A highly efficient and intelligent mining and reinjection system for medium-deep geothermal wells

Abstract

The present invention discloses a high-efficiency and intelligent exploitation and reinjection system for medium-deep geothermal wells, and specifically relates to the field of data analysis technology, including a geothermal well depth division module, a geothermal well information acquisition module, a geothermal well information processing module, a geothermal well information analysis module, and a geothermal well information early warning module. The present invention calculates a geothermal water production capacity evaluation index, a geothermal water exploitation effect evaluation index, and a geothermal water exchange utilization efficiency index through real-time monitoring data. Based on a geothermal water comprehensive management coefficient, a geothermal water exploitation and reinjection early warning coefficient is analyzed and obtained, and compared with a preset value, the effect of geothermal water exploitation and reinjection is comprehensively evaluated from multiple dimensions, thereby being able to more accurately reflect the actual situation of geothermal well exploitation and reinjection. By judging whether the exploitation and reinjection of a specific geothermal well at a specific exploitation depth are abnormal, the early warning is made more targeted and accurate. At the same time, management efficiency is improved through automated early warning.

Description

Technical Field

[0001] The present invention relates to the field of data analysis technology, and more specifically, to a high-efficiency intelligent mining and reinjection system for medium-deep geothermal wells. Background Art

[0002] Geothermal energy is a new type of clean energy. With the development of groundwater heat pumps and drilling technology, geothermal energy has been widely developed and utilized. In the process of shallow geothermal development, the quality of the groundwater heat pump system is closely related to the local hydrogeological conditions and well layout. Due to the complexity of the stratum structure, there are many uncertainties in the exploitation of medium and deep underground hot water.

[0003] Research on predictive models for the exploitation of medium- and deep-layer geothermal resources is also ongoing. Based on the permeability and porosity of pores and fractured media, well radius, injection pressure, temperature and other parameters, through thermal-hydrodynamic coupling numerical simulation, the difficulty of work can be effectively reduced, and the drilling of geothermal wells can be better guided, thereby improving the exploitation efficiency and economic benefits of geothermal wells.

[0004] However, it still has some shortcomings in actual use. For example, the comprehensive management of existing geothermal well exploitation and reinjection involves multiple parameters. Due to the uncertainty of evaluation parameters, the existing evaluation model still has certain limitations, thus affecting the accuracy of the evaluation.

[0005] The large amount of data generated during geothermal well mining and reinjection needs to be processed and analyzed in a timely and accurate manner in order to detect abnormal situations. However, the existing geothermal well early warning methods rely on the experience and subjective judgment of operators, lack intelligent data analysis and processing capabilities, and it is difficult to effectively extract and utilize useful information in the data. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a high-efficiency intelligent exploitation and reinjection system for medium-deep geothermal wells, which is used to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high-efficiency intelligent mining and reinjection system for medium-deep geothermal wells, comprising:

[0008] Geothermal well depth division module: used to divide the target well network layout into various monitoring sub-areas according to the geothermal well mining depth division method, and number each monitoring sub-area of ​​the geothermal well mining depth.

[0009] Geothermal well information acquisition module: used to obtain key data of each monitoring sub-area of ​​geothermal well exploitation depth. The geothermal well information acquisition module includes a geothermal reservoir information acquisition unit, a geothermal water exploitation information acquisition unit and a geothermal water exchange information acquisition unit. The key data includes geothermal reservoir information, geothermal water exploitation information and geothermal water exchange information.

[0010] Geothermal well information processing module: used to receive key data transmitted by the geothermal well information acquisition module, calculate the geothermal water production capacity evaluation index of each monitoring sub-area of ​​the geothermal well exploitation depth according to the geothermal reservoir information acquisition unit, calculate the geothermal water exploitation effect evaluation index of each monitoring sub-area of ​​the geothermal well exploitation depth according to the geothermal water exploitation information acquisition unit, and calculate the geothermal water exchange utilization efficiency index of each monitoring sub-area of ​​the geothermal well exploitation depth according to the geothermal water exchange information acquisition unit.

