CN201531256U - Dynamic seal press device for improving fracturing effect of composite perforation - Google Patents
Dynamic seal press device for improving fracturing effect of composite perforation Download PDFInfo
- Publication number
- CN201531256U CN201531256U CN2009202451912U CN200920245191U CN201531256U CN 201531256 U CN201531256 U CN 201531256U CN 2009202451912 U CN2009202451912 U CN 2009202451912U CN 200920245191 U CN200920245191 U CN 200920245191U CN 201531256 U CN201531256 U CN 201531256U
- Authority
- CN
- China
- Prior art keywords
- gunpowder
- tubular body
- explosive column
- perforation
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The utility model relates to a dynamic seal press device for improving the fracturing effect of composite perforation, capable of plugging the high energy gas generated by the composite perforation in the perforation segment to prolong the effective pressure acting time and enhance the work capacity to the formation fracturing. The dynamic seal press device comprises a tubular body connected with an end of a perforating gun, the tubular body is provided with a pressure release hole with a block piece, an explosive column, a first-stage gunpowder and a two-stage gunpowder are arranged in the inner cavity of the tubular body, wherein, the first-state gunpowder is packed at the outer of the explosive column, the two-stage gunpowder is isolated from the explosive column, a flame-proof plate with sieve apertures are arranged between the two-stage gunpowder and the first-stage gunpowder. After the explosive column is blasted, the first-stage gunpowder is ignited, the first-stage gunpowder then ignites the two-stage gunpowder, the generated high pressure gas is full of a wellbore annuli adjacent to the dynamic seal press device.
Description
Technical field
The utility model is a kind of dynamic envelope pressure method and device thereof that is used to improve the combined perforation fracturing effect in oil exploration and development fields, is specially adapted to the composite gun perforation operation of technologies such as cable or tubing transmission.
Background technology
In oil gas well exploration and development field, composite gun perforation has obtained extensive use as a kind of effective volume increase method of perforating oil gas well completion in the oil field prospecting exploitation.The know-why of composite gun perforation is that the perforating bullet that will arrange according to certain Kong Mi and phase rule is assemblied in the perforating gun, and a certain amount of stick of filling that evenly distributes in rifle.During perforation, at first penetrate casing wall in advance and between stratum and pit shaft, form the duct by perforating bullet blast generation energy-gathering jetting, impact energy and heat energy by the perforating bullet blast excites the stick burning to produce dynamic high-pressure gas then, these gases at high pressure at first enter in the mineshaft annulus by the relief hole on the preforation tunnel and the body of a gun, in pit shaft, set up high pressure and go forward side by side, the pressure break acting is implemented on the stratum into the perforation duct.Composite gun perforation can form the vast fracture network that not influenced by geostatic stress in the near wellbore zone, can eliminate the pollution to the stratum of drilling well, well cementation and perforation, improves the communication state of pit shaft and oil reservoir and the osmotic effect on stratum, improves oil well productivity and life-span.But for different well ' s conditions, stratum condition and different gun perforation process, the effect of composite gun perforation operation is differentiated, such as for the more shallow well of well depth, because fluid column is low, wellbore pressure is little, the relative wellbore pressure pressure reduction of the gas pressure that composite gun perforation produced is very big (such as 1000 meters wells, the about 10MPa of head of liquid, and composite gun perforation the gas surge pressure is at 50～60MPa generally speaking, pressure differential reaches 40～50MPa), big pressure reduction can cause gases at high pressure to flow to the well head or the shaft bottom low-pressure area axial high speed of resistance minimum, the loss of energy descends the perforated interval gas pressure fast, the energy that enters the stratum reduces, and action time is short, and pressure break efficient reduces.The well low for permeability, that rock is fine and close, strata pressure is high, formation resistance is big, and gas pressure can not enter the stratum fast, wellbore pressure is raise, pressure reduction increases, and energy also can discharge the build-up of pressure loss at a high speed to resistance little well head and shaft bottom low-pressure area direction, reduces pressure break efficient.Also can influence pressure break efficient for different gun perforation process, such as for cable transmission, the general maximum of perforation segment length is no more than 4 meters, can know that by the down-hole resulting curve of p-T tester the effective pressure duration of 4 meters rifles is 2～3 times of 1 meter rifle, the perforated interval center is short more from the distance of perforating gun rifle head and gun breech, perforating gun center pressure decrease speed is just fast more, and fracturing effect is just bad more.Up to now, the domestic and international report of not seeing these problem-solving approaches.
