CN109184693A - The old mining area old well production potential tapping technique of rock salt - Google Patents
The old mining area old well production potential tapping technique of rock salt Download PDFInfo
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- CN109184693A CN109184693A CN201811035902.3A CN201811035902A CN109184693A CN 109184693 A CN109184693 A CN 109184693A CN 201811035902 A CN201811035902 A CN 201811035902A CN 109184693 A CN109184693 A CN 109184693A
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- 235000002639 sodium chloride Nutrition 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000005065 mining Methods 0.000 title claims abstract description 40
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 29
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 80
- 150000003839 salts Chemical class 0.000 claims abstract description 27
- 238000003032 molecular docking Methods 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000009974 thixotropic effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 241001131796 Botaurus stellaris Species 0.000 abstract description 7
- 229910052736 halogen Inorganic materials 0.000 abstract description 6
- 150000002367 halogens Chemical class 0.000 abstract description 6
- 241001074085 Scophthalmus aquosus Species 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010442 halite Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/20—Methods of underground mining; Layouts therefor for rock salt or potash salt
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- 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)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of old mining area old well production potential tapping techniques of rock salt, newly-built multiple-limb horizontally-butted wells are connected to the molten chamber of multiple old well groups of the current underproduction or halt production or horizontal segment and adopt halogen, well track is monitored and controlled using inclinometer when carrying out multi-branched horizontal well straight well section drilling, inclinometer is used in increasing hole angle section drilling process, single bend PDM drilling tool controls direction of deflection, after getting around old molten chamber or top plate blowby area toward salt deposit downdip direction, orientation is adjusted again, to docking target well drilling, not only improve safety drilling, be conducive to increase control salt area again, increase and produces halogen amount and bittern concentration.
Description
Technical field
The present invention relates to rock salt drilling technology fields, and in particular to arrives a kind of old mining area old well production potential tapping technique of salt deposit.
Background technique
The old mining area exploitation current situation and existing problems of rock salt mainly have: (1) well spacing is unreasonable, and the area Jing Jiancaisheng is big；(2) salt deposit
Top plate is connected to molten chamber large area causes bittern concentration low, and salt chemical engineering high production cost；(3) rate of extraction is low, is generally lower than
30%；(4) short using mining methods, the individual well lengths of service such as straight well Single well convection, horizontally-butted wells；(5) cementing quality does not conform to
Lattice, cased perforated lead to environmental pollution.
In view of the above-mentioned problems, conventional old mining area Tapping Potential Method has: (1) drifting, remove in casing and the crystallization of shaft bottom salt and
The substances such as sand setting；(2) casing window sidetracking opens up new exploitation channel；(3) physical method, center pipe hanger hose change brine stream
Dynamic state, enhances rock salt dissolving ability, improves brine and produces concentration.Position of the up and down central tube transform center pipe in salt deposit
It sets to increase the water-soluble amount of rock salt.(4) lubricating pad Horizontal Bridgman Method prevents on molten chamber to a certain amount of petroleum of molten intracavitary injection or diesel oil
It is molten.After above-mentioned Oil reserve digging, though initial stage of production yield and concentration have a degree of promotion, stable production period is short, and exists
Following problems: (1) it drifting after is easy to block up again；(2) after window sidetracking, the later period repairs and renovate difficulty again；(3) physical method is first also in development
It is phase, still immature；(4) lubricating pad horizontal wells high production cost, environmental protection pressure are big.Now most common is branch horizontal well,
I.e. newly-built branch horizontal well docks target well connection exploitation with multiple, compared to preceding several Tapping Potential Methods, branch horizontal well effect
It becomes apparent from, but due to the complex situations that old mining area salt deposit top plate is connected to molten chamber large area, water burst seriously will lead to branch levels
Well is difficult to normally creep into；The branch horizontal well of horizontal segment length, backing pressure is serious, and it is difficult to also result in drilling.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of old mining area old well production potential tapping techniques of rock salt, can overcome routine
Branch horizontal well docking technique old mining area tap the latent power aspect existing for technological deficiency.