[0011] Geothermal well information analysis module: used to receive the geothermal water production capacity evaluation index, geothermal water extraction effect evaluation index and geothermal water exchange utilization efficiency index of each monitoring sub-area of ​​the geothermal well extraction depth transmitted by the geothermal well information processing module, and calculate the geothermal water comprehensive management coefficient of each monitoring sub-area of ​​the geothermal well extraction depth.

[0012] Geothermal well information warning module: used to extract the geothermal water comprehensive management coefficient corresponding to the geothermal wells in each mining depth, calculate the geothermal well mining and reinjection warning coefficient in each mining depth, compare it with the preset geothermal well mining and reinjection warning coefficient, and process it.

[0013] Preferably, the specific division method of the geothermal well depth division module is:

[0014] The mining depths of various geothermal wells within the target well network layout are obtained, and the mining depths of the geothermal wells are divided into monitoring sub-areas according to the mining depth division method of the geothermal wells. The monitoring sub-areas of the mining depth of the geothermal wells are numbered 1, 2...n in sequence.

[0015] Preferably, the specific acquisition method of the geothermal well information acquisition module is:

[0016] Geothermal reservoir information acquisition unit: obtain the aquifer thickness, permeability coefficient, and porosity of each monitoring sub-area at the depth of geothermal well mining, marked as ch i 、cs i ,ck i , where i = 1, 2, ... n, i represents the number of the i-th monitoring sub-area;

[0017] Geothermal water exploitation information acquisition unit: obtain the outlet water temperature, return water temperature, well spacing, and exploitation pressure of each monitoring sub-area of ​​the geothermal well exploitation depth, marked as kc i kh i ,kli 、kp i , where i = 1, 2, ... n, i represents the number of the i-th monitoring sub-area;

[0018] Geothermal water exchange information acquisition unit: obtain the water output, recharge volume, water level before mining, and water level after mining of each monitoring sub-area at the mining depth of the geothermal well, marked as ho i ,hb i 、hq i hr i , where i=1, 2,...n, and i represents the number of the i-th monitoring sub-area.

[0019] Preferably, the calculation formula of the geothermal water capacity evaluation index is:

[0020] Step S01: Obtain the mining depth of each monitoring sub-area of ​​the geothermal well mining depth, marked as D i ;

[0021] Step S02: The calculation formula of the geothermal water capacity evaluation index is:

[0022] where α i Expressed as the geothermal water capacity assessment index of the ith monitoring sub-area, cs i It is expressed as the permeability coefficient of the ith monitoring sub-area, D i It is expressed as the mining depth of the ith monitoring sub-area, ck i is the porosity of the ith monitoring sub-area, CK0 is the preset porosity, and ch i It is represented as the aquifer thickness of the ith monitoring sub-area.

[0023] Preferably, the geothermal water exploitation effect evaluation index is specifically:

[0024] Step S01: Substitute the outflow temperature, return water temperature and mining depth of each monitoring sub-area of ​​the geothermal well mining depth into the formula: The formula for water temperature stability is obtained, where T i Expressed as the water temperature stability of the ith monitoring sub-area, kc i It is represented as the outlet water temperature of the ith monitoring sub-area, kh i It is represented as the return water temperature of the ith monitoring sub-area, D i It is represented as the mining depth of the ith monitoring sub-area;

[0025] Step S02: Extract the maximum water temperature stability value, marked as T max ;

[0026] Step S03: The calculation formula of the geothermal water exploitation effect evaluation index is:

[0027] where β i It is expressed as the evaluation index of geothermal water exploitation effect in the ith monitoring sub-area, T max Expressed as the maximum water temperature stability, T i is represented by the water temperature stability of the ith monitoring sub-area, e is represented by the natural constant, kl i represents the well spacing of the ith monitoring sub-area, KL0 represents the preset well spacing, and kp i It is represented as the production pressure of the ith monitoring sub-area, and ΔKP is represented as the average production pressure.

[0028] Preferably, the calculation formula of the geothermal water exchange utilization efficiency index is:

[0029] where γ i It is expressed as the geothermal water exchange utilization efficiency index of the i-th monitoring sub-area, ho i It is expressed as the water output of the ith monitoring sub-area, hb i It is expressed as the recharge volume of the ith monitoring sub-area, BO 预 Expressed as preset water volume change, hq i It is represented by the water level before mining in the ith monitoring sub-area, hr i It is represented by the water level after mining in the ith monitoring sub-area, RQ 预 It represents the preset water level change, and ε1 and ε2 represent the compensation coefficients of water volume change and water level change respectively.

[0030] Preferably, the calculation formula of the geothermal water comprehensive management coefficient is:

[0031] where θ i Expressed as the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, α i Expressed as the geothermal water capacity assessment index of the i-th monitoring sub-area, β i Expressed as the evaluation index of geothermal water exploitation effect in the ith monitoring sub-area, γ i Expressed as the geothermal water exchange utilization efficiency index of the i-th monitoring sub-area.

[0032] Preferably, the geothermal well information early warning module is specifically:

[0033] Step S01: Extract the comprehensive management coefficient of geothermal water in the monitoring sub-area of ​​the i-th mining depth, marked as Extract the geothermal water production capacity assessment index in the i-th mining depth monitoring sub-area, marked as Extract the geothermal water mining effect evaluation index in the i-th mining depth monitoring sub-area, marked as Extract the geothermal water exchange utilization efficiency index in the monitoring sub-area of ​​the i-th mining depth, marked as Where q = 1, 2, ..., m, q represents the number of the qth geothermal well;

[0034] Step S02: Extract the maximum and minimum values ​​of the geothermal water comprehensive management coefficient in the i-th mining depth monitoring sub-area, marked as Extract the maximum value of the geothermal water capacity assessment index in the i-th mining depth monitoring sub-area, marked as Extract the maximum value of the geothermal water mining effect evaluation index in the i-th mining depth monitoring sub-area, marked as Extract the minimum value of the geothermal water exchange utilization efficiency index in the monitoring sub-area of ​​the i-th mining depth, marked as

[0035] Step S03: The calculation formula of the geothermal well exploitation and reinjection warning coefficient is:

[0036] in It is expressed as the geothermal well production and reinjection warning coefficient of the qth geothermal well in the ith monitoring sub-area, It is expressed as the maximum value of the geothermal water production capacity assessment index of the i-th monitoring sub-area, It is expressed as the maximum value of the geothermal water exploitation effect evaluation index of the ith monitoring sub-area, It is expressed as the minimum value of the geothermal water exchange utilization efficiency index of the ith monitoring sub-area, It is expressed as the maximum value of the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, It is expressed as the minimum value of the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, It is expressed as the comprehensive management coefficient of geothermal water of the qth geothermal well in the ith monitoring sub-area;

[0037] Step S04: Obtain the geothermal well exploitation and reinjection warning coefficient within each exploitation depth, and compare it with the preset geothermal well exploitation and reinjection warning coefficient. If the geothermal well exploitation and reinjection warning coefficient of a geothermal well is less than the preset geothermal well exploitation and reinjection warning coefficient, it indicates that there is an abnormality in the exploitation and reinjection of the geothermal well. Then, the number and exploitation depth of the abnormal geothermal well are obtained and sent to the management terminal. Otherwise, it indicates that there is no abnormality in the exploitation and reinjection of the geothermal well.

[0038] Technical effects and advantages of the present invention:

[0039] 1. The present invention provides a high-efficiency and intelligent mining and reinjection system for medium-deep geothermal wells. By acquiring key data of each monitoring sub-area at the mining depth of the geothermal well, the geothermal water production capacity evaluation index of each monitoring sub-area at the mining depth of the geothermal well is calculated according to the geothermal reservoir information acquisition unit, the geothermal water mining effect evaluation index of each monitoring sub-area at the mining depth of the geothermal well is calculated according to the geothermal water mining information acquisition unit, and the geothermal water exchange utilization efficiency index of each monitoring sub-area at the mining depth of the geothermal well is calculated according to the geothermal water exchange information acquisition unit. The geothermal water comprehensive management coefficient is further analyzed. Based on the real-time monitoring data, the effects of geothermal water mining and reinjection are comprehensively evaluated from multiple dimensions, so that the actual situation of geothermal well mining and reinjection can be more accurately reflected, which is conducive to the management personnel to intuitively understand the comprehensive evaluation indicators of geothermal water at different mining depths;

[0040] 2. The present invention provides a high-efficiency and intelligent exploitation and reinjection system for medium-deep geothermal wells. The system extracts evaluation data of geothermal wells at various exploitation depths and calculates geothermal well exploitation and reinjection warning coefficients based on the comprehensive management coefficients of geothermal water corresponding to the geothermal wells at various exploitation depths. The coefficients are compared with the preset geothermal well exploitation and reinjection warning coefficients. If the geothermal well exploitation and reinjection warning coefficient of a geothermal well is less than the preset geothermal well exploitation and reinjection warning coefficient, it indicates that the exploitation and reinjection of the geothermal well is abnormal. The number and exploitation depth of the abnormal geothermal well are obtained and sent to the management terminal. Otherwise, it indicates that there is no abnormality in the exploitation and reinjection of the geothermal well. By judging whether the exploitation and reinjection of a specific geothermal well at a specific exploitation depth are abnormal, the early warning is made more targeted and accurate. At the same time, the management efficiency is improved through automated early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the system module process connection of the present invention.

[0042] Figure 2 It is a schematic diagram of the structure of the geothermal well information acquisition module of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1 As shown, the present invention provides a medium-deep geothermal well efficient intelligent exploitation and reinjection system, including a geothermal well depth division module, a geothermal well information acquisition module, a geothermal well information processing module, a geothermal well information analysis module, and a geothermal well information early warning module.

[0045] The geothermal well depth division module is connected to the geothermal well information acquisition module, the geothermal well information acquisition module is connected to the geothermal well information processing module, the geothermal well information processing module is connected to the geothermal well information analysis module, and the geothermal well information analysis module is connected to the geothermal well information early warning module.

[0046] The geothermal well depth division module is used to divide the target well network layout into various monitoring sub-areas according to the geothermal well exploitation depth division method, and number each monitoring sub-area of ​​the geothermal well exploitation depth.

[0047] In a possible design, the specific division method of the geothermal well depth division module is:

[0048] The mining depths of various geothermal wells within the target well network layout are obtained, and the mining depths of the geothermal wells are divided into monitoring sub-areas according to the mining depth division method of the geothermal wells. The monitoring sub-areas of the mining depth of the geothermal wells are numbered 1, 2...n in sequence.

[0049] See also Figure 1 As shown, the geothermal well information acquisition module is used to obtain key data of each monitoring sub-area of ​​the geothermal well exploitation depth. The geothermal well information acquisition module includes a geothermal reservoir information acquisition unit, a geothermal water exploitation information acquisition unit and a geothermal water exchange information acquisition unit. The key data includes geothermal reservoir information, geothermal water exploitation information and geothermal water exchange information.

[0050] In a possible design, the specific acquisition method of the geothermal well information acquisition module is:

[0051] Geothermal reservoir information acquisition unit: obtain the aquifer thickness, permeability coefficient, and porosity of each monitoring sub-area at the depth of geothermal well mining, marked as ch i 、cs i ,ck i , where i = 1, 2, ... n, i represents the number of the i-th monitoring sub-area;

[0052] Geothermal water exploitation information acquisition unit: obtain the outlet water temperature, return water temperature, well spacing, and exploitation pressure of each monitoring sub-area of ​​the geothermal well exploitation depth, marked as kc i kh i ,kl i 、kp i , where i = 1, 2, ... n, i represents the number of the i-th monitoring sub-area;

[0053] Geothermal water exchange information acquisition unit: obtain the water output, recharge volume, water level before mining, and water level after mining of each monitoring sub-area at the mining depth of the geothermal well, marked as ho i ,hb i 、hqi hr i , where i=1, 2,...n, and i represents the number of the i-th monitoring sub-area.

[0054] The geothermal well information processing module is used to receive key data transmitted by the geothermal well information acquisition module, calculate the geothermal water production capacity evaluation index of each monitoring sub-area of ​​the geothermal well exploitation depth according to the geothermal reservoir information acquisition unit, calculate the geothermal water exploitation effect evaluation index of each monitoring sub-area of ​​the geothermal well exploitation depth according to the geothermal water exploitation information acquisition unit, and calculate the geothermal water exchange utilization efficiency index of each monitoring sub-area of ​​the geothermal well exploitation depth according to the geothermal water exchange information acquisition unit.