Summary of the invention
Problem to be solved in the utility model is: a kind of dynamic envelope pressure device that is used to improve the combined perforation fracturing effect is provided, this device can be the high energy gas shutoff of composite gun perforation generation in perforated interval, prolong effective pressure action time, increase the gas flow that enters the stratum, strengthen acting ability formation breakdown.
The thinking that the utility model addresses the above problem is: the high LOADING RATES detonation gas that utilizes blast and burning to be produced is set up the dynamic high-pressure district in two ends up and down at perforated interval, thereby the gases at high pressure that suppress composite gun perforation discharge to resistance little well head or shaft bottom low-pressure area.
The technical scheme that addresses the above problem is: the dynamic envelope pressure device that being used to of being provided improved the combined perforation fracturing effect has a tubular body, the end of this tubular body is connected with the end of composite perforation gun by joint, tubular body is provided with the relief hole of band jam, the tubular body inner chamber is provided with explosive column, one-level gunpowder and secondary gunpowder, wherein the one-level gunpowder wraps in the explosive column outside, be provided with the flame proof pipe between one-level gunpowder and the explosive column, secondary gunpowder and explosive column are isolated, be provided with the flame proof plate of band sieve aperture between secondary gunpowder and the one-level gunpowder, detonating fuse inserts in the explosive column.
Above-mentioned flame proof pipe preferably adopts metal material.
The sieve diameter of the flame proof plate of above-mentioned band sieve aperture is 8～24 millimeters.Control or adjust speed and the duration that pressure replenishes with sieve aperture.
During composite gun perforation, detonating fuse is ignited the dynamically explosive column of envelope pressure device earlier, ignites the perforating bullet of composite perforation gun again.Explosive column blast back is by the flame proof pipe one-level gunpowder that ignites, the detonation gases at high pressure that the one-level gunpowder produces are full of near dynamic envelope pressure device in the pit shaft, and the flame proof plate secondary gunpowder that ignites by the band sieve aperture, the decline of wellbore pressure behind the additional one-level powder burning of the high pressure that produces after the detonation of secondary gunpowder, mineshaft annulus continues to be in high pressure conditions near making the envelope pressure device, that is: near the pit shaft envelope pressure device is implemented the gases at high pressure shutoff, and composite gun perforation is arrived in the shutoff time duration finish, stop composite gun perforation detonation gas to the pit shaft axial diffusion, thereby improve the fracturing effect of composite gun perforation.
The utility model is owing to adopt gases at high pressure to come the pit shaft of shutoff composite gun perforation section termination, stoped of the diffusion of composite gun perforation detonation gas to the pit shaft outlet, not only reduced the gas energy loss of composite gun perforation greatly, make concentrated the acting in the perforated interval of gas energy of composite gun perforation, give full play to the potential of composite gun perforation, and simple to operate, be convenient to implement, and can not stay any obstacle to subsequent handling.The utility model provide dynamic gas envelope pressure device simple in structure, can be connected with various forms of composite perforators, also can be connected with priming devices such as cable Malong head, caber initiator, pressure detonators.The utility model can not only play the effect of dynamic envelope pressure, and can replenish the composite gun perforation energy, improves pressure waveform, prolongs pressure action time significantly, reaches better fracturing effect.
Description of drawings
Fig. 1 is action principle figure of the present utility model.
Fig. 2 is the structure chart that the utility model dynamically seals pressure device.
Fig. 3 is the structure chart of flame proof plate among Fig. 2.
