CN105781417A - Method and device for obtaining entrance window angle of horizontal well - Google Patents
Method and device for obtaining entrance window angle of horizontal well Download PDFInfo
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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
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Abstract
The invention provides a method and device for obtaining an entrance window angle of a horizontal well. The method includes the steps of obtaining the vertical thickness h of a target layer of the horizontal well, the inclination angle alpha of a stratum, and the horizontal displacement L of the target layer, determining the standard entrance window hole drift angle beta according to the vertical thickness h, the inclination angle alpha of the stratum, and the horizontal placement L of the target layer, calculating the adjustment angle theta of the entrance window hole drift angle, and determining the actual entrance window hole drift angle eta according to the standard entrance window hole drift angle beta and the adjustment angle theta. Thus, the optimal entrance window hole drift angle of the horizontal well is calculated accurately, the horizontal well enters a window smoothly and is drilled into an oil layer smoothly, the angle is adjusted in the target layer conveniently, and the horizontal well can be drilled into more oil layers.
Description
Technical field
The invention belongs to oil-gas field development technical field, particularly relate to a kind of horizontal well and enter acquisition methods and the device of window angle.
Background technology
In drilling process, horizontal well in implementation process for guaranteeing accurately to enter window, the hole deviation angle that optimum level well creeps into is needed according to stratum practical situation, particularly vicinity enters window point and extremely important in the selection of net horizontal section hole angle, hole deviation angle is crept into less than best angle, drill bit quickly penetrates target zone, and hole deviation angle is crept into more than best angle after likely cannot entering window or entering window and quickly passed from top, stratum.
Enter in window hole deviation angle design process at horizontal well, traditional method is that engineers and technicians are designed according to horizontal well drilling purpose, only considered difficulty of construction, it does not have consider the contingent change of the target zone degree of depth, if it occur that change, wellbore trace adjustment difficulty is bigger.
Based on this, need a kind of horizontal well at present badly and enter the defining method of window angle, enter the low success rate of technical problem of window solving horizontal well in prior art.
Summary of the invention
For prior art Problems existing, embodiments provide a kind of horizontal well and enter acquisition methods and the device of window angle, be used for solving horizontal well in prior art and enter the low success rate of technical problem of window.
The present invention provides a kind of horizontal well to enter the defining method of window angle, and described method includes:
Obtain the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；
Horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone determines that standard enters window hole angle β；
The adjustment angle, θ of window hole angle is entered described in calculating；
Enter window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality.
In such scheme, described standard enters window hole angle β and described vertical thickness h and described stratigraphic dip α inverse correlation；Horizontal displacement L positive correlation with described target zone.
In such scheme, the described horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone determines that standard enters window hole angle β and includes:
According to formulaCalculate described standard and enter window hole angle β.
In such scheme, described in enter the adjustment gradient adjusting angle, θ and described vertical thickness h and every drilling rod of window hole anglePositive correlation.
In such scheme, the adjustment angle, θ entering window hole angle described in described calculating includes:
According to formulaThe adjustment angle, θ of window hole angle is entered described in calculating；Wherein, described inFor the length that the adjustment gradient of every drilling rod, described R are described drilling rod.
In such scheme, described enter window hole angle β according to described standard and described adjustment angle, θ determines that entering window hole angle η described in reality includes:
Calculate according to formula η=β-θ and enter window hole angle η described in described reality.
In such scheme, the adjustment gradient of described drilling rodIt is not more than 2.3 °.
The present invention also provides for a kind of horizontal well and enters the acquisition device of window angle, and described device includes:
Acquisition module, for obtaining the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；
First determines module, determines that standard enters window hole angle β for the horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone；
Computing module, is used for entering described in calculating the adjustment angle, θ of window hole angle；
Second determines module, for entering window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality.
In such scheme, described first determines according to the horizontal displacement L of described vertical thickness h, stratigraphic dip α and described target zone, module determines that standard enters window hole angle β and specifically includes: described first determines that module is according to formulaCalculate described standard and enter window hole angle β.
In such scheme, the adjustment angle, θ entering window hole angle described in the calculating of described computing module includes:
Described computing module is according to formulaThe adjustment angle, θ of window hole angle is entered described in calculating；Wherein, described inFor the length that the adjustment gradient of every drilling rod, described R are described drilling rod.
The invention provides a kind of horizontal well and enter acquisition methods and the device of window angle, described method includes: obtain the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；Horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone determines that standard enters window hole angle β；The adjustment angle, θ of window hole angle is entered described in calculating；Enter window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality；So, accurate calculated level well the best enters window hole deviation angle, makes horizontal well enter window smoothly, and horizontal well pierces oil reservoir smoothly, and is easy in target zone to adjust angle, bore and meet more multiple zone.
Accompanying drawing explanation
Fig. 1 enters the acquisition methods schematic flow sheet of window angle for the horizontal well that the embodiment of the present invention one provides；
Fig. 2 enters window angle theory locus schematic diagram for the horizontal well that the embodiment of the present invention one provides；
Fig. 3 enters window angle optimum trajectory schematic diagram for the horizontal well that the embodiment of the present invention one provides；
Fig. 4 enters the acquisition device structural representation of window angle for the horizontal well that the embodiment of the present invention two provides.
Detailed description of the invention
In order to well of improving the standard enters window success rate, pierce oil reservoir smoothly, the invention provides a kind of horizontal well and enter acquisition methods and the device of window angle, described method includes: obtain the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；Horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone determines that standard enters window hole angle β；The adjustment angle, θ of window hole angle is entered described in calculating；Enter window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality.
Below by drawings and the specific embodiments, technical scheme is described in further detail.
Embodiment one
The present embodiment provides a kind of horizontal well to enter the acquisition methods of window angle, as it is shown in figure 1, described method includes following step:
Step 110, obtains the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone.
In this step, the horizontal displacement L of the vertical thickness h of described target zone, stratigraphic dip α and described target zone can pass through offset well data acquisition.Described horizontal displacement L can determine according to practical situation.
According to the horizontal displacement L of described vertical thickness h, stratigraphic dip α and described target zone, step 111, determines that standard enters window hole angle β.
In this step, after getting the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone, assume that drilling rod enters angle holding drilling after window, as shown in Figure 2, drilling rod just passes after being drilled bottom oil reservoir, at this moment can calculate described standard according to formula (1) and enter window hole angle β.
Wherein, described standard enters window hole angle β and described vertical thickness h and described stratigraphic dip α inverse correlation, and namely when described vertical thickness h and described stratigraphic dip α increases, described standard enters window hole angle β and reduces；When described vertical thickness h and described stratigraphic dip α reduces, described standard enters window hole angle β and increases；With the horizontal displacement L positive correlation of described target zone, namely when the horizontal displacement L of described target zone increases, described standard enters window hole angle β and increases；When the horizontal displacement L of described target zone reduces, described standard enters window hole angle β and reduces.
Step 112, enters the adjustment angle, θ of window hole angle described in calculating.
In this step, according to formula (2) calculating, enter the adjustment angle, θ of window hole angle；Wherein, described inIt is the length of every drilling rod for the every adjustable gradient of drilling rod, described R.
Wherein, the adjustment gradient adjusting angle, θ and described vertical thickness h and every drilling rod of window hole angle is entered described inPositive correlation.Namely when the adjustment gradient of described vertical thickness h and every drilling rodDuring increase, described in enter the adjustment angle, θ of window hole angle and also increase；Adjustment gradient when described vertical thickness h and every drilling rodDuring reduction, described in enter the adjustment angle, θ of window hole angle and also reduce.
When described standard enters window hole angle β and enters after the adjustment angle, θ of window hole angle calculates, enter, according to the best, two conditions that window hole deviation angle should meet and design optimal well track.Described optimal well track is as shown in Figure 3.Wherein, first condition is: can enter window smoothly, and after entering window, track can be adjusted to parallel with target zone as early as possible；Being if actual target zone is deeper than design during second condition, it is possible to enter window as early as possible, if actual target zone is more shallow than design, well track furnishing as early as possible is parallel with target zone.
Here can pass through to adjustMeet first condition, when describedDuring increase, θ also increases, it is possible to meet actual target zone deeper than design, it is possible to enter the demand of window as early as possible；Also can realize well track furnishing as early as possible parallel with target zone, meet oil reservoir more shallow than design, do not go out the requirement of layer.
Step 113, enters window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality.
In this step, calculate according to formula (3) and described in described reality, enter window hole angle η；
η=β-θ (3).
Here, the every adjustable gradient of drilling rodAs far as possible big, if subjected to the restriction of drilling and well completion,Cannot constructing too greatly, maximum needs engineering staff to determine.Wherein, the adjustment gradient of described drilling rodBeing not more than 2.3 °, optimum is 1.5 °.
The horizontal well that the present embodiment provides enters the acquisition methods of window angle, solve horizontal well path and optimize difficult problem, the best can be calculated in advance and enter window hole angle, adjust best wellbore trace in time, implement smoothly to lay a solid foundation for horizontal well when running into target zone change in depth.
Embodiment two
Corresponding to embodiment one, the present embodiment also provides for a kind of horizontal well and enters the acquisition device of window angle, and as shown in Figure 4, described device includes: acquisition module 41, first determine that module 42, computing module 43 and second determine module 44；Wherein,
Described acquisition module 41 is for obtaining the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；Specifically, the horizontal displacement L of the vertical thickness h of described target zone, stratigraphic dip α and described target zone can pass through offset well data acquisition.Described horizontal displacement L can determine according to practical situation.
After described acquisition module 41 gets the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone, described first determines that module 42 calculates described standard according to formula (1) and enters window hole angle β.
Wherein, described standard enters window hole angle β and described vertical thickness h and described stratigraphic dip α inverse correlation, and namely when described vertical thickness h and described stratigraphic dip α increases, described standard enters window hole angle β and reduces；When described vertical thickness h and described stratigraphic dip α reduces, described standard enters window hole angle β and increases；With the horizontal displacement L positive correlation of described target zone, namely when the horizontal displacement L of described target zone increases, described standard enters window hole angle β and increases；When the horizontal displacement L of described target zone reduces, described standard enters window hole angle β and reduces.
Specifically, it is assumed that drilling rod enters angle holding drilling after window, as in figure 2 it is shown, drilling rod just passes after being drilled bottom oil reservoir, at this moment described first determines that module 42 calculates described standard according to formula (1) and enters window hole angle β.
When described first determines that module 42 calculates after described standard enters window hole angle β according to formula (1), described computing module 43 is used for, according to formula (2) calculate described in enter the adjustment angle, θ of window hole angle；Wherein, described inIt is the length of every drilling rod for the every adjustable gradient of drilling rod, described R.
Wherein, the adjustment gradient adjusting angle, θ and described vertical thickness h and every drilling rod of window hole angle is entered described inPositive correlation.Namely when the adjustment gradient of described vertical thickness h and every drilling rodDuring increase, described in enter the adjustment angle, θ of window hole angle and also increase；Adjustment gradient when described vertical thickness h and every drilling rodDuring reduction, described in enter the adjustment angle, θ of window hole angle and also reduce.
Here, when described standard enters window hole angle β and enters after the adjustment angle, θ of window hole angle calculates, described computing module 43 enters, according to the best, two conditions that window hole deviation angle should meet and designs optimal well track.Shown in solid in described optimal well track such as Fig. 3, theory locus is as shown by the dotted line in fig. 3.Wherein, first condition is: can enter window smoothly, and after entering window, track can be adjusted to parallel with target zone as early as possible；Being if actual target zone is deeper than design during second condition, it is possible to enter window as early as possible, if actual target zone is more shallow than design, well track furnishing as early as possible is parallel with target zone.
Computing module 43 described here can pass through to adjustMeet first condition, when describedDuring increase, θ also increases, it is possible to meet actual target zone deeper than design, it is possible to enter the demand of window as early as possible；Also can realize well track furnishing as early as possible parallel with target zone, meet oil reservoir more shallow than design, do not go out the requirement of layer.
When described standard enter window hole angle β and described in enter after the adjustment angle, θ of window hole angle determines, described second determines that module 44 calculates according to formula (3) enters window hole angle η described in described reality；
η=β-θ (3).
Here, the every adjustable gradient of drilling rodAs far as possible big, if subjected to the restriction of drilling and well completion,Cannot constructing too greatly, maximum needs engineering staff to determine.Wherein, the adjustment gradient of described drilling rodBeing not more than 2.3 °, optimum is 1.5 °.
During practical application, described acquisition module 41, first determine module 42, computing module 43 and second determine module 44 can by this device central processing unit (CPU, CentralProcessingUnit), digital signal processor (DSP, DigtalSignalProcessor), programmable logic array (FPGA, FieldProgrammableGateArray), micro-control unit (MCU, MicroControllerUnit) realizes.
Embodiment three
In practical application, for the horizontal well in certain oil field, when utilizing method that embodiment one provides and the device that embodiment two provides to carry out drilling well, it is embodied as follows:
The vertical thick h of this well purpose of design layer is 7.8m, and stratigraphic dip α is 5.2 °, and design level well horizontal displacement L in target zone is 350m.
The method for designing of window hole deviation angle is entered according to horizontal well the best:
First the horizontal displacement L obtaining the vertical thickness h of described horizontal well target zone to be 7.8m, stratigraphic dip α be 5.2 ° and described target zone is 350m.
Secondly, according to formula (1), it is 83.7 ° that the theory of computation enters window hole angle β.
Finally, the every adjustable maximum slope of drilling rod is collected at situ of drilling wellBeing 1.5 °, the length R of every drilling rod is 9.6m, according to formula (2) calculate θ be 4.5 °, thus obtain the best enter window hole angle η for (β-θ) be 79.2 °.
Bore the deep 5.3m of situation target zone depth ratio design according to real, if the window hole angle that enters conventionally designed is 83.6 ° and creeps into, cause late enter window, waste drilling depth 103m, bore and meet less oil reservoir.
The best that the method provided according to embodiment one calculates enters window hole angle and creeps into, and it is smooth that this well enters window, and well logging oil/gas show is better, adjusts in time after entering window, and net horizontal section has deepened 130m, bores and meets oil reservoir 343.3m, and after operation, stable yield is at about 30t.
Embodiment four:
In practical application, for another horizontal well in certain oil field, when utilizing method that embodiment one provides and the device that embodiment two provides to carry out drilling well, it is embodied as follows:
The vertical thick h of this well purpose of design layer is 5.3m, and stratigraphic dip α is 6.5 °, and design level well horizontal displacement L in target zone is 230m.
The method for designing of window hole deviation angle is entered according to horizontal well the best:
First, the vertical thick h obtaining purpose of design layer is 5.3m, and stratigraphic dip α is 6.5 °, and design level well horizontal displacement L in target zone is 230m.
Secondly, entering window hole angle β according to formula (1) theory of computation is 82.2 °.
Last: to collect the every adjustable maximum slope of drilling rod at situ of drilling wellBeing 1.5 °, the length R of every drilling rod is 9.8m, according to formula (2) calculate θ be 3.5 °, thus obtain the best enter window hole angle η for (β-θ) be 78.7 °.
Bore the shallow 7m of situation target zone depth ratio design according to real, if the window hole angle that enters conventionally designed is 70 ° and creeps into, being likely to drill target zone not in time if adjusted, boring and meeting less oil reservoir.
The best that the method provided according to embodiment one calculates enters window hole angle and creeps into, and it is smooth that this well enters window, and well logging oil/gas show is better, adjusts in time, bore and meet oil reservoir 247.5m after entering window, and after operation, stable yield is at about 12t.
The above, be only presently preferred embodiments of the present invention, is not intended to limit protection scope of the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (10)
1. a horizontal well enters the acquisition methods of window angle, it is characterised in that described method includes:
Obtain the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；
Horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone determines that standard enters window hole angle β；
The adjustment angle, θ of window hole angle is entered described in calculating；
Enter window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality.
2. the method for claim 1, it is characterised in that described standard enters window hole angle β and described vertical thickness h and described stratigraphic dip α inverse correlation；Horizontal displacement L positive correlation with described target zone.
3. the method for claim 1, it is characterised in that the described horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone determines that standard enters window hole angle β and includes:
According to formulaCalculate described standard and enter window hole angle β.
4. the method for claim 1, it is characterised in that described in enter the adjustment gradient adjusting angle, θ and described vertical thickness h and every drilling rod of window hole anglePositive correlation.
5. the method for claim 1, it is characterised in that the adjustment angle, θ entering window hole angle described in described calculating includes:
According to formulaThe adjustment angle, θ of window hole angle is entered described in calculating；Wherein, described inFor the length that the adjustment gradient of every drilling rod, described R are described drilling rod.
6. the method for claim 1, it is characterised in that described enter window hole angle β according to described standard and described adjustment angle, θ determines that entering window hole angle η described in reality includes:
Calculate according to formula η=β-θ and enter window hole angle η described in described reality.
7. method as claimed in claim 3, it is characterised in that the adjustment gradient of described drilling rodIt is not more than 2.3 °.
8. a horizontal well enters the acquisition device of window angle, it is characterised in that described device includes:
Acquisition module, for obtaining the horizontal displacement L of the vertical thickness h of described horizontal well target zone, stratigraphic dip α and described target zone；
First determines module, determines that standard enters window hole angle β for the horizontal displacement L according to described vertical thickness h, stratigraphic dip α and described target zone；
Computing module, is used for entering described in calculating the adjustment angle, θ of window hole angle；
Second determines module, for entering window hole angle β according to described standard and described adjustment angle, θ is determined and entered window hole angle η described in reality.
9. device as claimed in claim 8, it is characterised in that described first determines according to the horizontal displacement L of described vertical thickness h, stratigraphic dip α and described target zone, module determines that standard enters window hole angle β and specifically includes: described first determines that module is according to formulaCalculate described standard and enter window hole angle β.
10. device as claimed in claim 8, it is characterised in that the adjustment angle, θ entering window hole angle described in the calculating of described computing module includes:
Described computing module is according to formulaThe adjustment angle, θ of window hole angle is entered described in calculating；Wherein, described inFor the length that the adjustment gradient of every drilling rod, described R are described drilling rod.
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| CN109899054A (en) * | 2019-02-22 | 2019-06-18 | 中国石油天然气股份有限公司大港油田分公司 | Wellbore trace determines method and V-type well |
| CN110821403A (en) * | 2019-10-25 | 2020-02-21 | 中国石油天然气股份有限公司大港油田分公司 | Drilling trajectory control method and device and storage medium |
| 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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| CN106869792A (en) * | 2017-04-14 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Coal bed gas horizontal well horizontal segment goes out the method that selection chases after layer or sidetracking after layer |
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| 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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| CN105781417B (en) | 2018-11-16 |
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