CN109630070A - A method of the artificial heat storage of hot dry rock is built using natural geological fault - Google Patents
A method of the artificial heat storage of hot dry rock is built using natural geological fault Download PDFInfo
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- CN109630070A CN109630070A CN201811439415.3A CN201811439415A CN109630070A CN 109630070 A CN109630070 A CN 109630070A CN 201811439415 A CN201811439415 A CN 201811439415A CN 109630070 A CN109630070 A CN 109630070A
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Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
-
- 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
- E21B47/00—Survey of boreholes or wells
Abstract
The invention belongs to dry-hot-rock geothermal artificial heat storage building technology field, specifically a kind of method for building the artificial heat storage of hot dry rock using natural geological fault.Include the following steps and 1) determines fault parameter in dry-hot-rock geothermal development zone, quantity and size 2) and move towards to carry out well group layout design along target fault, well group arrangement is that " linear type " that a note two returns arranges pit shaft 3) injection well wellbore construction 4 is carried out in the center of target fault trend) combine the azimuth of major fault macro-scale determined by physical prospecting imaging technique and drilling that can accurately determine target fault occurrence 5) using target fault and neighbouring crushed zone as a cranny development, permeability is strong, the big natural artificial heat reservori 6 of heat exchange area) from injection well inject a large amount of normal-temperature water, by target fault, this natural artificial heat storage fracture network carries out heat exchange, realize solid state heat to liquid heat deflection, and high-temperature water and overheated steam are produced from producing well and is used to generate electricity or heat.
Description
Technical field
It is specifically a kind of to be built using natural geological fault the invention belongs to dry-hot-rock geothermal artificial heat storage building technology field
The method for making the artificial heat storage of hot dry rock.
Background technique
The exploitation and use for developing heavy dependence fossil energy of world economy, but the use of fossil energy can bring a system
Column environmental problem.People's an urgent demand taps a new source of energy, and geothermal energy has relative to clean energy resourcies such as solar energy, wind energy, water energys
The not overwhelming dominance of climate and seasonal effect, the contained reserves of hot dry rock in the earth's crust be equivalent to global natural gas, coal,
30 times of petroleum total amount.Hot dry rock (hot dry rock), which refers to, to be buried in 3~10km of underground, and 150 DEG C~650 DEG C of temperature are free of
Or it is micro- containing non-mobile water and the very poor high heat rock mass of permeability.Artificial heat storage is i.e. by existing technology to hot dry rock reservoir rock mass
Permeability transformation is carried out, Fracture Networks abundant is formed, makes there are enough heat exchange areas between heat transport fluid and high heat rock mass.
The construction of artificial heat storage is that the solid state heat in developing dry-hot-rock geothermal is changed into where the key technology of fluidised form heat, is directly determined
The effect and success or failure of dry-hot-rock geothermal engineering.
It facts have proved that hydraulic fracturing technology achieves in conventional gas and unconventional energy resource exploitation reservoir reconstruction field
Relatively good effect, but developed in manually heat storage construction in dry-hot-rock geothermal, since hot dry rock buries relatively deep, crustal stress height,
And preservation is in igneous rock, thus hydraulic fracturing technology is required relatively high, existing technology and equipment are unable to satisfy engineering and need
It asks, the difficulty that the artificial heat storage of hot dry rock is built in hydraulic fracturing is larger；Secondly the crack that hydrofracturing technology generates is single, heat-transfer surface
Product is limited, these all restrict dry-hot-rock geothermal exploitation and move towards commercialization.
According to the hot Tian Tezheng of underground heat and its origin cause of formation, we know: most of underground heat preservations are in continental plate edge or plate
Block and plate junction, geological activity is active, tomography, joint structure development, and the slit band or crushed zone naturally occurred is more.
The imperfect tape (crushed zone, fissure zone) and fault crevice development belt that make full use of these primary, can be with as artificial heat storage
Underground heat production efficiency is improved, cost of winning is reduced.
Currently, there are five types of acknowledged hot dry rock structuring concept models: Holocene Activities Volcanic-type hot dry rock construction
Conceptual model, Lower crustal melting figure hot dry rock structuring concept model, radioactive decay heat source type hot dry rock structuring concept model,
Large Scale Strike Slip tomography type hot dry rock structuring concept model, graben-geochronology of rift-type hot dry rock structuring concept model.Height involved in China
Warm rock mass underground heat is in continental plate actively band, and Large Scale Strike Slip tomography type hot dry rock structuring concept model has typical generation
Table.Large Scale Strike Slip tomography type dry-hot-rock geothermal exceptions area certainly exists one large-scale natural fault and crack crushed zone, therefore needle
The joint that can utilize its natural tomography and near Faults is built to the artificial heat storage of Large Scale Strike Slip tomography type dry-hot-rock geothermal
Fissure zone overcomes as natural artificial heat reservori and builds the shortcomings that artificial heat of hot dry rock is stored up with fracturing technique, reduce ground
Heat exploitation commercial cost.
