CN106639992A - Special perforating gun for fracturing, special FracGun composite perforating device and method for fracturing - Google Patents
Special perforating gun for fracturing, special FracGun composite perforating device and method for fracturing Download PDFInfo
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- CN106639992A CN106639992A CN201710141556.6A CN201710141556A CN106639992A CN 106639992 A CN106639992 A CN 106639992A CN 201710141556 A CN201710141556 A CN 201710141556A CN 106639992 A CN106639992 A CN 106639992A
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- perforating
- gun
- pressure break
- special
- fracturing
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000004576 sand Substances 0.000 claims description 42
- 239000000843 powder Substances 0.000 claims description 26
- 238000010304 firing Methods 0.000 claims description 25
- 238000005086 pumping Methods 0.000 claims description 15
- 239000003721 gunpowder Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims description 2
- 229940079593 drug Drugs 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000001360 synchronised effect Effects 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
- E21B43/117—Shaped-charge perforators
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention particularly relates to a special perforating gun for fracturing, a special FracGun composite perforating device and method for fracturing. The improvement of the perforating gun is as follows: at least two perforating bullets (7) are mounted in each phase position in a gun carrier tube (3); blind holes (9) in one-to-one correspondence to the perforating bullets (7) are formed in each phase position of a gun body (1). Meanwhile, the invention further provides the special FracGun composite perforating device using the pressure of the perforating gun and a fracturing method thereof. By virtue of the invention, not only is the cost of a high-pressure operation during fracturing lowered, but also the safety is further guaranteed.
Description
Technical field
The invention belongs to oil-gas exploration and development field, the special perforating gun of more particularly to a kind of pressure break, pressure break are special
FracGun composite perforators and method.
Background technology
As oil-gas field development enters the later stage, the needs of oil field production capacity exploitation, pressure cannot be met using perforation completion
The major way that completion increasingly becomes oil field development is split, and perforation progressively becomes the pretreatment of pressure break completion.
But due to the firing mount hole rotation distribution in traditional perforator, two synchronous pitchs of holes are larger, pressure during pressure break
The only sufficiently large fracture pressure more than bottom could produce crack, and its result is that well head pressure is often very high, operations involving high pressure one
Aspect is relatively costly, and the potential safety hazard of another aspect work progress is larger.Simultaneously gunpowder exploding gas make the crack that rock is produced
There is closure tendency by the effect of strata pressure, have impact on the construction of follow-up pressure break.
The content of the invention
Operations involving high pressure is relatively costly during pressure break in existing perforating technology in order to solve background technology, potential safety hazard is larger
Problem, the present invention provides the special FracGun composite perforators of a kind of special perforating gun of pressure break, pressure break and method.
The present invention is achieved through the following technical solutions：
Introduce first, the special perforating gun of pressure break proposed by the present invention, including the body of a gun, locating ring, firing mount pipe, gun breech,
Primacord, pressure break gunpowder, perforating bullet and pipette tips；Its improvements is：At least 2 are installed on the firing mount pipe in each phase place
Perforating bullet；The body of a gun each phase place is provided with and the one-to-one blind hole of perforating bullet.
Wherein, at least 2 perforating bullets in each phase place both can be arranged side by side along the axial direction of firing mount pipe or might be used also
It is arranged side by side with the radial direction along firing mount pipe, under normal circumstances using along firing mount pipe axial direction arrangement.
Preferably, above-mentioned blind hole is step blind hole.
Preferably, the pressure break gunpowder set-up mode of the special perforating gun of above-mentioned pressure break is powder charge or perforating gun between perforating bullet
Interior multiple charge；The knot that the locating ring is exchanged using TCP and pumping perforation split structure or using TCP and pumping perforation
Structure.
According to the special perforating gun of above-mentioned pressure break, present invention also offers the special FracGun composite perforators of pressure break, including
Detonator, the top connection being sequentially connected in series, upper pressure break powder column, upper crossover sub, perforating gun, lower crossover sub, fracturing powder column and
Lower contact；
The perforating gun includes the body of a gun, locating ring, firing mount pipe, gun breech, primacord, pressure break gunpowder, perforating bullet and pipette tips；
The detonator has three sections；Wherein two sections are located in upper crossover sub and lower crossover sub respectively, and quick-fried by leading
Rope connects；Another section is arranged in lower contact；
Its improvements is：At least 2 perforating bullets are installed on the firing mount pipe in each phase place；The body of a gun each phase place
It is provided with and the one-to-one blind hole of perforating bullet.
In order that formation fracture is present all the time, need will to fill in stratum fracturing sand, thus the perforating system also include with
The fracturing sand assembly of lower contact connection；Fracturing sand assembly includes sand cylinder, fracturing sand and gun breech of giving up；One end of sand cylinder and fracturing
Powder column connects, and the other end is connected with gun breech of giving up；Fracturing sand is filled in sand cylinder.
Wherein, at least 2 perforating bullets in each phase place both can be arranged side by side along the axial direction of firing mount pipe or might be used also
It is arranged side by side with the radial direction along firing mount pipe, under normal circumstances using along firing mount pipe axial direction arrangement.
Preferably, above-mentioned blind hole is step blind hole.
Preferably, the pressure break gunpowder set-up mode of the special perforating gun of above-mentioned pressure break is powder charge or perforating gun between perforating bullet
Interior multiple charge；The knot that the locating ring is exchanged using TCP and pumping perforation split structure or using TCP and pumping perforation
Structure.
Despised based on the structure of the above-mentioned FracGun composite perforator special to pressure break, now to the pressure break side of the device
Method is sketched, and its concrete grammar is comprised the following steps：
1) the special FracGun composite perforators of pressure break are transferred to the sleeve pipe of down-hole；
2) detonator in lower contact, the shear pin that detonator shearing is given up on gun breech is excited to lose first in perforating gun operation
Pistol tail comes off, and fracturing sand is excluded from sand cylinder, and fracturing sand is suspended in the annular space of pipe string and sleeve pipe after discharging；
3) the special FracGun composite perforators position of pressure break is adjusted, makes perforating gun and annular fracturing sand be in perforation
Interval；
4) detonate perforating gun, upper pressure break powder column and fracturing powder column, each idiomorphism of multi-openings bullet on perforating gun single-phase
Into multiple continuous perforation tunnel, each self-forming crack in each phase place；Due to going up pressure break powder column simultaneously in perforating gun perforation
Also it is excited with fracturing powder column, in the special FracGun composite perforators of whole pressure break and casing annulus high pressure gas is formed
Body, forms envelope pressure in the gases at high pressure short time to perforating gun interval, is suspended in annular space fracturing sand in the presence of gases at high pressure
Into in formation fracture, the closure in crack is hindered.
Beneficial effects of the present invention：
1st, perforating gun of the invention, perforating system adopt the arrangement of many perforating bullets of single-phase, and multi-openings bullet is each
The multiple continuous perforation tunnel for being formed, on stratum stress concentration is formed, and high temperature produced by composite propellant detonation is high in perforating gun
Calm the anger under body pressure break, each self-forming crack in each phase place, concurrent fracturing crack greatly reduces the fracture pressure of bottom,
The cost of operations involving high pressure, security have also been ensured when not only reducing pressure break.
2nd, the present invention increases fracturing sand assembly using perforating system so that the formation fracture that multi-openings bullet is produced is deposited all the time
, it is ensured that the oil of down-hole smoothly flows out.
3rd, because the first paragraph for pumping perforation is TCP techniques, current TCP locating rings are to change increasing in pumping technology positioning
Plus a plug or TCP locating rings are replaced with, and high cost and management difficulty is big, the locating ring of the present invention is penetrated using TCP and pumping
Hole split structure or the structure exchanged using TCP and pumping perforation, overcome above-mentioned problem.
Description of the drawings
Fig. 1 is the structural representation of the special perforating gun of pressure break；
Fig. 2 is the structural representation of the special FracGun composite perforators of pressure break.
Reference is as follows：
The 1- body of a guies, 2- locating rings, 3- firing mount pipes, 4- gun breeches, 5- primacords, 6- pressure break gunpowder, 7- perforating bullets, 8- pipette tips,
9- blind holes, 10- detonators, 11- top connections, crossover sub under crossover sub, 14- perforating guns, 15- on the upper pressure break powder column 13- of 12-,
16- fracturing powder columns, 17- lower contacts, 18- fracturing sand assemblies, 19- sand cylinders, 20- fracturing sands, 21- are given up gun breech.
Specific embodiment
As shown in figure 1, the invention provides a kind of special perforating gun of pressure break, the perforating gun includes the body of a gun 1, locating ring 2, bullet
Frame pipe 3, gun breech 4, primacord 5, pressure break gunpowder 6, perforating bullet 7 and pipette tips 8；
The improvements of the perforating gun are：
At least 2 perforating bullets 7 are installed on firing mount pipe 3 in each phase place；The body of a gun 1 each phase place is provided with and perforating bullet
7 one-to-one blind holes.
At least 2 perforating bullets wherein in each phase place are arranged side by side or along firing mount pipe along the axial direction of firing mount pipe
Radially it is arranged side by side, and when in underground work, it is desirable to the stratum of 1m length in same direction, the duct number of perforating bullet does not surpass
16 are crossed, if greater than this numeral, perforating gun can produce deformation after perforation.
Due to down-hole limited space, should ensure occur the crack of perforation in stratum, again consider actual production can be real
Shi Xing, the quantity of the perforating bullet 7 of the perforating gun is 2-4, and the quantity of the corresponding blind hole of its perforating bullet (or step blind hole) is 2-4
It is individual.
Pressure break gunpowder set-up mode is multiple charge in powder charge between perforating bullet or perforating gun, can be according to the difference of operation
Requirement carries out powder charge.
Because the first paragraph for pumping perforation is TCP techniques, current TCP locating rings are to change increase in pumping technology positioning
One plug is replaced with TCP locating rings, and high cost and management difficulty are big, and locating ring 2 is using TCP and pumping perforation split knot
Structure or the structure exchanged using TCP and pumping perforation.
According to the special perforating gun of above-mentioned pressure break, present invention also offers the special FracGun composite perforators of pressure break, such as scheme
Shown in 2, top connection 11, upper pressure break medicine that the perforating system includes detonator 10, is sequentially connected in series according to the top-down direction of oil well
Post 12, upper crossover sub 13, perforating gun 14, lower crossover sub 15, fracturing powder column 16 and lower contact 17；
The body of a gun 1, locating ring 2, firing mount pipe 3, gun breech 4, primacord 5, pressure break gunpowder 6, perforating bullet 7 and pipette tips 8；
Detonator 10 has three sections；Wherein two sections are located at respectively in upper crossover sub 13 and lower crossover sub 15, and by leading
Quick-fried rope 5 connects；Another section is arranged in lower contact 17；
At least 2 perforating bullets 7 are installed on firing mount pipe 3 in each phase place；The body of a gun 1 each phase place is provided with and perforating bullet
7 one-to-one blind holes.
In order that formation fracture is present all the time, need will to fill in stratum fracturing sand, thus the perforating system also include with
The fracturing sand assembly 18 of lower contact connection；Fracturing sand assembly 18 includes sand cylinder 19, fracturing sand 20 and gun breech 21 of giving up；Sand cylinder 19
One end is connected with fracturing powder column 16, and the other end is connected with gun breech 21 of giving up；Fracturing sand 20 is filled in sand cylinder 19.
According to the above-mentioned description to perforating system structure, now its method of work is sketched：
Step 1) the special FracGun composite perforators of pressure break are transferred to the sleeve pipe of down-hole；
Step 2) excite detonator in lower contact, the shearing that detonator shearing is given up on gun breech first in perforating gun operation
Pin, gun breech of giving up comes off, and fracturing sand is excluded from sand cylinder, due to the fracturing sand and well killing fluid matched design, after fracturing sand is discharged
It is suspended in the annular space of pipe string and sleeve pipe；
Step 3) the special FracGun composite perforators position of adjustment pressure break, it is in perforating gun and annular fracturing sand
Perforated zone；
Step 4) detonate perforating gun, upper pressure break powder column and fracturing powder column, and the multi-openings bullet on perforating gun single-phase is each
The multiple continuous perforation tunnel of self-forming, each self-forming crack in each phase place；Due to going up pressure break simultaneously in perforating gun perforation
Powder column and fracturing powder column are also excited, and its pressure peak and effective pressure duration are above what gunpowder in perforating gun was formed
Pressure peak and effective pressure action time, when pressure break perforating gun forms crack, to perforating gun interval in the gases at high pressure short time
Envelope pressure is formed, fracturing sand in annular space is suspended in and is entered in formation fracture in the presence of gases at high pressure, hinder the closure in crack.
When subsequently carrying out hydraulic fracturing, due to the special perforating gun gun-shaped of pressure break into crack, make pressure break pump pressure reduce it is bright
Aobvious, its result is that pressure break cost reduces, while the degree of danger of hydraulic fracturing job process is reduced, fracturing effect is significantly improved.
Claims (10)
1. the special perforating gun of a kind of pressure break, including the body of a gun (1), locating ring (2), firing mount pipe (3), gun breech (4), primacord (5), pressure
Split gunpowder (6), perforating bullet (7) and pipette tips (8)；It is characterized in that：At least 2 are installed on the firing mount pipe (3) in each phase place
Individual perforating bullet (7)；Described each phase place of the body of a gun (1) is provided with and the one-to-one blind hole (9) of perforating bullet (7).
2. the special perforating gun of pressure break according to claim 1, it is characterised in that：At least 2 perforating bullets in each phase place
It is arranged side by side along the axial direction of firing mount pipe or is arranged side by side along the radial direction of firing mount pipe.
3. the special perforating gun of pressure break according to claim 1 and 2, it is characterised in that：The blind hole (9) is step blind hole.
4. the special perforating gun of pressure break according to claim 1, it is characterised in that：The pressure break fire of the special perforating gun of the pressure break
Medicine (6) set-up mode is multiple charge in powder charge between perforating bullet (7) or perforating gun；The locating ring (2) is using TCP and pump
The structure sent perforation split structure or exchanged using TCP and pumping perforation.
5. the special FracGun composite perforators of a kind of pressure break, including detonator (10), the top connection being sequentially connected in series (11), on
Pressure break powder column (12), upper crossover sub (13), perforating gun (14), lower crossover sub (15), fracturing powder column (16) and under connect
Head (17)；
The perforating gun (14) includes the body of a gun (1), locating ring (2), firing mount pipe (3), gun breech (4), primacord (5), pressure break gunpowder
(6), perforating bullet (7) and pipette tips (8)；
The detonator (10) has three sections；Wherein two sections are located in upper crossover sub (13) and lower crossover sub (15) respectively, and
Connected by primacord (5)；Another section is arranged in lower contact (17)；
It is characterized in that：At least 2 perforating bullets (7) are installed on the firing mount pipe (3) in each phase place；The body of a gun (1) each
Phase place is provided with and the one-to-one blind hole (9) of perforating bullet (7).
6. special FracGun composite perforators of pressure break according to claim 5, it is characterised in that：Also include with
The fracturing sand assembly (18) of joint connection；Fracturing sand assembly (18) includes sand cylinder (19), fracturing sand (20) and gun breech of giving up (21)；
One end of sand cylinder (19) is connected with fracturing powder column (16), and the other end is connected with gun breech of giving up (21)；Fracturing sand (20) is filled in
In sand cylinder (19).
7. special FracGun composite perforators of pressure break according to claim 6, it is characterised in that：In each phase place
At least 2 perforating bullets be arranged side by side along the axial direction of firing mount pipe or be arranged side by side along the radial direction of firing mount pipe.
8. the special perforating gun of pressure break according to claim 7, it is characterised in that：The blind hole is step blind hole.
9. special FracGun composite perforators of pressure break according to claim 8, it is characterised in that：The pressure break is special
It is multiple charge in powder charge between perforating bullet (7) or perforating gun with pressure break gunpowder (6) set-up mode of perforating gun；The positioning
The structure that ring (2) is exchanged using TCP and pumping perforation split structure or using TCP and pumping perforation.
10. the pressure break side based on the special FracGun composite perforators of the pressure break described in claim 6-9 any claim
Method, it is characterised in that comprise the following steps：
1) the special FracGun composite perforators of pressure break are transferred to the sleeve pipe of down-hole；
2) detonator in lower contact, the shear pin that detonator shearing is given up on gun breech, rifle of giving up are excited first in perforating gun operation
Tail comes off, and fracturing sand is excluded from sand cylinder, and fracturing sand is suspended in the annular space of pipe string and sleeve pipe after discharging；
3) the special FracGun composite perforators position of pressure break is adjusted, makes perforating gun and annular fracturing sand be in perforated zone；
4) detonate perforating gun, and the multi-openings bullet on perforating gun single-phase forms multi-openings duct, so as to form crack；Simultaneously
Pressure break powder column and fracturing powder column are excited, is formed in the special FracGun composite perforators of whole pressure break and casing annulus
Gases at high pressure, form envelope pressure in the gases at high pressure short time to perforating gun interval, are suspended in annular space fracturing sand in gases at high pressure
Effect is lower to be entered in formation fracture, hinders crack closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141556.6A CN106639992B (en) | 2017-03-10 | 2017-03-10 | Fracturing method of FracJun composite perforating device special for fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141556.6A CN106639992B (en) | 2017-03-10 | 2017-03-10 | Fracturing method of FracJun composite perforating device special for fracturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106639992A true CN106639992A (en) | 2017-05-10 |
| CN106639992B CN106639992B (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710141556.6A Active CN106639992B (en) | 2017-03-10 | 2017-03-10 | Fracturing method of FracJun composite perforating device special for fracturing |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318723A (en) * | 2019-07-18 | 2019-10-11 | 中国石油集团渤海钻探工程有限公司 | The intelligent fracturing tool of bottom section |
| CN112780204A (en) * | 2019-11-07 | 2021-05-11 | 中国石油天然气股份有限公司 | Releasing device and releasing method |
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