied to the evaluation of geothermal resource potential in geological bodies, effectively supporting the exploration and development of geothermal resources.

[0145] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0146] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0147] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0148] Certain terms are used throughout this application to refer to specific system components. As those skilled in the art will recognize, the same components may often be referred to by different names, and therefore this application is not intended to distinguish those components that differ only in name and not in function. In this application, the terms “comprise,” “include,” and “have” are used in an open-ended manner and should therefore be interpreted as meaning “including, but not limited to…”. Furthermore, the terms “substantially,” “materially,” or “approximately” as used herein refer to industry-accepted tolerances for the corresponding terms. The term “coupling,” as may be used herein, includes direct coupling and indirect coupling via additional components, elements, circuits, or modules, wherein, for indirect coupling, the intermediate component, element, circuit, or module does not alter the information of the signal but may adjust its current level, voltage level, and / or power level. Inferred coupling (e.g., one element is inferredly coupled to another element) includes direct and indirect coupling between two elements in the same manner as “coupling.”

[0149] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0150] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0151] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for calculating geothermal resources, characterized in that, The method includes: Establish a three-dimensional structural model of the study area; Based on the three-dimensional structural model, the porosity data, density data, and specific heat capacity data of the study area, a porosity model, a density model, and a specific heat capacity model of the study area are established. Based on the three-dimensional structural model and the heat flow data of the study area, a three-dimensional temperature field of the study area is established. Based on the porosity model, the density model, the specific heat capacity model, and the three-dimensional temperature field, the geothermal resources of the study area are calculated.

2. The method as described in claim 1, characterized in that, The three-dimensional construction model is established through the following steps: Based on the drilling, geological, and seismic data of the study area, the boundaries and stratigraphic levels of the study area are obtained. Based on the boundary and the stratigraphic level, a three-dimensional geological framework for the study area is established; Based on the aforementioned three-dimensional geological framework, the three-dimensional structural model is established.

3. The method as described in claim 2, characterized in that, The three-dimensional construction model is established through the following steps: Based on the aforementioned three-dimensional geological framework, geological bodies and strata of the study area are established, and meshing is performed to create the three-dimensional structural model composed of multiple mesh units.

4. The method as described in claim 3, characterized in that, The porosity model, density model, and specific heat capacity model are established through the following steps: Based on the porosity data, density data, and specific heat capacity data, values ​​are assigned to the three-dimensional structural model, and spatial interpolation is performed to establish the porosity model, the density model, and the specific heat capacity model.

5. The method as described in claim 3 or 4, characterized in that, The three-dimensional temperature field is established through the following steps: Based on the three-dimensional structural model and the heat flow data, the geothermal heat flow field of the study area is established; Based on the geothermal flow field and the thermal conductivity of the strata in the study area, a temperature increment model for the study area is established. The three-dimensional temperature field is obtained by adding the surface temperature of the study area to the summation result of the temperature increment model.

6. The method as described in claim 5, characterized in that, The temperature increment model is established through the following steps: Divide the geothermal flow field by the thermal conductivity of the strata to obtain the geothermal gradient; Based on the geothermal gradient and the three-dimensional structural model, the temperature increment model is established.

7. The method according to any one of claims 3-6, characterized in that, The geothermal resource quantity is calculated using the following steps: Based on the three-dimensional temperature field, the porosity model, the density model, the specific heat capacity model, and the volume of each of the thermal reservoirs in the study area, the first geothermal resource quantity and the second geothermal resource quantity corresponding to the thermal reservoir rocks and geothermal fluids in the study area are calculated respectively. The geothermal resource quantity is obtained by summing the first geothermal resource quantity and the second geothermal resource quantity.

8. The method as described in claim 7, characterized in that, The first geothermal resource quantity is determined by the following steps: Based on the porosity model, the density model, and the specific heat capacity model, the first porosity, the first density, and the first specific heat capacity of the thermal reservoir rock in each layer are obtained respectively. The difference between the preset value and the first porosity is determined as the second porosity; The difference between the three-dimensional temperature field and the reference temperature is determined as the first target temperature; The first geothermal resource quantity is obtained by summing the results of multiplying the volume by the first density, the first specific heat capacity, the second porosity, and the first target temperature.

9. The method as described in claim 8, characterized in that, The second geothermal resource quantity is determined through the following steps: Based on the density model and the specific heat capacity model, the second density and the second specific heat capacity of the geothermal fluid in each layer are obtained respectively. The second geothermal resource quantity is obtained by summing the results of multiplying the volume by the second density, the second specific heat capacity, the first porosity, and the first target temperature.

10. The method according to any one of claims 7-9, characterized in that, The volume is the product of the area of ​​each of the layers in the study area and the average thickness of the thermal reservoir in each layer.

11. A storage medium, characterized in that, It includes a series of instructions for performing the method steps as described in any one of claims 1-10.

12. A geothermal resource calculation device, characterized in that, The apparatus for performing the method as described in any one of claims 1-10 includes: The first module is used to create a three-dimensional structural model of the study area; The second module is used to establish a porosity model, density model, and specific heat capacity model of the study area based on the three-dimensional structural model, porosity data, density data, and specific heat capacity data of the study area. The third module is used to establish the three-dimensional temperature field of the study area based on the three-dimensional construction model and the heat flow data of the study area. The calculation module is used to calculate the geothermal resources of the study area based on the porosity model, the density model, the specific heat capacity model, and the three-dimensional temperature field.

Images