The technical scheme adopted by the invention is that: the old mining area old well production potential tapping technique of rock salt, comprising the following steps:
S1: according to the existing well site reasonable Arrangement well location in the old mining area of rock salt, and the multiple-limb being connected to existing well location is designed
The casing programme of horizontal well and track of taping the latent power；
S2: the drilling of multi-branched horizontal well straight well section is carried out according to the casing programme designed in S1 and track of taping the latent power and is consolidated
Well；
S3: the drilling of multi-branched horizontal well increasing hole angle section is carried out according to the casing programme designed in S1 and track of taping the latent power and is consolidated
Well；
S4: the drilling of multi-branched horizontal well horizontal segment and each is carried out according to the casing programme designed in S1 and track of taping the latent power
Multilateral Wells are docked and connected with existing well location；
Wherein, well track is monitored and controlled using inclinometer when straight well section is crept into S2, accurately controls well track, prevents
Only since the existing well site offset well in old mining area is more and apart from close and collide with offset well.
Direction of deflection is controlled using inclinometer, single bend PDM drilling tool in increasing hole angle section drilling process in S3, by toward under salt deposit
Incline after direction gets around old molten chamber or top plate blowby area, then adjust orientation, to docking target well drilling, not only improves safe brill
Into, and be conducive to increase control salt area, bittern concentration is improved, to improve the rate of extraction.
Further, the positional relationship for considering when designing in S1 and intending docking target well avoids the old wellbore of offset well, old molten chamber
With top plate blowby area, guarantees accurately get around old wellbore, old molten chamber and top plate blowby area when subsequent drilling, be drilled into rock salt purpose
Layer.
Further, in S4, before the drilling of horizontal segment, in the well head installation preventer rotation control of multi-branched horizontal well
Head carries out drilling with pressure, prevents stratum water burst in drilling process, and offset well and docking target well stop production without pressure release.
Further, in S4, the horizontal segment of Chang Du≤300m increases hydroscillator on conventional directional tool and is bored
Into the problem longer mainly for horizontal segment, frictional resistance is larger, realization is safely and fast crept into.
Further, in S4, drilling rod makes a call to half root and lifts once and be added in additive for drilling fluid anti-collapse when horizontal segment is crept into
Lubricant prevents backing pressure, guarantees smoothly drilling extremely docking target well target spot.
Further, in S3, near salt deposit top plate gush drop ply well cementation when, first the positive injection thixotroping out of protective casing pipe
Property cement, thixotropic cement returns to gush drop ply after, then from the anti-squeeze method of annular space to gushing drop ply, it is ensured that between protective casing and the borehole wall
Annular space filled up by cement, avoid influencing the individual well length of service and to cause environmental pollution because cementing quality is unqualified.
Further, in S4, precise positioning instrument is used in multi-branched horizontal well and existing well location handshaking procedures, is guaranteed more
The horizontal segment of branch horizontal well is passed through in rock salt target zone, realizes that the old molten chamber of existing well location or horizontal segment quick and precisely connect
It is logical, therefore reduce Engineering Task amount and shorten the construction period, reduce drilling cost.
Beneficial effects of the present invention:
(1) it economizes the land resource: utilizing the existing well site in old mining area, reduce the land resource that newly-built well site need to occupy,
And corresponding Engineering Task amount and capital cost, shorten the construction period.
(2) when straight well section is crept into, well track is monitored and controlled using inclinometer, prevents it from colliding with offset well.
(3) direction of deflection is controlled using inclinometer, single bend PDM drilling tool in increasing hole angle section drilling process, by having a down dip toward salt deposit
After direction gets around old molten chamber or top plate blowby area, then orientation is adjusted, to docking target well drilling, not only improves safety drilling,
Be conducive to increase control salt area again.
(4) before the drilling of horizontal segment, preventer swivel control head is installed in well head, carries out drilling with pressure, solves new brill
Well easily occurs gushing the complex situations such as leakage near old mining area salt deposit top plate, to guarantee normal drilling to docking target well target spot.
(5) drop ply nearby is gushed for salt deposit top plate, in intermediate casing cementing, using thixotropic cement, takes positive injection anti-
Crowded well cementation mode avoids influencing the individual well length of service and to lead to environmental pollution because cementing quality is unqualified.
(6) for certain horizontal segment lengths Horizontal Well Drilling into when, close increase hydroscillator in conventional directional tool group,
Realization is safely and fast crept into,
(7) it takes drilling rod to make a call to half root in drilling and lifts primary, the modes such as addition anti sinking lubricant in additive for drilling fluid
Backing pressure is prevented, realizes fast drilling.
(8) using the old well group of the ready-made existing underproduction or halt production as docking target well Engineering Task amount and contracting
The short construction period, reduce drilling cost.
