CN107366531B - One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method - Google Patents
One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method Download PDFInfo
- Publication number
- CN107366531B CN107366531B CN201710725013.9A CN201710725013A CN107366531B CN 107366531 B CN107366531 B CN 107366531B CN 201710725013 A CN201710725013 A CN 201710725013A CN 107366531 B CN107366531 B CN 107366531B
- Authority
- CN
- China
- Prior art keywords
- well
- inclined shaft
- horizontal
- borehole track
- opens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003032 molecular docking Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000013508 migration Methods 0.000 claims abstract description 11
- 230000005012 migration Effects 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 7
- 239000004927 clay Substances 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims 1
- 210000003128 head Anatomy 0.000 description 25
- 230000000694 effects Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B7/06—Deflecting the direction of boreholes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
It is provided by the invention a kind of based on the horizontal docking style geothermal well borehole track of inclined shaft and design method, the following steps are included: the first step, position and the coordinate of the well head A of inclined shaft and the well head B of horizontal engineering well are determined according to the size of construction area, shape, distance d1 between the two is calculated according to the coordinate of well head A and well head B, the reserve migration distance d2 of slanted well bores track is determined further according to distance d1；Second step determines the borehole track of inclined shaft；Third step determines horizontal engineering well borehole track；The present invention is by opening S202 sections of implementation reserve migrations to inclined shaft two, produce reserve migration distance d2, make d1+d2 >=250m, effectively increase underground connection docking distance, it ensures going on smoothly for two wells connection operation, is created condition for city narrow and small place using horizontal docking style geothermal well technological development mid-deep strata geothermal resource of hydrothermal type；It solves the problems, such as existing geothermal resource of hydrothermal type development scheme " both having taken heat or water intaking ", is truly realized the purpose of " heat is only taken not fetch water ".
Description
Technical field
The invention belongs to geothermal energy development technical fields, are related to a kind of based on the horizontal docking style geothermal well borehole track of inclined shaft
And design method.
Background technique
There are three types of modes for the exploitation of the domestic deep layer geothermal resource of hydrothermal type of centering at present: the first is to bore a bite straight well, from
In direct extraction geothermal water, not recharge；Second is to bore a bite straight well as extraction well, and more mouthfuls of straight wells are bored as recharge in periphery
Well, extraction are combined with recharge；The third is to bore a bite straight well, and the tripping in concentric tube in well is cold using carrying out inside and outside concentric tube
Hot water circuit heat exchange.These three Development Finances have the following problems: 1. all by aqueous heat reservori (sandstone layer) layer as a purpose,
The aqueous complete well of heat reservori tripping in filter pipe (filter pipe is made of stainless steel outer packed water strainer after seamless steel cased bore-bole), thus well
Do not completely cut off between cylinder and heat reservori, there are hydraulic connections；2. there is different degrees of direct or indirect groundwater abstraction, and it is excessive
Groundwater abstraction easily leads to surface subsidence aggravation, ground fissure activity increases；3. being influenced by formation properties, recharge underground water effect is owed
It is good, it is difficult to reach and adopt filling balance, while recharge water underground water easy to pollute；4. the heat exchange of straight well concentric tube is limited by casing programme size
System, the concentric tube caliber of tripping in is smaller, and circulating water flow and heat exchange amount are smaller.In general, current development scheme cannot reach
To or cannot be fully achieved the purpose of " only take heat do not fetch water ".
Summary of the invention
The purpose of the present invention is to provide one kind based on inclined shaft level docking geothermal well borehole track and design method, solves
The problem of existing geothermal resource of hydrothermal type development scheme " both having taken heat or water intaking ", it is truly realized the mesh of " heat is only taken not fetch water "
's.
