CN117365295A - Geothermal water reservoir section cave making method and geothermal water heat exchange system - Google Patents
Geothermal water reservoir section cave making method and geothermal water heat exchange system Download PDFInfo
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- CN117365295A CN117365295A CN202311287425.0A CN202311287425A CN117365295A CN 117365295 A CN117365295 A CN 117365295A CN 202311287425 A CN202311287425 A CN 202311287425A CN 117365295 A CN117365295 A CN 117365295A
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- geothermal water
- water reservoir
- geothermal
- reservoir section
- heat exchange
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000002360 explosive Substances 0.000 claims abstract description 42
- 239000011148 porous material Substances 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/007—Drilling by use of explosives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a geothermal water reservoir section hole making method and a geothermal water heat exchange system. Firstly, carrying out hydraulic directional perforation on a geothermal water reservoir section of a target well through a hydraulic ejector so as to enable the geothermal water reservoir section to form a pore space, then injecting explosive into the geothermal water reservoir section, enabling the explosive to enter the pore space, finally closing the well, and detonating the explosive after the well pressure of the target well is stabilized so as to enable the diameter of the geothermal water reservoir section to be enlarged to a preset diameter. Through the geothermal water reservoir section hole making method disclosed by the application, the diameter of the geothermal water reservoir section of the target well can be effectively enlarged to the preset diameter, geothermal Tian Kongqiang is formed, and then the geothermal water heat exchange system of the compressed spiral hose is adopted for heat exchange, so that the geothermal heat utilization rate can be effectively increased.
Description
Technical Field
The invention relates to the technical field of geothermal exploitation, in particular to a geothermal water reservoir section hole making method and a geothermal water heat exchange system.
Background
The geothermal energy is mainly utilized by converting a low-grade heat source endowed in a stratum into a high-grade heat source which can be utilized by a heat exchange mode of a heat pump technology, and the geothermal energy can supply heat and refrigerate. In recent years, the application of geothermal energy heating has been increased in part of areas, and a single-well heat exchange technology, namely a single-well groundwater recharging and heat taking mode, is generally used.
However, the single well groundwater recharge and heat extraction mode is adopted for heat exchange, so that the heat exchange cost is high, the damage to the geothermal reservoir is large in the exploitation process, and the geothermal temperature decay is fast, therefore, the high temperature is difficult to maintain for a long time after the single well exploitation.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a geothermal water reservoir section hole-making method and a geothermal water heat exchange system, which are used for solving the problems that the heat exchange cost is high, the damage to a geothermal reservoir is large in the exploitation process, and the geothermal temperature is fast attenuated due to the fact that the heat exchange is carried out in a single-well groundwater recharge heat-taking mode.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
the invention discloses a geothermal water reservoir segment hole making method, which comprises the following steps:
s100, hydraulically directional perforation is carried out on a geothermal water reservoir section of a target well by a hydraulic ejector so that a pore space is formed in the geothermal water reservoir section;
s200, injecting explosive into the geothermal water reservoir section, and enabling the explosive to enter the pore space;
s300, closing the well;
s400, detonating the explosive after the well pressure of the target well is stabilized, so that the diameter of the geothermal water reservoir section is enlarged to a preset diameter.
Preferably, step S200 includes:
injecting explosive into the geothermal water reservoir section;
and injecting gas with a first preset pressure into the geothermal water reservoir section to enable the explosive to enter the pore space.
Preferably, before step S100, the method further includes:
fixing an outer sleeve in a target well;
and dividing the geothermal water reservoir section into N sections by adopting a plurality of packers according to the length of the geothermal water reservoir section.
Preferably, after step S100, before step S200, the method further includes:
injecting fracturing fluid with a second preset pressure into the geothermal water reservoir segment by adopting fracturing equipment so as to release the stress of the geothermal water reservoir segment;
flushing geothermal water reservoir sections.
Preferably, the fracturing fluid is active water.
Preferably, after step S200, before step S300, further includes:
sealing the explosive in the geothermal water reservoir section by adopting a packer;
a stabilizer is placed in the target well.
Preferably, after step S400, the method further includes:
s500, opening the well to release the bottom hole pressure of the target well.
Preferably, after step S500, the method further includes:
s600, flushing the target well.
The second aspect of the invention discloses a geothermal water heat exchange system, comprising: the device comprises a pump, a stop valve, a heat exchanger, a water inlet pipe, a water outlet pipe and heat exchange equipment;
the heat exchange equipment is formed by overlapping a plurality of compressed spiral hoses and is arranged in a geothermal water reservoir of the target well;
one end of the heat exchange equipment is communicated with the water inlet end of the pump through a water inlet pipe, and the water outlet end of the pump is connected with the water inlet end of the heat exchanger;
the water outlet end of the heat exchanger is connected with the other end of the heat exchange equipment through a water outlet pipe;
the stop valve is arranged on the water outlet pipe.