The specific embodiment
According to construction requirement, if once finish perforation, just a plurality of perforating guns need be coupled together at a plurality of oil reservoirs, form perforation pipe string, each perforating gun is aimed at an interval.Dynamic envelope pressure device of the present utility model can be connected the two ends up and down of an interval composite perforation gun, also can be connected the two ends up and down of each the interval composite perforation gun with perforation of a plurality of intervals.
Fig. 1 has provided the action principle of the utility model at an interval.The two ends of perforating gun 1 respectively connect a dynamically envelope pressure device 2, during composite gun perforation they are transferred to the desired location of pit shaft 3, and oil reservoirs 4 are implemented composite gun perforation.Near before the perforation perforating gun 1 wellbore pressure is P1 (can be ignored by the pressure differential that the perforating gun height is produced), the detonation gas pressure that is produced during the perforating gun perforation is P2, because P2 is greater than P1, if do not take the shutoff measure, composite gun perforation detonation gas can cause the energy loss of composite gun perforation detonation gas to the pit shaft axial diffusion.In the dynamic envelope pressure device 2 of the present utility model explosive column and gunpowder are housed, they are detonated in composite gun perforation, it is the high pressure of P3 that near the pit shaft of the high LOADING RATES detonation gas that the produces perforating gun two ends forms pressure, P3 is not less than P2, like this, the detonation gas that has not only stoped composite gun perforation is to the pit shaft axial diffusion, and can replenish the composite gun perforation energy, reaches better fracturing effect.Dynamically preferably be not less than the action time of the detonation gas of composite gun perforation generation the action time of the detonation gas of envelope pressure device 2 generations.
Fig. 2 has provided concrete structure that the utility model dynamically seals pressure device.Dynamically the envelope pressure device has a tubular body 21, and the end of tubular body 21 can be connected with the upper end or the bottom of composite perforation gun by lower contact 22a or top connection 22b.The inner chamber of tubular body 21 is divided into upper semisection and lower semisection, the flame proof plate 23 of band sieve aperture 23d is located between the upper semisection and lower semisection of tubular body 21 inner chambers, explosive column 24 and one-level gunpowder 25 are contained in the lower semisection of tubular body 21 inner chambers, secondary gunpowder 26 is contained in the upper semisection of tubular body 21 inner chambers, and the relief hole 27 of band jam is located at the lower semisection of tubular body 21.The quantity of relief hole 27 and big I are according to shutoff pressure of setting and LOADING RATES decision.One-level gunpowder 25 wraps in explosive column 24 outsides, is provided with flame proof pipe 28 between the two, and detonating fuse 29 passes from the explosion arrestment pipe 30 at secondary gunpowder 26 centers, inserts explosive column 24 then.Be positioned at the dynamic envelope pressure device of perforating gun upper end, its detonating fuse also will continue to extend to perforating gun.
The structure of flame proof plate 23 is as shown in Figure 3: flame proof plate 23 comprises the centre bore 23a that is used for detonating fuse and passes through, is positioned at the outer solid area of isolation 23b of centre bore 23a and is positioned at the outer sieve aperture zone 23c of solid area of isolation, wherein solid area of isolation 23b isolates explosive column 24 and secondary gunpowder 26, and sieve aperture zone 23c is between explosive column 24 and one-level gunpowder 25.
During composite gun perforation, detonating fuse 28 first ignition charge posts 24 are that the detonation gas of one-level gunpowder 25 is washed the jam in the relief hole 27 open by the flame proof pipe 28 one-level gunpowder 25 that ignites after explosive column 24 blast, enter near mineshaft annulus by relief hole 27, form a higher-pressure region.Flame proof pipe 28 plays a part to delay to ignite, and the rate of climb of shutoff pressure and the rate of pressure rise of composite gun perforation are kept synchronously.The sieve aperture 23d of the detonation of one-level gunpowder by the flame proof plate secondary gunpowder 26 that ignites, its detonation gas enters near mineshaft annulus by the sieve aperture 23d and the relief hole 27 of flame proof plate 23.The sieve aperture 23d of flame proof plate plays a part control detonation rate of gas release, make near the mineshaft annulus of the secondary gunpowder detonation gas continuous action envelope pressure device, and the quick decline of wellbore pressure behind the additional one-level powder burning, guarantee near the long action time of the duration of the wellbore annulus pressure dynamic envelope pressure device than composite gun perforation effective pressure.In addition, the gases at high pressure that the secondary gunpowder produces can also replenish the composite gun perforation energy, reach better fracturing effect.
