CN106968661A - It is a kind of to strengthen the completion method of hot water type geothermal system - Google Patents
It is a kind of to strengthen the completion method of hot water type geothermal system Download PDFInfo
- Publication number
- CN106968661A CN106968661A CN201710132946.7A CN201710132946A CN106968661A CN 106968661 A CN106968661 A CN 106968661A CN 201710132946 A CN201710132946 A CN 201710132946A CN 106968661 A CN106968661 A CN 106968661A
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- Prior art keywords
- geothermal
- reservoir
- hot water
- branch
- water type
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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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B7/04—Directional drilling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T2010/50—Component parts, details or accessories
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- 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
Strengthen hot water type geothermal system completion method there is provided one kind the present invention relates to geothermal exploitation field.This method drills geothermal reservoir first, utilize microseism technology, carry out stratum micro resistor and inclination angle combination logging, recognize formation fracture development direction, then branch well hole is being drilled through along the vertical direction of fracture development, pressure break is being carried out to branch's well section using hydraulic fracturing technology, so as to build Thief zone geothermal reservoir, formation fluid is set to enter along post-fracturing crack in pit shaft, fluid is exploited by pit shaft and generated electricity to ground.This method makes full use of Multilateral Wells, microseismic detection and processing system and hydraulic fracturing technology, reservoir is simultaneously opened to greatest extent in effective identification geothermal reservoir crack, the geothermal energy of geothermal reservoir is taken full advantage of, the production efficiency to hot water type geothermal energy resources is substantially increased.
Description
Technical field
The present invention relates to geothermal energy development field, a kind of enhancing hot water type geothermal system completion method is specifically related to.
Background technology
In the 1970s, after Global Oil crisis outburst, scientist just proposes to utilize geothermal energy in the high heat rock mass of deep
The conception generated electricity.Underground heat is one of promising regenerative resource of tool, with other new energy such as solar energy, wind energy and biology
Mass-energy is compared, with distribution it is wide, by ectocine it is small (as round the clock, wind speed, the temperature difference), carbon emission amount and the low spy of maintenance cost
Point.Geothermal energy resources are due to that the huge heat energy that thermonuclear reaction is discharged occurs for the radioactive substance inside the earth's core, and these heat energy lead to
Cross a kind of sustainable clean energy resource that the carriers such as rock stratum, tomography reach heat shallow crust formation.
Geothermal energy resources refer under current techniques economy and geological conditions, can be from earth's crust clinical practice, reasonably open
The useful constituent of thermal energy in thermal energy, geothermal fluid and its association in the rock issued.Geothermal energy can be divided by attribute
For 4 types：(1) high-temperature-hot-water or hydro-thermal steam seen by the shallow place (underground 100m-4500m) of hot water type, the i.e. earth；(2)
Press geothermal energy, i.e., the high-temperature, high pressure fluid existed in some great sedimentary basins depths (underground 3km-6km), wherein containing in ground
A large amount of methane gas；(3) dry-hot-rock geothermal energy, is because special geologic condition causes high temperature but few water even anhydrous hot dry rock
Body, its heat energy could be taken out by needing the method for manually water filling；(4) magma heat energy, that is, be stored in high temperature (700 DEG C -2000 DEG C)
The huge heat energy in magma body is melted, but how to be developed at present still in the exploratory stage.
The deep earth heart energy is drilled by drilling well, by hydraulic fracturing technology in geothermal reservoir rock it is increased
Man-made fracture, the crack gone out by pressure break is sent out by the high-temp liquid exploitation in geothermal reservoir to ground, high-temp liquid into heating power
Electric installation is generated electricity.Geothermal energy resources bury depth, and porosity and permeability is minimum, when carrying out geothermal exploitation, it is necessary to carry out big
High the flow domain between the hydraulic fracturing transformation of scale, artificial constructed injection-production well, just can be by underground heat output.