From the above, the invention discloses a geothermal water reservoir segment hole making method and a geothermal water heat exchange system. Firstly, carrying out hydraulic directional perforation on a geothermal water reservoir section of a target well through a hydraulic ejector so as to enable the geothermal water reservoir section to form a pore space, then injecting explosive into the geothermal water reservoir section, enabling the explosive to enter the pore space, finally closing the well, and detonating the explosive after the well pressure of the target well is stabilized so as to enable the diameter of the geothermal water reservoir section to be enlarged to a preset diameter. Through the geothermal water reservoir section hole making method disclosed by the application, the diameter of the geothermal water reservoir section of the target well can be effectively enlarged to the preset diameter, geothermal Tian Kongqiang is formed, and then the geothermal water heat exchange system of the compressed spiral hose is adopted for heat exchange, so that the geothermal heat utilization rate can be effectively increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a geothermal water reservoir segment hole making method according to an embodiment of the present invention;
FIG. 2 is a flow chart of the injection of explosives into void space provided by an embodiment of the present invention;
FIG. 3 is a flow chart of another method for creating a hole in a geothermal water reservoir segment according to an embodiment of the present invention;
FIG. 4 is a flow chart of another geothermal water reservoir segment hole making method provided in an embodiment of the present invention;
FIG. 5 is a flow chart of another method for creating a hole in a geothermal water reservoir segment according to an embodiment of the present invention;
FIG. 6 is a flow chart of another geothermal water reservoir segment hole making method provided in an embodiment of the present invention;
FIG. 7 is a schematic illustration of a hydraulic injector and fracturing equipment construction provided by an embodiment of the present invention;
FIG. 8 is a schematic diagram of a structure of a geothermal water reservoir after fracturing according to an embodiment of the present invention;
FIG. 9 is a schematic illustration of a geothermal water reservoir after injection of an explosive according to an embodiment of the present invention;
FIG. 10 is a schematic illustration of a target well flush provided by an embodiment of the present invention;
fig. 11 is a schematic diagram of a geothermal water heat exchange system installed in a target well according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The invention provides a geothermal water reservoir section hole making method and a geothermal water heat exchange system, which can obtain a geothermal water reservoir with a large aperture by the geothermal water reservoir section hole making method, and can effectively improve heat exchange area of a heat exchange medium and heat storage, improve geothermal circulation efficiency, increase return water temperature of a geothermal well, improve utilization rate of a single well and reduce cost of the geothermal well by arranging the geothermal water heat exchange system with a compressed spiral hose in the geothermal water reservoir with the large aperture.
An example of how a geothermal water reservoir with a large pore size is obtained, i.e. a geothermal water reservoir section hole making method, is described below.
Referring to fig. 1, 7 to 9, fig. 1 is a schematic flow chart of a geothermal water reservoir segment hole making method, and the geothermal water reservoir segment hole making method at least comprises the following steps:
and S100, hydraulically directional perforation is carried out on the geothermal water reservoir section of the target well by the hydraulic ejector, so that the geothermal water reservoir section forms a pore space.
S200, injecting explosive into the geothermal water reservoir section, and enabling the explosive to enter the pore space.
The explosive may be emulsion explosive or powder explosive, and those skilled in the art may choose the explosive according to the requirements.
S300, closing the well.
S400, detonating the explosive after the well pressure of the target well is stabilized, so that the diameter of the geothermal water reservoir section is enlarged to a preset diameter.
After the hydraulic ejector is adopted to conduct hydraulic directional perforation on the geothermal water reservoir section of the target well, a pore space can be formed, explosive is injected into the pore space, after the explosive is detonated, the diameter of the geothermal water reservoir section can be expanded to a preset diameter, the diameter of the geothermal water reservoir section can be expanded to the preset diameter, geothermal Tian Kongqiang can be formed, and the geothermal utilization rate is increased.
1, 7, 9 in FIGS. 7 and 8 each represent a packer, 2 represent a fracturing device, 3 represent a hydraulic injector, 4 represent a geothermal reservoir section, 5 represent an inner tube, 6 represent an outer casing, and 10 represent void space.
11 in fig. 9 represents a packer, 12 represents a stabilizer, and 13 represents an explosive and a lead wire.
In fig. 10, 14 represents cuttings, and 15 represents high-pressure fluid.
According to the embodiment of the invention, firstly, the geothermal water reservoir section of the target well is subjected to hydraulic directional perforation through the hydraulic ejector, so that the geothermal water reservoir section forms a pore space, then explosive is injected into the geothermal water reservoir section, the explosive enters the pore space, finally, the well is shut in, and the explosive is detonated after the well pressure of the target well is stabilized, so that the diameter of the geothermal water reservoir section is enlarged to a preset diameter. Through the geothermal water reservoir section hole making method disclosed by the application, the diameter of the geothermal water reservoir section of the target well can be effectively enlarged to the preset diameter, geothermal Tian Kongqiang is formed, and then the geothermal water heat exchange system of the compressed spiral hose is adopted for heat exchange, so that the geothermal heat utilization rate can be effectively increased.