Claims (4)
1. be used to improve the dynamic envelope pressure device of combined perforation fracturing effect, it is characterized in that having a tubular body (21), the end of this tubular body is connected with the end of composite perforation gun by joint, tubular body is provided with the relief hole (27) of band jam, the tubular body inner chamber is provided with explosive column (24), one-level gunpowder (25) and secondary gunpowder (26), wherein one-level gunpowder (25) wraps in explosive column (24) outside, be provided with flame proof pipe (28) between one-level gunpowder and the explosive column, secondary gunpowder (26) is isolated with explosive column (24), be provided with the flame proof plate (23) of band sieve aperture between secondary gunpowder (26) and the one-level gunpowder (25), detonating fuse (29) inserts in the explosive column (24).
2. envelope pressure device according to claim 1, the inner chamber that it is characterized in that tubular body (21) is divided into upper semisection and lower semisection, the flame proof plate (23) of band sieve aperture (23d) is located between the upper semisection and lower semisection of tubular body (21) inner chamber, explosive column (24) and one-level gunpowder (25) are contained in the lower semisection of tubular body inner chamber, secondary gunpowder (26) is contained in the upper semisection of tubular body inner chamber, and the relief hole (27) of band jam is located at the lower semisection of tubular body (21).
3. envelope pressure device according to claim 1 is characterized in that sieve aperture (23d) diameter of flame proof plate (23) is 8～24 millimeters.
4. according to claim 2 or 3 described envelope pressure devices, it is characterized in that flame proof plate (23) comprises the centre bore (23a) that is used for detonating fuse and passes through, is positioned at the outer solid area of isolation (23b) of centre bore (23a) and is positioned at solid area of isolation sieve aperture zone (23c) outward, wherein solid area of isolation (23b) is isolated explosive column (24) and secondary gunpowder (26), and sieve aperture zone (23c) is positioned between explosive column (24) and the one-level gunpowder (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202451912U CN201531256U (en) | 2009-11-11 | 2009-11-11 | Dynamic seal press device for improving fracturing effect of composite perforation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202451912U CN201531256U (en) | 2009-11-11 | 2009-11-11 | Dynamic seal press device for improving fracturing effect of composite perforation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531256U true CN201531256U (en) | 2010-07-21 |
Family
ID=42526660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202451912U Expired - Lifetime CN201531256U (en) | 2009-11-11 | 2009-11-11 | Dynamic seal press device for improving fracturing effect of composite perforation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531256U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011057564A1 (en) * | 2009-11-11 | 2011-05-19 | 西安通源石油科技股份有限公司 | Combined fracturing and perforating method and device for oil and gas well |
| CN102146784A (en) * | 2011-05-23 | 2011-08-10 | 黑龙江华安民爆器材有限责任公司 | Novel ignition structure |
| CN102052066B (en) * | 2009-11-11 | 2014-03-19 | 西安通源石油科技股份有限公司 | Dynamic seal pressing method and device for improving complex perforation pressing crack effect |
| CN104563980A (en) * | 2015-01-05 | 2015-04-29 | 大庆华翰邦石油装备制造有限公司 | Composite perforation impulse automatic adjustment device |
| CN109339761A (en) * | 2018-11-16 | 2019-02-15 | 吴继先 | Fluid injection and apparatus to cause bursting for oil and gas reservoir |
| CN115059436A (en) * | 2022-07-14 | 2022-09-16 | 李绍武 | Perforator for oil and gas exploitation hydraulic fracturing |
-
2009
- 2009-11-11 CN CN2009202451912U patent/CN201531256U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011057564A1 (en) * | 2009-11-11 | 2011-05-19 | 西安通源石油科技股份有限公司 | Combined fracturing and perforating method and device for oil and gas well |
