CN206158691U - Multi-stage fracturing process pipe column - Google Patents
Multi-stage fracturing process pipe column Download PDFInfo
- Publication number
- CN206158691U CN206158691U CN201621060520.2U CN201621060520U CN206158691U CN 206158691 U CN206158691 U CN 206158691U CN 201621060520 U CN201621060520 U CN 201621060520U CN 206158691 U CN206158691 U CN 206158691U
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- sand
- oil pipe
- mixer
- tubing string
- ball seat
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- 238000000034 method Methods 0.000 title abstract description 18
- 230000008569 process Effects 0.000 title description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 21
- 238000005488 sandblasting Methods 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000037361 pathway Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 28
- 239000007788 liquid Substances 0.000 abstract description 19
- 238000010276 construction Methods 0.000 abstract description 13
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 27
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000003209 petroleum derivative Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a multilayer section fracturing technology tubular column, including oil pipe, safe releasing, sprayer, ball seat, oscillator, sand mixer, oil pipe, packer and the end cap that top-down connected in order, its construction method is: the method comprises the steps of putting the pipe column into a well, aligning an ejector to a target section, throwing a sealing ball from a well mouth, locating the sealing ball on the ball seat, immediately blocking a liquid flow channel below the ball seat, carrying out sand blasting perforation through the ejector, washing out the sealing ball through reverse circulation after the perforation is finished, lifting the pipe column, setting the packer, injecting a high-sand-ratio sand-carrying liquid into an oil pipe at a low discharge rate, injecting a pure liquid into an oil sleeve annulus, repeatedly increasing and reducing the annulus discharge rate to form pulse circulation to control the sand concentration at the well bottom in real time, realizing temporary blocking of the proppant in the seam, instantaneously increasing the net pressure in the seam, further increasing the complexity of the seam, achieving the purpose of increasing the yield of a single well through complex fracture network fracturing, and lifting the pipe column to the next target section after the construction is.
Description
Technical field
The utility model is related to petroleum-gas fiedl multilayer multistage fracturing technique field, is related to a kind of for hyposmosis petroleum-gas fiedl reality
Apply multilayer (section) fracturing technology tubing string and method that complicated seam net pressure break improves well yield.
Background technology
In recent years, to show that the complexity for increasing crack in pressing crack construction process can be effectively improved hypotonic for research both at home and abroad
Petroleum-gas fiedl well yield thoroughly.At present, volume fracturing is the technical way for building complicated seam net, in hydraulic fracturing process
The continuous expansion of intrinsic fracture and brittle rock is set to produce shearing using huge discharge, large sand amount, big liquid measure, the injection mode of low sand ratio
Sliding, forms intrinsic fracture and the interlaced fracture network of man-made fracture, but high using the technology construction cost,
Standby shipwreck degree is big, and it is big to return lifting rate after pressure, the problems such as difficult treatment.And a kind of multi-section multi-layer fracturing technology tubing string and method are adopted,
Can realize that seam inner support agent is temporarily blocked up by relatively low operational discharge capacity, liquid measure, by real-time control shaft bottom sand concentration, instantaneously carry
Net pressure in height seam, reaches increase crack complexity and forms intrinsic fracture and the interlaced fracture network of man-made fracture, real
Now improve the purpose of well yield and ultimate recovery.
The content of the invention
The purpose of this utility model there are provided a kind of inexpensive, low liquid measure to build complicated seam net raising well yield
Process pipe string and method, solving current volume fracturing, to build high, the standby shipwreck degree of complicated seam net construction cost big, and discharge opeing is returned after pressure
Amount is big, the problem of difficult treatment.
In order to achieve the above object, the utility model provides a kind of multi-section multi-layer fracturing technology tubing string, including from top to bottom
The upper oil pipe that is sequentially connected with, safety are given up, injector, ball seat, oscillator, mixer, lower oil pipe, packer and plug.
Described oscillator is Helmholtz's oscillator, from top to bottom by upstream nozzle, vibration cavity and downstream nozzle sequentially
Connection composition.
Described injector arranges perforation.
Described described mixer is provided with pilot sandblasting hole.
The multi-section multi-layer fracturing technology tubing string also includes ball sealer, when ball sealer is seated on ball seat, the passage of mixer
Open, when ball sealer returns out ball seat, the pathway closure of mixer.
The distance between described mixer and packer are more than 5m.
The beneficial effects of the utility model：
The utility model adopts the fracturing integrated tubing string of abrasive perforating, changes liquid outlet channel by throwing ball sealer, in difference
Construction stage adopt different liquid outlet channels：The abrasive perforating stage carries out abrasive perforating using hydraulic blast；The pressure break stage
Make high sand ratio load fluid that strong self-excited vibration is produced in flow process using oscillator, liquid subsequently flows into shaft bottom mulling
Device, is guided by the cyclonic effect that mixer mechanical ports are produced and the high sand ratio injected in oil pipe is taken into sand after fluid cyclone mixing
The liquid Quick uniform of the annular space injection that liquid is formed with oil pipe and sleeve pipe injects stratum after mixing, by changing in work progress
Oil pipe and the annulus fluid discharge capacity real-time control shaft bottom sand concentration of sleeve pipe, realize that proppant fracture is temporarily blocked up, and form complicated seam net,
So as to reach the purpose for improving well yield.Intersegmental employing packer blocks lower floor, and simple structure can meet an instrument and enter
The construction requirement of row multistage pressure break, forces sand fallout to form the lower layer process phase of sand plug packing with the current sealing that artificially causes for adopting
Than packing is relatively reliable, and practical is strong, it is easy to operate.
Description of the drawings
Fig. 1 is a kind of multi-section multi-layer fracturing technology tubing string schematic diagram；
Fig. 2 is multi-section multi-layer fracturing technology tubing string work progress schematic diagram；
Cracking initiation process schematic based on Fig. 3；
Fig. 4 is that forming process schematic diagram is stitched by branch；
Fig. 5 is that forming process schematic diagram is stitched by new branch；
Fig. 6 is complicated seam net pressure work progress schematic diagram.
Description of reference numerals
The upper oil pipes of 1-, 2- give up, oil pipe under 3- injectors, 4- ball seats, 5- oscillators, 6- mixers, 7-, 8- packers,
9- plugs, 10- eyelets, 11- ball sealers, 12- upstream nozzles, 13- vibration cavities, 14- downstream nozzles, 15- pilot sandblasting holes, 16-
Sleeve pipe.
Specific embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
Embodiment 1：
As shown in figure 1, a kind of multi-section multi-layer fracturing technology tubing string, loses including the upper oil pipe 1, safety being sequentially connected with from top to bottom
Hand 2, injector 3, ball seat 4, oscillator 5, mixer 6, lower oil pipe 7, packer 8 and plug 9.
In the present embodiment, by upper oil pipe 1,2, injector 3 of giving up, ball seat 4, oscillator 5, mixer 6, lower oil pipe 7, envelope
Every the device 8 and plug 9 predetermined transformation position of sequently connected tubing string G.I.H from top to bottom；By injector eyelet 10 pairs
Quasi- target phase；From well head input and the corresponding ball sealer 11 of 3 lower end ball seat of injector 4, when ball sealer 11 is seated under injector 3
Closure ball seat following liquid flow path when on the ball seat 4 of end；Abrasive perforating, perforation knot are carried out by the eyelet of hydraulic ejector 3
Ball sealer 11 is washed out return ground by reacting cycle after beam；Given up 2 upper lifting pipe posts by safety, base sealed packer；Injection in oil pipe
High sand ratio load fluid, by the top nozzle 12 of oscillator 5, form vorticity disturbance, this burst of vorticity disturbance is reached produces in vibration chamber 13
The new vorticity disturbance of life, such process obtains constantly repeating to be formed from exciting pulsing jet, is produced from exciting pulse
High sand ratio load fluid Jing under nozzle 14 enter mixer 6 in, by the pilot sandblasting hole 15 of mixer 6 make outlet fluid rotation
In the case of contact with annular space huge discharge liquid, realize in the short time being sufficiently mixed；A kind of down-hole pulse that the utility model is provided
Circulation control sand concentration multi-section multi-layer fracturing string simple structure, practical is strong, it is easy to accomplish.
Embodiment 2：
On the basis of embodiment 1, described injector 3 arranges perforation 10；Described described mixer 6 is provided with
Pilot sandblasting hole 15.The multi-section multi-layer fracturing technology tubing string also includes ball sealer 11, puts into ball seat 4 by ball sealer 11 and returns out
Ball seat 4, realizes the opening and closing of the passage of mixer 6.
Multi-section multi-layer fracturing technology tubing string described in the utility model is the fracturing integrated tubing string of abrasive perforating, by throwing sealing
Ball changes liquid outlet channel, and in the different construction stages different liquid outlet channels is adopted：The abrasive perforating stage adopts hydraulic blast
Carry out abrasive perforating；The pressure break stage is formed the high sand ratio load fluid injected in oil pipe with sleeve pipe using shaft bottom mixer with oil pipe
Annular space injection liquid Quick uniform mixing after inject stratum, in work progress by change annulus fluid discharge capacity control in real time
Sand concentration in shaft bottom processed, realizes that proppant fracture is temporarily blocked up, and forms complicated seam net.Intersegmental employing packer is insulated, Ke Yiman
Time instrument of foot carries out the construction requirement of multistage pressure break.
Embodiment 3：
On the basis of embodiment 1, described oscillator 5 is Helmholtz's oscillator, from top to bottom by upstream nozzle 12,
Vibration cavity 13 and downstream nozzle 14 are sequentially connected with composition.When fluid flows through vibration cavity 13, produce under the modulating action of vibration cavity 13
The current that raw hydraulic pulse then sprays from nozzle surge pressure little when just forming big during pressure, by the change of flow channel shape
Making load fluid collide with downstream impact walls in chamber can produce pressure disturbance formation impulse oscillation, and fluid forms judder
Auto-excitation type pulsing jet.The utility model is mixed by the auto-excitation type impulse oscillation principle that oscillator is produced with mixer eddy flow
Principle makes that load fluid is full and uniform at short notice with annular space neat liquid to be mixed, and can further improve mulling effect, reaches complexity
Seam net pressure break improves the purpose of well yield.
The distance between described mixer and packer are more than 5m.The utility model blocks lower floor, knot using packer
Structure is simple, and can meet instrument carries out the construction requirement of multistage pressure break, with it is current adopt artificially to cause sealing to force de-
Sand forms the lower layer process of sand plug packing and compares, and packing is relatively reliable, and practical is strong, it is easy to operate.
Embodiment 4：
On the basis of above-described embodiment, the construction method of the multi-section multi-layer fracturing technology tubing string is comprised the following steps：
Step one, by upper oil pipe 1, safe 2, injector 3 of giving up, ball seat 4, oscillator 5, mixer 6, lower oil pipe 7, packing
From top to bottom sequently connected multi-section multi-layer fracturing technology tubing string loads sleeve pipe 16 and G.I.H is predetermined for device 8 and plug 9
Transformation position；
Step 2, by the alignment target section of injector 3；
Step 3, from well head the ball sealer 11 for setting mixer 6 is put into, and ball sealer 11 is seated in the lower end of injector 3
On ball seat 4；
Step 4, from upper oil pipe 1 perforation load fluid is injected, and the load fluid carries out waterpower by the perforation of injector 3
Abrasive perforating operation, perforation carries out crack initiation test after terminating；
Step 5, by annular space injection reacting cycle passage is set up, and reacting cycle washes out ball sealer 11, is opened mixer 6 and is led to
Road；
Step 6, is given up 2 upper lifting pipe posts by safety, mixer 6 is above carried to 5～10m of perforated interval top；
Step 7, base sealed packer 8；
Step 8, oil pipe is with 0.6～2m3The discharge capacity injection high sand ratio load fluid of/min, oil pipe injects with the annular space of sleeve pipe 16
Neat liquid, stratum is injected after mixer 6 quickly mixes high sand ratio load fluid with oil jacket annulus fluid carries out pressure break (as schemed
Shown in 2), and form pulse cycle, real-time control using first improving the step of reducing by 16 annular space discharge capacity of oil pipe and sleeve pipe afterwards repeatedly
Shaft bottom sand concentration, realizes that seam inner support agent is temporarily blocked up, and gradually forms complicated seam net, instantaneous to improve net pressure in seam, realizes down-hole
Pulse cycle control sand concentration pressing crack construction；
Step 9, deblocking packer 8 is carried to next target phase repeat step 2-8 on tubing string and constructed.
Preferably, the discharge capacity of the reacting cycle passage described in step 5 is 0.3m3/min。
Preferably, the concentration of the high sand ratio load fluid described in step 8 is 1200～1800kg/m3。
Preferably, the oil pipe described in step 8 is 4～10m with the annular space discharge capacity that sleeve pipe is formed3/min。
Complex fracture forming process is as follows：
The low discharge capacity of oil pipe injects high sand ratio load fluid, oil pipe and the annular space of sleeve pipe 16 injection huge discharge neat liquid, by mulling
Device 6 make high sand ratio load fluid quickly mix with annulus fluid after inject stratum carry out pressure break (as shown in Figure 2), when fracture extension extremely
After certain length (as shown in Figure 3), the annular space discharge capacity that oil pipe is formed with sleeve pipe 16 is reduced, improve the sand of load fluid in injection crack
Concentration, realizes that the agent of seam inner support is temporarily stifled so as to form branch's seam (as shown in Figure 4)；Improving annulus fluid discharge capacity reduces injection crack
The sand concentration of interior load fluid, makes crack continue to reduce annular space discharge capacity after extending again, and the sand for improving load fluid in injection crack is dense
Degree, by stitching, inner support agent is temporarily stifled to form new branch's seam (as shown in Figure 5)；Improving annulus fluid discharge capacity reduces in injection crack
The sand concentration of load fluid, repeats said process and realizes complicated seam net pressure construction (as shown in Figure 6).
Claims (6)
1. a kind of multi-section multi-layer fracturing technology tubing string, it is characterised in that：Including the upper oil pipe (1), safety that are sequentially connected with from top to bottom
Give up (2), injector (3), ball seat (4), oscillator (5), mixer (6), lower oil pipe (7), packer (8) and plug (9).
2. a kind of multi-section multi-layer fracturing technology tubing string according to claim 1, it is characterised in that：Described oscillator (5) is
Helmholtz's oscillator, is sequentially connected with and is constituted by upstream nozzle (12), vibration cavity (13) and downstream nozzle (14) from top to bottom.
3. a kind of multi-section multi-layer fracturing technology tubing string according to claim 1, it is characterised in that：Described injector (3) sets
It is equipped with eyelet (10).
4. a kind of multi-section multi-layer fracturing technology tubing string according to claim 1, it is characterised in that：Described described mixer
(6) it is provided with pilot sandblasting hole (15).
5. a kind of multi-section multi-layer fracturing technology tubing string according to claim 1, it is characterised in that：It also includes ball sealer
(11) when, ball sealer (11) is seated on ball seat (4), the passage of mixer (6) is opened, when ball sealer (11) returns out ball seat (4),
The pathway closure of mixer (6).
6. a kind of multi-section multi-layer fracturing technology tubing string according to claim 1, it is characterised in that：Described mixer (6) with
The distance between packer (8) is more than 5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621060520.2U CN206158691U (en) | 2016-09-18 | 2016-09-18 | Multi-stage fracturing process pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621060520.2U CN206158691U (en) | 2016-09-18 | 2016-09-18 | Multi-stage fracturing process pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158691U true CN206158691U (en) | 2017-05-10 |
Family
ID=58651707
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621060520.2U Active CN206158691U (en) | 2016-09-18 | 2016-09-18 | Multi-stage fracturing process pipe column |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337673A (en) * | 2016-09-18 | 2017-01-18 | 中国石油天然气股份有限公司 | Multi-layer fracturing process pipe column and construction method thereof |
| CN110259425A (en) * | 2019-05-24 | 2019-09-20 | 北京建筑大学 | A kind of test water, which forces, splits injection-tube |
-
2016
- 2016-09-18 CN CN201621060520.2U patent/CN206158691U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337673A (en) * | 2016-09-18 | 2017-01-18 | 中国石油天然气股份有限公司 | Multi-layer fracturing process pipe column and construction method thereof |
| CN110259425A (en) * | 2019-05-24 | 2019-09-20 | 北京建筑大学 | A kind of test water, which forces, splits injection-tube |
| CN110259425B (en) * | 2019-05-24 | 2021-04-23 | 北京建筑大学 | Hydraulic fracturing injection tube for test |
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