Summary of the invention
The present invention mentions to provide a kind of method of artificial heat storage of construction hot dry rock using large-scale geological fault structure feature
For a kind of method for building the artificial heat storage of hot dry rock using natural geological fault.
The present invention takes following technical scheme: a method of the artificial heat storage of hot dry rock being built using natural geological fault,
Include the following steps, 1) dry-hot-rock geothermal developing zone is selected according to physical prospecting means in hot dry rock survey and exploitation target target area,
And determine fault parameter, quantity and size in dry-hot-rock geothermal development zone.
2) 200 DEG C of selected temperature or more of the maximum tomography in dry-hot-rock geothermal developing zone, i.e. target fault, and along mesh
Mark fault strike and carry out well group layout design, well group arrangement is that a note two " linear type " returned arranges pit shaft, producing well with
Injection well spacing is L, and injection well is at center, and two mouthfuls of producing wells are in injection well two sides, totally three pit shafts.
3) injection well wellbore construction is carried out in the center of target fault trend, creeps into when drilling well to rock temperature and reaches
150 DEG C and start thermometric, coring, drilling and stop drilling behind target fault region until reaching, continues thereafter with construction production
Well, and construction working is carried out by injection well arrangement and method for construction.
4) geological record is carried out to the rock core obtained in drilling process, it can essence by inspection instrument for borehole borehole imaging technology
It really observes tomography quantity, inclination angle and the thickness on the wall of a borehole, and combines major fault macroscopic view ruler determined by physical prospecting imaging technique
The azimuth of degree and drilling can accurately determine target fault occurrence.
5) it is worked out according to physical prospecting result and geology, using target fault and neighbouring crushed zone as a cranny development, infiltration
Property the big natural artificial heat reservori of strong, heat exchange area.
6) a large amount of normal-temperature water is injected from injection well, this natural artificial heat storage fracture network carries out by target fault
Heat exchange, realization solid state heat produce high-temperature water and overheated steam from producing well and are used to generate electricity or supply to liquid heat deflection
It is warm.
In the step 2, the pit shaft of " linear type " arrangement is evenly distributed on the target within the scope of dry-hot-rock geothermal development zone
On fault strike direction, group wells center is the middle part that injection well is located at dry-hot-rock geothermal development zone target fault trend, producing well
The two sides in direction are moved towards positioned at target fault, the distance of injection well to producing well is L=1000m~2000m, and all drilling wells are all bored
To target fault region.
Compared with prior art, the present invention makes full use of Large Scale Strike Slip this natural fault of tomography type hot dry rock and nearby breaks
It splits band and serves as the artificial heat reservori that permeability between group wells is strong, cranny development, heat exchange area are big, solve and opened in dry-hot-rock geothermal
Hydraulic fracturing initial cracking pressure is big in hair, the uncontrollable problem of fracturing crack propagation direction, reduce artificial heat storage construction cost and
Difficulty realizes the commercialization of dry-hot-rock geothermal exploitation.
Detailed description of the invention
Fig. 1 is that Large Scale Strike Slip tomography type dry-hot-rock geothermal develops schematic three dimensional views；
Fig. 2 is the artificial heat reservori B-B diagrammatic cross-section of Large Scale Strike Slip tomography type hot dry rock；
Fig. 3 is that linear type drilling well is arranged and artificial heat stores up range A-A diagrammatic cross-section；
In figure: 1- injection well, 2- producing well, 3- target fault (large-scale geological fault), the artificial heat reservori of 4-, 5- dry-hot-rock geothermal
Development zone, 6- crushed zone.
Specific embodiment
Below with reference to Fig. 1, Fig. 2, Fig. 3, the present invention will be further described.
