CN104806197B - A kind of vibration cementing system and method - Google Patents
A kind of vibration cementing system and method Download PDFInfo
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- CN104806197B CN104806197B CN201510194334.1A CN201510194334A CN104806197B CN 104806197 B CN104806197 B CN 104806197B CN 201510194334 A CN201510194334 A CN 201510194334A CN 104806197 B CN104806197 B CN 104806197B
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- sleeve pipe
- explosive
- liquid
- vibration
- described sleeve
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- 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
- 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
Abstract
The present invention provides a kind of vibration cementing system, including：The sleeve pipe in precalculated position in Oil/gas Well can be lowered into, annular space is formed between described sleeve pipe and the borehole wall of the Oil/gas Well, the annular space is used to house cement mortar, is placed in the liquid in described sleeve pipe；The explosive in the liquid is suspended in, the vibration that the liquid is produced when can be by the explosive detonation passes to described sleeve pipe and cement mortar.The present invention also provides a kind of method cemented the well using above-mentioned vibration cementing system, and its step is that sleeve pipe is lowered into precalculated position in Oil/gas Well, and annular space is formed between described sleeve pipe and the borehole wall of the Oil/gas Well；Cement mortar is injected into the annular space；Liquid is injected into described sleeve pipe；The tripping in explosive into the liquid；Control the medicine detonation.The present invention originates by using explosive detonation as vibration, and the Dynamic Loading power that detonation is produced is strong, and the vibrating effect of sleeve pipe and outside tube water slurry body is more obvious, and cementing quality is improved.
Description
Technical field
The invention belongs to oil gas development technology field, more particularly to a kind of vibration cementing system and method.
Background technology
Well cementation is one of key link of drilling engineering, is a kind of quality improving environment in Well Completion Engineering of Oil Reservoirs；Cementing quality
Play an important roll for extension Oil/gas Well life-span and performance Oil ＆ Gas Productivity.
Vibration cementing is during setting of casing, cement injecting, replacement and time are coagulated, using mechanical oscillation, hydraulic pressure or air arteries and veins
The means such as punching, hydraulic blow, produce effect of vibration in sleeve pipe, drilling fluid and cementing fluid to improve a technology of cementing quality.
It was verified that vibration can improve cement strength, reduction drilling fluid viscosity improves displacement efficiency, eliminates the gas in cement slurry
Bubble, forms intact cement sheath；Curing time can also be shortened, prevent the oil after well cementation, gas and water are mixed from altering, be conducive to improving boundary
The cementing strength in face, effectively increases cementing quality.
However, existing vibration cementing technology has the problem of oscillation intensity is weaker.To study and be tried out the most at present
Exemplified by extensive waterpower pulse vibration cementing system, the vibration cementing system is typically mounted above casing shoe, is used as bunch tube
A part with sleeve pipe G.I.H, during well-flushing, cementing, replacing cement mortar, by working fluid in sleeve pipe
Impulsive force, periodically change flow section at its position and produce action of periodically damming, and then generation cycle
Property exciting force, realize well cementation purpose.During being returned on cement slurry, due to its continuous erosion to sleeve bottom, even if not
Using waterpower pulse vibrating device, displacement efficiency of cement slurry and cementing quality near sleeve bottom can be also effectively ensured.
And in the middle part of sleeve pipe and top is because away from the vibrating device, these positions are only the main effective object of device of excitation, due to water
Power impulse oscillation device is typically mounted on the sleeve pipe close to shaft bottom position, its vibration produced along along sleeve pipe upload procedure by
Degradation subtracts so that the interval isolation oscillation intensity in the middle part of sleeve pipe and top weakens, so as to influence cementing quality.
The content of the invention
There is the problem of intensity is weaker for existing vibration cementing technology, the invention provides a kind of vibration cementing system
And method, its technical scheme is as follows：
A kind of vibration cementing system, including：
The sleeve pipe in precalculated position in Oil/gas Well can be lowered into, ring is formed between described sleeve pipe and the borehole wall of the Oil/gas Well
Sky, the annular space is used to house cement mortar；
It is placed in the liquid in described sleeve pipe；
The explosive in the liquid is suspended in, the vibration that the liquid is produced when can be by the explosive detonation passes to described
Sleeve pipe and cement mortar.
Vibration cementing system as described above, including：The cable being connected with the pack of the explosive, the explosive passes through institute
State cable to be suspended in the liquid, the cable is used to control the explosive initiation.
Vibration cementing system as described above, the explosive is located in the middle part of the fluid column of liquid formation.
Vibration cementing system as described above, including plug, the plug are arranged on described sleeve pipe away from the Oil/gas Well
The end of well head.
It is a kind of to carry out vibration cementing method using above-mentioned vibration cementing system, comprise the following steps：
Sleeve pipe is lowered into precalculated position in Oil/gas Well, annular space is formed between described sleeve pipe and the borehole wall of the Oil/gas Well；
Cement mortar is injected into the annular space；
Liquid is injected into described sleeve pipe；
The tripping in explosive into the liquid；
Control the explosive detonation.
Vibration cementing method as described above, the footpath less than described sleeve pipe that the pack radial dimension of the explosive is set
To size, so that forming decoupling charge structure between the explosive and described sleeve pipe, its coefficient of decoupling charge is according to institute
The internal pressure strength for stating sleeve pipe is determined.
Vibration cementing method as described above, the safe equivalent of the explosive is true according to the internal pressure strength of described sleeve pipe
It is fixed.
Vibration cementing method as described above, using delayed ignition mode, flame proof between controlling the explosive on schedule
Hong.
Vibration cementing method as described above, the predetermined time interval is not coupled according to the type of the explosive and powder charge
Coefficient is determined.
Vibration cementing method as described above, the cement mortar is first injected into sleeve pipe, then to tripping in described sleeve pipe
Plug, then liquid is injected into described sleeve pipe, the liquid pushing tow the plug, so that the cement mortar replacement in sleeve pipe be arrived
In the annular space.
Technical scheme more than, the beneficial effects of the present invention are：
Originated by using explosive detonation as vibration, the Dynamic Loading power that detonation is produced is strong, sleeve pipe and outside tube water
The vibrating effect of slurry body is more obvious, and cementing quality is improved；
In a preferred approach, the liquid formed between explosive and sleeve pipe in decoupling charge structure, sleeve pipe is not as coupling
Medium (accumulation of energy medium), the part energy that can produce the detonation starting stage is stored in the form of kinetic energy and potential energy, cut
The weak initial pressure peak directly acted on casing wall, then pressure fluid the energy of storage is discharged again, effectively
Extend action time of the detonation load to sleeve pipe and outside tube water slurry body；
In addition, explosive is placed in liquid, the detonation energy that explosive is produced, by liquid, this homogeneous fluid is produced along footpath
To the cylindrical wave with axial direction, uniform load is on casing wall, and then the cement slurry for transmitting and acting on outside sleeve pipe, so that shaking
It is dynamic more uniform；
Furthermore, a kind of vibration cementing system and method for the invention cancels the vibration dress used in existing vibration cementing technology
Put, overall structure is simple, easy to operate, reduce because of the additional construction operation in underground caused by vibrating device failure or failure, from
And construction is become simple and easy to apply, input cost is greatly reduced；
, can be according to operating mode needs in practical operation, by adjusting explosive depth of setting, flexible grasp acts on well section, both may be used
Whole section of vibration also can local vibration；And by delayed ignition mode, control explosive is spaced, divided quick-fried several times to schedule
Hong, so as to produce periodic vibration wave and liquid fluctuating, strengthen vibrating effect, shorten construction period.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structural representation of vibration cementing system of embodiment of the present invention；
Fig. 2 is a kind of flow chart of vibration cementing method of embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to Fig. 1.A kind of vibration cementing system, including：The sleeve pipe 13 in precalculated position in Oil/gas Well can be lowered into, it is described
Annular space 15 is formed between the borehole wall 11 of sleeve pipe 13 and the Oil/gas Well, the annular space 15 is used to house cement mortar 17, described sleeve pipe
Liquid 19 is equipped with 13；The explosive 21 in the liquid 19 is suspended in, the liquid 19 is produced when can be by 21 detonation of explosive
Raw vibration passes to described sleeve pipe 13 and cement mortar 17.
In present embodiment, explosive detonation moment produces high pressure and discharges substantial amounts of energy, and detonation energy is with shock wave
The liquid that directly acts on around it of form.Liquid is impacted by detonation stress wave, on the one hand can cause the violent of its own
Vibrate (accumulation of energy)；The intersection in detonation product and liquid can produce reflection and transmit simultaneously, and transmitted wave continues energy to reach
Sleeve pipe, causes set tube vibration, and is reflected again and transmission effect in liquid and sleeve pipe intersection, further by detonation energy
Outside tube water mud is transferred to, causes the vibration of outside tube water slurry body.Back wave acts on liquid again after reflection, causes liquid
Vibration, this vibration will act on sleeve pipe and outside tube water slurry body again.In whole process, detonation energy passes through detonation stress wave
Transmission directly act on and reflect indirectly-acting, to it around liquid, sleeve pipe and outside tube water slurry body transmission, so as to cause
The vibration of sleeve pipe and outside tube water mud, reaches the mesh of vibration cementing.
Present embodiment does not have special requirement to the liquid, during practical engineering application, aqueous water, the tool used nearby
The fracturing fluid for having certain viscosity can meet requirement.
Explosive is lowered into sleeve pipe by present embodiment using the cable and the affixed mode of explosive pack of control explosive initiation
In interior liquid, explosive is suspended in liquid by cable；The middle part of the fluid column of liquid formation is preferably placed on, can so be filled
Divide the energy produced using explosive detonation.Present embodiment does not make special performance requirement to explosive yet, and explosive is in liquid
Middle detonation is the technological means of prior art comparative maturity.
Refer to Fig. 2.Embodiment of the present invention also provides a kind of method cemented the well using above-mentioned vibration cementing system,
Comprise the following steps：Sleeve pipe is lowered into precalculated position in Oil/gas Well, formed between described sleeve pipe and the borehole wall of the Oil/gas Well
Annular space；Cement mortar is injected into the annular space；Liquid is injected into described sleeve pipe；The tripping in explosive into the liquid；Control institute
State explosive detonation.
In present embodiment, the pack radial dimension of explosive is less than the radial dimension of sleeve pipe so that explosive and sleeve pipe it
Between form liquid in decoupling charge structure, sleeve pipe as not couplant (accumulation of energy medium), can be by the detonation starting stage
The part energy of generation is stored in the form of kinetic energy and potential energy, weakens the initial pressure directly acted on casing wall
Peak value.Further, since percussion of the liquid by detonation stress wave, liquid can obtain kinetic energy and potential energy, the liquid level of liquid in itself
The raising and lowering of meeting generating period.By this transfer process, the energy stored before liquid can be discharged, and added
Sleeve pipe and outside tube water mud are loaded in, so as to effectively increase the utilization rate of detonation energy, sleeve pipe and outside tube water mud is extended
Time of vibration.
In order to simplify construction, present embodiment is by the way of positive cement injection, i.e., in the first sprue bushing of cement mortar, then
The tripping in plug into sleeve pipe, then injection liquid (being referred to as displacement fluid) thereto, have certain pressure as the liquid of displacement fluid
Power, so that cement mortar is squeezed into the annular space formed between sleeve pipe and the Oil/gas Well borehole wall.Cement mortar is squeezed into after annular space, and plug will cover
Bottom of the tube is blocked, and prevents the liquid in sleeve pipe from penetrating into annular space because pressure moment increases in subsequent detonation process.
From the foregoing, liquid level, which obtains periodically fluctuation, produces preferably influence on vibration.Therefore, present embodiment is adopted
Delayed ignition mode is used, point detonation several times, so as to produce periodic vibration wave and liquid fluctuating, strengthens vibrating effect, quick-fried
Hong time interval is determined according to the type and coefficient of decoupling charge of explosive.
The specific workflow of embodiment of the present invention is as follows；
(1) according to the length of effect well section, according to sleeve body yield strength, blasting explosive secure equivalent, powder charge not coupling are designed
Syzygy number；
(2) assembling cable priming device and initiator head, after assembling is finished, check that initiator head wire connects situation with shell；
(3) by payout under cable car, under reach and marked after predetermined level on cable, act cable；
(4) replace and finish, after bruising after cement mortar, explosive, apparatus to cause bursting, cable connection is good, delayed by cable car
Slow decentralization, decentralization is stopped when specified location is reached；
(5) staff is away from well head, energization ignition charge；
(6) construction is finished, and acts cable.
What is used in a kind of existing vibration cementing technology of vibration cementing system and method cancellation of embodiment of the present invention shakes
Dynamic device, overall structure is simple, easy to operate, reduces because the additional construction in underground is made caused by vibrating device failure or failure
Industry, so that construction becomes simple and easy to apply, input cost is substantially reduced.
The main thought of embodiment of the present invention is by liquid to put on sleeve pipe by the energy for producing explosive detonation
With outside tube water slurry body, the vibration of sleeve pipe and outside tube water slurry body is realized, so as to reach raising cementing quality purpose.Due to using
The larger dangerous material of this power of explosive, therefore the security of construction is a significant problem having to take into account that.Present embodiment
Main safe equivalent by designing explosive, the two parameters of coefficient of decoupling charge ensure safety, and its numerical value is according to sleeve pipe
Internal pressure strength be determined, be not limited thereof herein.During practice of construction, due to the difference of hole condition condition, two
Parameter is configured accordingly, and the restriction to embodiment of the present invention is not constituted.
In addition, the liquid in sleeve pipe functions not only as accumulation of energy medium, it can also play certain in the moment of explosive detonation
Cushioning effect, prevents from damaging sleeve pipe because the pressure peak that detonation moment produces is larger, has certain contribution to safe construction.
Several embodiments of the present invention are the foregoing is only, those skilled in the art is according to application documents disclosure
Various changes or modification can be carried out to the embodiment of the present invention without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of vibration cementing system, it is characterised in that including：
The sleeve pipe in precalculated position in Oil/gas Well can be lowered into, annular space is formed between described sleeve pipe and the borehole wall of the Oil/gas Well, institute
Stating annular space is used to house cement mortar；
It is placed in the liquid in described sleeve pipe；
The explosive in the liquid is suspended in, the vibration that the liquid is produced when can be by the explosive detonation passes to described sleeve pipe
And cement mortar.
2. vibration cementing system as claimed in claim 1, it is characterised in that including：The electricity being connected with the pack of the explosive
Cable, the explosive is suspended in the liquid by the cable, and the cable is used to control the explosive initiation.
3. vibration cementing system as claimed in claim 2, it is characterised in that：The explosive is located in the fluid column of liquid formation
Portion.
4. vibration cementing system as claimed in claim 1, it is characterised in that：Including plug, the plug is arranged on the set
End of the pipe away from the Oil/gas Well well head.
5. a kind of vibration cementing system using described in any one of Claims 1-4 4 carries out vibration cementing method, it is characterised in that
Comprise the following steps：
Sleeve pipe is lowered into precalculated position in Oil/gas Well, annular space is formed between described sleeve pipe and the borehole wall of the Oil/gas Well；
Cement mortar is injected into the annular space；
Liquid is injected into described sleeve pipe；
The tripping in explosive into the liquid；
Control the explosive detonation.
6. vibration cementing method as claimed in claim 5, it is characterised in that：The pack radial dimension of the explosive is set
Less than the radial dimension of described sleeve pipe, so that decoupling charge structure is formed between the explosive and described sleeve pipe, its powder charge
The coefficient of coup is not determined according to the internal pressure strength of described sleeve pipe.
7. vibration cementing method as claimed in claim 6, it is characterised in that：The safe equivalent of the explosive is according to described sleeve pipe
Internal pressure strength determine.
8. vibration cementing method as claimed in claims 6 or 7, it is characterised in that：Using delayed ignition mode, control described fried
Medicine is spaced detonation on schedule.
9. vibration cementing method as claimed in claim 8, it is characterised in that：The predetermined time interval is according to the explosive
Type and coefficient of decoupling charge are determined.
10. vibration cementing method as claimed in claim 5, it is characterised in that：The cement mortar is first injected into sleeve pipe, then
The tripping in plug into described sleeve pipe, then inject into described sleeve pipe liquid, the liquid pushing tow the plug, so that by sleeve pipe
In cement mortar replace into the annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194334.1A CN104806197B (en) | 2015-04-22 | 2015-04-22 | A kind of vibration cementing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194334.1A CN104806197B (en) | 2015-04-22 | 2015-04-22 | A kind of vibration cementing system and method |
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| CN104806197A CN104806197A (en) | 2015-07-29 |
| CN104806197B true CN104806197B (en) | 2017-09-15 |
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| CN201510194334.1A Active CN104806197B (en) | 2015-04-22 | 2015-04-22 | A kind of vibration cementing system and method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555566A (en) * | 2016-12-07 | 2017-04-05 | 中国石油集团西部钻探工程有限公司 | Frangible stratum or the cementing method on broken stratum |
| CN111305780B (en) * | 2020-02-24 | 2021-04-30 | 中国农业大学 | High-pressure gas impact vibration well cementation system and vibration method |
| CN112832718B (en) * | 2021-03-12 | 2022-04-05 | 西南石油大学 | Deep shale gas development method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389742A (en) * | 2001-06-06 | 2003-01-08 | 大庆油田有限责任公司勘探开发研究院 | Seismic blasthole cementing method |
| CN203756116U (en) * | 2013-12-31 | 2014-08-06 | 中国石油化工集团公司 | Vibration cementing device |
-
2015
- 2015-04-22 CN CN201510194334.1A patent/CN104806197B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389742A (en) * | 2001-06-06 | 2003-01-08 | 大庆油田有限责任公司勘探开发研究院 | Seismic blasthole cementing method |
| CN203756116U (en) * | 2013-12-31 | 2014-08-06 | 中国石油化工集团公司 | Vibration cementing device |
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| CN104806197A (en) | 2015-07-29 |
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