Nowadays the specific method developed to geothermal energy resources is less, and practical operation difficulty is big：(1) volume fracturing is followed certainly
Ring method, although very high heat transference efficiency can be reached in theory, but be difficult to grasp docking and the pressure with control crack
Control problem；(2) natural circulation method is difficult the problem that flows to that hot fluid is taken in control, and although round casing programme adds stream
Body, in the heat transfer time of reservoir, but is difficult successfully under existing drilling technology.In addition, existing technology is solved
All it is the mining problem of hot dry rock, the present invention proposes the recovery method for geothermal resource of hydrothermal type.
Based on Multilateral Wells technology and hydraulic fracturing technology, the detection in direction is developed to formation fracture with reference to microseism technology, then
Plus the successful experience of oil gas well drilling.
The content of the invention
Strengthen hot water type geothermal system completion method object of the present invention is to provide one kind, by drilling straight-hole
The angle that sidetracking goes out between two mouthfuls of branch horizontal wells, two mouthfuls of branch horizontal wells is 180 °, then carries out multistage to branch horizontal well
Waterpower acid fracturing, man-made fracture is constructed in geothermal reservoir rock, and flowing into pit shaft for the high-temperature water in geothermal reservoir provides
Flow channel, ground is produced by high-temperature-hot-water, realizes that the exploitation to geothermal energy is utilized.
The technical scheme is that：One kind enhancing hot water type geothermal system completion method, is comprised the following steps that：
(1) a high temperature geothermal reservoir is chosen, geothermal reservoir top is drilled into using Conventional drilling equipment, resistance to height is then used instead
Warm drilling equipment continues downwards drilling, and geothermal reservoir medium position is got into always；
(2) pull out of hole, tripping in surface pipe and protective casing are cemented the well from high temperature cement slurry, while in shaft bottom tripping in envelope
Every device；
(3) bored under, carry out stratum micro resistor and inclination angle combination logging, identification formation fracture development direction；
Direction is developed according to formation fracture, a bite branch horizontal well direction is determined, branch horizontal well direction and the formation fracture of design are sent out
Educate direction vertical；
(4) determine behind branch horizontal well direction, using high temperature resistant drilling tool to straight well pit shaft carry out sidetracking, and along perpendicular to
A bite branch horizontal well is bored in formation fracture development direction, is cemented the well using high temperature cement slurry；
(5) after well cementation terminates, multistage waterpower acid fracturing is carried out to branch horizontal well, constructed in geothermal reservoir rock
Man-made fracture；
(6) after the completion of the well cementation of Multilateral Wells, multistage hydraulic fracturing are carried out, then to the opposite direction of the well another is bored
Branch horizontal well, well cementation carries out same multistage hydraulic fracturing, and two mouthfuls of branch horizontal wells of formation are also known as double branch levels
Well, the angles of Liang Koujing planar are 180 °；
(7) in geothermal reservoir after the completion of bi-lateral horizontal well well cementation, hydraulic fracturing, well head is installed on ground, and utilization is taken out
Sucking pump auxiliary exploits the high-temp liquid in underground geothermal reservoir to ground, carries out thermal power generation.
Above-mentioned complete system implementation steps can realize the efficient utilization to geothermal resource of hydrothermal type, and this process is
Strengthen hot water type geothermal system completion method.
The completion method of the present invention has the beneficial effect that：1. Thief zone is formed in geothermal reservoir using hydraulic fracturing technology
Property man-made fracture, using the crack in formation rock as fluid passage gather thermal fluid in formation, fluid come from stratum, with stratum
Heat exchange fully, avoids the low deficiency of conventional self-loopa exploitation pattern heat transference efficiency；2. in geothermal reservoir same depth
Place gets out two mouthfuls of branch horizontal wells, compared with single well hot water when conventional underground heat is exploited, and two mouthfuls of Multilateral Wells provide two streams
Body passage, discharge capacity is doubled, efficiency high；3. two mouthfuls of brill is mutually 180 ° of branch horizontal well at geothermal reservoir same depth,
Two mouthfuls of wells are mutually 180 ° in the both sides of straight well respectively, and the design maximizes the control area of every mouth horizontal well in the plane,
More fully exploitation utilizes Formation heat；4. the structure design for bi-lateral horizontal well being got out in a bite straight well has many advantages,
The control area of water acquisition efficiency and individual well in horizontal plane is added compared with the structure design of single horizontal well；If two mouthfuls of design is solely
Vertical horizontal well needs to bore two straight well sections and two horizontal segments, and the design bi-lateral horizontal well only needs to bore a straight well
Section, two horizontal segments, a straight well section is bored in the design less compared with two mouthfuls of independent horizontal wells, reduces drilling cost, so that
Reduce the cost of winning of geothermal energy.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the present invention.
1 surface pipe, 2 protective casings, 3 geothermal reservoirs 3,4 preforation tunnels, 5 cracks seam net, 6 packers, 7 Horizontal Wells
Eye, 8 straight well wells.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
One kind enhancing hot water type geothermal system completion method, is comprised the following steps that：
(1) geothermal reservoir of hot water type is chosen, in drilling well necessarieses such as reservoir ground region rigging ups, diameter is used
The top of geothermal reservoir 3 is pierced for Φ 604mm drill bit, then the middle part of geothermal reservoir 3 is pierced from size high-temperature resistant drill bit, under
Enter a diameter of Φ 503mm surface pipe 1, until in the middle part of hot dry rock reservoir, cement slurry cementing is injected, while in shaft bottom tripping in envelope
Every device 6；
(2) stratum micro resistor and inclination angle group are carried out by using wireless acquisition system and three-component geophone
Well logging is closed, is combined and surveyed using the stratum microresistivity scan image microseism waveform and stratigraphic dip of the geothermal reservoir 3 of acquisition
Well, carries out back analysis to the formation fracture development direction of the geothermal reservoir 3, according to back analysis result, determines describedly
The formation fracture development direction of heat reservori 3；
(3) direction is developed according to formation fracture, determines the direction of a bite branch horizontal well well 7, the branch horizontal well of design
The direction of well 7 is vertical with formation fracture development direction；
(4) determine behind the direction of branch horizontal well well 7, using Casing Sidetracking Technology, using a diameter of Φ 337mm's
Drill bit bores branch levels well section, drills through 1 horizontal well well 7 to the vertical direction of fracture development, and utilize geosteering drilling tool
The inclination angle of controlled level well well 7 is less than 5 °, is drilled to the horizontal section wellbore that length is 2000m, and utilize high heat conduction high temperature resistant cement
Slurry well cementation；
(5) after cementing the well, perforating job is carried out in long 2000m net horizontal section, cluster Perforation is penetrated at interval of certain distance
Eye 4；
(6) staged fracturing of horizontal well technology is used, multistage waterpower acid fracturing is carried out to reservoir branch well section, by using
High-pressure pump on ground injects the acidifying water of finite concentration proppant, the acidifying water water containing finite concentration proppant into reservoir
Entered by preforation tunnel 4 in formation rock, by the pressure of ground high-pressure pump, rock is crushed to form crack seam net 5, simultaneously
Acidifying water can also melt the rock of certain volume, ultimately form effective hydraulically created fracture seam net 5, for exploitation geothermal reservoir 3
In hot fluid provide passage；
(7) after the completion of the well cementation of Multilateral Wells, multistage hydraulic fracturing are carried out, then to the opposite direction of the well another is bored
Branch horizontal well, well cementation carries out same multistage hydraulic fracturing, and two mouthfuls of branch horizontal wells of formation are also known as double branch levels
Well, the angles of Liang Koujing planar are 180 °；
(8) in geothermal reservoir 3 after the completion of bi-lateral horizontal well well cementation, hydraulic fracturing, well head is installed on ground and the dress that generates electricity
The standby rear exploitation hot fluid of geothermal reservoir 3 that carries out is generated electricity.
Claims (4)
1. one kind enhancing hot water type geothermal system completion method, it is characterised in that：In geothermal reservoir bore bi-lateral horizontal well it
Before, obtain the formation fracture development direction of the geothermal reservoir；Direction is developed according to the formation fracture, a bite branch water is determined
Horizontal well direction；After the branch horizontal well completion, horizontal direction multistage hydraulic fracturing is carried out.
2. a kind of enhancing hot water type geothermal system completion method according to claim 1, it is characterised in that obtain describedly
The formation fracture development direction of heat reservori includes：Obtain the stratum microresistivity scan image of the geothermal reservoir；Obtain described
The stratigraphic dip combination logging of geothermal reservoir；Stratum microresistivity scan image and stratum using the geothermal reservoir of acquisition
Inclination angle combination logging, back analysis is carried out to the formation fracture development direction of the geothermal reservoir；According to back analysis result, really
The formation fracture development direction of the fixed geothermal reservoir.
3. a kind of enhancing hot water type geothermal system completion method according to claim 1, it is characterised in that：Branch's water
Horizontal well direction is vertical with formation fracture development direction.
4. a kind of enhancing hot water type geothermal system completion method according to claim 1, it is characterised in that：Described pair of branch
The angle of two mouthfuls of wells is into 180 ° in horizontal well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710132946.7A CN106968661A (en) | 2017-03-06 | 2017-03-06 | It is a kind of to strengthen the completion method of hot water type geothermal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710132946.7A CN106968661A (en) | 2017-03-06 | 2017-03-06 | It is a kind of to strengthen the completion method of hot water type geothermal system |
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| Publication Number | Publication Date |
|---|---|
| CN106968661A true CN106968661A (en) | 2017-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710132946.7A Pending CN106968661A (en) | 2017-03-06 | 2017-03-06 | It is a kind of to strengthen the completion method of hot water type geothermal system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278787A (en) * | 2018-01-04 | 2018-07-13 | 河北绿源地热能开发有限公司 | A kind of high efficiency of energy based on geothermal exploitation well utilizes winning apparatus and method |
| CN109505577A (en) * | 2018-11-12 | 2019-03-22 | 重庆科技学院 | Hot dry rock recovery method |
| CN111237146A (en) * | 2020-01-14 | 2020-06-05 | 西南石油大学 | Geothermal branch well constant temperature difference power generation system |
| CN111520110A (en) * | 2019-02-02 | 2020-08-11 | 中国石油天然气股份有限公司 | Supercritical CO of horizontal well2Method and system for developing enhanced geothermal energy by fracturing |
| CN112524829A (en) * | 2020-10-15 | 2021-03-19 | 中国科学院武汉岩土力学研究所 | Heat exchange working medium recyclable same-well heat recovery method |
| CN113009578A (en) * | 2019-12-19 | 2021-06-22 | 新奥科技发展有限公司 | Well bore track acquisition method of production well and communication method of production well |
-
2017
- 2017-03-06 CN CN201710132946.7A patent/CN106968661A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278787A (en) * | 2018-01-04 | 2018-07-13 | 河北绿源地热能开发有限公司 | A kind of high efficiency of energy based on geothermal exploitation well utilizes winning apparatus and method |
| CN109505577A (en) * | 2018-11-12 | 2019-03-22 | 重庆科技学院 | Hot dry rock recovery method |
| CN109505577B (en) * | 2018-11-12 | 2020-09-29 | 重庆科技学院 | Method for exploiting dry hot rock |
| CN111520110A (en) * | 2019-02-02 | 2020-08-11 | 中国石油天然气股份有限公司 | Supercritical CO of horizontal well2Method and system for developing enhanced geothermal energy by fracturing |
| CN111520110B (en) * | 2019-02-02 | 2022-06-03 | 中国石油天然气股份有限公司 | Supercritical CO of horizontal well2Method and system for developing enhanced geothermal energy by fracturing |
| CN113009578A (en) * | 2019-12-19 | 2021-06-22 | 新奥科技发展有限公司 | Well bore track acquisition method of production well and communication method of production well |
| CN113009578B (en) * | 2019-12-19 | 2022-11-08 | 新奥科技发展有限公司 | Well bore track acquisition method of production well and communication method of production well |
| CN111237146A (en) * | 2020-01-14 | 2020-06-05 | 西南石油大学 | Geothermal branch well constant temperature difference power generation system |
| CN112524829A (en) * | 2020-10-15 | 2021-03-19 | 中国科学院武汉岩土力学研究所 | Heat exchange working medium recyclable same-well heat recovery method |
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Legal Events
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170721 |
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| WD01 | Invention patent application deemed withdrawn after publication |