CN107401401A - A kind of horizontal well explosion fracturing modernization system and method - Google Patents
A kind of horizontal well explosion fracturing modernization system and method Download PDFInfo
- Publication number
- CN107401401A CN107401401A CN201610339097.8A CN201610339097A CN107401401A CN 107401401 A CN107401401 A CN 107401401A CN 201610339097 A CN201610339097 A CN 201610339097A CN 107401401 A CN107401401 A CN 107401401A
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- Prior art keywords
- gun
- bear
- horizontal well
- bear gun
- central tube
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Classifications
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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
- 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
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
Abstract
The present invention proposes a kind of horizontal well explosion fracturing modernization system and method.The system includes conveying oil pipe, screen casing, initiator and the bear gun being sequentially connected, wherein, the central tube being connected with initiator is provided with bear gun, and the ignition charge for igniting bear gun is provided with central tube.New fracture network can be formd around pit shaft and primary fissure seam using the system, improve stratum filtration condition, recover and improve the poorly efficient well capacity of low yield.
Description
Technical field
The present invention relates to oil-gas field development technical field, particularly a kind of horizontal well explosion fracturing modernization system and side
Method.
Background technology
At present, horizontal well in segments pressure is taken in the exploitation for untraditional reservoirs such as tight sand, shale mostly
Split technology.While yield is improved using horizontal well, there is also many low yields, poorly efficient horizontal well.And in order to
Improve yield, it is necessary to raw water horizontal well is carried out to repeat transformation.
In the prior art, raw water horizontal well can be carried out repeating hydraulic fracturing, with well yield of improving the standard.But
It is that repetition hydraulic fracturing to raw water horizontal well is restricted by completion mode, crustal stress states and primary fracture, transforms
Difficulty is big, it is difficult to forms new crack, influences to repeat correctional effect.
The content of the invention
For some or all of of the above-mentioned technical problem in the presence of prior art, the present invention proposes one kind
Horizontal well explosion fracturing modernization system and method.Can be with applying solid gunpowder high energy material by the system and method
The horizontal well poorly efficient to low yield after hydraulic fracturing carries out repeating transformation.So as in horizontal well long well section crack and pit shaft
Place forms seam net.Meanwhile this horizontal well explosion fracturing modernization system and method can help to eliminate perforation compacting
Band and various contamination and pluggings, improve the seepage flow condition of crack and nearly pit shaft surrounding formation, recover the production of low yield inefficient well
While energy, reduce and repeat improvement cost.
According to an aspect of the invention, it is proposed that a kind of horizontal well explosion fracturing modernization system, including：Connect successively
Conveying oil pipe, screen casing, initiator and the bear gun connect, wherein, it is provided with bear gun and is connected with initiator
Central tube, and be provided with central tube the ignition charge for igniting bear gun.
In one embodiment, including multiple bear gun, and it is provided with interlayer between two adjacent bear gun
Rifle, central tube extend in each bear gun and interlayer gun.
In one embodiment, be provided with relief hole in the bear gun, and the axis of the relief hole with
The axis of the bear gun is in the first angle.
In one embodiment, first angle is 35-55 degree.
In one embodiment, delay dividing plate explosion propagation device is set in central tube.
In one embodiment, damper is set in the upstream of screen casing.
In one embodiment, school depth orientation spool is set in the upstream of at least one damper.
According to another aspect of the invention, it is proposed that a kind of method of horizontal well explosion fracturing transformation, including it is following
Step：
Step 1, it is determined that transformation interval, and original hydraulic fracture is positioned,
Step 2, the tripping in horizontal well explosion fracturing modernization system into pit shaft, and bear gun is corresponded to initial condition
Power crack,
Step 3, oil pipe annular space is closed,
Step 4, bear gun is ignited by initiator, and open oil pipe annular space.
In one embodiment, in step 3, before oil pipe annular space is closed, it is also necessary to filled it up with into pit shaft
Pressure gear liquid.
In one embodiment, in step 1, can in the wellbore tripping in school depth logging truck to position original waterpower
Crack, and school depth logging truck can coordinate with school depth orientation spool.
Compared with prior art, can be by level it is an advantage of the current invention that in horizontal well repeats transformation process
Well explosion fracturing modernization system is lowered into raw water horizontal well, to cause bear gun to be directed at the crack of former hydraulic fracturing,
And carry out repeating transformation using the solid gunpowder high energy material horizontal well poorly efficient to low yield after hydraulic fracturing.In pressure break
In rifle blast process, new fracture network is formd around pit shaft and primary fissure seam, improves stratum filtration condition,
Recover and improve the poorly efficient well capacity of low yield.Simultaneously as in horizontal well repeats transformation process, gunpowder is quick-fried
The fried heat chemistry effect formed can eliminate perforation compaction band and various contamination and pluggings, further improve the seepage flow on stratum
Condition, improve oil and gas production.
Brief description of the drawings
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing, in figure：
Fig. 1 shows horizontal well explosion fracturing modernization system according to an embodiment of the invention；
Fig. 2 shows the A-A profiles from Fig. 1；
Accompanying drawing is not drawn according to the ratio of reality.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 shows the horizontal well explosion fracturing modernization system 100 according to the present invention.It is as shown in figure 1, horizontal
Well explosion fracturing modernization system 100 includes conveying oil pipe 1, screen casing 2, initiator 3 and the pressure break being sequentially connected
Rifle 4.The central tube 5 being connected with initiator 3 is provided with bear gun 4, and is set in central tube 5
There is the ignition charge for igniting bear gun 4.Wherein, conveying oil pipe 1 mainly play connection function, by screen casing 2,
Initiator 3 and bear gun 4 etc. are lowered into the pit shaft of horizontal well.Screen casing 2 is used to lose heart, and is released with playing pressure
Put, protect the effect of other devices and stabilizing borehole.Initiator 3 explodes for actuating bear gun 4.Pass through
Central tube 5 is set and places ignition charge, and ensures the transmission of heat, so as to ignite bear gun 4.
When carrying out fractured horizontal well repetition transformation, horizontal well explosion fracturing modernization system 100 is lowered into level
In well, and make bear gun 4 corresponding with former hydraulically created fracture.By initiator 3 and ignition charge by bear gun
4 ignite.In the blast process of bear gun 4, new fracture network is formd around pit shaft and primary fissure seam, is changed
It has been apt to stratum filtration condition, has recovered and improve the poorly efficient well capacity of low yield.Simultaneously as repeated in horizontal well
In transformation process, the heat chemistry effect that gunpowder explosion is formed can eliminate perforation compaction band and various contamination and pluggings, can
Further improve the seepage flow condition on stratum, improve oil and gas production.Also, screen casing 2 serves pressure release effect.
It is exactly while avoiding blast excessive to the impact of upstream device by setting screen casing 2, to also act the protection borehole wall
Effect, improve repetition transformation operation security.
In one embodiment, horizontal well explosion fracturing modernization system 100 includes multiple bear gun 4.Pass through this
Kind is set, and horizontal well explosion fracturing modernization system 100 can be waded acroos a river by tripping in one to realize the transformation of whole horizontal well,
So as to improve operating efficiency, running cost has been saved.Meanwhile set between two adjacent bear gun 4
There is interlayer gun 6, and central tube 5 extends in each bear gun 4 and interlayer gun 6, to ensure that ignition charge can not
It is blocked.It is, central tube 5 is provided with each bear gun 4 and interlayer gun 6, and in central tube 5
Interior placement ignition charge, to inspire multiple bear gun 4 using an initiator 3.Wherein, interlayer gun 6 plays
The effect of connection bear gun 4.Meanwhile interlayer gun 6 also plays protection central tube 5, buffers adjacent pressure
Split the effect of the fracture pressure of rifle 4.It should be noted that two bear gun 4 have schematically been drawn in Fig. 1,
But the application does not limit the quantity of bear gun 4.
According to the present invention, the inside and outside relief hole 7 connected is provided with the wall of bear gun 4.Also, bear gun
Multiple relief holes 7 are may be provided with 4 wall.According to the present invention, relief hole 7 is inclined hole, as shown in Figure 2.
It is, the axis of relief hole 7 and the axis of bear gun 4 are in the first angle α.It is, relief hole 7
Axis is not vertical with the axis of bear gun 4, and cause explosion and caused pressure is not perpendicular to bear gun 4
Axis, but upstream direction deflection.Explosion can be reduced by this set to change horizontal well explosion fracturing
The impulsive force of system 100 is made, and ensures the safety of horizontal well explosion fracturing modernization system 100.Preferably,
One angle α is 35-55 degree.For example, the first angle that the axis of the axis of bear gun 4 and relief hole 7 is in
For 45 degree, 35 degree or 55 degree.According to a preferred embodiment of the present invention, the axis of bear gun 4 and pressure release
The axis in hole 7 is in the intersecting downstream of relief hole 7, that is, in fig. 2, the left side is upstream and the right is downstream.
By this set can detonation air pressure towards updrift side, horizontal well explosion fracturing is changed with reducing explosion
The impulsive force of system 100 is made, ensures the safety of horizontal well explosion fracturing modernization system 100, meanwhile, ensure water
The safety of horizontal well.
According to the present invention, delay dividing plate explosion propagation device (not shown) is set in central tube 5.In level
When there are multiple bear gun 4 in well explosion fracturing modernization system 100, dividing plate explosion propagation device is set to control
The blast opportunity of different bear gun 4.By setting delay dividing plate explosion propagation device to help to control bear gun 4
Detonation peak pressure, avoid explosion energy it is excessive caused by pressure superposition phenomenon.It should be noted that blast
The design principle of surge pressure is above the dynamic fracture pressure on corresponding stratum, and yield limit less than stratum and
The dynamic pressure-bearing limit of sleeve pipe.For example, the dynamic fracture pressure on stratum is 48MPa, and the yield limit on stratum
The dynamic pressure-bearing limit for 66MPa, while sleeve pipe is 75MPa, then detonation peak pressure can be more than 48MPa
And it is less than 66MPa.And in order to there is more preferable efficiency, detonation peak should also be closer to the yield limit on stratum.
For example, detonation peak can be 60MPa.
In order to protect conveying oil pipe 1, damper 8 is set in the upstream of screen casing 2.And in order to improve damping effect,
Multiple dampers 8 can be set with tandem, for example, 2,3,4 or more.By this set,
Impact of the detonation pressure to conveying oil pipe 1 is reduced, the safety for the conveying oil pipe 1 that adequately protected.
Further, one section of wall thickness of the conveying oil pipe 1 that the damper 8 with most upstream is connected can also be added
Thickness, it is, setting one section of heavy wall tubing 9 in the upstream end of the damper 8 of most upstream.This heavy wall tubing 9
Length be 20-30 rice.For example, the length of heavy wall tubing 9 is 25 meters.
According to the invention, it is further possible to school depth orientation spool 10 is set in the upstream of at least one damper 8.For example,
As shown in Figure 1, school depth orientation spool 10 is arranged between two dampers 8.In tripping in horizontal well detonation
, can be by tripping in school depth logging truck (not shown), with to former hydraulic fracture before fracturing reform system 100
Positioned.And during tripping in horizontal well explosion fracturing modernization system 100, pass through school depth orientation spool 10
Coordinate with school depth logging truck, so as to the accurate location of restriction level well explosion fracturing modernization system 100.Therefore,
By set school depth orientation spool 10 can Precise Position System 100 position so that bear gun 4 just corresponds to
Former hydraulic fracture, to improve correctional effect.In addition, high-ranking officers' depth orientation spool 10 is arranged on the upper of damper 8
Trip, avoids school depth orientation spool 10 from bearing excessive impact, protects its safety in utilization.
Preferably, initiator 3 is pressure detonator, to cause under pressure, can inspire initiator.
The invention also provides a kind of horizontal well explosion fracturing remodeling method.Water is described in detail below according to Fig. 1
Horizontal well explosion fracturing remodeling method.
First, the transformation interval of horizontal well is determined.And initial condition power crack is positioned by tripping in school depth logging truck
Particular location.
Then, the tripping in horizontal well explosion fracturing modernization system 100 into pit shaft.During tripping in, pass through school
Deep orientation spool 10 coordinates with school depth logging truck, and determines the particular location of system 100.It is, need
So that bear gun 4 is set to correspond to original hydraulic fracture.
Again, pressure gear liquid is filled it up with into pit shaft, and closes oil pipe annular space.Can by filling pressure gear liquid into pit shaft
To reduce impact of the blast pressure to system 100, the borehole wall and ground installation, so as to improve processing safety.
It is again secondary, pressurizeed to initiator 3, to inspire initiator 3 and ignite bear gun 4 by initiator 3.It
Afterwards, oil pipe annular space is opened.
Further, after bear gun 4 is detonated successively, the reaction of well head is observed, then wait for quietly a period of time (for example,
30 minutes).
Finally, transformation is completed, and can play out system 100.
In this application, orientation term " upstream ", " downstream " are with horizontal well explosion fracturing modernization system 100
Real work position be reference.
The preferred embodiment of the present invention is the foregoing is only, but the scope of the present invention is not limited thereto, and is appointed
What those skilled in the art easily can be changed or change in technical scope disclosed by the invention, and
This be altered or varied should all be included within the scope of the present invention.Therefore, protection scope of the present invention should
It is defined by the protection domain of claims.
Claims (10)
- A kind of 1. horizontal well explosion fracturing modernization system, it is characterised in that including：The conveying oil being sequentially connected Pipe, screen casing, initiator and bear gun, wherein, it is provided with what is be connected with the initiator in the bear gun Central tube, and it is provided with the central tube ignition charge for igniting the bear gun.
- 2. system according to claim 1, it is characterised in that including multiple bear gun, and two Interlayer gun is provided between the adjacent bear gun, the central tube is in each bear gun and the interlayer gun Interior extension.
- 3. system according to claim 1 or 2, it is characterised in that be provided with the bear gun Relief hole, and the axis of the relief hole and the axis of the bear gun are in the first angle.
- 4. system according to claim 3, it is characterised in that first angle is 35-55 degree.
- 5. system according to claim 2, it is characterised in that in the central tube set delay every Plate explosion propagation device.
- 6. the system according to any one of claim 1 to 5, it is characterised in that in the screen casing Upstream sets damper.
- 7. the system according to any one of claim 1 to 6, it is characterised in that at least one institute The upstream for stating damper sets school depth orientation spool.
- 8. a kind of horizontal well explosion fracturing remodeling method, it is characterised in that comprise the following steps：Step 1, it is determined that transformation interval, and original hydraulic fracture is positioned,Step 2, into pit shaft, tripping in horizontal well explosion fracturing according to any one of claim 1 to 7 changes System is made, and the bear gun is corresponded to original hydraulic fracture,Step 3, oil pipe annular space is closed,Step 4, the bear gun is ignited by the initiator, and open oil pipe annular space.
- 9. according to the method for claim 8, it is characterised in that in step 3, closing oil pipe ring Before sky, it is also necessary to pressure gear liquid is filled it up with into pit shaft.
- 10. according to the method for claim 8, it is characterised in that in step 1, can in the wellbore under Enter school depth logging truck to position original hydraulic fracture, and the school depth logging truck can match somebody with somebody with school depth orientation spool Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339097.8A CN107401401A (en) | 2016-05-19 | 2016-05-19 | A kind of horizontal well explosion fracturing modernization system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339097.8A CN107401401A (en) | 2016-05-19 | 2016-05-19 | A kind of horizontal well explosion fracturing modernization system and method |
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| Publication Number | Publication Date |
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| CN107401401A true CN107401401A (en) | 2017-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610339097.8A Pending CN107401401A (en) | 2016-05-19 | 2016-05-19 | A kind of horizontal well explosion fracturing modernization system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108915661A (en) * | 2018-05-31 | 2018-11-30 | 中国海洋石油集团有限公司 | A kind of open hole well explosion fracturing underground experimental method |
| CN108952666A (en) * | 2018-05-31 | 2018-12-07 | 中国海洋石油集团有限公司 | A kind of screen casing well explosion fracturing method of controlling security |
| CN109025941A (en) * | 2018-08-09 | 2018-12-18 | 中国海洋石油集团有限公司 | Explosion fracturing and hydraulic blow pressure break axle-linked cable-car and connection make method |
| CN112832718A (en) * | 2021-03-12 | 2021-05-25 | 西南石油大学 | Deep shale gas development method |
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| US20120298363A1 (en) * | 2011-05-26 | 2012-11-29 | Baker Hughes Incorporated | Perforating string with magnetohydrodynamic initiation transfer |
| CN105064972A (en) * | 2015-08-03 | 2015-11-18 | 中国石油大学(华东) | Liquid gun propellant capsule and high-energy gas fracturing process using liquid gun propellant capsule |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915661A (en) * | 2018-05-31 | 2018-11-30 | 中国海洋石油集团有限公司 | A kind of open hole well explosion fracturing underground experimental method |
| CN108952666A (en) * | 2018-05-31 | 2018-12-07 | 中国海洋石油集团有限公司 | A kind of screen casing well explosion fracturing method of controlling security |
| CN108915661B (en) * | 2018-05-31 | 2021-03-02 | 中国海洋石油集团有限公司 | Deflagration fracturing downhole experiment method for open hole well |
| CN109025941A (en) * | 2018-08-09 | 2018-12-18 | 中国海洋石油集团有限公司 | Explosion fracturing and hydraulic blow pressure break axle-linked cable-car and connection make method |
| CN109025941B (en) * | 2018-08-09 | 2020-09-01 | 中国海洋石油集团有限公司 | Deflagration fracturing and hydraulic impact fracturing combined pipe column and combined method |
| CN112832718A (en) * | 2021-03-12 | 2021-05-25 | 西南石油大学 | Deep shale gas development method |
| CN112832718B (en) * | 2021-03-12 | 2022-04-05 | 西南石油大学 | Deep shale gas development method |
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Application publication date: 20171128 |