(9) due to using anti-collision in drilling process, around barrier technique, the well type for docking target well can be straight well, directional well
It as long as horizontal well has channel or molten chamber, may be implemented to be docked and connected, be suitable for all well groups in old mining area, have
Very strong universality and generalization.
Detailed description of the invention
Fig. 1 is that the old mining area of rock salt of the invention is taped the latent power new process casing programme schematic diagram.
Fig. 2 is that the old mining area of rock salt of the invention is taped the latent power each well flat distribution map of new process.
In the figure, it is marked as mono- game clock interval of 1-, 2- straight well section, 3- increasing hole angle section, the horizontal segment of the first branch of 4-, 5- first divide
Branch docks the molten chamber of target well, and target well, the horizontal segment of the second branch of 7- are docked in the first branch of 6-, and target is docked in the second branch of 8-
The molten chamber of well, the second branch of 9- docking target well, 10- rock salt target zone, 11- multi-branched horizontal well, 12- multi-branched horizontal well
Main shaft section.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The old mining area old well production potential tapping technique of rock salt of the invention is taped the latent power for Conventional branch horizontal well pair connection technology in old mining area
Technological deficiency existing for aspect, the old mining area of rock salt that salt deposit top plate is connected to molten chamber large area, using the existing well site in old mining area,
Using the well group of the underproduction or halt production at present as docking target well, using anti-collision, around barrier and it is with pressure drilling etc. technologies to rock
It taps the latent power in the old mining area of salt.The technique not only can increase the contact area of wellbore and ore bed, improve the mine rate of extraction, moreover it is possible to save
Land resource reduces Engineering Task amount, shortens the construction period, reduces drilling cost.The technique is suitable for rock salt, sylvite and natural
The exploitation in the old mining area of the mineral products such as alkali is also applied for the exploitation of the old mining area mineral resources such as other soluble solids mineral products.
Embodiment 1:
For docking two target wells, as shown in Figure 1 and Figure 2, the old mining area old well production potential tapping technique of rock salt of the invention, packet
Include following steps:
S1: according to the existing well site reasonable Arrangement well location in the old mining area of rock salt, and the multiple-limb being connected to existing well location is designed
The casing programme of horizontal well 11 and track of taping the latent power.Due to being the existing well site in old mining area, have offset well around well location it is more and away from
Close, drilling trajectory is criss-cross, and drilling requires high, before arrange well location, should sufficiently grasp offset well data, need to consider and
The positional relationship for docking target well avoids the old wellbore of offset well, old molten chamber and top plate blowby area, selects optimal well location and track.
S2: according to the well location for the multi-branched horizontal well 11 arranged in S1, big mouth first is used in a game clock interval 1 of the well location
Then diameter drill bit aperture is vertically crept into design one using conventional drill assembly and ends drilling well depth, trip-out tripping in surface pipe is simultaneously
Then well cementation replaces time level-one drill bit, cooperates tunica routine drill assembly according to the well of the multi-branched horizontal well 11 designed in S1
Body structure and track of taping the latent power carry out the drilling of straight well section 2, continue vertical drilling to design kickoff point (KOP).Due to being old mining area existing well
, offset well is more and apart from close, at least it is distributed with 2~3 mouthfuls of wells in same well site, general 5 meters of well spacing or so, and straight well section 2
It should be carried out according to offset well data and planned course in drilling process and be worked with offset well anti-collision, needed when straight well section 2 is crept into using survey
Well track is monitored and controlled in oblique instrument, and inclinometer can be mono-/multi- point inclinometer or directional tool (MWD), prevent from creeping into
It collides in journey with offset well, and 30 meters of deviational surveys of every drilling are primary, prevents from boring oblique.