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft provided by the invention, including following step
It is rapid:
The first step determines position and the seat of slope mouth and horizontal engineering well well head according to the size of construction area, shape
Mark calculates distance d1 between the two according to the coordinate of slope mouth and horizontal engineering well well head, determines further according to distance d1 oblique
The reserve migration distance d2 of well borehole track；
Second step determines the borehole track of inclined shaft, wherein the borehole track of inclined shaft include inclined shaft one open borehole track S1 and
Inclined shaft two opens borehole track S2:
A1 determines that inclined shaft one opens borehole track S1:
It is straight well borehole track that inclined shaft one, which opens borehole track S1 and opens terminal from slope mouth to inclined shaft one,；
A2 determines that inclined shaft two opens borehole track S2:
It includes first segment S201, second segment S202 and third section S203 that inclined shaft two, which opens borehole track S2, specifically:
It is straight well borehole track that first segment S201 opens terminal to inclined shaft two to open deflecting starting point from inclined shaft one；
Second segment S202 since inclined shaft two opens deflecting starting point increasing hole angle to generationOffset distance after drop angle to inclined shaft two open
Deflecting terminal, wherein the horizontal offset that inclined shaft two opens deflecting terminal meets d2 >=250-d1, and direction of displacement is two well well heads company
Line and backwards horizontal engineering well well head, the maximum hole angle of second segment S202 are 6~12 °；
It is straight well borehole track that third section S203 opens deflecting terminal to inclined shaft two to open terminal from inclined shaft two, meanwhile, which sets
It is equipped with the connection docking point being connected to horizontal engineering well；
Third step determines horizontal engineering well borehole track:
B1 determines that horizontal engineering well one opens borehole track S3:
It is straight well well that horizontal engineering well one, which opens borehole track S3 and opens terminal from horizontal engineering well well head to horizontal engineering well one,
Eye track；
B2 determines that horizontal engineering well two opens borehole track S4:
It includes first segment S401, second segment S402 and third section S403 that horizontal engineering well two, which opens borehole track S4, specifically:
It is straight well borehole track that first segment S401 opens terminal to horizontal engineering well two to open kickoff point (KOP) from horizontal engineering well one；
It is steady increasing hole angle formula borehole track that second segment S402, which opens kickoff point (KOP) to horizontal engineering well landing point from horizontal engineering well two,
Borehole track is inStandard is arc-shaped；
Third section S403 is horizontal hole track from horizontal engineering well landing point to docking point is connected to.
Preferably, in the a1 of second step, slope mouth is located at ground surface, and wellbore is after topsoil and unconsolidated formation to inclined shaft
One opens terminal, wherein inclined shaft one, which is opened terminal and is located at, stablizes in clay layer 10~20m of 10~20m or bedrock surface or less.
Preferably, in the first segment S201 of the a2 of second step, wellbore is passed through to stablize clay layer or basement rock and open to inclined shaft two and be made
Oblique starting point, inclined shaft two open the middle part that deflecting starting point is placed in sandstone layer, and at the one third Along ent for the total vertical depth that drives a well for two.
Preferably, in the second segment S202 of the a2 of second step, the wellbore of increasing hole angle formula borehole track opens deflecting by inclined shaft two
Point start with 4~6 °/30m of build angle rate since 0 ° of hole deviation ing increasing hole angle up to generationOffset distance after terminate, at this point, increasing hole angle formula
The terminal hole deviation of borehole track is θ °, and orientation is along two well well head lines and backwards to horizontal engineering well well head；
The wellbore of drop angle formula borehole track is by the terminal of increasing hole angle formula borehole track with 4~6 °/30m of build angle rate from hole deviation
θ ° of beginning drop angle is until generateOffset distance after terminate, at this point, the terminal hole deviation of drop angle formula borehole track be 0 °, orientation edge
Two well well head lines are backwards to horizontal engineering well well head.
Preferably, in the third section S203 of the a2 of second step, inclined shaft two is opened terminal and is located in heat reservori 20 below shale layer
~40m；Shale layer of the thickness greater than 6m docks layer with the connection of horizontal engineering well for inclined shaft in any selection heat reservori, simultaneously will
2~4m below the shale layer top circle is set as the connection docking point of inclined shaft Yu horizontal engineering well.
Preferably, in the b1 of third step, horizontal engineering well well head is located at ground surface, and wellbore drills topsoil and unconsolidated formation is straight
Terminal is opened to horizontal engineering well one, and horizontal engineering well one, which is opened terminal and is located at, stablizes in clay layer 10~20m or bedrock surface or less 10
~20m.