| CN102052066B (en) * | 2009-11-11 | 2014-03-19 | 西安通源石油科技股份有限公司 | Dynamic seal pressing method and device for improving complex perforation pressing crack effect |
| CN102146784A (en) * | 2011-05-23 | 2011-08-10 | 黑龙江华安民爆器材有限责任公司 | Novel ignition structure |
| CN102146784B (en) * | 2011-05-23 | 2014-04-16 | 黑龙江华安民爆器材有限责任公司 | Novel ignition structure |
| CN104563980A (en) * | 2015-01-05 | 2015-04-29 | 大庆华翰邦石油装备制造有限公司 | Composite perforation impulse automatic adjustment device |
| CN104563980B (en) * | 2015-01-05 | 2017-04-05 | 大庆华翰邦石油装备制造有限公司 | A kind of composite gun perforation momentum self-checking device |
| CN109339761A (en) * | 2018-11-16 | 2019-02-15 | 吴继先 | Fluid injection and apparatus to cause bursting for oil and gas reservoir |
| CN115059436A (en) * | 2022-07-14 | 2022-09-16 | 李绍武 | Perforator for oil and gas exploitation hydraulic fracturing |
| CN115059436B (en) * | 2022-07-14 | 2024-02-02 | 魏月萍 | Perforator for hydraulic fracturing in oil and gas exploitation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12078034B2 (en) | Cracking permeability increasing method combining hydraulic fracturing and methane in-situ combustion explosion | |
| CN201620848U (en) | Vertical well orientation multi-pulse increase-benefit perforating device | |
| CN102052066B (en) | Dynamic seal pressing method and device for improving complex perforation pressing crack effect | |
| CN201531256U (en) | Dynamic seal press device for improving fracturing effect of composite perforation | |
| CN101619654B (en) | Pulse fracturing sand injector for horizontal wells | |
| CN103244096B (en) | The closed pulse of coal gas layer loads the device and method of pressure break loosely stress | |
| CN109098695B (en) | A kind of perforating and fracturing integrated apparatus and method based on carbon dioxide blasting technique | |
| CN102168543A (en) | Method and apparatus of improving recovery efficiency of shale gas through a blast mode | |
| CN201531261U (en) | Deflagration fracturing device used in cased well | |
| RU98047U1 (en) | HEAT AND GAS GENERATOR FOR IMPROVEMENT OF FILTRATION OF THE LAYER IN ITS NEARBORING ZONE | |
| RU2439312C1 (en) | Heat gas generator for improvement of formation filtration in its well bore zone | |
| CN109025941B (en) | Deflagration fracturing and hydraulic impact fracturing combined pipe column and combined method | |
| CN207315333U (en) | A kind of high energy multiple pulse perforating and fracturing device | |
| CN104975838B (en) | A kind of method for preventing high enegry gas fracturing existing crack from closing | |
| CN113898330A (en) | Horizontal well open hole section methane in-situ perforation, combustion, explosion and fracturing integrated device and method | |
| CN203362135U (en) | Perforating device improving gas permeability of coal beds | |
| CN110454131A (en) | A kind of fill-type detonation cumulative volume fracturing method in seam | |
| CN106382110A (en) | Intrastratal explosive fracturing ignition ball and fracturing construction method | |
| CN108915661B (en) | Deflagration fracturing downhole experiment method for open hole well | |
| CN201045293Y (en) | High dense holes multilevel pulse sand carrying compound perforation device | |
| CN202381051U (en) | Energy-gathering composite perforating pipe column | |
| CN204299554U (en) | A kind of Oil/gas Well multiphase flow perforating and fracturing sanding device | |
| CN103225498B (en) | Multi-stage composite deep penetration perforating device | |
| US6223656B1 (en) | Pressure enhanced penetration with shaped charge perforators | |
| CN104929591A (en) | Inner orientation interception fixed-jet-angle multistage pulse enhanced-perforator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100721 Effective date of abandoning: 20091111 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20100721 Effective date of abandoning: 20091111 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |