CN104695863B - Method for correcting track of horizontal well - Google Patents
Method for correcting track of horizontal well Download PDFInfo
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- CN104695863B CN104695863B CN201510041083.3A CN201510041083A CN104695863B CN 104695863 B CN104695863 B CN 104695863B CN 201510041083 A CN201510041083 A CN 201510041083A CN 104695863 B CN104695863 B CN 104695863B
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- 238000000034 method Methods 0.000 title abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 110
- 238000002309 gasification Methods 0.000 claims abstract description 68
- 238000010276 construction Methods 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 15
- 238000003032 molecular docking Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a method for correcting track of a horizontal well. The method for correcting the track of the horizontal well is used for mutually butting the horizontal well with butting guiding holes, wherein a practical drilling track position of the horizontal well and a designed gasification tunnel track of the horizontal well are approximately the same, and the practical drilling track is regulated by forming two symmetrical guiding holes in the two sides of a ground horizontal projection of the gasification tunnel track, so that the practical drilling track is consistent with the gasification tunnel track. According to the method for correcting the track of the horizontal well, the smoothness of a well track can be ensured, and the drilling frictional resistance is reduced, so that the construction difficulty of a horizontal section is reduced, the safety construction of well drilling is facilitated, and the construction target hitting rate is improved.
Description
Technical field
The present invention relates to a kind of coal underground gasification technology field, refers in particular to horizontal well path bearing calibration.
Background technology
Coal underground gasification technology be primarily referred to as coal, coke either the solid fuel such as semicoke high-temperature pressure or add press strip
React with gasifying agent under part, be converted into the process of gaseous product or a small amount of residue.The gasifying agent is mainly vapor, sky
Gas (either oxygen) or their gaseous mixture.Coal gasification processes can be used to produce fuel gas, used as industrial kiln gas
Or town gas, it can also be used to gaseous mixture is manufactured, as the raw material of synthesis ammonia, synthesizing methanol and synthetic liquid fuel, therefore
Coal gasification is one of important technology of Coal Chemical Industry.
Prevailing peupendicular hole, but peupendicular hole is often utilized to yield poorly, develop in China's coal seam gasification exploitation at this stage
High cost, therefore seriously constrain the increasing the storage in coal seam and open yield, bring severe challenge to the high-efficiency and economic exploitation in coal seam；And water
Especially extended horizontal well is a kind of important channel for realizing coal seam gasification Efficient Development to horizontal well, but horizontal well is difficult to lower rafting
Equipment is adopted, therefore generally then subdrilling gas production Vertical Well is mutually butted with horizontal well, using the strong of drill bit rear end setting during docking
Magnetic joint is completed.Current both at home and abroad near-end docking technique relative maturity, the field signal that the strong magnetic joint is produced it is effective
Distance is typically between 50 to 60 meters, but the development developed with coal seam gasification, occurs in that the new coal bed gas such as U-shaped well, E type wells
The well type of horizontal well, and these well type are the characteristics of have horizontal range long.Conventional measurement while drilling mode can be produced with well depth increase
Accumulated error, accumulated error is excessive, and butt-joint operation may be made to need the well section of adjustment more than 60 meters, so as to cause well docking to be lost
Lose, the accident of landfill well occur, it is also possible to cause horizontal well larger track adjustment occur, so as to be difficult to decentralization production supporting
Sleeve pipe, affects the whole structure of coal seam gasification exploitation.
In order to overcome the problems referred to above, a kind of existing method is the pipe nipple structure by changing the strong magnetic joint of docking, will be right
Connect measured distance and increase to 90 to 95 meters, so as to realize being mutually butted for Vertical Well and horizontal well；Another kind of method such as Fig. 1 institutes
Show, docking pilot hole 120 is set at the position for meeting design requirement, then by changing the pipe nipple structure for docking strong magnetic joint
Vertical Well is transitted on horizontal well design track 130, realize that the horizontal well is mutually butted with the pilot hole 120 that docks.
No matter which kind of docking mode is adopted, for extended horizontal well, because horizontal segment distance is longer, bored in actual monitoring
During head signal, because the apparatus measures of early stage can produce cumulative errors, make drill bit may substantial deviation planned course, seriously
When cause to miss the target；In order to avoid above-mentioned situation, it may be necessary to significantly adjust drilling trajectory in the hope of hitting.What is either occurred is de-
Target situation or the significantly situation of adjustment drilling trajectory, can cause gasification tunnel extremely irregular, logical to underground gasification
The construction in road brings and has a strong impact on.
The content of the invention
For this purpose, the technical problem to be solved be dock when overcoming horizontal well construction in prior art it is inaccurate
Result in the need for significantly adjusting drilling trajectory and provide a kind of docking success rate of improving to prevent the problems such as missing the target
Horizontal well path bearing calibration.
To solve above-mentioned technical problem, a kind of horizontal well path bearing calibration of the present invention, for by the level
Well is mutually butted with pilot hole is docked, wherein the gasification tunnel rail that the drilling trajectory position of the horizontal well has been designed with horizontal well
Mark is roughly the same, comprises the steps：Step S1：Two are arranged according to the gasification tunnel track in the both sides that ground level is projected
Individual symmetrical pilot hole；Step S2：Led relative to described by the drilling trajectory position of horizontal well described in the guiding hole measurement
To hole shaft bottom relatively accurate position；Step S3:The reality of the horizontal well obtained according to the relatively accurate position and measurement
Bore the actual position that track position determines drilling trajectory；Step S4：Constantly adjusting drilling trajectory according to the actual position makes
It is consistent with the gasification tunnel track.
In one embodiment of the invention, in step S1, what the gasification tunnel track projected in ground level
When both sides arrange pilot hole, the distance of the pilot hole and the gasification tunnel track between ground level projection need to meet conjunction
Suitable distance, so that the pilot hole can monitor drilling trajectory.
In one embodiment of the invention, in step S2, by the reality of horizontal well described in the guiding hole measurement
Bore track position as follows the step of the relatively accurate position in shaft bottom relative to the pilot hole：The pilot hole is determined first
Shaft bottom coordinate；Then the coordinate of the drilling trajectory position of the horizontal well is detected in the pilot hole；Finally, led according to described
Determine the coordinate of the relative position to the coordinate of the drilling trajectory position of the shaft bottom coordinate and the horizontal well in hole.
In one embodiment of the invention, the shaft bottom coordinate of the pilot hole is measured by gyroscope.
In one embodiment of the invention, the coordinate of the drilling trajectory position of the horizontal well is by the pilot hole
Interior decentralization monitoring inserting tube measures respectively hole deviation, orientation and the vertical depth of the drilling trajectory position of the horizontal well.
In one embodiment of the invention, in step S3, the drilling trajectory position of the horizontal well is according to described
Horizontal well itself Survey Software is calculated.
In one embodiment of the invention, in step S4, according to the actual position, analyzed using software for calculation
The orientation of construction in later period, constantly adjusting drilling trajectory makes it be consistent with the gasification tunnel track designed.
Present invention also offers another embodiment, a kind of horizontal well path bearing calibration, for by the horizontal well
It is mutually butted with pilot hole is docked, wherein the gasification tunnel track that the drilling trajectory position of the horizontal well has been designed with horizontal well
It is roughly the same, comprise the steps：Step S1：Two are arranged according to the gasification tunnel track in the both sides that ground level is projected
Symmetrical pilot hole；Step S2：By the drilling trajectory position of horizontal well described in the guiding hole measurement relative to the guiding
Relatively accurate position of the hole in shaft bottom；Step S3：The real of the horizontal well obtained according to the relatively accurate position and measurement is bored
Track position determines the actual position of drilling trajectory；Step S4：Drilling trajectory is constantly adjusted according to the actual position to complete
Once adjust；Step S5：Continue to arrange two symmetrical guiding in the both sides that ground level is projected in the gasification tunnel track
Hole, through above-mentioned identical step secondary adjustment is completed, and constantly adjustment is circulated successively, finally makes drilling trajectory and the gas for designing
Change channel traces to be consistent.
In another embodiment of the present invention, the pilot hole is sequentially arranged in the drilling trajectory position of the horizontal well
Dock between pilot hole with described.
In another embodiment of the present invention, the particular number of the pilot hole is determined by the horizontal section length of horizontal well
It is fixed.
The above-mentioned technical proposal of the present invention has compared to existing technology advantages below：
Instant invention overcomes traditional single pilot hole timing causes the low problem of butt hole correction accuracy, data are reduced
Measurement cumulative errors, it is to avoid well drilling trajectory adjustment amplitude is excessive and " S " the type track effect that formed, improves CBM Drainage
Adopt effect；Meanwhile, the present invention keeps well track to smooth, and reduces drilling frictional resistance, reduces horizontal segment difficulty of construction, profit
In drilling safety construction, improve construction and hit rate.
Description of the drawings
In order that present disclosure is more likely to be clearly understood, the specific embodiment below according to the present invention is simultaneously combined
Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the schematic diagram of existing level well trajectory corrector；
Fig. 2 is the trajectory corrector schematic diagram of horizontal well of the present invention；
Fig. 3 is the concrete schematic diagram of trajectory corrector of horizontal well of the present invention.
Specific embodiment
Embodiment one：
As shown in Figures 2 and 3, a kind of horizontal well path bearing calibration is present embodiments provided, for by the horizontal well
Docking pilot hole 12 is mutually butted, wherein the gasification tunnel rail that the drilling trajectory position 11 of the horizontal well has been designed with horizontal well
Mark 13 is roughly the same, comprises the steps：Step S1：Set in the both sides that ground level is projected according to the gasification tunnel track 13
Put one group of totally two symmetrical pilot hole 14A and 14B；Step S2：The horizontal well is measured by the pilot hole 14A and 14B
Drilling trajectory position 11 relative to the pilot hole 14A and 14B shaft bottom relatively accurate position 11A and 11B；Step S3:
Determine real brill rail in the drilling trajectory position 11 of the horizontal well obtained according to the relatively accurate position 11A and 11B and measurement
The actual position 11C of mark；Step S4：Constantly adjusting drilling trajectory according to the actual position 11C makes it with the gasification tunnel
Track 13 is consistent.
Horizontal well path bearing calibration of the present invention, for by the horizontal well with to dock pilot hole 12 mutually right
Connect, wherein the drilling trajectory position 11 of the horizontal well is roughly the same with the gasification tunnel track 13 that horizontal well has been designed, it is described
In step S1, one group of totally two pilot hole is arranged in the both sides that ground level is projected according to the gasification tunnel track 13, respectively
For pilot hole 14A and pilot hole 14B, the distance phase of the pilot hole 14A and pilot hole 14B to the gasification tunnel track 13
Together, so that the pilot hole 14A and pilot hole 14B are symmetrically distributed in the both sides of the gasification tunnel track 13, in order to sentence
The drilling trajectory position of the disconnected horizontal well；In step S2, the real of the horizontal well is measured by the pilot hole 14A and is bored
Track position 11 is measured relative to the pilot hole 14A in the relatively accurate position 11A in shaft bottom and by the pilot hole 14B
, in the relatively accurate position 11B in shaft bottom, it is easy to into one relative to the pilot hole 14B drilling trajectory position 11 of the horizontal well
Step judges the drilling trajectory position 11 of the horizontal well, due to Survey Software precision problem and operating personnel's method of operating problem,
The data for finally measuring are made all to deposit certain error, therefore the well track position measured respectively according to two pilot holes 14A and 14B
Put 11A and 11B and misaligned；In step S3, obtained according to the relatively accurate position 11A and 11B and actual measurement
The drilling trajectory position 11 of horizontal well determine the actual position 11C of drilling trajectory；In step S4, according to described true
Position 11C constantly adjusts drilling trajectory makes it be consistent with the gasification tunnel track 13 designed, it is achieved thereby that real bore rail
Mark with dock being mutually butted for pilot hole 12.The present invention due in actual monitoring bit signal, by constantly adjusting by a small margin
Drilling trajectory, therefore DATA REASONING cumulative errors are reduced, overcome the big problem of single pilot hole correction time error, it is to avoid
" S " the type track effect that well drilling trajectory adjustment amplitude is excessive and is formed, improves coal bed gas extraction effect, and formed
Gasification tunnel is smoothed, and reduces drilling frictional resistance, so that horizontal segment difficulty of construction is reduced, is applied beneficial to follow-up drilling safety
Work, effectively increases construction and hits rate.
In step S1, the gasification tunnel track 13 arranges pilot hole 14A and 14B in the both sides that ground level is projected
When, the distance of the pilot hole 14A and 14B and the gasification tunnel track 13 between ground level projection need to meet suitably
Distance so that the pilot hole 14A and 14B can monitor drilling trajectory, in practice of construction, when the pilot hole 14A and 14B with
When distance of the gasification tunnel track 13 between ground level projection is in the range of 50 meters, drilling trajectory can be monitored.
Specifically, the distance of the pilot hole 14A and 14B and the gasification tunnel track 13 between ground level projection at 5 meters extremely
When 10 meters, the effect of the pilot hole 14A and 14B monitoring drilling trajectories is more preferable.Meanwhile, the pilot hole 14A and the gasification
Distance of the channel traces 13 between ground level projection is equal to the pilot hole 14B with the gasification tunnel track 13 on ground
The distance between floor projection.Wherein, horizontal displacement length of the spacing of two pilot holes according to the gasification tunnel track 13
To determine, in order to ensure the rounding and docking success rate of gasification tunnel track, with reference to practical construction experience, horizontal displacement length
It is easy to construction when typically between 200 meters to 300 meters.
In step S2, the drilling trajectory position 11 for measuring the horizontal well by the pilot hole 14A and 14B is relative
It is specific as follows the step of relatively accurate position in shaft bottom in the pilot hole 14A and 14B：The pilot hole 14A is determined first
With the shaft bottom coordinate of pilot hole 14B；Then the real of the horizontal well is detected in the pilot hole 14A and pilot hole 14B and bores rail
The coordinate of mark position 11；Finally, according to the shaft bottom coordinate and the reality of the horizontal well of the pilot hole 14A and pilot hole 14B
The coordinate for boring track position 11 determines the coordinate of the relatively accurate position.
Specifically, the shaft bottom coordinate of the pilot hole 14A and pilot hole 14B is measured by gyroscope；The horizontal well
The coordinate of drilling trajectory position 11 is bored by the decentralization monitoring inserting tube in the pilot hole 14A so as to measure the real of the horizontal well
The hole deviation of track position 11, orientation and vertical depth, the drilling trajectory position 11 of the horizontal well is by under in the pilot hole 14B
Monitoring inserting tube is put so as to measure hole deviation, orientation and the vertical depth of the drilling trajectory position 11 of the horizontal well.Due to obtaining institute
The shaft bottom coordinate of pilot hole 14A and pilot hole 14B is stated, by monitoring inserting tube the drilling trajectory position of the horizontal well can be measured
The vertical depth of 11 shaft bottom grid bearing coordinate, well track and monitoring inserting tube position, calculates hence with Survey Software
The drilling trajectory position 11 of the horizontal well is relative to the pilot hole 14A in the relatively accurate position 11A in shaft bottom and described
The drilling trajectory position 11 of horizontal well relative to the pilot hole 14B shaft bottom relatively accurate position 11B.
In order to pilot hole 14A and 14B described in utility can be with the drilling trajectory positions 11 of horizontal well described in accurate measurements
Drilling trajectory, the pilot hole 14A and 14B is Vertical Well, and the vertical depth of the pilot hole 14A and 14B sets with described
The vertical depth of the gasification tunnel track 13 of meter is identical.
In step S3, the reality of the horizontal well for obtaining is measured according to the relatively accurate position 11A and 11B and actually
The actual position 11C that track position 11 determines drilling trajectory is bored, wherein itself Survey Software can be counted according to the horizontal well
Calculation draws the drilling trajectory position 11 of the horizontal well, the actual position 11C can by the mean values of three or according to
Specific formula is calculated.
In step S4, according to the actual position 11C, the orientation of construction in later period is analyzed using software for calculation, constantly
Adjusting orientation, left-right deviation and the vertical depth of drilling trajectory makes it be consistent with the gasification tunnel track 13 designed.
Embodiment two：
The present embodiment two is identical with the method and step part of embodiment one, and embodiment one is with two symmetrical guiding in a group
The bearing calibration of horizontal well path is illustrated as a example by hole, is wanted because the length of the horizontal segment of the horizontal well needs to meet to construct
Ask, in the construction of actual seam mining, in order to ensure that drilling trajectory is consistent with the gasification tunnel track 13 designed, generally
Some groups of pilot holes are set in the both sides that ground level is projected in the gasification tunnel track 13, and every group of pilot hole includes two
Symmetrical pilot hole, its particular number determines by the horizontal section length of horizontal well, by the continuous of some groups of pilot holes
Repeatedly adjustment drilling trajectory is so that it is consistent with the gasification tunnel track 13 designed.
The step of describing horizontal well path bearing calibration in detail by taking two groups of totally four pilot holes as an example below, step S1：Root
Two symmetrical pilot hole 14A and pilot hole 14B are set in the both sides that ground level is projected according to the gasification tunnel track 13；
Step S2：Lead relative to described the drilling trajectory position 11 that the horizontal well is measured by the pilot hole 14A and pilot hole 14B
To hole 14A and pilot hole 14B in the relatively accurate position 11A and 11B in shaft bottom, specifically, institute is measured by the pilot hole 14A
The drilling trajectory position 11 of horizontal well is stated relative to the pilot hole 14A in the relatively accurate position 11A in shaft bottom and by institute
State pilot hole 14B and measure the drilling trajectory position 11 of the horizontal well relative to the pilot hole 14B in the relatively accurate of shaft bottom
Position 11B；Step S3：The drilling trajectory position of the horizontal well obtained according to the relatively accurate position 11A and 11B and measurement
The 11 actual position 11C for determining drilling trajectory；Step S4：Drilling trajectory is constantly adjusted according to the actual position 11C to complete
Once adjust；Step S5：Continue that the both sides setting two that project in ground level in the gasification tunnel track 13 is symmetrical to be led
Xiang Kong, through above-mentioned identical step secondary adjustment is completed, and by constantly adjustment drilling trajectory and the gasification for designing are finally made
Channel traces are consistent.
For the horizontal well of big displacement, it may be necessary to arrange more pilot holes to correct drilling trajectory, now each two
Pilot hole is respectively arranged on the both sides that the gasification tunnel track 13 designed projects in ground level, respectively through once adjusting
And after secondary adjustment, constantly adjust repeatedly successively, control drilling trajectory meets design requirement, it is ensured that gasification tunnel horizontal segment rail
Mark is round and smooth steady, and completes final docking construction, so as to the gasification tunnel track for being always ensured that drilling trajectory Yu design
It is consistent.
It is to be noted that：Described two symmetrical pilot holes be sequentially arranged in the drilling trajectory position of the horizontal well with
Between the docking pilot hole so that pilot hole drilling trajectory position successively away from the horizontal well and move closer to it is described right
Pilot hole is connect, so as to be beneficial to detect drilling trajectory, it is to avoid drilling trajectory deviates on a large scale with the gasification tunnel track designed.
No matter embodiment one or embodiment two, drilling well of the present invention in construction, based on geological conditions and construction
The reason for aspect, the drilling trajectory position 11 of the horizontal well is caused to occur differing with the gasification tunnel track 13 designed
Cause；The pilot hole 14A and 14B occurs different degrees of inclination and distortion, cause bottom hole location ground floor projection with
There is deviation in the position of well head, therefore in trimming process, needs to be drilled in the physical location in shaft bottom, so as to profit after calculating deformation
In the actual position for determining drilling trajectory.In addition, the present invention not only can be in the gasification tunnel of removable air injection pipe be built
Using can be applying in having well formula gasification tunnel construction.
To sum up, above technical scheme of the present invention has advantages below：
1. in horizontal well path bearing calibration of the present invention, for by the horizontal well with to dock pilot hole mutually right
Connect, wherein the drilling trajectory position of the horizontal well is roughly the same with the gasification tunnel track that horizontal well has been designed, the step
In S1, two symmetrical pilot holes are arranged in the both sides that ground level is projected according to the gasification tunnel track, in order to judge
State the drilling trajectory position of horizontal well；In step S2, by the drilling trajectory position of horizontal well described in the guiding hole measurement
The relatively accurate position in shaft bottom relative to the pilot hole is put, is easy to determine whether the drilling trajectory position of the horizontal well
Put；In step S3, the drilling trajectory position of the horizontal well obtained according to the relatively accurate position and measurement is determined
The actual position of drilling trajectory；In step S4, constantly adjusting drilling trajectory according to the actual position makes it and designs
Gasification tunnel track be consistent, it is achieved thereby that drilling trajectory with dock being mutually butted for pilot hole.The present invention due to
During actual monitoring bit signal, by constantly adjusting drilling trajectory by a small margin, therefore DATA REASONING cumulative errors are reduced, it is to avoid
" S " the type track effect that well drilling trajectory adjustment amplitude is excessive and is formed, improves coal bed gas extraction effect, and is formed
Gasification tunnel smooth, reduce drilling frictional resistance so that horizontal segment difficulty of construction reduce, beneficial to drilling safety construction,
Effectively increase construction to hit rate.
2. gasification tunnel track of the present invention is provided with some groups of pilot holes in the both sides that ground level is projected, wherein often
Group includes two symmetrical pilot holes, the horizontal well of big displacement is corrected due to needing more multigroup pilot hole to real brill rail
Mark, now respectively through the once adjustment and the secondary adjustment of second group of pilot hole of first group of pilot hole after, circulate successively not
Disconnected adjustment, finally makes drilling trajectory be consistent with the gasification tunnel track designed.
Obviously, above-described embodiment is only intended to clearly illustrate example, not to the restriction of embodiment.For
For those of ordinary skill in the art, the change or change of other multi-forms can also be made on the basis of the above description
It is dynamic.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or change
Move still in the protection domain of the invention.
Claims (10)
1. a kind of horizontal well path bearing calibration, for the horizontal well to be mutually butted with pilot hole (12) is docked, wherein institute
The drilling trajectory position (11) for stating horizontal well is roughly the same with the gasification tunnel track (13) that horizontal well has been designed, including following step
Suddenly：
Step S1：Two symmetrical pilot holes are arranged in the both sides that ground level is projected according to the gasification tunnel track (13)
(14A,14B)；
Step S2：The drilling trajectory position (11) of the horizontal well is measured relative to described by the pilot hole (14A, 14B)
Relatively accurate position (11A, 11B) of the pilot hole (14A, 14B) in shaft bottom；
Step S3：The drilling trajectory position of the horizontal well obtained according to the relatively accurate position (11A, 11B) and measurement
(11) actual position (11C) of drilling trajectory is determined；
Step S4：According to the actual position (11C), constantly adjustment drilling trajectory makes it protect with the gasification tunnel track (13)
Hold consistent.
2. horizontal well path bearing calibration according to claim 1, it is characterised in that：In step S1, the gasification
Channel traces (13) when both sides that ground level is projected arrange pilot hole (14A, 14B), the pilot hole (14A, 14B) and institute
Stating distance of the gasification tunnel track (13) between ground level projection need to meet suitable distance, so that the pilot hole
(14A, 14B) can monitor drilling trajectory.
3. horizontal well path bearing calibration according to claim 1, it is characterised in that：In step S2, by described
Pilot hole (14A, 14B) measures the drilling trajectory position (11) of the horizontal well relative to the pilot hole (14A, 14B) in well
The step of relatively accurate position (11A, 11B) at bottom, is as follows：The shaft bottom coordinate of the pilot hole (14A, 14B) is determined first；So
Detect the coordinate of the drilling trajectory position (11) of the horizontal well in the pilot hole (14A, 14B) afterwards；Finally, according to described
The coordinate of the shaft bottom coordinate of pilot hole (14A, 14B) and the drilling trajectory position (11) of the horizontal well is aligned described in determining
The coordinate of true position (11A, 11B).
4. horizontal well path bearing calibration according to claim 3, it is characterised in that：The pilot hole (14A, 14B)
Shaft bottom coordinate is measured by gyroscope.
5. horizontal well path bearing calibration according to claim 3, it is characterised in that：The drilling trajectory position of the horizontal well
The coordinate for putting (11) measures respectively the real brill rail of the horizontal well by the decentralization monitoring inserting tube in the pilot hole (14A, 14B)
The hole deviation of mark position (11), orientation and vertical depth.
6. horizontal well path bearing calibration according to claim 1, it is characterised in that：In step S3, the level
According to the horizontal well, itself Survey Software is calculated for the drilling trajectory position (11) of well.
7. horizontal well path bearing calibration according to claim 1, it is characterised in that：In step S4, according to described
Actual position (11C), using software for calculation the orientation of construction in later period is analyzed, and constantly adjustment drilling trajectory makes it with the gas for designing
Change channel traces (13) to be consistent.
8. a kind of horizontal well path bearing calibration, for the horizontal well to be mutually butted with pilot hole (12) is docked, wherein institute
The drilling trajectory position (11) for stating horizontal well is roughly the same with the gasification tunnel track (13) that horizontal well has been designed, including following step
Suddenly：
Step S1：Two symmetrical pilot holes are arranged in the both sides that ground level is projected according to the gasification tunnel track (13)
(14A,14B)；
Step S2：The drilling trajectory position (11) of the horizontal well is measured relative to described by the pilot hole (14A, 14B)
Relatively accurate position (11A, 11B) of the pilot hole (14A, 14B) in shaft bottom；
Step S3：The drilling trajectory position of the horizontal well obtained according to the relatively accurate position (11A, 11B) and measurement
(11) actual position (11C) of drilling trajectory is determined；
Step S4：According to the actual position (11C), constantly adjustment drilling trajectory completes once to adjust；
Step S5：Continue to arrange two symmetrical guiding in the both sides that ground level is projected in the gasification tunnel track (13)
Hole, through above-mentioned identical step secondary adjustment is completed, and constantly adjustment is circulated successively, finally makes drilling trajectory and the gas for designing
Change channel traces to be consistent.
9. horizontal well path bearing calibration according to claim 8, it is characterised in that：The pilot hole is sequentially arranged in institute
Dock between pilot hole with described the drilling trajectory position for stating horizontal well.
10. horizontal well path bearing calibration according to claim 8 or claim 9, it is characterised in that：The concrete number of the pilot hole
Amount is determined by the horizontal section length of horizontal well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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