Further, referring to fig. 2 and 9, in performing step S200, the specific implementation procedure of step S200 includes:
s201, explosive is injected into the geothermal water reservoir section.
S202, injecting gas with a first preset pressure into the geothermal water reservoir section to enable the explosive to enter the pore space.
It should be noted that, the explosive is injected into the geothermal water reservoir segment first, and then the gas of the first preset pressure is injected into the geothermal water reservoir segment, so that the explosive can be delivered to the pore space.
Specifically, referring to fig. 3 and 7, before step S100, that is, before performing the hydraulic injector to perform hydraulic directional perforation on the geothermal water reservoir segment of the target well so that the geothermal water reservoir segment forms a void space, the method further includes the steps of:
s1, fixing an outer sleeve in a target well.
The outer sleeve is fixed in the target well, so that the structure of the target well can be kept constant, and collapse can be avoided.
S2, dividing the geothermal water reservoir section into N sections by adopting a plurality of packers according to the length of the geothermal water reservoir section.
It should be noted that, according to the length of the geothermal water reservoir segment, the geothermal water reservoir segment is divided into N segments by using a plurality of packers, so that when step S100 is executed, that is, when the hydraulic injector performs hydraulic directional perforation on the geothermal water reservoir segments of different segments of the target well, it is possible to avoid that sandstone cuttings generated at the upper part are accumulated to the geothermal water reservoir segment with the lowest influence on the well bottom to form a void space.
Preferably, a plurality of packers are used to divide the geothermal water reservoir section evenly into N sections, depending on the length of the geothermal water reservoir section.
Further, referring to fig. 4, after step S100 is performed and before step S200 is performed, the following steps are further included:
s101, injecting fracturing fluid with a second preset pressure into the geothermal water reservoir segment by adopting fracturing equipment so as to release the stress of the geothermal water reservoir segment.
S102, flushing the geothermal water reservoir section.
The fracturing equipment is used for injecting fracturing fluid with second preset pressure into the geothermal water reservoir section so as to release stress of the geothermal water reservoir section, so that collapse of the geothermal water reservoir due to stress can be avoided, the geothermal water reservoir section is flushed, sandstone and rock scraps precipitated in a target well can be flushed out, and the influence of the sandstone and rock scraps on subsequent explosive injection is avoided.
Specifically, the fracturing fluid is active water.
It should be noted that the fracturing fluid may be active water or other fluids, and those skilled in the art may select the fracturing fluid according to the requirements.
Further, referring to fig. 5 and 9, after step S200 is performed and before step S300 is performed, the following steps are further included:
and S210, adopting a packer to pack the explosive in the geothermal water reservoir section.
S220, placing a stabilizer in the target well.
The packer is used for packing the explosive into the geothermal water reservoir section, and the stabilizer is placed in the target well, so that the upper casing can be prevented from being damaged after the explosive is detonated.
Further, referring to fig. 6, after step S400 is performed, that is, after the well pressure of the target well is stabilized, the explosive is detonated so that the diameter of the geothermal water reservoir is enlarged to a preset diameter, and further comprising:
s500, opening the well to release the bottom hole pressure of the target well.
The bottom hole pressure of the target well is released by opening the well, so that the collapse in the well caused by the excessive pressure in the well can be avoided.
Further, referring to fig. 6 and 10, after step S500 is performed, that is, after the bottom hole pressure of the target well is released by opening the well, the method further includes:
s600, flushing the target well.
It is to be noted that, wash the target well, can wash out the sandstone detritus that the explosion produced, avoid sandstone detritus to influence follow-up geothermal water heat transfer system's compressed spiral hose installation.
In addition, when flushing the target well, a high-pressure fluid is generally used for flushing.
Based on the above-mentioned geothermal water reservoir segment hole-making method, the embodiment of the invention also provides a geothermal water heat exchange system, referring to fig. 11, the geothermal water heat exchange system comprises: a shut-off valve 21, a pump 22, a heat exchanger 23, a water inlet pipe 26, a water outlet pipe 28 and a heat exchange device 29;
the heat exchange device 29 is formed by overlapping a plurality of compressed spiral hoses, and is arranged in a geothermal water reservoir of the target well;
one end of the heat exchange device 29 is communicated with the water inlet end of the pump 22 through the water inlet pipe 26, and the water outlet end of the pump 22 is connected with the water inlet end of the heat exchanger 23;
the water outlet end of the heat exchanger 23 is connected with the other end of the heat exchange device 29 through a water outlet pipe 28;
the shut-off valve 21 is provided at the outlet pipe.
