CN107420040A - A kind of two-dimentional shallow-layer horizontal well Hole clean method - Google Patents
A kind of two-dimentional shallow-layer horizontal well Hole clean method Download PDFInfo
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Abstract
The present invention relates to drilling engineering technical field, especially with regard to a kind of variable amplitude cycloid Hole clean method of two-dimentional shallow-layer horizontal well.A kind of two-dimentional shallow-layer horizontal well Hole clean method, comprises the following steps：（1）Determine borehole track basic design parameters；（2）With step（1）In the borehole track basic design parameters that are collected into judge borehole track form, assuming that using single circular arc borehole track, try to achieve the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section, 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 successively, i.e., using single circular arc Hole clean；（3）It is on the contrary then use variable amplitude cycloid Track desigh, then using Arc Cycloid Track desigh, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh.The basic parameter of the invention only needed according to geological design, calculating process are simple and convenient.
Description
Technical field
The present invention relates to drilling engineering technical field, especially with regard to a kind of variable amplitude cycloid well of two-dimentional shallow-layer horizontal well
Rail design method.
Background technology
Horizontal well technology turns into Efficient Development shallow oil reservoir（Buried depth 300-800 rice）Important means, due to shallow-layer
Horizontal well has that kickoff point (KOP) is shallow, inclination section is short, build angle rate is higher（Typically more than 6 °）, High angle section and horizontal segment apply the pressure of the drill
The characteristics of difficult, key technology is mainly reflected in drill bit condensation technique, directional control technology, well clean technologies in drilling process
Etc., and the premise for solving these problems is rational 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
Influence seriously, to generally require frequently to adjust pithead position, sometimes being limited by surface condition to realize, and solves 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 entering horizontal segment wellbore construction
When frequently enter window adjustment requirement.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of two-dimentional shallow-layer horizontal well Hole clean method, with
Solves 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-dimentional shallow-layer horizontal well Hole clean method, comprises the following steps：
（1）Borehole track basic design parameters are determined, include the mouth coordinate O of planned well（X0, Y0）, maximum vertical depth Hmax, target
It is preceding to enter window point A and finishing drilling point B coordinates away from S, horizontal segment；
（2）With step（1）In the borehole track basic design parameters that are collected into judge borehole track form, it is assumed that use single circular arc
Borehole track, the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section is tried to achieve, judge that the vertical depth H places of kickoff point (KOP) are deep successively
The deflecting the boring rate Z spent for good ground and inclination section meets the maximum deflecting ability of deflecting tool, i.e., using single circular arc well
Track desigh；Its process is as follows：
1）Assuming that using 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 H<0, or H>Depth where 0 and H is caving ground, then can not use single circular arc Hole clean；
3）If 2）Condition meets, then calculates the deflecting the boring rate Z of inclination section
Assuming that horizontal segment hole angle is, then the deflecting the boring rate Z of inclination section be
（2）
Wherein, K is unit conversion coefficient, when curvature unit is spends/30 meters, K=30；When curvature unit is spends/100 meters, K=
100；
If Z size has exceeded the maximum deflecting ability of deflecting tool, single circular arc Hole clean can not 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 can use Dan Yuan
Arc Hole clean.
（3）If on the contrary can not use single circular arc Hole clean, using variable amplitude cycloid Track desigh, then using circle
Arc-cycloid orbits design, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh；Step is as follows：
1）The lower going-into-well angle range of later stage petroleum production engineering oil extraction pump determines preemphasis section borehole track parameter.Preemphasis section well rail
Road parameter includes the segment length of preemphasis section circular arc, preemphasis section maximum hole angle, horizontal segment enters window hole angle；
2）Variable amplitude cycloid section borehole track data calculate：Tangent slope including cycloid section borehole track curve any point, become
Width cycloid section borehole track curve any point hole angle, variable amplitude cycloid section borehole track segment length and any variable amplitude cycloid section
Hole curvature, so as to obtain the characteristic parameter R of kickoff point (KOP) well depth and variable amplitude cycloid equation, substitute into variable amplitude cycloid section borehole track
Parametric equation so as to obtain fixed pendulum line segment well trajectory equation, 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
（3）
In formula：S is horizontal displacement, and h is vertical depth, and R is that variable amplitude cycloid moves radius of circle,To move the circle anglec of rotation,For radius variation ratio,；
2）Any variable amplitude cycloid section borehole track hole angle calculates
According to integration rule, the tangent slope at cycloid section borehole track curve any point is
（4）
Then variable amplitude cycloid section borehole track curve any point hole angleFor
（5）
When, at variable amplitude cycloid section borehole track two sections of tie points of curve：
（6）
When, at variable amplitude cycloid section borehole track two sections of tie points of curve：
（7）
3）Any variable amplitude cycloid section borehole track segment length calculates：
（8）
Variable amplitude cycloid section borehole track segment length is
（9）
4）Any variable amplitude cycloid section hole curvature calculates
Any point M hole curvature radius is：
（10）
Then the hole curvature at point M is：
（11）
5）The determination of kickoff point (KOP) well depth
According to before vertical well depth and target away from governing equation
（12）
Wherein：；
According to formula（6）、（8）, result of calculation, substitute into formula（12）, using trial and error procedure,The 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）Determine variable amplitude cycloid section well trajectory equation
According to the R obtained in 5), the parametric equation of cycloid section borehole track is calculated
（13）
Solve so as to obtain fixed pendulum line segment well trajectory equation.
The technical effects of the invention are that：
1st, implementation of the invention only needs the basic parameter according to geological design, and calculating process is simple and convenient；
2nd, the present invention has broken away from limitation of the distance degree to two-dimentional shallow-layer horizontal well borehole track before target, can reasonably optimizing well rail
Road, effectively reduce the difficulty of construction of two-dimentional shallow-layer horizontal well.
Brief description of the drawings
Fig. 1 is the two-dimentional shallow-layer horizontal well list circular arc Hole clean schematic diagram of the present invention.
Fig. 2 is the two-dimentional shallow-layer horizontal well cycloid Hole clean schematic diagram of the present invention.
Fig. 3 is the flat X wells cycloid Hole clean of stone 7 of the present invention and circular arc section Track desigh comparison diagram.
Embodiment
A kind of two-dimentional shallow-layer horizontal well Hole clean method, comprises the following steps：
（1）Borehole track basic design parameters are determined, include the mouth coordinate O of planned well（X0, Y0）, maximum vertical depth Hmax, target
It is preceding to enter window point A and finishing drilling point B coordinates away from S, horizontal segment；
（2）With step（1）In the borehole track basic design parameters that are collected into judge borehole track form, it is assumed that use single circular arc
Borehole track, the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section is tried to achieve, judge that the vertical depth H places of kickoff point (KOP) are deep successively
The deflecting the boring rate Z spent for good ground and inclination section meets the maximum deflecting ability of deflecting tool, i.e., using single circular arc well
Track desigh；Its process is as follows：
1）Assuming that using 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 H<0, or H>Depth where 0 and H is caving ground, then can not use single circular arc Hole clean；
3）If 2）Condition meets, then calculates the deflecting the boring rate Z of inclination section
Assuming that horizontal segment hole angle is, then the deflecting the boring rate Z of inclination section be
（2）
Wherein, K is unit conversion coefficient, when curvature unit is spends/30 meters, K=30；When curvature unit is spends/100 meters, K=
100；
If Z size has exceeded the maximum deflecting ability of deflecting tool, single circular arc Hole clean can not 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 can use Dan Yuan
Arc Hole clean.
（3）If on the contrary can not use single circular arc Hole clean, using variable amplitude cycloid Track desigh, then using circle
Arc-cycloid orbits design, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh.Step is as follows：
1）Preemphasis section borehole track parameter is determined by the lower going-into-well angle range of later stage petroleum production engineering oil extraction pump.Preemphasis Duan Jing
Eye orbit parameter includes the segment length of preemphasis section circular arc, preemphasis section maximum hole angle, horizontal segment enters window hole angle；
2）Variable amplitude cycloid section borehole track data calculate：Tangent slope including cycloid section borehole track curve any point, become
Width cycloid section borehole track curve any point hole angle, variable amplitude cycloid section borehole track segment length and any variable amplitude cycloid section
Hole curvature, so as to obtain the characteristic parameter R of kickoff point (KOP) well depth and variable amplitude cycloid equation, substitute into variable amplitude cycloid section borehole track
Parametric equation so as to obtain fixed pendulum line segment well trajectory equation, 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
（3）
In formula：S is horizontal displacement, and h is vertical depth, and R is that variable amplitude cycloid moves radius of circle,To move the circle anglec of rotation,For radius variation ratio,；
2）Any variable amplitude cycloid section borehole track hole angle calculates
According to integration rule, the tangent slope at cycloid section borehole track curve any point is
（4）
Then variable amplitude cycloid section borehole track curve any point hole angleFor
（5）
When, at variable amplitude cycloid section borehole track two sections of tie points of curve：
（6）
When, at variable amplitude cycloid section borehole track two sections of tie points of curve：
（7）
3）Any variable amplitude cycloid section borehole track segment length calculates：
（8）
Variable amplitude cycloid section borehole track segment length is
（9）
4）Any variable amplitude cycloid section hole curvature calculates
Any point M hole curvature radius is：
（10）
Then the hole curvature at point M is：
（11）
5）The determination of kickoff point (KOP) well depth
According to before vertical well depth and target away from governing equation
（12）
Wherein：；
According to formula（6）、（8）, result of calculation, substitute into formula（12）, using trial and error procedure,The 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）Determine variable amplitude cycloid section well trajectory equation
According to the R obtained in 5), the parametric equation of cycloid section borehole track is calculated
（13）
Solve so as to obtain fixed pendulum line segment well trajectory equation.
Embodiment 1
Now exemplified by extending the oil eastern oil region green grass or young cropsization stone acupuncture needle flat X wells of oil field stone 7, to its drilled wellbore trajectories integral analysis.
（1）Collect the basic geological design parameter of the flat X wells of stone 7, including mouth coordinate, terrain altitude data, target spot
Before data, horizontal section length, target away from etc. data, ground elevation repetition measurement；As shown in table 1.
1 stone of table, 7 flat 2 well basic design data
（2）With step（1）In the basic design parameters that are collected into judge borehole track form
1）Assuming that 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 H depth is reasonable
H>0 but vertical depth at 65.25 meters the 4th to be loess formation, belong to top layer caving ground, it is impossible to single circular arc well rail
Road designs, using variable amplitude cycloid Track desigh.
（3）Variable amplitude cycloid Track desigh, as shown in Figure 2
1）Preemphasis section borehole track parameter determines
The segment length of preemphasis section circular arc is determined according to the lower going-into-well angle range of later stage petroleum production engineering oil extraction pumpFor 270m, preemphasis section
Maximum hole angleFor 40 °, determine that horizontal segment enters window hole angle according to basic design parametersFor 89.3 °, it is away from S before target
418.75m。
2）Variable amplitude cycloid section borehole track data calculate
By formula（4）、（5）、（6）、（7）
（15）
Relevant parameter is substituted into obtain
（16）
By formula（12）Obtain before vertical well depth and target away from governing equation
（17）
Wherein：
According to formula（16）、（17）Have in the equation group of composition、、, tri- unknown numbers of H0 and R, using trial and error procedure,From 1,
1.5th, 2 ... start tentative calculation, and full scale equation group is only left、, tetra- unknown numbers of H0 and R, whenFor 1 when, solution can obtain
Kickoff point (KOP) well depth H0 is 91.7507m, and the characteristic parameter R of variable amplitude cycloid equation is 122.4302m.To be stable at well depth 91.75m
Stratum.
According to the R obtained in 5), the parametric equation of cycloid section borehole track is calculated
（19）
Any point M hole curvature is：
（20）
Any variable amplitude cycloid section borehole track segment length：
（21）
2 stone of table, 7 flat 2 well Hole clean data
By taking flat 2 well of stone 7 as an example, two kinds of circular arc, speed change cycloid sections are made respectively, and (that following light line is change as shown in Figure 3
Fast cycloid orbits), calculated by frictional resistance software, as a result as shown in table 3.
Two kinds of section hook load contrast tables under 3 each operating mode of table
As seen from Figure 3, speed change cycloid profile Track desigh compares circular arc section Track desigh, kickoff point (KOP) vertical depth by
65.28m increases to 91.75m, designs borehole track relative smooth.Speed change cycloid profile rail is can be seen that from the analog result of table 3
Circular arc section Track desigh compare in road design, slipping drilling, is made a trip, under the operating mode such as setting of casing, hook load change less, base
This quite, can substitute circular arc section Track desigh completely.By this design each operating mode of practice of construction drilling well under actual frictional resistance with
Calculating is consistent, and setting of casing is more smooth with completion practice.
Claims (4)
- A kind of 1. two-dimentional shallow-layer horizontal well Hole clean method, it is characterised in that：Comprise the following steps：（1）Borehole track basic design parameters are determined, include the mouth coordinate O of planned well（X0, Y0）, maximum vertical depth Hmax, target It is preceding to enter window point A and finishing drilling point B coordinates away from S, horizontal segment；（2）With step（1）In the borehole track basic design parameters that are collected into judge borehole track form, it is assumed that use single circular arc Borehole track, the vertical depth H of the kickoff point (KOP) and deflecting the boring rate Z of inclination section is tried to achieve, judge that the vertical depth H places of kickoff point (KOP) are deep successively The deflecting the boring rate Z spent for good ground and inclination section meets the maximum deflecting ability of deflecting tool, i.e., using single circular arc well Track desigh；（3）If on the contrary can not use single circular arc Hole clean, using variable amplitude cycloid Track desigh, then using circular arc-pendulum Trajectory designs, i.e. straight well section-preemphasis section-variable amplitude cycloid section-horizontal segment Track desigh；Step is as follows：1）Preemphasis section borehole track parameter is determined, includes the segment length of preemphasis section circular arc, preemphasis section maximum hole angle, horizontal segment Enter window hole angle；2）Variable amplitude cycloid section borehole track data calculate：Tangent slope including cycloid section borehole track curve any point, become Width cycloid section borehole track curve any point hole angle, variable amplitude cycloid section borehole track segment length and any variable amplitude cycloid Section hole curvature, so as to obtain the characteristic parameter R of kickoff point (KOP) well depth and variable amplitude cycloid equation, substitute into variable amplitude cycloid section well rail The parametric equation in road is so as to obtaining fixed pendulum line segment well trajectory equation.