It is determined as Large Scale Strike Slip tomography type hot dry rock structure through geologic prospect, multi-argument in the area of geothermal anomaly of certain delineation
Conceptual model is made, is now intended to carry out dry-hot-rock geothermal exploitation in this area, builds the artificial heat storage of hot dry rock using natural geological fault
Specific step is as follows:
1) dry-hot-rock geothermal developing zone 5 is selected according to physical prospecting means in hot dry rock survey and exploitation target target area, and determine dry
Fault parameter, quantity and size in Re Yan geothermal exploitation area 5, physical prospecting means are chosen can be according to " three high " (the high electricity of hot dry rock
Conductance, tall and big Telluric heat flow value, high radioactivity are abnormal), " one is low " (low velocity of wave) and " two is abnormal " (magnetic anomalies, gravity anomaly) adopt
The method combined with weight magnetic method, telluric electromagnetic sounding, earthquake ambient noise tomography with gamma-ray spectral measurement,
Magnetic method and magnetotelluric method are wherein weighed in mineral prospecting with extensive and mature, earthquake ambient noise tomography is extensive
Research and gamma-ray spectral measurement applied to earth's internal structure are usually used in the rock radioactive element in areal geology
The measurement of content.
2) 200 DEG C of selected temperature or more of the maximum tomography in dry-hot-rock geothermal developing zone 5, i.e. target fault 3, and edge
Target fault 3 is moved towards to carry out well group layout design, and well group arrangement is that " linear type " that a note two returns arranges pit shaft, pit shaft packet
A bite injection well 1 and two mouthfuls of producing wells 2 are included, producing well 2 and 1 spacing of injection well are L, and injection well exists in center, two mouthfuls of producing wells
Injection well two sides, the pit shaft of " linear type " arrangement are evenly distributed on the trend of the target fault 3 within the scope of dry-hot-rock geothermal development zone
On direction, injection well 1 is located at the middle part of the trend of dry-hot-rock geothermal development zone target fault 3, and two mouthfuls of producing wells 2 are located at target
Tomography 3 moves towards the two sides in direction, and the distance of injection well 1 to producing well 2 is L=1000m~2000m, and all drilling wells are all drilled into target
3 region of tomography.
3) 1 wellbore construction of injection well is carried out in the center that target fault 3 is moved towards, creeps into when drilling well to rock temperature and reaches
To 150 DEG C and start thermometric, coring, drilling the stopping drilling after reaching 3 region of target fault, continues thereafter with construction life
Well 2 is produced, and carries out construction working by 1 arrangement and method for construction of injection well.
4) geological record is carried out to the rock core obtained in drilling process, it can essence by inspection instrument for borehole borehole imaging technology
It really observes tomography quantity, inclination angle and the thickness on the wall of a borehole, and combines major fault macroscopic view ruler determined by physical prospecting imaging technique
The azimuth of degree and drilling can accurately determine 3 occurrence of target fault.
5) it is worked out according to physical prospecting result and geology, regard target fault 3 and nearby crushed zone 5 as a cranny development, seeps
The natural artificial heat reservori 4 that permeability is strong, heat exchange area is big.
6) a large amount of normal-temperature water is injected from injection well 1, this natural artificial heat storage fracture network carries out by target fault 3
Heat exchange, realization solid state heat produce high-temperature water and overheated steam from producing well 2 and are used to generate electricity or supply to liquid heat deflection
It is warm.
Claims (2)
1. a kind of method for building the artificial heat storage of hot dry rock using natural geological fault, it is characterised in that: include the following steps,
1) it is selected dry-hot-rock geothermal developing zone (5), and determined according to physical prospecting means in hot dry rock survey and exploitation target target area
The interior fault parameter in dry-hot-rock geothermal development zone (5), quantity and size；
2) in 200 DEG C of dry-hot-rock geothermal developing zone (5) interior selected temperature or more of maximum tomography, i.e. target fault (3), and edge
Target fault (3) is moved towards to carry out well group layout design, and well group arrangement is that " linear type " that a note two returns arranges pit shaft, pit shaft
Including injection well (1) and producing well (2), producing well (2) and injection well (1) spacing are L, and injection well is in center, two mouthfuls of producing wells
In injection well two sides, totally three pit shafts；
3) injection well (1) wellbore construction is carried out in the center of target fault (3) trend, creeps into when drilling well to rock temperature and reaches
To 150 DEG C and start thermometric, coring, drilling the stopping drilling after reaching target fault (3) region, continues thereafter with construction
Producing well (2), and construction working is carried out by injection well (1) arrangement and method for construction；
4) geological record is carried out to the rock core obtained in drilling process, can be accurately seen by inspection instrument for borehole borehole imaging technology
Tomography quantity and the thickness on the wall of a borehole are measured, and combines the azimuth of physical prospecting imaging technique and drilling that can accurately determine mesh
Mark tomography (3) occurrence；
5) it is worked out according to physical prospecting result and geology, regard target fault (3) and nearby crushed zone (5) as a natural artificial heat storage
Layer (4)；
6) a large amount of normal-temperature water is injected from injection well (1), this natural artificial heat storage fracture network carries out by target fault (3)
Heat exchange, realize solid state heat to liquid heat deflection and from producing well (2) produce high-temperature water and overheated steam and for generating electricity or
Heating.
2. the method according to claim 1 for building the artificial heat storage of hot dry rock using natural geological fault, it is characterised in that:
In the step 2, the pit shaft of " linear type " arrangement is evenly distributed on the target fault (3) within the scope of dry-hot-rock geothermal development zone
It moves towards on direction, group wells center is the middle part that injection well (1) is located at dry-hot-rock geothermal development zone target fault (3) trend, production
Well (2) is located at the two sides that target fault (3) moves towards direction, the distance of injection well (1) to producing well (2) be L=1000m~
2000m, all drilling wells are all drilled into target fault (3) region.
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Cited By (9)
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|---|---|---|---|---|
| CN110006185A (en) * | 2019-04-18 | 2019-07-12 | 重庆科技学院 | Dry-hot-rock geothermal recovery method |
| CN110242255A (en) * | 2019-06-19 | 2019-09-17 | 太原理工大学 | The method of volume increase coal bed gas is combined in a kind of heat injection decomposition with microbial degradation |
| CN111561297A (en) * | 2020-05-18 | 2020-08-21 | 中国矿业大学 | Coal-geothermal water collaborative mining method based on fault water-flowing fractured zone |
| CN112431578A (en) * | 2020-12-02 | 2021-03-02 | 山西潞安环保能源开发股份有限公司常村煤矿 | Method for extracting mine gas from low-permeability coal seam containing fault |
| CN112984849A (en) * | 2021-03-22 | 2021-06-18 | 太原理工大学 | Cold and military system karst heat storage and metamorphic rock stratum fracture type heat storage geothermal development method |
| CN113389537A (en) * | 2021-06-29 | 2021-09-14 | 太原理工大学 | Hot dry rock geothermal exploitation method for filling thermal reservoir in later stage of deep crack |
| CN114086935A (en) * | 2020-08-05 | 2022-02-25 | 中国石油化工股份有限公司 | Geothermal system heat storage pressure fracture network design method, device and storage medium |
| CN114413494A (en) * | 2022-01-14 | 2022-04-29 | 金当量能源科技(山东)有限公司 | Hot dry rock heat energy utilization collection system |
| CN115191279A (en) * | 2022-07-13 | 2022-10-18 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Method for cross-season energy storage heating and ecological planting |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006185A (en) * | 2019-04-18 | 2019-07-12 | 重庆科技学院 | Dry-hot-rock geothermal recovery method |
| CN110006185B (en) * | 2019-04-18 | 2021-03-30 | 重庆科技学院 | Hot dry rock geothermal exploitation method |
| CN110242255A (en) * | 2019-06-19 | 2019-09-17 | 太原理工大学 | The method of volume increase coal bed gas is combined in a kind of heat injection decomposition with microbial degradation |
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| CN111561297A (en) * | 2020-05-18 | 2020-08-21 | 中国矿业大学 | Coal-geothermal water collaborative mining method based on fault water-flowing fractured zone |
| CN111561297B (en) * | 2020-05-18 | 2021-03-30 | 中国矿业大学 | Coal-geothermal water collaborative mining method based on fault water-flowing fractured zone |
| CN114086935A (en) * | 2020-08-05 | 2022-02-25 | 中国石油化工股份有限公司 | Geothermal system heat storage pressure fracture network design method, device and storage medium |
| CN112431578A (en) * | 2020-12-02 | 2021-03-02 | 山西潞安环保能源开发股份有限公司常村煤矿 | Method for extracting mine gas from low-permeability coal seam containing fault |
| CN112431578B (en) * | 2020-12-02 | 2022-07-29 | 山西潞安环保能源开发股份有限公司常村煤矿 | Method for extracting mine gas from low-permeability coal seam containing fault |
| CN112984849A (en) * | 2021-03-22 | 2021-06-18 | 太原理工大学 | Cold and military system karst heat storage and metamorphic rock stratum fracture type heat storage geothermal development method |
| CN113389537A (en) * | 2021-06-29 | 2021-09-14 | 太原理工大学 | Hot dry rock geothermal exploitation method for filling thermal reservoir in later stage of deep crack |
| CN114413494A (en) * | 2022-01-14 | 2022-04-29 | 金当量能源科技(山东)有限公司 | Hot dry rock heat energy utilization collection system |
| CN115191279A (en) * | 2022-07-13 | 2022-10-18 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Method for cross-season energy storage heating and ecological planting |
| CN115191279B (en) * | 2022-07-13 | 2024-02-23 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Cross-season energy storage heating and ecological planting method |
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Application publication date: 20190416 |