CN100549358C - A kind of fish bone type branch well drilling and completing method - Google Patents
A kind of fish bone type branch well drilling and completing method Download PDFInfo
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- CN100549358C CN100549358C CNB2006100467052A CN200610046705A CN100549358C CN 100549358 C CN100549358 C CN 100549358C CN B2006100467052 A CNB2006100467052 A CN B2006100467052A CN 200610046705 A CN200610046705 A CN 200610046705A CN 100549358 C CN100549358 C CN 100549358C
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Abstract
The present invention relates to a kind of fish bone type branch well drilling and completing method, belong to sidetrack horizontal well boring method class.Because the fishbone Multilateral Wells can improve the oil well well yield, at present after main borehole has been bored in employing, in the main borehole sleeve pipe, be lowered to wedge deflection tool window sidetracking branch well hole again, can reduce the main borehole latus rectum like this makes the seat of wedge deflection tool hang difficulty, the present invention adopts when boring main borehole chance oil reservoir for this reason, at first pierce first branch well hole, after treating finishing drilling, first branch's completion tubular column is for oil down, when main borehole gets into second branch location, carrying out second branch well hole again creeps into, again main borehole is crept into and is lowered to completion casing up to finishing whole branch well holes, this method can not reduce the main borehole size and Multilateral Wells can be measure-alike with main borehole, the Multilateral Wells quantity of boring not limited, can effectively increase single port oil well oil reservoir bare area and improve crude output, this method construction simply can be widely used in the branch hole drilling of sidetrack horizontal well.
Description
Technical field:
The present invention relates to a kind of fish bone type branch well drilling and completing method, belong to the method class of boring sidetrack horizontal well.
Background technology:
The oil field is after entering exploitation, for improving oil well output, enlarge the oil reservoir bare area, the single well productivity of maximum performance oil well, generally adopted the drilling completion method of directed horizontal well drilling of sidetracking and Multilateral Wells since early eighties, in sidetrack horizontal well particularly the fishbone Multilateral Wells with its higher oil well well yield, lower at the oil extraction cost, this technology has become the frontier technology of world's exploitation technology, the boring method that existing technology mainly adopts carries out window sidetracking and goes out a minute well by be lowered to wedge deflection tool in the main borehole sleeve pipe more often after boring the completion eye.So not only can reduce the latus rectum of little main borehole in construction, also can bring difficulty to construction, in addition because main borehole is a horizontal well, oblique seat is also very difficult when hanging leading, so during this method operation, is very limited.
Summary of the invention:
Purpose of the present invention is in order to overcome above-mentioned shortcoming, and a kind of fish bone type branch well drilling and completing method that provides, use this method that the main borehole size of sidetrack horizontal well is not reduced because of branch well hole, also can make branch well hole quantity to be bored in the net horizontal section unrestricted, and can increase the oil reservoir bare area to greatest extent.
Implementation of the present invention is such.
For the present invention that achieves the above object is entered in the main borehole of net horizontal section by the peupendicular hole section in the pit shaft that carries out the horizontal side drilling well, when boring the chance oil reservoir, need not to pierce the shaft bottom always, and when being to use single helicoid hydraulic motor to be drilled into the position of first branch well hole, directly carry out orientation and bore first branch well hole, after the first branch well hole finishing drilling, pull out of hole, and in first Multilateral Wells, be lowered to completion tubular column or carry out barefoot completion, then for oil, after treating that above-mentioned operation finishes, continue in sidetrack horizontal well, to pierce main borehole again, when piercing the second branch well hole place, repeat to bore the first branch well hole step, finish second branch well hole and creep into, the rest may be inferred, intact up to whole brills, at least be not less than the 3rd branch well hole of two branch well holes, the branch that creeps into of the 4th branch well hole ends, and then finishes the creeping into of whole main borehole, and is lowered to the completion casing tubing string again by pulling out of hole in main borehole and gets final product.
This method is suitable in the net horizontal section of horizontal side drilling well, is not less than the above completion of two branch well holes at least.In addition, when boring the fishbone branch well hole, also can use removable casing sidetracking guiding device to carry out the Multilateral Wells completion.
The present invention compared with prior art has distinguishing feature:
Carrying out fishbone Multilateral Wells completion when piercing owing to use method of the present invention, only need in main borehole, to carry out successively first Multilateral Wells creep into completion sequence after, continue and to carry out the drilling well and the completion of the second C grade Multilateral Wells continuously, like this, can avoid after having bored main borehole, being lowered to again the work that wedge deflection tool carries out the window sidetracking branch well hole, that brings is loaded down with trivial details, two have avoided can causing the main borehole latus rectum to diminish to influence the drawback of creeping into because of being lowered to more drilling tool, this method is in the construction of carrying out the Multilateral Wells sidetrack horizontal well, the main borehole size can not reduce because of branch well hole, the branch well hole size can be measure-alike with main borehole, also can be different, convenient construction, the branch well hole quantity of being bored in addition can be not too small and restricted because of horizontal hole diameter, in main borehole, therefore can increase the oil reservoir bare area to greatest extent, help utilizing the fishbone Multilateral Wells to carry out cold adopting and thermal recovery.
Description of drawings:
Accompanying drawing is the present invention's schematic diagram of constructing.
Among the figure by 1, main borehole, 2, first branch well hole, 3, second branch well hole, the 4, the 3rd branch well hole, the 5, the 4th branch well hole, 6, protective casing, 7, tail pipe hangs, 8, sidetrack horizontal well forms.
The specific embodiment:
The present invention is provided by following examples, is illustrated below in conjunction with accompanying drawing.
Embodiment 1:
Utilize the present invention in the process of carrying out the horizontal side drilling well, to enter the main borehole 1 of net horizontal section when boring the chance oil reservoir by the peupendicular hole section in the pit shaft, need not to pierce the shaft bottom always, and be to use single bended screwdrill of being connected the drilling rod top (figure draws), when getting into the position of first branch well hole 2, directly carry out orientation and bore first branch well hole 2, after the first branch well hole finishing drilling, pull out of hole, and be lowered to first branch's completion tubular column or direct barefoot completion, replace out drilling fluid then, after treating that above-mentioned operation finishes, because the branch well hole completion tubular column is to lose in branch well hole, thereby can not influence main borehole and continue drilling well, still can proceed creeping into of main borehole 1 again, when being drilled into second branch well hole, 3 positions, repeat to bore the first branch well hole step, just can finish second branch well hole 3 creeps into, the rest may be inferred, up to finishing the 3rd branch well hole 4 that is not less than two branch well holes at least, creeping into of the 4th branch well hole 5, then, continue to finish again the work of creeping into of whole main boreholes 1, pull out of hole at last, and in main borehole 1, be lowered to the completion casing tubing string, because the present invention's main borehole when carrying out drilling well is not lowered to wedge deflection tool, kept well that enough big latus rectum is arranged, also overcome in addition at following wedge deflection tool and bored under the Multilateral Wells situation,, caused the drawback of drilling well failure because the seat extension is difficult, therefore, use this method when boring many branch well holes, not exist hole diameter to reduce, make piercing of Multilateral Wells and be subjected to restricted number, thereby can increase individual well oil reservoir bare area to greatest extent, the incremental oil production in favourable later stage.
Embodiment 2:
The single bended screwdrill of the employing of setting forth in embodiment 1 carries out the fishbone branch hole drilling, and the present invention also can use removable casing sidetracking steering tool to carry out branch's drilling well when boring the fishbone Multilateral Wells.It is the shortcoming that the formula of can not dragging for exists that this method has overcome the casing sidetracking guiding device that uses in present oil field.In the existing technology because when boring the above well of Multilateral Wells second branch, main borehole need keep certain latus rectum, the whipstock that often needs to window takes out in well, be lowered to the completion guider again, so just need to pull out of hole, very inconvenience, completion period can be prolonged again, and removable casing sidetracking guiding device is double-deck removable structure, be used for the Multilateral Wells window sidetracking as whipstock after, interior pipe can be pulled out, and overcoat can be as the usefulness of completion tubular column guiding, and this device work progress can be saved the trip time one time, and applied for utility model patent.
Claims (3)
1, a kind of fish bone type branch well drilling and completing method, it is characterized in that: in the pit shaft that carries out the horizontal side drilling well, enter the main borehole (1) of net horizontal section by the peupendicular hole section, when boring the chance oil reservoir, need not to pierce the shaft bottom always, and when being to use single helicoid hydraulic motor to be drilled into the position of first branch well hole (2), directly carry out orientation and bore first branch well hole (2), after the first branch well hole finishing drilling, pull out of hole, and in first Multilateral Wells, be lowered to completion tubular column or carry out barefoot completion, then for oil, treat that above-mentioned operation finishes after, continue in sidetrack horizontal well, to pierce main borehole (1) again, entering into second branch well hole (3) when locating, repeat to bore the first branch well hole step, just can finish second branch well hole and creep into, the rest may be inferred, up to all finishing the 3rd branch well hole (4) that is not less than two branch well holes at least, till the creeping into of the 4th branch well hole (5), and then finish, work to be drilled in being lowered to the completion casing tubing string in the main borehole at last the creeping into of whole main borehole (1).
2, a kind of fish bone type branch well drilling and completing method according to claim 1 is characterized in that: this method is suitable for being not less than at least two drilling completions more than the branch well hole in the net horizontal section of horizontal side drilling well.
3, a kind of fish bone type branch well drilling and completing method according to claim 1 is characterized in that: also can use removable casing sidetracking guiding device to carry out the completion of Multilateral Wells when boring the fishbone Multilateral Wells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100467052A CN100549358C (en) | 2006-05-23 | 2006-05-23 | A kind of fish bone type branch well drilling and completing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100467052A CN100549358C (en) | 2006-05-23 | 2006-05-23 | A kind of fish bone type branch well drilling and completing method |
Publications (2)
| Publication Number | Publication Date |
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| CN1884786A CN1884786A (en) | 2006-12-27 |
| CN100549358C true CN100549358C (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100467052A Expired - Fee Related CN100549358C (en) | 2006-05-23 | 2006-05-23 | A kind of fish bone type branch well drilling and completing method |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397888B (en) * | 2008-11-03 | 2011-12-14 | 中国石油集团长城钻探工程有限公司 | Fishbone-shaped branch well drilling and completion process |
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| CN101818620B (en) * | 2010-04-26 | 2013-04-10 | 徐萍 | Mining method for maximum reservoir contact well |
| CN101994503A (en) * | 2010-09-17 | 2011-03-30 | 北京奥瑞安能源技术开发有限公司 | Production increasing method of coalbed gas |
| CN101975048B (en) * | 2010-10-19 | 2013-12-25 | 陕西龙门天地油气技术有限公司 | Construction process of multi-branch underground screen pipe |
| CN102182403B (en) * | 2011-04-28 | 2016-06-29 | 王萍萍 | Drilling type well completion technology for fishbone branch borehole |
| CN104533287B (en) * | 2014-11-20 | 2017-03-08 | 西南石油大学 | A kind of fish spicule shape multilevel branch horizontal well shale gas reservoir that bores is drilled well and stimulation system |
| CN104533288B (en) * | 2014-11-20 | 2017-03-08 | 西南石油大学 | A kind of fish spicule shape multilevel branch horizontal well shale gas reservoir that bores is drilled the method that well is with increasing production |
| CA2943638C (en) * | 2014-11-20 | 2018-05-22 | Southwest Petroleum University | Production enhancement system using robot drill for drilling multi-branched fishbone and radial microholes in shale gas reservoir, and method thereof |
| CN106761624A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | The method for improving heavy crude reservoir edge reserves exploitation rate |
| CN106014351B (en) * | 2016-02-17 | 2018-12-25 | 中国石油集团渤海钻探工程有限公司 | A method of the accurate quickly decentralization screen casing in horizontal multiple-limb wellbore |
| CN107461186B (en) * | 2016-06-02 | 2020-02-18 | 中国石油化工股份有限公司 | Branch well reservoir transformation device and transformation method |
| CN109723377B (en) * | 2019-01-15 | 2020-08-11 | 陕西延长石油(集团)有限责任公司研究院 | Open hole well completion reservoir integrated transformation method for window-opening side drilling |
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2006
- 2006-05-23 CN CNB2006100467052A patent/CN100549358C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 岚M1－1煤层气多分支水平井充气钻井技术. 龚志敏等.石油钻采工艺，第28卷第1期. 2006 |
| 岚M1－1煤层气多分支水平井充气钻井技术. 龚志敏等.石油钻采工艺，第28卷第1期. 2006 * |
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| CN1884786A (en) | 2006-12-27 |
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