- A kind of 2. two-dimentional shallow-layer horizontal well Hole clean method according to claim 1, it is characterised in that：Described Step（2）Middle judgement borehole track form includes：1）Assuming that using 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) ForH=Hmax-S （1）2) judge whether vertical depth H is reasonableIf H<0, or H>Depth where 0 and H is caving ground, then can not use single circular arc Hole clean；3）If 2）Condition meets, then calculates the deflecting the boring rate Z of inclination sectionAssuming that horizontal segment hole angle is, then the deflecting the boring rate Z of inclination section be（2）Wherein, K is unit conversion coefficient, when curvature unit is spends/30 meters, K=30；When curvature unit is spends/100 meters, K= 100；If Z size has exceeded the maximum deflecting ability of deflecting tool, single circular arc Hole clean can not 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 can use Dan Yuan Arc Hole clean.
- A kind of 3. two-dimentional shallow-layer horizontal well Hole clean method according to claim 1, it is characterised in that：Described Variable amplitude cycloid section borehole track data calculate detailed process be：1）According to the parametric equation of variable amplitude cycloid, the parametric equation for obtaining variable amplitude cycloid section borehole track is（3）In formula：S is horizontal displacement, and h is vertical depth, and R is that variable amplitude cycloid moves radius of circle,To move the circle anglec of rotation,For radius variation ratio,；2）Any variable amplitude cycloid section borehole track hole angle calculatesAccording to integration rule, the tangent slope at cycloid section borehole track curve any point is（4）Then variable amplitude cycloid section borehole track curve any point hole angleFor（5）When, at variable amplitude cycloid section borehole track two sections of tie points of curve：（6）When, at variable amplitude cycloid section borehole track two sections of tie points of curve：（7）3）Any variable amplitude cycloid section borehole track segment length calculates：（8）Variable amplitude cycloid section borehole track segment length is（9）4）Any variable amplitude cycloid section hole curvature calculatesAny point M hole curvature radius is：（10）Then the hole curvature at point M is：（11）5）The determination of kickoff point (KOP) well depthAccording to before vertical well depth and target away from governing equation（12）Wherein：；According to formula（6）、（8）, result of calculation, substitute into formula（12）, using trial and error procedure,The 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）Determine variable amplitude cycloid section well trajectory equationAccording to the R obtained in 5), the parametric equation of cycloid section borehole track is calculated（13）Solve so as to obtain fixed pendulum line segment well trajectory equation.
- A kind of 4. two-dimentional shallow-layer horizontal well Hole clean method according to claim 1, it is characterised in that：Described Determining preemphasis section borehole track parameter is determined according to the lower going-into-well angle range of later stage petroleum production engineering oil extraction pump.
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| CN108153941A (en) * | 2017-12-07 | 2018-06-12 | 陕西延长石油(集团)有限责任公司研究院 | A kind of engineering method for solving of variable curvature Hole clean |
| 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 |
| CN111324963A (en) * | 2020-03-02 | 2020-06-23 | 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 |
| CN111472756A (en) * | 2020-05-28 | 2020-07-31 | 中国石油天然气集团有限公司 | Method for calculating safe well deviation angle of horizontal well deviation making section |
| CN115142837A (en) * | 2022-07-08 | 2022-10-04 | 陕西延长石油（集团）有限责任公司 | Track design method for horizontal well vector window entry |
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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 |
| CN111324963A (en) * | 2020-03-02 | 2020-06-23 | 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 |
| CN111472756A (en) * | 2020-05-28 | 2020-07-31 | 中国石油天然气集团有限公司 | Method for calculating safe well deviation angle of horizontal well deviation making section |
| CN115142837A (en) * | 2022-07-08 | 2022-10-04 | 陕西延长石油（集团）有限责任公司 | Track design method for horizontal well vector window entry |
| CN115142837B (en) * | 2022-07-08 | 2024-05-14 | 陕西延长石油（集团）有限责任公司 | Track design method for horizontal well vector windowing |
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