Preferably, in the first segment S401 of the b2 of third step, wellbore is opened terminal and passed through from horizontal engineering well one stablizes clay
Horizontal engineering well two into sandstone layer of layer or basement rock opens kickoff point (KOP), meanwhile, horizontal engineering well two is opened kickoff point (KOP) and is docked with being connected to
Vertical depth TVD between pointJ-TVDHKickoff point (KOP) is opened with horizontal engineering well two to deposit with the horizontal distance d1+d2 being connected between docking point
It is being associated with, in which:
If 250m≤d1+d2≤346m, 190m≤TVDJ-TVDH≤d1+d2-60；
If d1+d2 > 346m, then 190m≤TVDJ-TVDH≤286m。
Preferably, in the second segment S402 of the b2 of third step, wellbore from horizontal engineering well two open kickoff point (KOP) with build angle rate 6~
9 °/30m is by 0 ° of stable increasing hole angle, and orientation is along two well well head lines and towards slope mouth, until horizontal engineering well landing point is landed, this
When, hole deviation increases to 90 °；Wherein, horizontal engineering well landing point and horizontal engineering well two open the difference VS of the horizontal displacement of kickoff point (KOP)I-
VSHMeet the following conditions:
If 250m≤d1+d2≤346m, 190m≤VSI-VSH≤d1+d2-60；
If d1+d2 > 346m, then 190m≤VSI-VSH≤286m。
Preferably, in the third section S403 of the b2 of third step, the hole deviation of the borehole track of third section S403 is kept for 90 °, side
Position is along two well well head lines and towards slope mouth.
One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft, the U-shaped structure of geothermal well borehole track.
Compared with prior art, the beneficial effects of the present invention are:
A kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft provided by the invention, by inclined shaft
Two open S202 sections of implementation reserve migrations, produce reserve migration distance d2, make d1+d2 >=250m, effectively increase underground connection
Dock distance, it is ensured that the connection operation of two wells is gone on smoothly, and uses horizontal docking style geothermal well technology for city narrow and small place
Exploitation mid-deep strata geothermal resource of hydrothermal type creates condition；S202 sections of build angle rate and reserve migration well are opened by adjusting inclined shaft two
Segment length can further increase reserve migration away from d2, make d1+d2 far more than 250m, to further increase underground connection docking
Distance.
Further, inclined shaft one is opened into terminal, horizontal engineering well one open terminal be placed in stable clay layer or bedrock surface hereinafter,
Effective supporting course can be provided for the casing in Cheng Jinghou wellbore, so that the bad grounds such as top unconsolidated formation, drift sand formation are effectively insulated,
Two are improved to drive a well an operational security.
Further, inclined shaft two is opened into deflecting starting point, horizontal engineering well two is opened kickoff point (KOP) and is placed in stable sandstone layer, can be
Drilling well deflecting tool improves effective fulcrum, is conducive to quickly improve hole deviation, increases deflecting effect.
Further, layer is docked using thickness >=6m shale layer in heat reservori as connection, and connection docking point is placed in
2~4m below the shale layer can further increase pit shaft and aqueous heat reservori using shale layer sheet as the characteristic of water barrier
Effect is insulated, " heat is taken not fetch water " effect is improved.
Further, using in such a way that inclined shaft implements reserve migration, horizontal engineering well borehole track is smooth, construction letter
It is single, be conducive to engineering well hole quality of improving the standard.
Detailed description of the invention
Fig. 1 is Hole clean schematic diagram.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in more detail.
Really to realize " heat is only taken not fetch water " exploitation 1500~3000m mid-deep strata geothermal resource of hydrothermal type, using one kind
Novel horizontal docking style geothermal well technology, by straight well pit shaft and horizontal engineering well shaft by being docked and connected to form U-typed pipe, benefit
Heat is taken with hot and cold water circulation.This Novel horizontal docking style geothermal well has the well head distance of straight well and horizontal engineering well certain
It is required that (usually less than 250m), to ensure to have enough distances that is docked and connected between two wells.But the skill is used in urban area
When art, due to the limitation of construction site size, this specific well head required distance is generally unattainable.To solve this problem,
The present invention provide it is a kind of by straight well wellbore to two well well head line opposite direction deflections, increase underground and be docked and connected the wellbore rail of distance
Road determines method.It is no longer vertical well truly after straight well well deflection, referred to as inclined shaft (similarly hereinafter).
