CN109236249A - Bi-lateral horizontal well changes shaft bottom production method - Google Patents
Bi-lateral horizontal well changes shaft bottom production method Download PDFInfo
- Publication number
- CN109236249A CN109236249A CN201811306663.0A CN201811306663A CN109236249A CN 109236249 A CN109236249 A CN 109236249A CN 201811306663 A CN201811306663 A CN 201811306663A CN 109236249 A CN109236249 A CN 109236249A
- Authority
- CN
- China
- Prior art keywords
- pumping pipe
- pipe string
- lateral horizontal
- tight point
- horizontal well
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Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
Abstract
The present invention provides a kind of bi-lateral horizontal wells to change shaft bottom production method, including step 10, the position to be opened a window according to the first tight point of structure determination of bi-lateral horizontal well, the second tight point, the 4th tight point and branch well hole；Step 20, the lower end that racecourse bend is mounted on to pumping pipe string simultaneously transfer pumping pipe string to when set distance, the lowering velocity of pumping pipe string is controlled above the first tight point, and pumping pipe string is made to pass through the first tight point；Step 30 rotates at branch well hole windowing position and continues to transfer pumping pipe string, judges whether pumping pipe string enters branch well hole；Step 40, when pumping pipe string be hampered position it is identical as the second tight point position when, pumping pipe string enters main borehole, above mention at this time pumping pipe string to branch well hole windowing position above and repeat step 30；When pumping pipe string be hampered position it is identical as the 4th tight point position when, pumping pipe string enters branch well hole, at this time tripping in rod string carry out operation.
Description
Technical field
The present invention relates to technical field of oil production engineering, and in particular to a kind of bi-lateral horizontal well changes shaft bottom production method.
Background technique
With deepening continuously for oil field development, exploitation New Technologies stable yields oily for oil field increasing plays most important
Effect.Bi-lateral horizontal well is to improve a new technology of Oil & Gas Productivity by increasing the drainage area of oil-gas reservoir, is
21 century is drilled one of the important technical in well field.
However, stratum energy itself constantly consumes with the continuous exploitation of oil well, corresponding water injection well connection is poor, causes
Constantly deepen in bi-lateral horizontal well hydrodynamic face.Part bi-lateral horizontal well hydrodynamic face drop to top set's wellbore windowing hereinafter,
And produced in oil well pump tripping in main borehole, so that top set's wellbore fails effectively to employ, cause the oil well low yield underproduction.Therefore, exist
In bi-lateral horizontal well production process, need periodically to change shaft bottom production, to improve the recovery ratio of oil well.Judge which oil well pump enters
One branch is the key that change shaft bottom production technology.
Summary of the invention
The present invention provides a kind of bi-lateral horizontal wells to change shaft bottom production method, is referred to the accurate tripping in of flow string with realizing
Determine the purpose of branch well hole production.
The technical solution adopted by the present invention to solve the technical problems is: a kind of bi-lateral horizontal well changes shaft bottom producer
Method, comprising the following steps: step 10 is met according to the first tight point of structure determination of bi-lateral horizontal well, the second tight point, the 4th
The position of resistance point and branch well hole windowing；Step 20, the lower end that racecourse bend is mounted on to pumping pipe string and will be under pumping pipe string
It puts to when set distance, the lowering velocity of pumping pipe string is controlled above the first tight point, pumping pipe string is made to pass through the first tight point；
Step 30 rotates at branch well hole windowing position and continues to transfer pumping pipe string, according to the position of the second tight point and the 4th
The position of tight point judges whether pumping pipe string enters branch well hole；Step 40, when the pumping pipe string position that is hampered is hampered with second
When point position is identical, pumping pipe string enters main borehole, above mentions above pumping pipe string to branch well hole windowing position and repeats at this time
Step 30；When pumping pipe string be hampered position it is identical as the 4th tight point position when, pumping pipe string enters branch well hole, at this time tripping in
Rod string carries out operation.
Further, step 20 includes step 21: racecourse bend being mounted on the lower end of pumping pipe string and by pumping pipe string
Decentralization to 10m to 15m above the first tight point apart from when, the lowering velocity of pumping pipe string is controlled in 3m/min to 5m/min.
Further, step 20 further include: step 22 raises and decentralizes pumping pipe string repeatedly, according to the load of weight indicator
Read the physical location for determining the first tight point；Step 23, when weight indicator load reading decline setting numerical value when, rotate and delay
Slow decentralization pumping pipe string；Step 24, when weight indicator load read continue to decline when, above mention pumping pipe string and repeat step 23；
When the load of weight indicator reading restores to tubing string initial load to read, then continue slowly decentralization pumping pipe string.
Further, in step 23, when 1 ton of the load reading decline of weight indicator is to 2 ton hours, rotation is simultaneously slowly transferred and is pumped
Tubing string.
Further, step 10 further includes production racecourse bend: the lower end of an oil pipe is fixedly connected with a silk plug, and
The middle part setting position of oil pipe bends oil pipe, and the bending length of oil pipe is greater than the casing inner diameter of bi-lateral horizontal well.
Further, the bending length of oil pipe is greater than the casing inner diameter 100mm to 150mm of bi-lateral horizontal well.
Further, lower end distance of the middle part setting position of oil pipe apart from oil pipe is 4m to 4.5m.
Further, step 10 further includes adding armored pump cylinder pillar outside the pump barrel of pumping pipe string.
Fail effectively to move the invention has the advantages that the embodiment of the present invention solves bi-lateral horizontal well top set wellbore
With the problem of, realize the demand of flow string accurate tripping in assigned finger wellbore production, make two points of bi-lateral horizontal well
Branch wellbore is utilized effectively, and improves the recovery ratio of oil well.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of bi-lateral horizontal well in the embodiment of the present invention.
Appended drawing reference in figure: 1, the first tight point；2, the second tight point；3, third tight point；4, the 4th tight point；5,
Five tight points.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the embodiment of the invention provides a kind of bi-lateral horizontal wells to change shaft bottom production method, including following step
It is rapid:
Step 10, structure determination the first tight point 1 according to bi-lateral horizontal well, the second tight point 2, the 4th tight point 4
With the position of branch well hole windowing；
Step 20, the lower end that racecourse bend is mounted on to pumping pipe string simultaneously transfer pumping pipe string to the first tight point 1
When square set distance, the lowering velocity of pumping pipe string is controlled, pumping pipe string is made to pass through the first tight point 1；
Step 30 rotates at branch well hole windowing position and continues to transfer pumping pipe string, according to the position of the second tight point 2
It sets and judges whether pumping pipe string enters branch well hole with the position of the 4th tight point 4；
Step 40, when pumping pipe string be hampered position it is identical as 2 position of the second tight point when, pumping pipe string enters main borehole,
It is above mentioned above pumping pipe string to branch well hole windowing position at this time and repeats step 30；When pumping pipe string be hampered position with the 4th meet
When 4 positions of resistance point are identical, pumping pipe string enters branch well hole, and tripping in rod string carries out operation at this time.
Wherein the first tight point 1 is located at branch well hole windowing top, and the second tight point 2 and the 4th tight point 4 are respectively positioned on point
The lower section of branch wellbore windowing, the second tight point 2 are located in main borehole, and the 4th tight point 4 is located in branch well hole.The present invention is implemented
It further include third tight point 3 and the 5th tight point 5 in example, third tight point 3 is arranged in main borehole, in the extension side of main borehole
Upwards, third tight point 3 is located at the lower section of the second tight point 2.On the extending direction of branch well hole, the 5th tight point 5 is located at
The lower section of 4th tight point 4.
The embodiment of the present invention solves the problems, such as that bi-lateral horizontal well top set wellbore fails effectively to employ, and realizing will production
The demand of the accurate tripping in assigned finger wellbore production of tubing string, makes two branch well holes of bi-lateral horizontal well obtain effective benefit
With improving the recovery ratio of oil well.
Specifically, step 10 further includes production racecourse bend: the lower end of an oil pipe being fixedly connected with a silk plug, and in oil
The middle part setting position of pipe bends oil pipe, and the bending length of oil pipe is greater than the casing inner diameter of bi-lateral horizontal well.
Wherein, above-mentioned silk plug vertical direction on along chamfering, lower edge not chamfering, it is therefore an objective to which increase is hampered induction.Oil pipe
Bend the casing inner diameter 100mm to 150mm that length is greater than bi-lateral horizontal well.Purpose is that the end of oil pipe is made to be close to internal surface of sleeve pipe
And there is the surplus of 10mm or more.Above-mentioned middle part setting position is 4m to 4.5m apart from oil pipe lower end distance.
Step 10 further includes outside the pump barrel of pumping pipe string plus armored pump cylinder pillar, pump barrel pillar are installed at outside pump barrel, guarantees
Oil well pump prevents pump barrel to be squeezed and deformed damage during tripping in.
Further, step 10 further include:
Act the flow string that bi-lateral horizontal well normally produces, which includes production sucker rod, production oil pumping
Pump and production tube.
Pumping pipe string is successively accurately measured in order and is recorded, and carries out mark in the possible tight point of bi-lateral horizontal well
Note.
Preferably, step 20 includes: in the embodiment of the present invention
Step 21, the lower end that racecourse bend is mounted on to pumping pipe string simultaneously transfer pumping pipe string to the first tight point 1
Square 10m to 15m apart from when, the lowering velocity of pumping pipe string is controlled in 3m/min to 5m/min.
Step 22 raises and decentralizes pumping pipe string repeatedly, and the reality for determining the first tight point 1 is read according to the load of weight indicator
Border position.Wherein it is determined that the method for tight point are as follows: reading operation machine weight indicator running string load reading, when negative on weight indicator
The slowly decline of lotus reading, then the point is tight point.
Step 23, when weight indicator load reading decline setting numerical value when, rotation (with hydraulic tongs along tight pumping pipe string direction
Rotation pumping pipe string) and slowly transfer pumping pipe string.
Step 24, when weight indicator load read continue to decline when, above mention pumping pipe string and repeat step 23；Work as weight indicator
Load reading restore to tubing string initial load reading when, then continue slowly decentralization pumping pipe string.
Wherein, in step 23, when the load reading of weight indicator declines 1 ton to 2 ton hours, rotation simultaneously slowly transfers oil pick-up tube
Column.
The practical application of the embodiment of the present invention is as follows:
The embodiment of the present invention carries out wellbore in more than 10 mouth bi-lateral horizontal well of Liaohe Oil Field and imports test.One-time success rate
100%, qualification rate 100% of constructing.Especially side platform-H26 well, after changing shaft bottom production, the oil that averagely increases day by day is up to 3.2 tons.
By taking side platform-H26 well as an example: the well pump is hung: 1900.78m；Hydrodynamic face: 1805.44m；Top set's hanger position:
1555.13m；Oil is mended away from 4.78m；Main borehole casing: outer diameter 244.5mm, wall thickness 11.99mm；Top set's well bore casing: outer diameter
139.7mm wall thickness 9.19mm.Hydrodynamic face is in top set's hanger position hereinafter, determining that top set's wellbore is not employed, it is desirable that tripping in
The production of top set's wellbore.
(1) preparation of construction
Production imports bend pipe: selecting an intact Φ 73mm external upset tubing, lower part connects silk plug and to upper edge
Chamfering, lower edge not chamfering.In the middle position of oil pipe by its bending (at lower end about 4.5m), the camber after bending is required as oil
Pipe end lateral distance deflects away from 248mm (calculation method: main borehole sleeve outer-wall thickness × 2- tubing diameter+100mm), and makes
Oil pipe keeps certain rigidity and elasticity, guarantees that top set's wellbore can be entered when oil pipe end reaches top set windowing position
It is interior.
Pump barrel pillar is made, is installed at outside pump barrel, prevents pump barrel to be squeezed and deformed during tripping in.
Bi-lateral horizontal well completion interval of well body structure and downhole tool are analysed in depth, is found accurately in main borehole and top set's wellbore
Possible tight point: the first tight point 1 (upper horn mouth, position 1552.94m), the second tight point 2 (well workover orienting cover, position
1564.63m), third tight point (A point hanger, position 1604.26m), the 4th tight point 4 (releasing tool, position
1560.84m), the 5th tight point 5 (rotary joint, position 1572.95m).
It acts former well flow string: acting the flow string that bi-lateral horizontal well normally produces, flow string includes production
Sucker rod, production oil well pump and production tube.Oil pipe is successively accurately measured in order and is recorded, and possible in bi-lateral horizontal well
Tight point mark.
(2) top set's wellbore imports construction
The importing bend pipe for connecting silk plug is mounted on to the lowest part of pumping pipe string, be sequentially connected above screen casing, oil well pump and
Oil pipe.
When 163 oil pipe (1543.48m) of tripping in, by calculating, (calculating side when position 4.68m away from the first tight point 1
Method :=upper horn mouth position-tripping in tubing length-oil benefit away from).By (the every 1 meter quarter of mark high scale outside next oil pipe
Degree), slowly transfer.
When marking the oil pipe tripping in 2.2m of scale, load is begun to decline by 14.6 tons on working rig weight indicator, judges to import
Bend pipe is down toward 1 position of the first tight point.
When load rotates tubing string along tight tubing string direction with hydraulic tongs, when rotation 6 is enclosed, refer to weight to 13.6 ton hours on weight indicator
Table load gos up to 14.6 tons, judges that importing bend pipe passes through the first tight point 1.
Top set's wellbore position that opens a window is 1560.24m, continues slowly that lower drain line 7.3m is to the position that opens a window, rotation pipeline,
Racecourse bend is set to enter top set's wellbore.
Continue lower drain line, is hampered at the 4th tight point 4 (1560.84m) and the 5th tight point 5 (1572.95m), sentences
Disconnected flow string tripping in top set wellbore.Main borehole tight point (position of third tight point 3: 1604.26m) repeatedly on put
Tubing string is put, without the display that is hampered, further verifies flow string tripping in top set wellbore.
By light maintenance operation underground engineering design tripping in rod string.Rod string assemblage are as follows: 38 pistons of Φ × 1.50m+ connects
It is empty that bar × 1 × 9.12m+ of 19H grades of 6.00m+ Φ bar Φ 19 is molded the circuit 75 × 667.13m+ of bar pipe nipple × 0.20m+ Φ 36
The 36 hollow polished rod side core bar 114 × 1036.86m+, 50 × 13.00m+ of hollow stem eccentric wear device Φ enters 9.00m.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements: the present invention is real
It applies example and solves the problems, such as that bi-lateral horizontal well top set wellbore fails effectively to employ, the accurate tripping in of flow string is specified in realization
The demand of branch well hole production, makes two branch well holes of bi-lateral horizontal well be utilized effectively, improves adopting for oil well
Yield.
The above, only specific embodiments of the present invention cannot limit the range that invention is implemented with it, so it is equivalent
The displacement of component, or according to equivalent variations made by the invention patent protection scope and modification, should all still fall within what this patent was covered
Scope.In addition, between technical characteristic and technical characteristic in the present invention, between technical characteristic and technical solution, technical solution with
Use can be freely combined between technical solution.
Claims (8)
1. a kind of bi-lateral horizontal well changes shaft bottom production method, which comprises the following steps:
Step 10 is hampered according to the first tight point of structure determination (1) of the bi-lateral horizontal well, the second tight point (2), the 4th
The position of point (4) and branch well hole windowing；
Step 20, the lower end that racecourse bend is mounted on to pumping pipe string simultaneously transfer the pumping pipe string to the first tight point (1)
When the set distance of top, the lowering velocity of the pumping pipe string is controlled, the pumping pipe string is made to pass through the first tight point (1)；
Step 30 rotates at branch well hole windowing position and continues to transfer pumping pipe string, according to the second tight point (2)
The position of position and the 4th tight point (4) judges whether the pumping pipe string enters branch well hole；
Step 40, when the pumping pipe string be hampered position it is identical as the second tight point (2) position when, the pumping pipe string enters master
Wellbore above mentions above the pumping pipe string to branch well hole windowing position at this time and repeats step 30；When the oil pick-up tube
Column be hampered position it is identical as the 4th tight point (4) position when, the pumping pipe string enter the branch well hole, tripping at this time oil pumping
Roofbolt carries out operation.
2. bi-lateral horizontal well according to claim 1 changes shaft bottom production method, which is characterized in that step 20 includes step
21: the racecourse bend being mounted on the lower end of pumping pipe string and transfers the pumping pipe string to above the first tight point (1)
10m to 15m apart from when, the lowering velocity of the pumping pipe string is controlled in 3m/min to 5m/min.
3. bi-lateral horizontal well according to claim 2 changes shaft bottom production method, which is characterized in that step 20 further include:
Step 22 raises and decentralizes the pumping pipe string repeatedly, is read according to the load of weight indicator and determines the first tight point (1)
Physical location；
Step 23, when the weight indicator load reading decline setting numerical value when, rotate simultaneously slowly transfer the pumping pipe string；
Step 24, when the weight indicator load read continue to decline when, above mention the pumping pipe string and repeat step 23；Work as institute
When stating load reading recovery to the tubing string initial load reading of weight indicator, then continue slowly to transfer the pumping pipe string.
4. bi-lateral horizontal well according to claim 3 changes shaft bottom production method, which is characterized in that in the step 23,
When the load reading of the weight indicator declines 1 ton to 2 ton hours, rotation simultaneously slowly transfers the pumping pipe string.
5. bi-lateral horizontal well according to claim 1 changes shaft bottom production method, which is characterized in that the step 10 is also wrapped
Include production racecourse bend:
The lower end of a piece oil pipe is fixedly connected with a silk plug, and bends the oil pipe in the middle part setting position of the oil pipe,
The bending length of the oil pipe is greater than the casing inner diameter of the bi-lateral horizontal well.
6. bi-lateral horizontal well according to claim 5 changes shaft bottom production method, which is characterized in that the bending of the oil pipe
Length is greater than the casing inner diameter 100mm to 150mm of the bi-lateral horizontal well.
7. bi-lateral horizontal well according to claim 5 changes shaft bottom production method, which is characterized in that the middle part of the oil pipe
Lower end distance of the setting position apart from the oil pipe is 4m to 4.5m.
8. bi-lateral horizontal well according to claim 1 changes shaft bottom production method, which is characterized in that the step 10 is also wrapped
It includes and adds armored pump cylinder pillar outside the pump barrel of the pumping pipe string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811306663.0A CN109236249B (en) | 2018-11-05 | 2018-11-05 | Double-branch horizontal well bottom-changing production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811306663.0A CN109236249B (en) | 2018-11-05 | 2018-11-05 | Double-branch horizontal well bottom-changing production method |
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| CN109236249A true CN109236249A (en) | 2019-01-18 |
| CN109236249B CN109236249B (en) | 2021-01-01 |
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ID=65076694
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|---|---|---|---|---|
| US5311936A (en) * | 1992-08-07 | 1994-05-17 | Baker Hughes Incorporated | Method and apparatus for isolating one horizontal production zone in a multilateral well |
| CN1644869A (en) * | 2005-02-01 | 2005-07-27 | 中国石化集团胜利石油管理局钻井工艺研究院 | Completion device and method for branch well with pre-windows |
| GB2440232B (en) * | 2003-12-01 | 2008-06-25 | Halliburton Energy Serv Inc | Multilateral completion system utilizing an alternative passage |
| CN101787856A (en) * | 2010-03-11 | 2010-07-28 | 中国石油集团川庆钻探工程有限公司 | Reentry method of later-operation pipe column of multi-branch well |
| CN101956544A (en) * | 2009-07-21 | 2011-01-26 | 上海石油天然气有限公司 | Method for oil extraction in multi-bottom and multi-branch well by artesian injection |
| CN103375140A (en) * | 2012-04-13 | 2013-10-30 | 中国石油天然气集团公司 | Radial horizontal well orienting device and method for operating same |
-
2018
- 2018-11-05 CN CN201811306663.0A patent/CN109236249B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5311936A (en) * | 1992-08-07 | 1994-05-17 | Baker Hughes Incorporated | Method and apparatus for isolating one horizontal production zone in a multilateral well |
| GB2440232B (en) * | 2003-12-01 | 2008-06-25 | Halliburton Energy Serv Inc | Multilateral completion system utilizing an alternative passage |
| CN1644869A (en) * | 2005-02-01 | 2005-07-27 | 中国石化集团胜利石油管理局钻井工艺研究院 | Completion device and method for branch well with pre-windows |
| CN101956544A (en) * | 2009-07-21 | 2011-01-26 | 上海石油天然气有限公司 | Method for oil extraction in multi-bottom and multi-branch well by artesian injection |
| CN101787856A (en) * | 2010-03-11 | 2010-07-28 | 中国石油集团川庆钻探工程有限公司 | Reentry method of later-operation pipe column of multi-branch well |
| CN103375140A (en) * | 2012-04-13 | 2013-10-30 | 中国石油天然气集团公司 | Radial horizontal well orienting device and method for operating same |
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| CN109236249B (en) | 2021-01-01 |
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