[0055] In a possible design, the calculation formula of the geothermal water capacity evaluation index is:

[0056] Step S01: Obtain the mining depth of each monitoring sub-area of ​​the geothermal well mining depth, marked as D i ;

[0057] Step S02: The calculation formula of the geothermal water capacity evaluation index is:

[0058] where α i Expressed as the geothermal water capacity assessment index of the ith monitoring sub-area, cs i It is expressed as the permeability coefficient of the ith monitoring sub-area, D i It is expressed as the mining depth of the ith monitoring sub-area, ck i is the porosity of the ith monitoring sub-area, CK0 is the preset porosity, and ch i It is represented as the aquifer thickness of the ith monitoring sub-area.

[0059] In a possible design, the geothermal water exploitation effect evaluation index is specifically:

[0060] Step S01: Substitute the outflow temperature, return water temperature and mining depth of each monitoring sub-area of ​​the geothermal well mining depth into the formula: The formula for water temperature stability is obtained, where T i Expressed as the water temperature stability of the ith monitoring sub-area, kc i It is represented as the outlet water temperature of the ith monitoring sub-area, kh i It is represented as the return water temperature of the ith monitoring sub-area, D i It is represented as the mining depth of the ith monitoring sub-area;

[0061] Step S02: Extract the maximum water temperature stability value, marked as T max ;

[0062] Step S03: The calculation formula of the geothermal water exploitation effect evaluation index is:

[0063] where β i It is expressed as the evaluation index of geothermal water exploitation effect in the ith monitoring sub-area, T max Expressed as the maximum water temperature stability, T i is represented by the water temperature stability of the ith monitoring sub-area, e is represented by the natural constant, kl i represents the well spacing of the ith monitoring sub-area, KL0 represents the preset well spacing, and kp i It is represented as the production pressure of the ith monitoring sub-area, and ΔKP is represented as the average production pressure.

[0064] In a possible design, the calculation formula of the geothermal water exchange utilization efficiency index is:

[0065] where γ i It is expressed as the geothermal water exchange utilization efficiency index of the i-th monitoring sub-area, ho i It is expressed as the water output of the ith monitoring sub-area, hb i It is expressed as the recharge volume of the ith monitoring sub-area, BO 预 Expressed as preset water volume change, hq i It is represented by the water level before mining in the ith monitoring sub-area, hr i It is represented by the water level after mining in the ith monitoring sub-area, RQ 预 It represents the preset water level change, and ε1 and ε2 represent the compensation coefficients of water volume change and water level change respectively.

[0066] The geothermal well information analysis module is used to receive the geothermal water production capacity evaluation index, geothermal water exploitation effect evaluation index and geothermal water exchange utilization efficiency index of each monitoring sub-area of ​​the geothermal well exploitation depth transmitted by the geothermal well information processing module, and calculate the geothermal water comprehensive management coefficient of each monitoring sub-area of ​​the geothermal well exploitation depth.

[0067] In a possible design, the calculation formula of the geothermal water comprehensive management coefficient is:

[0068] where θ i Expressed as the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, α i Expressed as the geothermal water capacity assessment index of the i-th monitoring sub-area, β i Expressed as the evaluation index of geothermal water exploitation effect in the ith monitoring sub-area, γ i Expressed as the geothermal water exchange utilization efficiency index of the i-th monitoring sub-area.

[0069] The geothermal well information warning module is used to extract the geothermal water comprehensive management coefficient corresponding to the geothermal wells in each mining depth, calculate the geothermal well mining and reinjection warning coefficient in each mining depth, compare it with the preset geothermal well mining and reinjection warning coefficient, and process it.

[0070] In a possible design, the geothermal well information early warning module is specifically:

[0071] Step S01: Extract the comprehensive management coefficient of geothermal water in the monitoring sub-area of ​​the i-th mining depth, marked as Extract the geothermal water production capacity assessment index in the i-th mining depth monitoring sub-area, marked as Extract the geothermal water mining effect evaluation index in the i-th mining depth monitoring sub-area, marked as Extract the geothermal water exchange utilization efficiency index in the monitoring sub-area of ​​the i-th mining depth, marked as Where q = 1, 2, ..., m, q represents the number of the qth geothermal well;

[0072] Step S02: Extract the maximum and minimum values ​​of the geothermal water comprehensive management coefficient in the i-th mining depth monitoring sub-area, marked as Extract the maximum value of the geothermal water capacity assessment index in the i-th mining depth monitoring sub-area, marked as Extract the maximum value of the geothermal water mining effect evaluation index in the i-th mining depth monitoring sub-area, marked as Extract the minimum value of the geothermal water exchange utilization efficiency index in the monitoring sub-area of ​​the i-th mining depth, marked as

[0073] Step S03: The calculation formula of the geothermal well exploitation and reinjection warning coefficient is:

[0074] in It is expressed as the geothermal well production and reinjection warning coefficient of the qth geothermal well in the ith monitoring sub-area, It is expressed as the maximum value of the geothermal water production capacity assessment index of the i-th monitoring sub-area, It is expressed as the maximum value of the geothermal water exploitation effect evaluation index of the ith monitoring sub-area, It is expressed as the minimum value of the geothermal water exchange utilization efficiency index of the ith monitoring sub-area, It is expressed as the maximum value of the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, It is expressed as the minimum value of the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, It is expressed as the comprehensive management coefficient of geothermal water of the qth geothermal well in the ith monitoring sub-area.

[0075] Step S04: Obtain the geothermal well exploitation and reinjection warning coefficient within each exploitation depth, and compare it with the preset geothermal well exploitation and reinjection warning coefficient. If the geothermal well exploitation and reinjection warning coefficient of a geothermal well is less than the preset geothermal well exploitation and reinjection warning coefficient, it indicates that there is an abnormality in the exploitation and reinjection of the geothermal well. Then, the number and exploitation depth of the abnormal geothermal well are obtained and sent to the management terminal. Otherwise, it indicates that there is no abnormality in the exploitation and reinjection of the geothermal well.

[0076] In the present embodiment, it should be specifically explained that the present invention obtains key data of each monitoring sub-area at the exploitation depth of the geothermal well, calculates the geothermal water production capacity evaluation index of each monitoring sub-area at the exploitation depth of the geothermal well according to the geothermal reservoir information acquisition unit, calculates the geothermal water exploitation effect evaluation index of each monitoring sub-area at the exploitation depth of the geothermal well according to the geothermal water exploitation information acquisition unit, calculates the geothermal water exchange utilization efficiency index of each monitoring sub-area at the exploitation depth of the geothermal well according to the geothermal water exchange information acquisition unit, further analyzes to obtain the geothermal water comprehensive management coefficient, and comprehensively evaluates the effects of geothermal water exploitation and reinjection from multiple dimensions based on real-time monitoring data, thereby being able to more accurately reflect the actual situation of geothermal well exploitation and reinjection, which is conducive to managers being able to intuitively understand the comprehensive evaluation indicators of geothermal water at different exploitation depths.

[0077] The present invention extracts evaluation data of geothermal wells at various mining depths, calculates geothermal well mining and reinjection warning coefficients based on comprehensive geothermal water management coefficients corresponding to geothermal wells at various mining depths, and compares the coefficients with preset geothermal well mining and reinjection warning coefficients. If the geothermal well mining and reinjection warning coefficient of a geothermal well is less than the preset geothermal well mining and reinjection warning coefficient, it indicates that the mining and reinjection of the geothermal well are abnormal. The number and mining depth of the abnormal geothermal well are obtained and sent to the management terminal. Otherwise, it indicates that there is no abnormality in the mining and reinjection of the geothermal well. By judging whether the mining and reinjection of a specific geothermal well at a specific mining depth are abnormal, the warning is made more targeted and accurate. At the same time, the management efficiency is improved through automated warning.