It should be noted that, the heat exchange device 29 is formed by overlapping a plurality of compressed spiral hoses, so that not only can the blockage be prevented, but also the contact area of the heat exchange device 29 can be increased, the heat exchange efficiency can be improved, and the geothermal energy can be efficiently utilized.
Notably, 24 in fig. 11 represents an open-hole section of the well, 27 represents the outer wall of the well, and 210 represents the geothermal field reservoir.
By providing the stop valve 21 in the water outlet pipe, well shut-in can be performed when an emergency occurs.
It should be noted that, the heat exchange device 29 is filled with a refrigerant, that is, a heat exchange medium, and the heat exchange medium may be water, carbon dioxide or a mixture of carbon dioxide and nitrogen.
Through the geothermal water heat exchange system provided by the embodiment, the pump 22 can convey the refrigerant in the heat exchange device 29 to the heat exchanger 23, then exchange heat through the heat exchanger 23, exchange heat in the refrigerant and convey the heat to the user side, and the refrigerant after heat exchange enters the heat exchange device 29 again through the water outlet pipe for next heat exchange.
Preferably, the heat exchange device 29 is a PVC material with a thermal conductivity greater than 36W/(mXK).
Preferably, a temperature and pressure sensor 25 is also included, which is located downhole.
By providing the temperature and pressure sensor 25 in the underground, the underground temperature and pressure can be measured, and the influence of the underground temperature on the heat exchange efficiency of the heat exchange device can be avoided.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A geothermal water reservoir segment cavitation method, comprising:
s100, hydraulically directional perforation is carried out on a geothermal water reservoir section of a target well by a hydraulic ejector, so that a pore space is formed in the geothermal water reservoir section;
s200, injecting explosive into the geothermal water reservoir section, and enabling the explosive to enter the pore space;
s300, closing the well;
s400, detonating the explosive after the well pressure of the target well is stabilized, so that the diameter of the geothermal water reservoir section is enlarged to a preset diameter.
2. The geothermal water reservoir segment hole making method according to claim 1, wherein the step S200 comprises:
injecting explosive into the geothermal water reservoir segment;
and injecting gas with a first preset pressure into the geothermal water reservoir section to enable the explosive to enter the pore space.
3. The geothermal water reservoir segment hole making method according to claim 1, further comprising, prior to the step S100:
fixing an outer sleeve in a target well;
and dividing the geothermal water reservoir section into N sections by adopting a plurality of packers according to the length of the geothermal water reservoir section.
4. The geothermal water reservoir segment hole making method according to claim 1, further comprising, after the step S100, before the step S200:
injecting fracturing fluid with a second preset pressure into the geothermal water reservoir segment by adopting fracturing equipment so as to release the stress of the geothermal water reservoir segment;
and flushing the geothermal water reservoir section.
5. The geothermal water reservoir interval cavitation method of claim 4, wherein the fracturing fluid is active water.
6. The geothermal water reservoir segment hole making method according to claim 1, further comprising, after the step S200, before the step S300:
sealing the explosive in the geothermal water reservoir section by adopting a packer;
a stabilizer is placed in the target well.
7. The geothermal water reservoir segment hole making method according to claim 1, further comprising, after the step S400:
s500, opening the well to release the bottom hole pressure of the target well.
8. The geothermal water reservoir segment hole-making method of claim 7, further comprising, after the step S500:
and S600, flushing the target well.
9. A geothermal water heat exchange system, comprising: the device comprises a pump, a stop valve, a heat exchanger, a water inlet pipe, a water outlet pipe and heat exchange equipment;
the heat exchange equipment is formed by overlapping a plurality of compression type spiral hoses and is arranged in a geothermal water reservoir of the target well;
one end of the heat exchange equipment is communicated with the water inlet end of the pump through the water inlet pipe, and the water outlet end of the pump is connected with the water inlet end of the heat exchanger;
the water outlet end of the heat exchanger is connected with the other end of the heat exchange equipment through the water outlet pipe;
the stop valve is arranged on the water outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311287425.0A CN117365295A (en) | 2023-10-07 | 2023-10-07 | Geothermal water reservoir section cave making method and geothermal water heat exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311287425.0A CN117365295A (en) | 2023-10-07 | 2023-10-07 | Geothermal water reservoir section cave making method and geothermal water heat exchange system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117365295A true CN117365295A (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311287425.0A Pending CN117365295A (en) | 2023-10-07 | 2023-10-07 | Geothermal water reservoir section cave making method and geothermal water heat exchange system |
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| CN (1) | CN117365295A (en) |
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2023
- 2023-10-07 CN CN202311287425.0A patent/CN117365295A/en active Pending
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