S3: after the drilling for completing straight well section 2, the replacement drilling tool that pulls out of hole is the brill that conventional directional tool combination carries out increasing hole angle section 3
Into creeping by the track of taping the latent power designed in S1 to halite layer, the continuous design two that is drilled into ends drilling well depth, tripping in protective casing to rock
In salt deposit and cement the well.Because of the universal early stage unordered exploitation in old mining area, well spacing is not scientific, and casing programme is unreasonable, and the later period uses water again
It forces and the modes such as splits and be connected to, after exploiting for a long time, therefore salt deposit top plate blowby, each old molten chamber is connected to or natural
It is molten logical.According to it is more than salt deposit it is molten be main the characteristics of, open in 3 drilling process of increasing hole angle section two and controlled using inclinometer and single bend PDM
Direction of deflection, inclinometer can be steering tool or wireless drilling inclinometers.In drilling process, encounter old molten chamber or
When person top plate blowby area, after getting around old molten chamber or top plate blowby area toward salt deposit downdip direction, then orientation is adjusted, to docking
Target well drilling, not only improves safety drilling, and is conducive to increase control salt area.Directional data according to directional tool measurement
In conjunction with the track of taping the latent power of design, direction of deflection is controlled using the single bend PDM of different cambers, is carried out targetedly around barrier and orientation
Drilling, it is ensured that practical drilling trace gets around the molten chamber of old well and salt deposit top plate blowby area, in order to avoid occur gushing the complex situations such as leakage to
Increase Engineering Task amount and drilling cost.Above-mentioned around barrier technique due to using, the target well well type of docking can be straight well, orientation
Well or horizontal well, therefore aspect is taped the latent power with very strong universality and generalization in old mining area.
Drop ply is gushed near salt deposit top plate, in intermediate casing cementing, using thixotropic cement, takes positive injection is counter to squeeze
Well cementation mode: first positive out of protective casing pipe cementing returns to after gushing drop ply, then from the anti-squeeze method of annular space to drop ply, it is ensured that
Annular space between protective casing and the borehole wall is filled up by cement.
S4: after the drilling for completing increasing hole angle section 3, the drill bit of smaller level-one is replaced, the small size of mating band hydroscillator is fixed
The drilling of multi-branched horizontal well horizontal segment is carried out to drill assembly, horizontal segment is mainly the horizontal segment 4 and for carrying out the first branch
The horizontal segment 7 of two branches and the drilling of other Multilateral Wells horizontal segments 4 first creep into the brill of the main shaft section 12 of multi-branched horizontal well
Into then creeping into the horizontal segment 4 of the first branch of multi-branched horizontal well 11, so that the first branch with the first branch is docked target well 6 right
After leading in succession, former drilling tool is retracted into the horizontal segment 7 of the outer appropriate location of pipe shoe of protective casing the second branch of sidetracking again, makes second
Branch docks target well 9 with the second branch and is docked and connected, and so repeats, until multi-branched horizontal well 11 and other target wells are right
Lead in succession.In order to ensure trajectory of horizontal is always in rock salt target zone 10, crept into using precise positioning instrument (RMRS) horizontal
Section 4, the molten chamber 5 for the first branch docking target well that is docked and connected respectively and the molten chamber 8 of the second branch docking target well.Due to right
The target spot connect is that the molten chamber of ready-made existing old well or horizontal segment, target spot quantity determines according to actual conditions, therefore can reduce work
Journey workload and the construction period is shortened, reduces drilling cost.The side tracking point of Multilateral Wells should select distance technique casing pipe shoe
Position other than 10m, the side tracking point of each Multilateral Wells can choose on different points, can also be in same point, horizontal segment
Drilling controls the track to bored borehole according to planned course and real brill directional data.
Easily occur gushing the complex situations such as leakage near old mining area salt deposit top plate due to newly boring multi-branched horizontal well 11, continues to bore
Into difficulty.For this complex situations, stratum water burst in docking operation, is improved well-control equipment, in multiple-limb in order to prevent
The main shaft section 12 of horizontal well in well head installs preventer swivel control head before spudding in, and carries out drilling with pressure, offset well and docking target
Well stops production without pressure release, both realizes safety drilling, in turn ensures mine continuous and stable production, shortens drilling period, section
About drilling cost.
In the horizontal segment 4 of first branch, 7 drilling process of horizontal segment of the second branch, for the longer (Chang Du of horizontal segment≤
300m), the larger problem of frictional resistance, takes and closes increase hydroscillator in conventional directional tool group, and additive for drilling fluid is added
Drilling rod, which makes a call to half root handling, one inferior mode, in anti sinking lubricant, and drilling prevents backing pressure, improves drilling efficiency, realizes quick drill
Into.
It produces halogen amount, bittern concentration after taping the latent power using technique of the invention to be obviously improved, the following are the specific of wherein 3 well groups
Parameter:
1# well group: halogen amount 577m is produced3/ d rises to 1320m3/ d, bittern concentration 271g/L rise to 300g/L；
2# well group: halogen amount 704m is produced3/ d rises to 1380m3/ d, bittern concentration 267g/L rise to 310g/L；
3# well group: halogen amount 946m is produced3/ d rises to 1320m3/ d, bittern concentration 270g/L are held essentially constant.