As shown in Figure 1, a kind of borehole track based on the horizontal docking style geothermal well of inclined shaft provided by the invention, including inclined shaft
With horizontal engineering well, the borehole track of inclined shaft and horizontal engineering well is connected in bottom, whole U-shaped structure.
Inclined shaft includes that inclined shaft one drives a well eye and inclined shaft two drives a well eye, wherein inclined shaft one drives a well the perpendicular shape structure of eye；Inclined shaft
Two eyes that drive a well include the first vertical section inclined shaft, tilting section inclined shaft and the second vertical section inclined shaft, and are driven a well the bottom of eye from inclined shaft one
The first vertical section inclined shaft, tilting section inclined shaft and the second vertical section inclined shaft are followed successively by the drive a well bottom of eye of inclined shaft two；Tilting section is oblique
Well includes increasing hole angle section inclined shaft and drop angle section inclined shaft, and from the bottom of the first vertical section inclined shaft to the well head of the second vertical section inclined shaft according to
Secondary is increasing hole angle section inclined shaft and drop angle section inclined shaft.
Horizontal engineering well includes that horizontal engineering well one drives a well eye and horizontal engineering well two drives a well eye, wherein horizontal engineering well
One drives a well the perpendicular shape structure of eye；Horizontal engineering well two eye that drives a well includes vertical section engineering well, tilting section engineering well and horizontal segment
Engineering well, and vertical section engineering is followed successively by from drive a well the drive a well bottom of eye of bottom to horizontal engineering well two of eye of horizontal engineering well one
Well, tilting section engineering well and horizontal segment engineering well；Tilting section engineering well is arc-shaped steady increasing hole angle well construction.
The present invention also provides a kind of borehole track based on the horizontal docking style geothermal well of inclined shaft design method, including with
Lower step:
The first step is bored the stratum met to wellbore and is layered according to construction area geological conditions, determines topsoil, loose
Layer stablizes clay layer, bedrock surface, sandstone layer, the depth of shale layer and heat reservori, especially determines thickness >=6m mud in heat reservori
Formation depth；
Second step measures the coordinate of slope mouth A and horizontal engineering well well head B, calculates two Jing Jing according to the coordinate of the two
The distance between mouth d1, while the reserve migration distance d2 that slanted well bores track needs is determined according to distance d1, wherein d2 >=
250-d1；
Third step determines that inclined shaft one opens borehole track S1: inclined shaft one drive a well eye track S1 by slope mouth A to inclined shaft one
Terminal C is opened, and track S1 uses vertical boreholes track, wherein slope mouth A is located at ground surface, and wellbore passes through topsoil and pine
It dissipates and opens terminal C to inclined shaft one after layer, wherein inclined shaft one, which is opened terminal C and is located at, stablizes in clay layer 10~20m or bedrock surface or less 10
~20m；
4th step determines that inclined shaft two opens borehole track S2, opens terminal C by inclined shaft one and is drilled into inclined shaft two and opens terminal F, meanwhile,
It includes first segment S201, second segment S202 and third section S203 that inclined shaft two, which opens borehole track S2:
Specifically, first segment S201 uses vertical boreholes track, and opens terminal C by inclined shaft one and open deflecting starting point to inclined shaft two
D, wherein wellbore opens deflecting starting point D to inclined shaft two after stablizing clay layer or basement rock, and inclined shaft two opens deflecting starting point D and is placed in sand
The middle part of rock stratum, and be located at two drive a well a total vertical depth one third Along ent at；
Second segment S202 uses " increasing hole angle-drop angle " formula borehole track, and by inclined shaft two opens deflecting starting point D and open to inclined shaft two and make
Oblique terminal E, wherein the wellbore of increasing hole angle formula borehole track deflecting starting point D is opened by inclined shaft two with 4~6 °/30m of build angle rate from well
Oblique 0 ° of beginning increasing hole angle is until generateOffset distance after terminate, at this point, the terminal hole deviation of increasing hole angle formula borehole track be θ °, offset
Orientation is for two well well head lines and backwards to horizontal engineering well well head B；
The wellbore of drop angle formula borehole track is by the terminal of increasing hole angle formula borehole track with 4~6 °/30m of build angle rate from hole deviation
θ ° of beginning drop angle is until generateOffset distance after terminate, at this point, the terminal hole deviation of drop angle formula borehole track be 0 °, offset side
Position is for two well well head lines and backwards to horizontal engineering well well head B；
The maximum hole angle of second segment S202 full section wellbore is 6~12 °；Cooperate compass design of drilling track software, into
One successive step and optimization build angle rate and maximum hole angle, under the conditions of meeting E point offset distance d2 >=250-d1, E point is placed in sandstone layer
In；
Third section S203 uses vertical boreholes track, and opens deflecting terminal E by inclined shaft two and open terminal F to inclined shaft two, wherein
Wellbore passes through sandstone layer 20~40m below shale layer into heat reservori；
Meanwhile shale layer of the thickness greater than 6m is that inclined shaft is docked with the connection of horizontal engineering well in any selection heat reservori
Layer；Simultaneously set 2~4m below the shale layer top circle to the connection docking point J of inclined shaft Yu horizontal engineering well；
5th step determines that horizontal engineering well one opens borehole track S3:
Horizontal engineering well one opens borehole track S3 using vertical boreholes track, and horizontal engineering well one open borehole track S3 by
Horizontal engineering well well head B opens terminal G to horizontal engineering well one, wherein horizontal engineering well well head B is located at ground surface, and wellbore drills
Topsoil and unconsolidated formation until horizontal engineering well one opens terminal G, horizontal engineering well one open terminal G be located at stablize 10 in clay layer~
10~20m below 20m or bedrock surface；
6th step determines that horizontal engineering well two opens borehole track S4:
Horizontal engineering well two opens borehole track S4 and opens terminal G to connection docking point J, including first segment by horizontal engineering well one
S401, second segment S402, third section S403, specifically:
First segment S401 uses vertical boreholes track, opens terminal G by horizontal engineering well one and opens deflecting to horizontal engineering well two
Point H, wherein wellbore, which passes through, to be stablized the horizontal engineering well two of clay layer or basement rock into sandstone layer and opens kickoff point (KOP) H, meanwhile, it is horizontal
Engineering well two opens kickoff point (KOP) H and the vertical depth TVD that is connected between docking point JJ-TVDHKickoff point (KOP) H and company are opened with horizontal engineering well two
There is association in the horizontal distance d1+d2 between logical docking point J, in which:
If 250m≤d1+d2≤346m, 190m≤TVDJ-TVDH≤d1+d2-60；
If d1+d2 > 346m, then 190m≤TVDJ-TVDH≤286m；
Second segment S402 uses steady increasing hole angle borehole track, and borehole track is inStandard is arc-shaped, is opened and is made by horizontal engineering well two
Oblique point H to horizontal engineering well landing point I, wherein wellbore from horizontal engineering well two open kickoff point (KOP) H with 6~9 °/30m of build angle rate by
0 ° of stable increasing hole angle, orientation is along two well well head lines and towards slope mouth A, until horizontal engineering well landing point I lands, at this point, well
Tiltedly increase to 90 °；The position of landing point I is determined according to the design parameter and the fixed point position H of borehole track, due to standard round
The symmetric relation of arc borehole track, the difference VS of the horizontal displacement of landing point I and kickoff point (KOP) HI-VSHWith TVDJ-TVDHThere are equivalent
Relationship, therefore, the position of landing point I meets condition are as follows:
If 250m≤d1+d2≤346m, 190m≤VSI-VSH≤d1+d2-60；
If d1+d2 > 346m, then 190m≤VSI-VSH≤286m；
Third section S403 uses horizontal hole track, by horizontal engineering well landing point I to connection docking point J, wherein the well
The hole deviation of eye track is kept for 90 °, and orientation is along two well well head lines and towards slope mouth A.
Claims (8)
1. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft, which comprises the following steps:
The first step, according to the size of construction area, shape determine slope mouth (A) and horizontal engineering well well head (B) position and
Coordinate calculates distance d1 between the two according to the coordinate of slope mouth (A) and horizontal engineering well well head (B), further according to distance
D1 determines the reserve migration distance d2 of slanted well bores track；
Second step determines the borehole track of inclined shaft, wherein the borehole track of inclined shaft includes that inclined shaft one opens borehole track S1 and inclined shaft
Two open borehole track S2:
A1 determines that inclined shaft one opens borehole track S1:
It is straight well borehole track that inclined shaft one, which opens borehole track S1 and opens terminal (C) from slope mouth (A) to inclined shaft one,；
A2 determines that inclined shaft two opens borehole track S2:
It includes first segment S201, second segment S202 and third section S203 that inclined shaft two, which opens borehole track S2, specifically:
It is straight well borehole track that first segment S201 opens terminal (C) to inclined shaft two to open deflecting starting point (D) from inclined shaft one；
Second segment S202 increasing hole angle since inclined shaft two opens deflecting starting point (D) extremely generatesOffset distance after drop angle to inclined shaft two open
Deflecting terminal (E), wherein the horizontal offset that inclined shaft two opens deflecting terminal (E) meets d2 >=250-d1, and direction of displacement is two wells
Well head line and backwards horizontal engineering well well head (B), the maximum hole angle of second segment S202 are 6~12 °；
It is straight well borehole track that third section S203 opens deflecting terminal (E) to inclined shaft two to open terminal (F) from inclined shaft two, meanwhile, the section
It is provided with the connection docking point (J) being connected to horizontal engineering well；
Third step determines horizontal engineering well borehole track, wherein horizontal engineering well borehole track includes that horizontal engineering well one drives a well
Eye track S3 and horizontal engineering well two open borehole track S4:
B1 determines that horizontal engineering well one opens borehole track S3:
It is straight well that horizontal engineering well one, which opens borehole track S3 and opens terminal (G) from horizontal engineering well well head (B) to horizontal engineering well one,
Borehole track；
B2 determines that horizontal engineering well two opens borehole track S4:
It includes first segment S401, second segment S402 and third section S403 that horizontal engineering well two, which opens borehole track S4, specifically:
It is straight well borehole track that first segment S401 opens terminal (G) to open kickoff point (KOP) (H) to horizontal engineering well two from horizontal engineering well one；
It is steady increasing hole angle formula wellbore rail that second segment S402, which opens kickoff point (KOP) (H) extremely horizontal engineering well landing point (I) from horizontal engineering well two,
Road, borehole track are inStandard is arc-shaped；
Third section S403 is horizontal hole track from horizontal engineering well landing point (I) to docking point (J) is connected to；
In the a1 of second step, slope mouth (A) is located at ground surface, and wellbore opens terminal to inclined shaft one after topsoil and unconsolidated formation
(C), wherein inclined shaft one, which is opened terminal (C) and is located at, stablizes in clay layer 10~20m of 10~20m or bedrock surface or less；
In the first segment S201 of the a2 of second step, wellbore, which passes through, to be stablized clay layer or basement rock to inclined shaft two and opens deflecting starting point (D), tiltedly
Well two opens the middle part that deflecting starting point (D) is placed in sandstone layer, and at the one third Along ent for the total vertical depth that drives a well for two.
2. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft according to claim 1, special
Sign is: in the second segment S202 of the a2 of second step, the wellbore of increasing hole angle formula borehole track opens deflecting starting point (D) by inclined shaft two
With 4~6 °/30m of build angle rate since 0 ° of hole deviation increasing hole angle up to generateOffset distance after terminate, at this point, increasing hole angle formula wellbore rail
The terminal hole deviation in road is θ °, and orientation is along two well well head lines and backwards to horizontal engineering well well head (B)；
The wellbore of drop angle formula borehole track is opened with 4~6 °/30m of build angle rate from θ ° of hole deviation by the terminal of increasing hole angle formula borehole track
Beginning drop angle is until generateOffset distance after terminate, at this point, the terminal hole deviation of drop angle formula borehole track be 0 °, orientation is along two wells
Well head line is backwards to horizontal engineering well well head (B).
3. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft according to claim 1, special
Sign is: in the third section S203 of the a2 of second step, inclined shaft two opens terminal (F) and is located in heat reservori 20~40m below shale layer；
It is any to choose shale layer of the thickness greater than 6m in heat reservori and be that inclined shaft docks layer with the connection of horizontal engineering well, while by the mud stone
2~4m of Ceng Ding circle or less is set as the connection docking point (J) of inclined shaft Yu horizontal engineering well.
4. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft according to claim 1, special
Sign is: in the b1 of third step, horizontal engineering well well head (B) is located at ground surface, and wellbore drills topsoil and unconsolidated formation until water
Flat engineering well one is opened terminal (G), and horizontal engineering well one, which is opened terminal (G) and is located at, stablizes in clay layer 10~20m or bedrock surface or less
10~20m.
5. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft according to claim 1, special
Sign is: in the first segment S401 of the b2 of third step, wellbore is opened terminal (G) and passed through from horizontal engineering well one stablizes clay layer or base
Horizontal engineering well two of the rock into sandstone layer is opened kickoff point (KOP) (H), meanwhile, horizontal engineering well two open kickoff point (KOP) (H) be connected to docking
Vertical depth TVD between point (J)J-TVDHWith horizontal engineering well two open kickoff point (KOP) (H) be connected between docking point (J) it is horizontal away from
Exist from d1+d2 and be associated with, in which:
If 250m≤d1+d2≤346m, 190m≤TVDJ-TVDH≤d1+d2-60；
If d1+d2 > 346m, then 190m≤TVDJ-TVDH≤286m。
6. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft according to claim 1, special
Sign is: in the second segment S402 of the b2 of third step, wellbore from horizontal engineering well two open kickoff point (KOP) (H) with 6~9 ° of build angle rate/
30m is by 0 ° of stable increasing hole angle, and orientation is along two well well head lines and towards slope mouth (A), until horizontal engineering well landing point (I)
Land, at this point, hole deviation increases to 90 °；Wherein, horizontal engineering well landing point (I) and horizontal engineering well two open the horizontal position of kickoff point (KOP) (H)
The difference VS movedI-VSHMeet the following conditions:
If 250m≤d1+d2≤346m, 190m≤VSI-VSH≤d1+d2-60；
If d1+d2 > 346m, then 190m≤VSI-VSH≤286m。
7. a kind of design method based on the horizontal docking style geothermal well borehole track of inclined shaft according to claim 1, special
Sign is: in the third section S403 of the b2 of third step, the hole deviation of the borehole track of third section S403 is kept for 90 °, and orientation is along two wells
Well head line and towards slope mouth (A).
8. it is based on the horizontal docking style geothermal well borehole track of inclined shaft as any one of claim 1-7 designs resulting one kind, it is special
Sign is: the U-shaped structure of geothermal well borehole track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725013.9A CN107366531B (en) | 2017-08-22 | 2017-08-22 | One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725013.9A CN107366531B (en) | 2017-08-22 | 2017-08-22 | One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107366531A CN107366531A (en) | 2017-11-21 |
| CN107366531B true CN107366531B (en) | 2019-08-27 |
Family
ID=60311302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710725013.9A Expired - Fee Related CN107366531B (en) | 2017-08-22 | 2017-08-22 | One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107366531B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302535B (en) * | 2019-07-26 | 2022-12-23 | 新奥科技发展有限公司 | Well drilling device and warehouse building method of geothermal system |
| CN111022062B (en) * | 2019-12-06 | 2022-09-16 | 首钢滦南马城矿业有限责任公司 | Construction method for clay layer section of ramp |
| CN111236904B (en) * | 2020-01-19 | 2021-03-23 | 中国地质科学院勘探技术研究所 | Geothermal exploitation method for double horizontal wells in butt joint communication to extract heat by water separation |
| CN112984848A (en) * | 2021-03-05 | 2021-06-18 | 李强 | Combined heat supply and shallow geothermal energy concurrent heating system for middle-deep layer and shallow geothermal energy |
| CN114961668B (en) * | 2022-05-18 | 2023-12-29 | 太原理工大学 | Fracture type dry hot rock reservoir double inclined shaft sectional regulation and control reinforced heat collection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246273A (en) * | 1991-05-13 | 1993-09-21 | Rosar Edward C | Method and apparatus for solution mining |
| CN1515783A (en) * | 2003-08-29 | 2004-07-28 | 化工部长沙设计研究院 | Method for exploiting natural alkali mineral by utilizing horizontal butt well |
| CN101395338A (en) * | 2005-01-14 | 2009-03-25 | 哈利伯顿能源服务公司 | System and method for producing fluids from a subterranean formation |
| CN101629485A (en) * | 2009-06-17 | 2010-01-20 | 中国地质科学院勘探技术研究所 | Exploitation method of communication well of geothermal energy bore well |
| CN102116140A (en) * | 2011-01-25 | 2011-07-06 | 煤炭科学研究总院西安研究院 | Construction method for enhancing extraction effect of ground coal bed gas |
| CN103993829A (en) * | 2014-05-13 | 2014-08-20 | 中国石油化工股份有限公司 | Medium-long-radius track for two-dimensional small before-target distance horizontal well |
-
2017
- 2017-08-22 CN CN201710725013.9A patent/CN107366531B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246273A (en) * | 1991-05-13 | 1993-09-21 | Rosar Edward C | Method and apparatus for solution mining |
| CN1515783A (en) * | 2003-08-29 | 2004-07-28 | 化工部长沙设计研究院 | Method for exploiting natural alkali mineral by utilizing horizontal butt well |
| CN101395338A (en) * | 2005-01-14 | 2009-03-25 | 哈利伯顿能源服务公司 | System and method for producing fluids from a subterranean formation |
| CN101629485A (en) * | 2009-06-17 | 2010-01-20 | 中国地质科学院勘探技术研究所 | Exploitation method of communication well of geothermal energy bore well |
| CN102116140A (en) * | 2011-01-25 | 2011-07-06 | 煤炭科学研究总院西安研究院 | Construction method for enhancing extraction effect of ground coal bed gas |
| CN103993829A (en) * | 2014-05-13 | 2014-08-20 | 中国石油化工股份有限公司 | Medium-long-radius track for two-dimensional small before-target distance horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107366531A (en) | 2017-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107366531B (en) | One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method | |
| CN104481398B (en) | A kind of three-dimensional horizontal well drilling construction method | |
| CN105298463B (en) | Gas hydrates big well multiple-limb radially horizontal well completion method | |
| CN102392677A (en) | Permeability improvement technology for coal bed gas reservoir cap by using three-dimensional fracture network modification | |
| CN106703880B (en) | The unrestrained through type water conservancy diversion spilled water hole of mining high-order absciss layer water and its construction method | |
| CN104633996B (en) | Water source heat pump recharging technical method | |
| CN102146788A (en) | Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir | |
| CN112593910B (en) | Efficient mining method for broken low-permeability coal bed gas short horizontal well group | |
| CN107100605A (en) | A kind of method that dual horizontal well circulation supercritical carbon dioxide develops hot dry rock | |
| CN110397428A (en) | A kind of gas displacing coal-bed method for increasing of straight well and U-shaped butt shaft unitized production coal bed gas | |
| CN104832119A (en) | Window opening and sidetrack drilling short-radius horizontal well and reverse circulation well cementing and water plugging method | |
| CN109630088A (en) | Method for determining arrangement position of high-position drilling hole | |
| CN110043229A (en) | A kind of more well group connection convergence recovery methods of Gas Hydrate In Sea Areas | |
| CN106978993A (en) | A kind of medium and deep sandstone underground heat horizontal well recovery method and structure | |
| CN110306965A (en) | A kind of method for increasing for coal bed gas low yield wellblock | |
| CN103541657A (en) | Drilling tool and construction method for oil gas well hard formation sidetracking | |
| CN103422813B (en) | Individual well eye multi-lateral horizontal well system for coal bed gas and boring method | |
| CN107060642A (en) | Horizontal well track control method being connected trona deep-thin layer more | |
| CN107605455A (en) | One kind is based on the horizontal docking style geothermal well borehole track of straight well negative displacement and design method | |
| CN103993829B (en) | Apart from the middle major radius track of horizontal well before the little target of a kind of two dimension | |
| CN103993830B (en) | A kind of method determining the front middle major radius track apart from horizontal well of two-dimentional little target | |
| CN105625944B (en) | Drilling method for sidetracking horizontal well with same diameter as original well shaft | |
| CN116122774B (en) | Outburst prevention method for combined operation layer gas extraction area of ultra-close coal seam well up-down combination operation | |
| Yang et al. | Application of well factory drilling technology in shale gas development in the Sichuan basin | |
| CN205936553U (en) | Raising output is transformed and novel coal seam gas well of formation to old well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |