CN105971555A - Leaking stoppage barrel and leaking stoppage slurry combined leaking stoppage method specific to fractured formation - Google Patents
Leaking stoppage barrel and leaking stoppage slurry combined leaking stoppage method specific to fractured formation Download PDFInfo
- Publication number
- CN105971555A CN105971555A CN201610293031.XA CN201610293031A CN105971555A CN 105971555 A CN105971555 A CN 105971555A CN 201610293031 A CN201610293031 A CN 201610293031A CN 105971555 A CN105971555 A CN 105971555A
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- Prior art keywords
- leaking stoppage
- leak stopping
- leakage
- plugging slurry
- slurry
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- 239000002002 slurry Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000015572 biosynthetic process Effects 0.000 title abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000007943 implant Substances 0.000 claims description 22
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 239000010721 machine oil Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 208000010040 Sprains and Strains Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention provides a leaking stoppage barrel and leaking stoppage slurry combined leaking stoppage method specific to a fractured formation. The method comprises the following steps that whether leakage is fractured leakage or not is judged, and the position of a leakage layer is determined; a leaking stoppage barrel is machined; the leaking stoppage barrel is driven into the position below the drilling fluid level in a well; when the leaking stoppage barrel is driven into the upper portion of a leakage layer well section, water ways are filled in the position 30-50 m away from the leakage layer, and filler in the barrel is ejected and released by starting a pump; leaking stoppage slurry is driven into a drill stem, and substitutive slurry is in place; and the leaking stoppage slurry is driven into the drill stem, so that the fillers and the leaking stoppage slurry enter the leakage layer, and leaking stoppage is achieved. According to the leaking stoppage barrel and leaking stoppage slurry combined leaking stoppage method specific to the fractured formation, the leaking stoppage measurement and technical problems in vicious well leakage are solved, especially for the fractured formation leakage, the leaking stoppage method is effective, and the well leakage of the fractured formation is well solved.
Description
Technical field
The invention belongs to drilling failure complex process field, especially relate to the leak stopping for fractured reservoir
Cylinder and plugging slurry associating blocking method.
Background technology
In current drilling process, owing to strata condition is complicated, when drilling strata exists extensive crack
Time, easily there is severe well leakage, in causing pit shaft, drilling fluid reduces until losing and returning rapidly, and impact is normal bores
Well, cause borehole well instability, induction formation fluid pour in pit shaft blowout.Therefore, the leakage of fractured reservoir
Mistake must draw attention, and focuses on the plugging operations of fractured reservoir.
Fractured reservoir blocking method purpose is to block formation fracture, thus reduces drilling fluid leakage, releases
Leakage is dangerous.A lot of class plugging slurry is had been developed for currently for fractured reservoir, but due to crack
Not of uniform size, in practical operation, it is difficult to release leakage by single plugging slurry.
This method derives from on-the-spot actual plugging operations, after there is fractured leakage, uses plugging slurry
Leak stopping is repeatedly continuously, does not obtains effect.Then the leak stopping cylinder for fractured reservoir and leak stopping mud have been invented
Slurry associating blocking method, successfully releases leakage.
Summary of the invention
In view of this, it is contemplated that be proposed for the leak stopping cylinder of fractured reservoir and plugging slurry is combined stifled
Leakage method, can effectively realize leak stopping purpose, saves the Slot Handling time, and improves drillng operation efficiency.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of leak stopping cylinder for fractured reservoir, including sleeve pipe and implant, described its lower end is provided with
Chamfering；Described casing length is 7～9m, the diameter of sleeve pipe than borehole wall diameter at drop ply little 2～5mm, and
Sleeve opening is welded with reinforcing bar, and described implant is located in sleeve pipe.
Further, described implant is rubber wheel mole, coir rope section, wooden unit, cotton yarn and cloth.
Further, described implant surface speckles with lubricant, and described lubricant is machine oil or lead oil.
Further, described implant a length of 5～20cm.
Further, described reinforcing bar is arranged in a crossed manner.
Present invention also offers the leak stopping cylinder for fractured reservoir and plugging slurry associating blocking method, bag
Include following steps:
1) determine whether fractured leakage according to mud wastage, determine drop ply position simultaneously, described
The wastage of fractured leakage is 20～100m3/h；
2) when judging that above-mentioned leakage is fractured leakage, variable buckle joint will be connect on described leak stopping cylinder and float
Valve；
3) by drilling rod by 10m under leak stopping cylinder G.I.H drilling well liquid level, first pour in drilling rod
300～500m drilling fluids, after pour into plugging slurry, keep during pouring into plugging slurry in drilling rod be
Negative pressure state；
4), when leak stopping cylinder is lowered into drop ply well section top, at distance drop ply 30～50m, hydrophthalmia is filled,
The implant that turn on pump ejects, discharges in leak stopping cylinder；
5) in drilling rod, squeeze into plugging slurry, put in place for slurry；
6) if plugging slurry returns out, close blowout preventer, pressure of spraining, continue to squeeze into plugging slurry, make implant
Being directly entered fracture formation, follow-up plugging slurry follows up immediately, blocks drop ply；
7) if plugging slurry does not returns out, first calculate according to the leakage speed injecting plugging slurry amount and early stage,
In anticipated well, the height of plugging slurry, rises drilling rod and gets into this height and position, adds in well head pressurization or circulation
Pressure, makes implant enter drop ply with plugging slurry, thus realizes leak stopping.
Further, pressure pressure of spraining described in is less than 10MPa.
Further, the pressure of the pressurization of described well head or circulation pressurization is 3～5MPa.
Relative to prior art, the leak stopping cylinder for fractured reservoir of the present invention and plugging slurry connection
Conjunction blocking method has the advantage that
Leak stopping cylinder for fractured reservoir of the present invention and plugging slurry associating blocking method, solve
Leaking-stopping measure when there is severe well leakage and technical problem, be particularly suited for fractured reservoir leakage, be
A kind of effective blocking method, preferably solves the circulation problems of fractured reservoir.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, the present invention's
Schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.?
In accompanying drawing:
Fig. 1 is the leak stopping cylinder for fractured reservoir described in the embodiment of the present invention and plugging slurry is combined stifled
The schematic diagram of leakage method；
Fig. 2 is the leak stopping cylinder for fractured reservoir described in the embodiment of the present invention and plugging slurry is combined stifled
The flow chart of leakage method.
Description of reference numerals:
1-drilling rod；2-plugging slurry；The 3-borehole wall；4-leak stopping cylinder；5-crack；6-fractured reservoir；7-fills out
Fill thing.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the spy in embodiment
Levy and can be mutually combined.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " on ",
D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward "
It is based on orientation shown in the drawings or position relationship in the orientation indicated or position relationship, is for only for ease of
Describe the present invention and simplification description rather than instruction or the device of hint indication or element must have specific
Orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally,
Term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicate or imply relatively important
Property or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the invention
In, except as otherwise noted, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term
" install ", " being connected ", " connection " should be interpreted broadly, and connect for example, it may be fixing, it is also possible to be
Removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be straight
Connect connected, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For
For those of ordinary skill in the art, can understand that above-mentioned term is in the present invention by concrete condition
Concrete meaning.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As a example by the AGCSXX well of XX oil field, the method is implemented step and is:
1) creeping into 3069m when well, find that pump pressure declines suddenly, well head loses and returns, and liquid level loses, institute
Rock drilling is limestone, is judged as Fractured severe leakage according to on-the-spot wastage；
2) preparing leak stopping cylinder 4, the radius of sleeve pipe is 6-5/8 ", 2mm less than the diameter of the borehole wall 3, long
Degree is 9m, and its lower end is provided with chamfering；
3) prepare implant 7, such as rubber wheel mole, coir rope section, wooden unit, cotton yarn and cloth, prepare useless
Machine oil 20L, is stained with machine oil by described implant 7, a length of the 10～15cm of described implant 7；
4) the described implant 7 being stained with machine oil being filled in leak stopping cylinder 4, top actual load is full, is handed over by four reinforcing bars
Fork is welded in 4 mouthfuls of leak stopping cylinder；
5) variable buckle joint and float valve are connect by leak stopping cylinder 4；
6) before going into the well, evaluating borehole liquid level is 2850m；
7), when leak stopping cylinder enters to 219m for 4 times, start to pour into drilling fluid in drilling rod 1；
8) in drilling rod 1, first pour into the isolation of 500m normal drilling fluid, after pour into plugging slurry 2, all the time
Keep negative pressure state in drilling rod 1；
9), when leak stopping cylinder 4 is lowered into drop ply well section top, at 3020m, hydrophthalmia is filled, turn on pump ejects,
Release cylinder inner stuffing 7；
10) squeezing into plugging slurry 2 in drilling rod 1 is 30 sides, puts in place for slurry；
11) plugging slurry 2 returns out, directly closes blowout preventer and sprains pressure, and leak stopping mud is squeezed in continuation in drilling rod 1
Slurry 2, keeps vertical and is pressed in 3～5MPa, make implant 7 be directly entered fractured reservoir 6, follow-up leak stopping mud
Slurry 2 drop ply of follow-up closure immediately.
This method during operation be applicable to relatively deep-well, is bored and is met large fracture stratum 6, and circulation mistake is returned, no
See the severe leakage situation of liquid level, effectively can throw in the flexibility or rigidity implant of large-size in drop ply
7, first in drop ply, play bridge formation plugging action, after follow up common plugging slurry 2, enrich and fill out crack 5
Dual measure leak stopping, effect is notable, and practicality is stronger.Before not carrying out associating leak stopping, wastage reaches
3984.2m3, cannot creep at all, after this well carries out four associating leak stopping, leakage situation substantially alleviates,
Reach the requirement normally crept into.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. made, should be included in
Within protection scope of the present invention.
Claims (8)
1. the leak stopping cylinder for fractured reservoir, it is characterised in that: include sleeve pipe and implant (7),
Described its lower end is provided with chamfering；Described casing length is 7～9m, and the diameter of sleeve pipe is than the borehole wall at drop ply
(3) diameter little 2～5mm, and sleeve opening are welded with reinforcing bar, and described implant (7) is located in sleeve pipe.
A kind of leak stopping cylinder for fractured reservoir the most according to claim 1, it is characterised in that:
Described implant (7) is rubber wheel mole, coir rope section, wooden unit, cotton yarn and cloth.
A kind of leak stopping cylinder for fractured reservoir the most according to claim 2, it is characterised in that:
Described implant (7) surface speckles with lubricant, and described lubricant is machine oil or lead oil.
A kind of leak stopping cylinder for fractured reservoir the most according to claim 2, it is characterised in that:
Described implant (7) a length of 5～20cm.
A kind of leak stopping cylinder for fractured reservoir the most according to claim 1, it is characterised in that:
Described reinforcing bar is arranged in a crossed manner.
6. one kind uses according to the leak stopping cylinder for fractured reservoir described in any one of Claims 1 to 5
And plugging slurry associating blocking method, it is characterised in that: comprise the steps:
1) determine whether fractured leakage according to mud wastage, determine drop ply position simultaneously, described
The wastage of fractured leakage is 20～100m3/h；
2) when judging that above-mentioned leakage is fractured leakage, variable buckle joint will be connect on described leak stopping cylinder (4)
And float valve；
3) by drilling rod by 10m under leak stopping cylinder (4) G.I.H drilling well liquid level, in drilling rod (1)
First pour into 300～500m drilling fluids, after pour into plugging slurry (2), pouring into plugging slurry (2) mistake
It is negative pressure state in journey keeps drilling rod (1)；
4), when leak stopping cylinder (4) is lowered into drop ply well section top, at distance drop ply 30～50m, water is filled
Eye, the implant (7) that turn on pump ejects, discharges in leak stopping cylinder (4)；
5) in drilling rod (1), squeeze into plugging slurry (2), put in place for slurry；
6) if plugging slurry (2) returns out, close blowout preventer, pressure of spraining, continue to squeeze into plugging slurry (2),
Making implant (7) be directly entered fractured reservoir (6), follow-up plugging slurry (2) follows up immediately,
Closure drop ply；
7) if plugging slurry (2) does not returns out, first according to injecting the amount of plugging slurry (2) and early stage
Leakage speed calculates, it is contemplated that the height of plugging slurry (2) in well, is risen by drilling rod (1) and gets into this height
Position, in well head pressurization or circulation pressurization, makes implant (7) enter drop ply with plugging slurry (2),
Thus realize leak stopping.
Leak stopping cylinder for fractured reservoir the most according to claim 6 and plugging slurry are combined stifled
Leakage method, it is characterised in that pressure pressure of spraining described in: is less than 10MPa.
Leak stopping cylinder for fractured reservoir the most according to claim 6 and plugging slurry are combined stifled
Leakage method, it is characterised in that: the pressure of the pressurization of described well head or circulation pressurization is 3～5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293031.XA CN105971555B (en) | 2016-05-05 | 2016-05-05 | A kind of leak stopping cylinder and plugging slurry joint blocking method for fractured reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293031.XA CN105971555B (en) | 2016-05-05 | 2016-05-05 | A kind of leak stopping cylinder and plugging slurry joint blocking method for fractured reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105971555A true CN105971555A (en) | 2016-09-28 |
| CN105971555B CN105971555B (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610293031.XA Active CN105971555B (en) | 2016-05-05 | 2016-05-05 | A kind of leak stopping cylinder and plugging slurry joint blocking method for fractured reservoir |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107722954A (en) * | 2017-11-01 | 2018-02-23 | 中石化石油工程技术服务有限公司 | A kind of sealing agent, leak stopping slurries and leak-blocking construction method for borehole wall fractures leakage |
| CN109538158A (en) * | 2018-10-31 | 2019-03-29 | 中国石油集团川庆钻探工程有限公司 | The method for improving cement slurry blocking construction success rate |
| CN109723404A (en) * | 2019-03-04 | 2019-05-07 | 中国煤炭地质总局广东煤炭地质局勘查院 | Coal measure gas prospect pit naked eye device for plugging and method |
| CN110439498A (en) * | 2019-08-08 | 2019-11-12 | 中国石油集团渤海钻探工程有限公司 | A kind of use can postpone the middle-deep well blocking method of water swelling sealing agent |
| CN110984887A (en) * | 2019-11-12 | 2020-04-10 | 中国石油大学(北京) | Drilling fluid flow guide device and drill column for plugging offshore high-temperature and high-pressure well |
| CN113323619A (en) * | 2020-02-28 | 2021-08-31 | 中国石油化工股份有限公司 | Leakage blocking method for oil and gas well |
| CN113775313A (en) * | 2021-09-13 | 2021-12-10 | 中石化石油工程技术服务有限公司 | Method for breaking cement plug in case of losing return of superficial layer |
| US11261692B2 (en) * | 2020-04-15 | 2022-03-01 | Saudi Arabian Oil Company | Method and apparatus for identifying and remediating loss circulation zone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2451726Y (en) * | 2000-11-07 | 2001-10-03 | 张福营 | Flexible sleeve plug |
| CN2654845Y (en) * | 2003-10-24 | 2004-11-10 | 四川石油管理局川东钻探公司 | Built in bag type leaking stoppage apparatus |
| CN2675851Y (en) * | 2003-10-24 | 2005-02-02 | 四川石油管理局川东钻探公司 | Leakage stopper with externally placed bag |
| CN100510314C (en) * | 2005-10-17 | 2009-07-08 | 中国石油集团川庆钻探工程有限公司 | Filling and leakage blocking process for cracking leak gravel |
| CN201024981Y (en) * | 2007-04-24 | 2008-02-20 | 中国石油天然气股份有限公司 | Physical leakage and lockage prevention under-well toll with a driller |
| CN101250398A (en) * | 2008-03-25 | 2008-08-27 | 施晓红 | Well drilling leak-proof sealing agent |
| GB201317626D0 (en) * | 2013-10-04 | 2013-11-20 | Schlumberger Holdings | Solids in borehole fluids |
| CN104194748A (en) * | 2014-08-06 | 2014-12-10 | 中国石油集团渤海钻探工程有限公司 | Pressure-bearing plugging agent for high temperature deep well |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107722954A (en) * | 2017-11-01 | 2018-02-23 | 中石化石油工程技术服务有限公司 | A kind of sealing agent, leak stopping slurries and leak-blocking construction method for borehole wall fractures leakage |
| CN107722954B (en) * | 2017-11-01 | 2020-03-24 | 中石化石油工程技术服务有限公司 | Plugging agent for fractured leakage of drilling well, plugging slurry and plugging construction method |
| CN109538158A (en) * | 2018-10-31 | 2019-03-29 | 中国石油集团川庆钻探工程有限公司 | The method for improving cement slurry blocking construction success rate |
| CN109723404A (en) * | 2019-03-04 | 2019-05-07 | 中国煤炭地质总局广东煤炭地质局勘查院 | Coal measure gas prospect pit naked eye device for plugging and method |
| CN109723404B (en) * | 2019-03-04 | 2024-04-16 | 中国煤炭地质总局广东煤炭地质局勘查院 | Naked eye plugging device and method for coal gas exploration well |
| CN110439498A (en) * | 2019-08-08 | 2019-11-12 | 中国石油集团渤海钻探工程有限公司 | A kind of use can postpone the middle-deep well blocking method of water swelling sealing agent |
| CN110439498B (en) * | 2019-08-08 | 2021-09-28 | 中国石油集团渤海钻探工程有限公司 | Medium-deep well plugging method adopting plugging agent capable of delaying water absorption expansion |
| CN110984887A (en) * | 2019-11-12 | 2020-04-10 | 中国石油大学(北京) | Drilling fluid flow guide device and drill column for plugging offshore high-temperature and high-pressure well |
| CN113323619A (en) * | 2020-02-28 | 2021-08-31 | 中国石油化工股份有限公司 | Leakage blocking method for oil and gas well |
| CN113323619B (en) * | 2020-02-28 | 2022-07-01 | 中国石油化工股份有限公司 | Plugging method for oil and gas well |
| US11261692B2 (en) * | 2020-04-15 | 2022-03-01 | Saudi Arabian Oil Company | Method and apparatus for identifying and remediating loss circulation zone |
| CN113775313A (en) * | 2021-09-13 | 2021-12-10 | 中石化石油工程技术服务有限公司 | Method for breaking cement plug in case of losing return of superficial layer |
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| Publication number | Publication date |
|---|---|
| CN105971555B (en) | 2019-03-29 |
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Effective date of registration: 20210918 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: No.106 Huanghai Road, Binhai New Economic and Technological Development Zone, Tianjin 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |