CN107420040B - A kind of two dimension shallow-layer horizontal well Hole clean method - Google Patents
A kind of two dimension shallow-layer horizontal well Hole clean method Download PDFInfo
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- CN107420040B CN107420040B CN201710741241.5A CN201710741241A CN107420040B CN 107420040 B CN107420040 B CN 107420040B CN 201710741241 A CN201710741241 A CN 201710741241A CN 107420040 B CN107420040 B CN 107420040B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0092—Methods relating to program engineering, design or optimisation
Abstract
The present invention relates to drilling engineering technical fields, especially with regard to a kind of variable amplitude cycloid Hole clean method of two-dimentional shallow-layer horizontal well.A kind of two dimension shallow-layer horizontal well Hole clean method, includes the following steps: that (1) determines borehole track basic design parameters；(2) in the form of the borehole track basic design parameters being collected into step (1) judge borehole track, assuming that using single circular arc borehole track, acquire the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section, successively judge that depth where the vertical depth H of kickoff point (KOP) meets the maximum deflecting ability of deflecting tool for the deflecting the boring rate Z of good ground and inclination section, i.e., using single circular arc Hole clean；(3) variable amplitude cycloid Track desigh otherwise is then used, the variable amplitude cycloid Track desigh is circular arc-cycloid orbits design, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh.The present invention only needs the basic parameter according to geological design, and calculating process is simple and convenient.
Description
Technical field
The present invention relates to drilling engineering technical fields, especially with regard to a kind of variable amplitude cycloid wellbore of two-dimentional shallow-layer horizontal well
Rail design method.
Background technique
Horizontal well technology has become the important means of Efficient Development shallow oil reservoir (300-800 meters of buried depth), due to shallow-layer
Horizontal well is with kickoff point (KOP) is shallow, inclination section is short, build angle rate higher (generally at 6 ° or more), High angle section and horizontal segment apply bit pressure
Difficult feature, key technology is mainly reflected in drill bit condensation technique, directional control technology, wellbore clean technologies in drilling process
Etc., and the premise solved these problems is reasonable Hole clean.Shallow-layer horizontal well Hole clean master at present
Tend to carry out Hole clean using the arc orbit of single increasing type, to reduce kickoff point (KOP) to greatest extent, this method by
It influences seriously, to generally require frequently to adjust pithead position, sometimes being limited by surface condition cannot achieve, and solve away from condition before target
Certainly the catenary Track desigh of large offseting distance problem due to catenary be increase curvature track, be unfavorable for enter horizontal segment wellbore construction
When frequently enter window adjustment requirement.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of two-dimentional shallow-layer horizontal well Hole clean method, with
Solve the problems, such as the Hole clean of two-dimentional shallow-layer horizontal well.
Technical program of the present invention lies in:
A kind of two dimension shallow-layer horizontal well Hole clean method, includes the following steps:
(1) borehole track basic design parameters are determined, mouth coordinate O (X0, Y0), maximum vertical depth including planned well
Enter window point A and finishing drilling point B coordinate away from S, horizontal segment before Hmax, target；
(2) in the form of the borehole track basic design parameters being collected into step (1) judge borehole track, it is assumed that using single
Circular arc borehole track acquires the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section, successively judges the vertical depth H institute of kickoff point (KOP)
Meet the maximum deflecting ability of deflecting tool for the deflecting the boring rate Z of good ground and inclination section in depth, i.e., using single circular arc
Hole clean；Its process is as follows:
1) assume using single circular arc borehole track, i.e. straight well section-arc section-horizontal segment Track desigh, then kickoff point (KOP)
Vertical depth H is H=Hmax-S (1)
2) judge whether vertical depth H is reasonable
If depth where H<0 or H>0 and H is caving ground, single circular arc Hole clean cannot be used；
If 3) 2) condition meet, the deflecting the boring rate Z of inclination section is calculated
Assuming that horizontal segment hole angle is α 0, then the deflecting the boring rate Z of inclination section is
Wherein, K is unit conversion coefficient, when curvature unit is/30 meters of degree, K=30；When curvature unit is/100 meters of degree
When, K=100；
If the size of Z has been more than the maximum deflecting ability of deflecting tool, single circular arc Hole clean cannot be used, if
H > 0, place stratum are good ground, and the deflecting the boring rate of inclination section meets the maximum deflecting ability of deflecting tool, then can be used
Single circular arc Hole clean；
(3) if otherwise variable amplitude cycloid Track desigh, the luffing pendulum can not be used using single circular arc Hole clean
Trajectory is designed as circular arc-cycloid orbits design, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh；Step
It is rapid as follows:
1) the lower going-into-well angle range of later period petroleum production engineering oil extraction pump determines preemphasis section borehole track parameter.Preemphasis section wellbore
Orbit parameter includes the segment length l1 of preemphasis section circular arc, and preemphasis section maximum hole angle α 1, horizontal segment enters window hole angle α 2；
2) variable amplitude cycloid section borehole track data calculate: the tangent line including cycloid section borehole track curve any point is oblique
Rate, variable amplitude cycloid section borehole track curve any point hole angle α, variable amplitude cycloid section borehole track segment length and any luffing pendulum
Line segment hole curvature substitutes into variable amplitude cycloid section wellbore to obtain the characteristic parameter R of kickoff point (KOP) well depth and variable amplitude cycloid equation
For the parametric equation of track to obtain fixed pendulum line segment well trajectory equation, it is shown that detailed process is as follows:
1) according to the parametric equation of variable amplitude cycloid, the parametric equation for obtaining variable amplitude cycloid section borehole track is
In formula: s is horizontal displacement, and h is vertical depth, and R is that variable amplitude cycloid moves radius of circle, and φ is dynamic circle rotation angle, and λ is luffing system
Number, λ >=1；
2) any variable amplitude cycloid section borehole track hole angle calculates
According to integral rule, the tangent slope at cycloid section borehole track curve any point is
Then variable amplitude cycloid section borehole track curve any point hole angle α is
WhenAt variable amplitude cycloid section borehole track two sections of tie points of curve:
WhenAt variable amplitude cycloid section borehole track two sections of tie points of curve:
3) any variable amplitude cycloid section borehole track segment length calculates:
Variable amplitude cycloid section borehole track segment length is
4) any variable amplitude cycloid section hole curvature calculates
The hole curvature radius of any point M are as follows:
The then hole curvature at point M are as follows:
5) determination of kickoff point (KOP) well depth
According to before vertical well depth and target away from governing equation
Wherein: R1=l1/ α 1；
According to formula (6), (8), calculated result is substituted into formula (12), using trial and error procedure, λ tentative calculation since 1,1.5,2 ...,
Original equation group is only left two unknown numbers of H0 and R, and solution obtains the characteristic parameter of kickoff point (KOP) well depth H0 and variable amplitude cycloid equation
R；
6) variable amplitude cycloid section well trajectory equation is determined
The R according to obtained in 5) calculates the parametric equation of cycloid section borehole track
It solves to obtain fixed pendulum line segment well trajectory equation.
The technical effects of the invention are that:
1, implementation of the invention only needs the basic parameter according to geological design, and calculating process is simple and convenient；
2, the present invention gets rid of limitation of the distance degree to two-dimentional shallow-layer horizontal well borehole track before target, can reasonably optimizing wellbore
The difficulty of construction of two-dimentional shallow-layer horizontal well is effectively reduced in track.
Detailed description of the invention
Fig. 1 is two-dimentional shallow-layer horizontal well list circular arc Hole clean schematic diagram of the invention；
Fig. 2 is two-dimentional shallow-layer horizontal well cycloid Hole clean schematic diagram of the invention；
Fig. 3 is the flat X well cycloid Hole clean of stone 7 of the present invention and circular arc section Track desigh comparison diagram.
Specific embodiment
A kind of two dimension shallow-layer horizontal well Hole clean method, includes the following steps:
(1) borehole track basic design parameters are determined, mouth coordinate O (X0, Y0), maximum vertical depth including planned well
Enter window point A and finishing drilling point B coordinate away from S, horizontal segment before Hmax, target；
(2) in the form of the borehole track basic design parameters being collected into step (1) judge borehole track, it is assumed that using single
Circular arc borehole track acquires the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section, successively judges the vertical depth H institute of kickoff point (KOP)
Meet the maximum deflecting ability of deflecting tool for the deflecting the boring rate Z of good ground and inclination section in depth, i.e., using single circular arc
Hole clean；Its process is as follows:
1) assume using single circular arc borehole track, i.e. straight well section-arc section-horizontal segment Track desigh, then kickoff point (KOP)
Vertical depth H is
H=Hmax-S (1)
If 2) depth where H<0 or H>0 and H is caving ground, single circular arc Hole clean cannot be used；
If 3) 2) condition meet, the deflecting the boring rate Z of inclination section is calculated
Assuming that horizontal segment hole angle is α 0, then the deflecting the boring rate Z of inclination section is
Wherein, K is unit conversion coefficient, when curvature unit is/30 meters of degree, K=30；When curvature unit is/100 meters of degree
When, K=100；
If the size of Z has been more than the maximum deflecting ability of deflecting tool, single circular arc Hole clean cannot be used, if
H > 0, place stratum are good ground, and the deflecting the boring rate of inclination section meets the maximum deflecting ability of deflecting tool, then can be used
Single circular arc Hole clean.
(3) if otherwise variable amplitude cycloid Track desigh, variable amplitude cycloid rail can not be used using single circular arc Hole clean
Road is designed as circular arc-cycloid orbits design, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh；It is as follows:
1) the lower going-into-well angle range of later period petroleum production engineering oil extraction pump determines preemphasis section borehole track parameter.Preemphasis section wellbore
Orbit parameter includes the segment length l1 of preemphasis section circular arc, and preemphasis section maximum hole angle α 1, horizontal segment enters window hole angle α 2；
2) variable amplitude cycloid section borehole track data calculate: the tangent line including cycloid section borehole track curve any point is oblique
Rate, variable amplitude cycloid section borehole track curve any point hole angle α, variable amplitude cycloid section borehole track segment length and any luffing pendulum
Line segment hole curvature substitutes into variable amplitude cycloid section wellbore to obtain the characteristic parameter R of kickoff point (KOP) well depth and variable amplitude cycloid equation
For the parametric equation of track to obtain fixed pendulum line segment well trajectory equation, it is shown that detailed process is as follows:
1) according to the parametric equation of variable amplitude cycloid, the parametric equation for obtaining variable amplitude cycloid section borehole track is
In formula: s is horizontal displacement, and h is vertical depth, and R is that variable amplitude cycloid moves radius of circle, and φ is dynamic circle rotation angle, and λ is luffing system
Number, λ >=1；
2) any variable amplitude cycloid section borehole track hole angle calculates
According to integral rule, the tangent slope at cycloid section borehole track curve any point is
Then variable amplitude cycloid section borehole track curve any point hole angle α is
WhenAt variable amplitude cycloid section borehole track two sections of tie points of curve:
WhenAt variable amplitude cycloid section borehole track two sections of tie points of curve:
3) any variable amplitude cycloid section borehole track segment length calculates:
Variable amplitude cycloid section borehole track segment length is
4) any variable amplitude cycloid section hole curvature calculates
The hole curvature radius of any point M are as follows:
The then hole curvature at point M are as follows:
5) determination of kickoff point (KOP) well depth
According to before vertical well depth and target away from governing equation
Wherein: R1=l1/ α 1；
According to formula (6), (8), calculated result is substituted into formula (12), using trial and error procedure, λ tentative calculation since 1,1.5,2 ...,
Original equation group is only left two unknown numbers of H0 and R, and solution obtains the characteristic parameter of kickoff point (KOP) well depth H0 and variable amplitude cycloid equation
R；
6) variable amplitude cycloid section well trajectory equation is determined
The R according to obtained in 5) calculates the parametric equation of cycloid section borehole track
It solves to obtain fixed pendulum line segment well trajectory equation.
Embodiment 1
Now for extending the petroleum eastern oil region bluenessization stone acupuncture needle flat X well of oil field stone 7, to its drilled wellbore trajectories globality point
Analysis.
(1) the basic geological design parameter of the flat X well of stone 7, including mouth coordinate, terrain altitude data, target spot are collected
Before data, horizontal section length, target away from etc. data, ground elevation repetition measurement；As shown in table 1.
The flat 2 well basic design data of 1 stone of table 7
(2) in the form of the basic design parameters being collected into step (1) judge borehole track
1) assume using single circular arc borehole track, as shown in Figure 1, then the vertical depth H of kickoff point (KOP) is
H=484-418.75=65.25 (14)
2) judge whether the depth of H is reasonable
It is loess formation that H > 0 but vertical depth, which are the 4th at 65.25 meters, belongs to surface layer caving ground, cannot use single circular arc well
Eye Track desigh, using variable amplitude cycloid Track desigh.
(3) variable amplitude cycloid Track desigh, as shown in Figure 2
1) preemphasis section borehole track parameter determines
Determine that the segment length l1 of preemphasis section circular arc is 270m according to the lower going-into-well angle range of later period petroleum production engineering oil extraction pump, in advance
Oblique section maximum hole angle α 1 is 40 °, and determining that horizontal segment enters window hole angle α 2 according to basic design parameters is 89.3 °, is away from S before target
418.75m。
2) variable amplitude cycloid section borehole track data calculate
It is obtained by formula (4), (5), (6), (7)
Relevant parameter is substituted into obtain
It is obtained before vertical well depth and target by formula (12) away from governing equation
Wherein: π/180 R1=l1/ α 1=270/40
Have tri- δ 1, δ 2, λ, H0 and R unknown numbers in the equation group formed according to formula (16), (17), using trial and error procedure, λ from
1,1.5,2 ... start tentative calculation, and original equation group is only left δ 1, tetra- δ 2, H0 and R unknown numbers, when λ is 1, solve available
Kickoff point (KOP) well depth H0 is 91.7507m, and the characteristic parameter R of variable amplitude cycloid equation is 122.4302m.It is stabilization at well depth 91.75m
Stratum.
The R according to obtained in 5) calculates the parametric equation of cycloid section borehole track
The hole curvature of any point M are as follows:
Any variable amplitude cycloid section borehole track segment length:
The flat 2 well Hole clean data of 2 stone of table 7
| Well depth | Hole angle | Azimuth | Vertical depth | Horizontal displacement | Hole curvature |
| 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 30.00 | 0.00 | 0.00 | 30.00 | 0.00 | 0.00 |
| 60.00 | 0.00 | 0.00 | 60.00 | 0.00 | 0.00 |
| 90.00 | 0.00 | 0.00 | 90.00 | 0.00 | 0.00 |
| 97.75 | 0.00 | 0.00 | 97.75 | 0.00 | 0.00 |
| 120.00 | 3.30 | 144.95 | 119.99 | 0.64 | 4.44 |
| 150.00 | 7.74 | 144.95 | 149.84 | 3.52 | 4.44 |
| 180.00 | 12.19 | 144.95 | 179.38 | 8.71 | 4.44 |
| 210.00 | 16.63 | 144.95 | 208.43 | 16.18 | 4.44 |
| 240.00 | 21.07 | 144.95 | 236.81 | 25.87 | 4.44 |
| 270.00 | 25.52 | 144.95 | 264.36 | 37.73 | 4.44 |
| 300.00 | 29.96 | 144.95 | 290.91 | 51.69 | 4.44 |
| 330.00 | 34.41 | 144.95 | 316.29 | 67.66 | 4.44 |
| 360.00 | 38.85 | 144.95 | 340.36 | 85.56 | 4.44 |
| 367.75 | 40.00 | 144.95 | 346.35 | 90.48 | 4.44 |
| 370.00 | 40.41 | 144.95 | 342.06 | 91.93 | 5.41 |
| 400.00 | 45.56 | 144.95 | 363.99 | 112.40 | 4.92 |
| 430.00 | 50.29 | 144.95 | 384.08 | 134.67 | 4.56 |
| 460.00 | 54.71 | 144.95 | 402.33 | 158.47 | 4.30 |
| 490.00 | 58.91 | 144.95 | 418.74 | 183.57 | 4.10 |
| 520.00 | 62.93 | 144.95 | 433.31 | 209.79 | 3.94 |
| 550.00 | 66.80 | 144.95 | 446.05 | 236.95 | 3.82 |
| 580.00 | 70.57 | 144.95 | 456.94 | 264.89 | 3.72 |
| 610.00 | 74.25 | 144.95 | 466.00 | 293.48 | 3.65 |
| 640.00 | 77.87 | 144.95 | 473.23 | 322.60 | 3.59 |
| 670.00 | 81.44 | 144.95 | 478.61 | 352.10 | 3.55 |
| 700.00 | 84.97 | 144.95 | 482.16 | 381.89 | 3.52 |
| 730.00 | 88.49 | 144.95 | 483.87 | 411.84 | 3.51 |
| 736.91 | 89.30 | 144.95 | 484.00 | 418.75 | 3.51 |
| 1230.58 | 89.30 | 144.95 | 490.00 | 912.38 | 0.00 |
By taking flat 2 well of stone 7 as an example, two kinds of circular arc, speed change cycloid sections are made respectively, as shown in figure 3, passing through frictional resistance software meter
It calculates, the results are shown in Table 3.
Two kinds of section hook load contrast tables under each operating condition of table 3
| Operating condition | Circular arc section | Cycloid profile |
| Slipping drilling | 170.8 | 174.1 |
| It pulls out of hole | 414.7 | 417.4 |
| Lower brill | 148.9 | 154.9 |
| Setting of casing | 106.7 | 109.0 |
As seen from Figure 3, speed change cycloid profile Track desigh compare circular arc section Track desigh, kickoff point (KOP) vertical depth by
65.28m increases to 91.75m, designs borehole track relative smooth.It can be seen that speed change cycloid profile rail from 3 analog result of table
Circular arc section Track desigh is compared in road design, and slipping drilling makes a trip, under the operating conditions such as setting of casing, and hook load changes less, base
This quite, can substitute circular arc section Track desigh completely.By this design each operating condition of practice of construction drilling well under practical frictional resistance with
Calculating is consistent, and setting of casing is more smooth with completion practice.
Claims (4)
1. a kind of two dimension shallow-layer horizontal well Hole clean method, characterized by the following steps:
(1) borehole track basic design parameters are determined, mouth coordinate O (X0, Y0), maximum vertical depth Hmax, target including planned well
It is preceding to enter window point A and finishing drilling point B coordinate away from S, horizontal segment；
(2) in the form of the borehole track basic design parameters being collected into step (1) judge borehole track, it is assumed that using single circular arc
Borehole track acquires the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section, successively judges that the place vertical depth H of kickoff point (KOP) is deep
Degree meets the maximum deflecting ability of deflecting tool for the deflecting the boring rate Z of good ground and inclination section, i.e., using single circular arc wellbore
Track desigh；
(3) if otherwise variable amplitude cycloid Track desigh, the variable amplitude cycloid rail can not be used using single circular arc Hole clean
Road is designed as circular arc-cycloid orbits design, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh；Step is such as
Under:
1) preemphasis section borehole track parameter, the segment length I1 including preemphasis section circular arc, preemphasis section maximum hole angle α 1, horizontal segment are determined
Enter window hole angle α 2；
2) variable amplitude cycloid section borehole track data calculate: tangent slope, change including cycloid section borehole track curve any point
Width cycloid section borehole track curve any point hole angle α, variable amplitude cycloid section borehole track segment length and any variable amplitude cycloid section
Hole curvature substitutes into variable amplitude cycloid section borehole track to obtain the characteristic parameter R of kickoff point (KOP) well depth and variable amplitude cycloid equation
Parametric equation to obtaining fixed pendulum line segment well trajectory equation.
2. a kind of two-dimentional shallow-layer horizontal well Hole clean method according to claim 1, it is characterised in that: described
Judge that borehole track form includes: in step (2)
1) assume to use single circular arc borehole track, i.e. straight well section-arc section-horizontal segment Track desigh, then the vertical depth H of kickoff point (KOP)
For
H=Hmax-S (1)
2) judge whether vertical depth H is reasonable
If depth where H<0 or H>0 and H is caving ground, single circular arc Hole clean cannot be used；
If 3) 2) condition meet, the deflecting the boring rate Z of inclination section is calculated
Assuming that horizontal segment hole angle is α 0, then the deflecting the boring rate Z of inclination section is
Wherein, K is unit conversion coefficient, when curvature unit is/30 meters of degree, K=30；When curvature unit is/100 meters of degree, K
=100；
If the size of Z has been more than the maximum deflecting ability of deflecting tool, single circular arc Hole clean cannot be used, if H > 0,
Place stratum is good ground, and the deflecting the boring rate of inclination section meets the maximum deflecting ability of deflecting tool, then Dan Yuan can be used
Arc Hole clean.
3. a kind of two-dimentional shallow-layer horizontal well Hole clean method according to claim 1, it is characterised in that: described
The detailed process that variable amplitude cycloid section borehole track data calculate are as follows:
1) according to the parametric equation of variable amplitude cycloid, the parametric equation for obtaining variable amplitude cycloid section borehole track is
In formula: s is horizontal displacement, and h is vertical depth, and R is that variable amplitude cycloid moves radius of circle, and φ is dynamic circle rotation angle, and λ is radius variation ratio, λ
≥1；
2) any variable amplitude cycloid section borehole track hole angle calculates
According to integral rule, the tangent slope at cycloid section borehole track curve any point is
Then variable amplitude cycloid section borehole track curve any point hole angle α is
WhenAt variable amplitude cycloid section borehole track two sections of tie points of curve:
WhenAt variable amplitude cycloid section borehole track two sections of tie points of curve:
3) any variable amplitude cycloid section borehole track segment length calculates:
Variable amplitude cycloid section borehole track segment length is
4) any variable amplitude cycloid section hole curvature calculates
The hole curvature radius of any point M are as follows:
The then hole curvature at point M are as follows:
5) determination of kickoff point (KOP) well depth
According to before vertical well depth and target away from governing equation
Wherein: R1=l1/ α 1；
According to formula (6), (8), calculated result is substituted into formula (12), using trial and error procedure, λ tentative calculation since 1,1.5,2 ..., original side
Journey group is only left two unknown numbers of H0 and R, and solution obtains the characteristic parameter R of kickoff point (KOP) well depth H0 and variable amplitude cycloid equation；
6) variable amplitude cycloid section well trajectory equation is determined
The R according to obtained in 5) calculates the parametric equation of cycloid section borehole track
It solves to obtain fixed pendulum line segment well trajectory equation.
4. a kind of two-dimentional shallow-layer horizontal well Hole clean method according to claim 1, it is characterised in that: described
Determine that preemphasis section borehole track parameter is determined according to the lower going-into-well angle range of later period petroleum production engineering oil extraction pump.
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| CN108153941B (en) * | 2017-12-07 | 2021-03-16 | 陕西延长石油(集团)有限责任公司研究院 | Engineering solving method for variable-curvature well track design |
| CN109973072A (en) * | 2017-12-27 | 2019-07-05 | 中移（杭州）信息技术有限公司 | A kind of frictional resistance prediction technique and device |
| CN110069796A (en) * | 2018-01-23 | 2019-07-30 | 中石化石油工程技术服务有限公司 | A kind of three-dimensional horizontal well wellbore rail design method |
| CN111324963B (en) * | 2020-03-02 | 2021-07-30 | 北京四利通控制技术股份有限公司 | Method for automatically optimizing and designing track of borehole to be drilled |
| CN111472756B (en) * | 2020-05-28 | 2023-06-30 | 中国石油天然气集团有限公司 | Calculation method for safety well bevel angle of horizontal well deflecting section |
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| CN1936264A (en) * | 2005-09-20 | 2007-03-28 | 中国石油化工股份有限公司 | Method for designing well-drilling borehole track |
| CN103699738B (en) * | 2013-12-20 | 2017-02-22 | 中国石油大学(华东) | Sidetrack horizontal well track design method under control point constraint condition |
| CN103993830B (en) * | 2014-05-13 | 2016-02-17 | 中国石油化工股份有限公司 | A kind of method determining the front middle major radius track apart from horizontal well of two-dimentional little target |
| CN104481400B (en) * | 2014-12-10 | 2016-08-10 | 中国石油化工股份有限公司 | A kind of three-dimensional horizontal well track control method |
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