Claims (7)
1. the old mining area old well production potential tapping technique of rock salt, it is characterised in that: the following steps are included:
S1: according to the existing well site reasonable Arrangement well location in the old mining area of rock salt, and it is horizontal to design the multiple-limb being connected to existing well location
The casing programme of well (11) and track of taping the latent power；
S2: according to the casing programme that is designed in S1 and track of taping the latent power carry out multi-branched horizontal well (11) straight well section (2) drilling and
Well cementation；
S3: according to the casing programme that is designed in S1 and track of taping the latent power carry out multi-branched horizontal well (11) increasing hole angle section (3) drilling and
Well cementation；
S4: the drilling of multi-branched horizontal well (11) horizontal segment and each is carried out according to the casing programme that designs in S1 and track of taping the latent power
Multilateral Wells are docked and connected with existing well location；
Wherein, well track is monitored and controlled using inclinometer when straight well section (2) is crept into S2；
Direction of deflection is controlled using inclinometer, single bend PDM drilling tool in increasing hole angle section (3) drilling process in S3, by having a down dip toward salt deposit
After direction gets around old molten chamber or top plate blowby area, then orientation is adjusted, to docking target well drilling.
2. the old mining area old well production potential tapping technique of rock salt as described in claim 1, it is characterised in that: consider when being designed in S1 and quasi- pair
The positional relationship for connecing target well avoids the old wellbore of offset well, old molten chamber and top plate blowby area.
3. the old mining area old well production potential tapping technique of rock salt as described in claim 1, it is characterised in that: in S4, the drilling of horizontal segment exists
The well head installation preventer swivel control head of multi-branched horizontal well carries out drilling with pressure.
4. the old mining area old well production potential tapping technique of rock salt as described in claim 1, it is characterised in that: in S4, the water of Chang Du≤300m
Flat section increases hydroscillator on conventional directional tool and is crept into.
5. the old mining area old well production potential tapping technique of rock salt as described in claim 1, it is characterised in that: in S4, when horizontal segment drilling well is bored
Bar makes a call to half root and lifts primary, additive for drilling fluid addition anti sinking lubricant.
6. the old mining area old well production potential tapping technique of rock salt as described in claim 1, it is characterised in that: attached for salt deposit top plate in S3
It is close when gushing drop ply well cementation, the first positive injection thixotropic cement out of protective casing pipe, thixotropic cement returns to gush drop ply after, then from ring
Empty anti-squeeze method is to gushing drop ply, it is ensured that the annular space between protective casing and the borehole wall is filled up by cement.
7. the old mining area old well production potential tapping technique of rock salt as described in claim 1, it is characterised in that: in S4, multi-branched horizontal well
(11) and in existing well location handshaking procedures precise positioning instrument is used.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159244A (en) * | 2019-05-10 | 2019-08-23 | 刘森林 | Sylvite ore solution mining method |
| CN110185389A (en) * | 2019-05-05 | 2019-08-30 | 重庆城开能源有限公司 | A kind of discarded deeps mines well Geothermal Exploitation and Utilization system and method |
| CN111763041A (en) * | 2020-05-29 | 2020-10-13 | 四川盐业地质钻井大队 | Oil well cement slurry and casing cementing process in horizontal well technology |
| CN114412431A (en) * | 2022-01-14 | 2022-04-29 | 四川盐业地质钻井大队 | Groove building tool for rock salt solution mining and matched mining process |
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| CN110185389A (en) * | 2019-05-05 | 2019-08-30 | 重庆城开能源有限公司 | A kind of discarded deeps mines well Geothermal Exploitation and Utilization system and method |
| CN110159244A (en) * | 2019-05-10 | 2019-08-23 | 刘森林 | Sylvite ore solution mining method |
| CN111763041A (en) * | 2020-05-29 | 2020-10-13 | 四川盐业地质钻井大队 | Oil well cement slurry and casing cementing process in horizontal well technology |
| CN111763041B (en) * | 2020-05-29 | 2021-11-12 | 四川盐业地质钻井大队 | Oil well cement slurry and casing cementing process in horizontal well technology |
| CN114412431A (en) * | 2022-01-14 | 2022-04-29 | 四川盐业地质钻井大队 | Groove building tool for rock salt solution mining and matched mining process |
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Application publication date: 20190111 |