[0078] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly efficient and intelligent mining and reinjection system for medium-deep geothermal wells, characterized in that: include: Geothermal well depth division module: used to divide the target well network layout into various monitoring sub-areas according to the geothermal well mining depth division method, and number each monitoring sub-area of ​​the geothermal well mining depth; Geothermal well information acquisition module: used to obtain key data of each monitoring sub-area of ​​the geothermal well exploitation depth, the geothermal well information acquisition module includes a geothermal reservoir information acquisition unit, a geothermal water exploitation information acquisition unit and a geothermal water exchange information acquisition unit, the key data includes geothermal reservoir information, geothermal water exploitation information and geothermal water exchange information; Geothermal well information processing module: used to receive key data transmitted by the geothermal well information acquisition module, calculate the geothermal water production capacity evaluation index of each monitoring sub-area of ​​the geothermal well mining depth according to the geothermal reservoir information acquisition unit, calculate the geothermal water mining effect evaluation index of each monitoring sub-area of ​​the geothermal well mining depth according to the geothermal water mining information acquisition unit, and calculate the geothermal water exchange utilization efficiency index of each monitoring sub-area of ​​the geothermal well mining depth according to the geothermal water exchange information acquisition unit; Geothermal well information analysis module: used to receive the geothermal water production capacity evaluation index, geothermal water exploitation effect evaluation index and geothermal water exchange utilization efficiency index of each monitoring sub-area of ​​the geothermal well exploitation depth transmitted by the geothermal well information processing module, and calculate the geothermal water comprehensive management coefficient of each monitoring sub-area of ​​the geothermal well exploitation depth; Geothermal well information warning module: used to extract the geothermal water comprehensive management coefficient corresponding to the geothermal wells in each mining depth, calculate the geothermal well mining and reinjection warning coefficient in each mining depth, compare it with the preset geothermal well mining and reinjection warning coefficient, and process it; The calculation formula of the geothermal water production capacity evaluation index is: Step S01: Obtain the mining depth of each monitoring sub-area of ​​the geothermal well mining depth, marked as D i ; Step S02: The calculation formula of the geothermal water capacity evaluation index is: where α i Expressed as the geothermal water capacity assessment index of the ith monitoring sub-area, cs i It is expressed as the permeability coefficient of the ith monitoring sub-area, D i It is expressed as the mining depth of the ith monitoring sub-area, ck i is the porosity of the ith monitoring sub-area, CK0 is the preset porosity, and ch i It is expressed as the aquifer thickness of the ith monitoring sub-area; The geothermal water exploitation effect evaluation index is specifically: Step S01: Substitute the outflow temperature, return water temperature and mining depth of each monitoring sub-area of ​​the geothermal well mining depth into the formula: The formula for water temperature stability is obtained, where T i Expressed as the water temperature stability of the ith monitoring sub-area, kc i It is represented as the outlet water temperature of the ith monitoring sub-area, kh i It is represented as the return water temperature of the ith monitoring sub-area, D i It is represented as the mining depth of the ith monitoring sub-area; Step S02: Extract the maximum water temperature stability value, marked as T max ; Step S03: The calculation formula of the geothermal water exploitation effect evaluation index is: where β i It is expressed as the evaluation index of geothermal water exploitation effect in the ith monitoring sub-area, T max Expressed as the maximum water temperature stability, T i is represented by the water temperature stability of the ith monitoring sub-area, e is represented by the natural constant, kl i represents the well spacing of the ith monitoring sub-area, KL0 represents the preset well spacing, and kp i It is represented as the production pressure of the ith monitoring sub-area, and ΔKP is represented as the average production pressure; The calculation formula of the geothermal water exchange utilization efficiency index is: where γ i It is expressed as the geothermal water exchange utilization efficiency index of the i-th monitoring sub-area, ho i It is expressed as the water output of the ith monitoring sub-area, hb i It is expressed as the recharge volume of the ith monitoring sub-area, BO 预 Expressed as preset water volume change, hq i It is represented by the water level before mining in the ith monitoring sub-area, hr i It is represented by the water level after mining in the ith monitoring sub-area, RQ 预 It represents the preset water level change, ε1 and ε2 represent the compensation coefficients of water volume change and water level change respectively; The calculation formula of the geothermal water comprehensive management coefficient is: where θ i Expressed as the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, α i Expressed as the geothermal water capacity assessment index of the i-th monitoring sub-area, β i Expressed as the evaluation index of geothermal water exploitation effect in the ith monitoring sub-area, γ i It is expressed as the geothermal water exchange utilization efficiency index of the i-th monitoring sub-area; The geothermal well information early warning module is specifically: Step S01: Extract the comprehensive management coefficient of geothermal water in the monitoring sub-area of ​​the i-th mining depth, marked as Extract the geothermal water production capacity assessment index in the i-th mining depth monitoring sub-area, marked as Extract the geothermal water mining effect evaluation index in the i-th mining depth monitoring sub-area, marked as Extract the geothermal water exchange utilization efficiency index in the monitoring sub-area of ​​the i-th mining depth, marked as Where q = 1, 2, ..., m, q represents the number of the qth geothermal well; Step S02: Extract the maximum and minimum values ​​of the geothermal water comprehensive management coefficient in the i-th mining depth monitoring sub-area, marked as Extract the maximum value of the geothermal water capacity assessment index in the i-th mining depth monitoring sub-area, marked as Extract the maximum value of the geothermal water mining effect evaluation index in the i-th mining depth monitoring sub-area, marked as Extract the minimum value of the geothermal water exchange utilization efficiency index in the monitoring sub-area of ​​the i-th mining depth, marked as Step S03: The calculation formula of the geothermal well exploitation and reinjection warning coefficient is: in It is expressed as the geothermal well production and reinjection warning coefficient of the qth geothermal well in the ith monitoring sub-area, It is expressed as the maximum value of the geothermal water production capacity assessment index of the i-th monitoring sub-area, It is expressed as the maximum value of the geothermal water exploitation effect evaluation index of the ith monitoring sub-area, It is expressed as the minimum value of the geothermal water exchange utilization efficiency index of the ith monitoring sub-area, It is expressed as the maximum value of the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, It is expressed as the minimum value of the comprehensive management coefficient of geothermal water in the ith monitoring sub-area, It is expressed as the comprehensive management coefficient of geothermal water of the qth geothermal well in the ith monitoring sub-area; Step S04: Obtain the geothermal well exploitation and reinjection warning coefficient within each exploitation depth, and compare it with the preset geothermal well exploitation and reinjection warning coefficient. If the geothermal well exploitation and reinjection warning coefficient of a geothermal well is less than the preset geothermal well exploitation and reinjection warning coefficient, it indicates that there is an abnormality in the exploitation and reinjection of the geothermal well. Then, the number and exploitation depth of the abnormal geothermal well are obtained and sent to the management terminal. Otherwise, it indicates that there is no abnormality in the exploitation and reinjection of the geothermal well.

2. According to claim 1, a high-efficiency intelligent mining and reinjection system for medium-deep geothermal wells is characterized by: The specific division method of the geothermal well depth division module is as follows: The mining depths of various geothermal wells within the target well network layout are obtained, and the mining depths of the geothermal wells are divided into monitoring sub-areas according to the mining depth division method of the geothermal wells. The monitoring sub-areas of the mining depth of the geothermal wells are numbered 1, 2...n in sequence.

3. The high-efficiency intelligent mining and reinjection system for medium-deep geothermal wells according to claim 1 is characterized by: The specific acquisition method of the geothermal well information acquisition module is: Geothermal reservoir information acquisition unit: obtain the aquifer thickness, permeability coefficient, and porosity of each monitoring sub-area at the depth of geothermal well mining, marked as ch i 、cs i ,ck i , where i = 1, 2, ... n, i represents the number of the i-th monitoring sub-area; Geothermal water exploitation information acquisition unit: obtain the outlet water temperature, return water temperature, well spacing, and exploitation pressure of each monitoring sub-area of ​​the geothermal well exploitation depth, marked as kc i kh i ,kl i 、kp i , where i = 1, 2, ... n, i represents the number of the i-th monitoring sub-area; Geothermal water exchange information acquisition unit: obtain the water output, recharge volume, water level before mining, and water level after mining of each monitoring sub-area at the mining depth of the geothermal well, marked as ho i ,hb i 、hq i hr i , where i=1, 2,...n, and i represents the number of the i-th monitoring sub-area.

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