CN102619496B - Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock - Google Patents
Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock Download PDFInfo
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- CN102619496B CN102619496B CN201210106910.9A CN201210106910A CN102619496B CN 102619496 B CN102619496 B CN 102619496B CN 201210106910 A CN201210106910 A CN 201210106910A CN 102619496 B CN102619496 B CN 102619496B
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Abstract
The invention relates to a method for layering, stage multi-level blasting, hole expanding and crack expanding of an oil-gas-bearing rock. A drilling machine drills a vertical hole to the oil-gas-bearing rock, multilayer horizontal build-up is conducted in the oil-gas-bearing rock, and a casing pipe is contacted and fixed with an outer shale body and extends into a curve section; a light pipe is contacted and fixed with the outer shale body in a horizontal section, a packer is used for sealing the staggered position of the light pipe and the casing pipe, the light pipe with the preset length is arranged inside the horizontal section, and except the light pipe section, the residual horizontal section is an uncased hole; and a hydraulic expansion device is used for sending explosives to different positions of the horizontal uncased hole section, the explosive quantities increase gradually at the same position, stage blasting hole expanding and high-pressure gas explosion cracking at the position of the uncased hole are completed, and backwashing is conducted for different-stage blasting broken rocks to clear the uncased hole. Step-by-step blasting is conducted in a direction from the remote end of the uncased hole to the light pipe during blasting cracking, different levels of explosive quantities are adopted, the quantity at the remote end of the uncased hole is the most and the quantities are reduced gradually towards the curve section, so that the light pipe is protected, the backwashing of blasting broken rocks is facilitated, and big hole collapse and cracking are achieved.
Description
Technical field
The present invention relates to oily rock horizontal well blast reaming fracturing technical field, especially relate to the multistage explosion reaming of a kind of oily rock layer and section and increase cracking method.
Background technology
Hydraulic fracturing technology is to be applied in one of comparatively extensive, effective method for increasing in oil gas field engineering development.Fracturing is by inject water under high pressure in hydrocarbon storage, and water under high pressure pressure causes the development of oil-gas reservoir Reservoir Fracture, increases and expands oil, impervious passage, reaches the target of oil-gas reservoir volume increase.
Fracturing facts have proved in Reservoir Development, fracturing can improve oil, gas output to a certain extent, but after fracturing, the duration is short, crack again densification oil, air infiltration circulation road, water under high pressure mode be must take to note again and oil, gas output maintained, oil, gas cost of winning are significantly improved, and fracturing affects oil-gas mining progress repeatedly, effect of increasing production is not obvious.
Summary of the invention
The object of the invention is for the height injection existing in the exploitation of oily rock, the problem of low output, provide that a kind of technique is simple, easy to operate, safety, be applicable to field operation, can effectively expand shale reservoir hole, crack developing and be conducive to shale gas the multistage explosion reaming increasing of the layer and section cracking method that continues exploitation.
The multistage explosion reaming of oily rock layer and section of the present invention increases cracking method:
A, rig bore upright opening to oily rock, point multiple-layer horizontal deflecting in oily rock, by vertical section through bending section to horizontal segment, horizontal segment extends to precalculated position;
B, use sleeve pipe contact fixing with external page rock mass, sleeve pipe extends to bending section;
C, to use light pipe contact with external page rock mass at horizontal segment fixing, light pipe and sleeve pipe intervening portion use packer sealing, and light pipe arranges predetermined length at horizontal segment, and the residue horizontal segment that removes light pipe section is bore hole;
D, hydraulic telescopic device and explosive are delivered to horizontal segment light pipe end, utilize hydraulic telescopic device explosive level to be pushed into the position of setting after device bounce back to original position, ignition charge, the backwash of explosion detritus piece goes out bore hole;
E, hydraulic telescopic device are promoted to ground and place, after strengthening magnitude explosive, deliver to again horizontal segment light pipe (3) end, after explosive level being pushed into the position of setting, hydraulic telescopic device bounces back to original position, ignition charge, position explosion reaming and high pressure gas explosion fracturing that bore hole (4) explosive charge is being set, broken sillar backwash goes out bore hole (4), the multistage explosion of bore hole segmentation that circulated of the operation of steps d, e, bore hole (4) sector hole hole increases and the fracture propagation of caving in, and finally broken sillar backwash in bore hole (4) section is portalled.
Hydraulic telescopic device comprises: force pipe, hydraulic bag, expansion link and explosive holding clamp, and hydraulic telescopic device is placed light pipe end and elongation and is sent explosive to the fixing explosive of jig in desired location process, and setting position jig to be reached puts down explosive.
The present invention can expand bore hole bore hole size, shale reservoir obtains effective stress release, and impel crack progressing to connect, strengthen shale gas infiltration, implement the different magnitudes blasts of segmentation in the bore hole district of oily rock different layers, be conducive to expand Open-Hole Section hole, increase reservoir rock crushing and be caving crack, stress release and fracture propagation and connect, to strengthening, shale gas permeates and raising shale gas output, sustainable exploitation have great role, its technique is simple, and easy to operate, safety is applicable to field operation.
Brief description of the drawings
Fig. 1 is embodiments of the invention schematic diagrames.
In Fig. 1: 1-oily rock, 2-sleeve pipe, 3-light pipe, 4-bore hole, 5-packer, 6-force pipe, 7-hydraulic bag, 8-expansion link, 9-explosive holding clamp, 10-through crack
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described further.
Shown in Fig. 1, certain oily rock 1 rammell thickness is about 20m, rig bore upright opening to oily rock 1, at center, rammell deflecting, spud in bending section and horizontal segment, by vertical section through bending section to horizontal segment, horizontal segment extends to precalculated position.
Use sleeve pipe 2 to contact with external page rock mass fixing, sleeve pipe extends to bending section.Use light pipe 3 to contact with external page rock mass at horizontal segment fixing, light pipe 3 uses packer 5 to seal with sleeve pipe 2 intervening portions, and light pipe 3 arranges predetermined length at horizontal segment, except the residue horizontal segment of light pipe section is bore hole 4.
Hydraulic telescopic device and explosive are delivered to horizontal segment light pipe 3 ends, utilize force pipe 6 to injection pressure in hydraulic bag 7, expansion link 8 extends and explosive holding clamp 9 and explosive level are pushed into device and jig 9 behind the position of setting bounce back to original position, ignition charge, and the backwash of explosion detritus piece goes out bore hole 4.
Hydraulic telescopic device is promoted to ground and places, after strengthening magnitude explosive, deliver to again horizontal segment light pipe 3 ends, after explosive level being pushed into the position of setting, device bounces back to original position, ignition charge, bore hole 4 this position explosion reaming and high pressure gas explosion fracturings, broken sillar backwash goes out bore hole 4, the operation multistage explosion of bore hole 4 segmentation that circulated, bore hole 4 sector hole holes increase and the fracture propagation of caving in, finally broken sillar backwash in 4 sections of bore holes is portalled, form setback type hole 4 sections of bore holes, occur with many through cracks 10, bore hole 4 bore hole sizes are expanded, through crack 10 quantity are increased, strengthen flowing of shale gas.
Oily rock 1 is thicker or middle while there is interlayer, can implement the multistage blast of segmentation at different layers simultaneously, also can direction from lower to upper successively execute quick-friedly, discharge to reach reservoir rock mass stress, to strengthen shale gas infiltration and improve shale gas output, sustainable exploitation has great role.
The present invention can expand bore hole bore hole size, shale reservoir obtains effective stress release, and impel crack 10 development to connect, strengthen shale gas infiltration, implement the different magnitude blasts of segmentation in the bore hole district of oily rock different layers, be conducive to expand Open-Hole Section hole, increase reservoir rock crushing and be caving crack, stress release and fracture propagation and connect, to strengthen shale gas infiltration and improve shale gas output, sustainable exploitation has great role.In addition, technique of the present invention is simple, and easy to operate, safety is applicable to field operation.
Claims (2)
1. the multistage explosion reaming of oily rock layer and section increases a cracking method, it is characterized in that, comprises the steps:
A, rig bore upright opening to oily rock (1), point multiple-layer horizontal deflecting in oily rock (1), by vertical section through bending section to horizontal segment, horizontal segment extends to precalculated position;
B, use sleeve pipe (2) contact fixing with external page rock mass, sleeve pipe (2) extends to bending section;
C, horizontal segment use light pipe (3) contact with external page rock mass fix, light pipe (3) uses packer (5) sealing with sleeve pipe (2) intervening portion, light pipe (3) arranges predetermined length at horizontal segment, except the residue horizontal segment of light pipe section is bore hole (4);
D, hydraulic telescopic device and explosive are delivered to horizontal segment light pipe (3) end, after utilizing hydraulic telescopic device explosive level to be pushed into the position of setting, hydraulic telescopic device bounces back to original position, ignition charge, the backwash of explosion detritus piece goes out bore hole (4);
E, hydraulic telescopic device are promoted to ground and place, after strengthening magnitude explosive, deliver to again horizontal segment light pipe (3) end, after explosive level being pushed into the position of setting, hydraulic telescopic device bounces back to original position, ignition charge, position explosion reaming and high pressure gas explosion fracturing that bore hole (4) explosive charge is being set, broken sillar backwash goes out bore hole (4), the multistage explosion of bore hole segmentation that circulated of the operation of steps d, e, bore hole (4) sector hole hole increases and the fracture propagation of caving in, and finally broken sillar backwash in bore hole (4) section is portalled.
2. the multistage explosion reaming of a kind of oily rock layer and section according to claim 1 increases cracking method, it is characterized in that, described hydraulic telescopic device comprises: force pipe (6), hydraulic bag (7), expansion link (8) and explosive holding clamp (9), hydraulic telescopic device is placed light pipe (3) end and elongation and is sent explosive to the fixing explosive of jig (9) in desired location process, and setting position jig to be reached (9) puts down explosive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106910.9A CN102619496B (en) | 2012-04-12 | 2012-04-12 | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106910.9A CN102619496B (en) | 2012-04-12 | 2012-04-12 | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102619496A CN102619496A (en) | 2012-08-01 |
| CN102619496B true CN102619496B (en) | 2014-09-24 |
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| CN201210106910.9A Expired - Fee Related CN102619496B (en) | 2012-04-12 | 2012-04-12 | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877823A (en) * | 2012-09-29 | 2013-01-16 | 肖功宽 | Cracking method adopting blasting principle for improving gas output for shale gas |
| CN108896224B (en) * | 2013-12-06 | 2021-02-02 | 宋协翠 | Device for measuring ground stress |
| CN107060717B (en) * | 2017-06-14 | 2023-02-07 | 长春工程学院 | Oil shale underground in-situ cleavage cracking construction device and construction process |
| CN107060716B (en) * | 2017-06-14 | 2023-02-07 | 长春工程学院 | Oil shale underground in-situ jet splitting construction device and construction process |
| CN113294134B (en) * | 2021-05-31 | 2022-03-11 | 中国矿业大学 | Hydraulic fracturing and methane in-situ blasting synergistic fracturing permeability-increasing method |
Citations (9)
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|---|---|---|---|---|
| US3902422A (en) * | 1973-07-26 | 1975-09-02 | Du Pont | Explosive fracturing of deep rock |
| US4300800A (en) * | 1979-09-14 | 1981-11-17 | Occidental Oil Shale, Inc. | Method of rubbling a pillar |
| US4705108A (en) * | 1986-05-27 | 1987-11-10 | The United States Of America As Represented By The United States Department Of Energy | Method for in situ heating of hydrocarbonaceous formations |
| US5449039A (en) * | 1994-02-07 | 1995-09-12 | Canadian Occidental Petroleum, Ltd. | Apparatus and method for horizontal well fracture stimulation |
| CN1215789A (en) * | 1997-10-27 | 1999-05-05 | 哈利伯顿能源服务公司 | Well system |
| RU2319831C1 (en) * | 2007-01-18 | 2008-03-20 | Рашид Вагизович Гафуров | Method for oil production from low-permeable reservoirs |
| CN101737027A (en) * | 2009-11-25 | 2010-06-16 | 西安石油大学 | High energy gas fracturing device of oil reservoirs of horizontal well |
| CN102330547A (en) * | 2011-09-23 | 2012-01-25 | 西安石油大学 | Micro-fracture explosion propagation device for interlayer explosion laboratory study |
| CN202140076U (en) * | 2011-07-25 | 2012-02-08 | 西安石油大油气科技有限公司 | Experimental device for laboratory researches of explosion in oil field layers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6499406B2 (en) * | 2000-12-30 | 2002-12-31 | Dong Soo Shim | Blasting apparatus for forming horizontal underground cavities and blasting method using the same |
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2012
- 2012-04-12 CN CN201210106910.9A patent/CN102619496B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902422A (en) * | 1973-07-26 | 1975-09-02 | Du Pont | Explosive fracturing of deep rock |
| US4300800A (en) * | 1979-09-14 | 1981-11-17 | Occidental Oil Shale, Inc. | Method of rubbling a pillar |
| US4705108A (en) * | 1986-05-27 | 1987-11-10 | The United States Of America As Represented By The United States Department Of Energy | Method for in situ heating of hydrocarbonaceous formations |
| US5449039A (en) * | 1994-02-07 | 1995-09-12 | Canadian Occidental Petroleum, Ltd. | Apparatus and method for horizontal well fracture stimulation |
| CN1215789A (en) * | 1997-10-27 | 1999-05-05 | 哈利伯顿能源服务公司 | Well system |
| RU2319831C1 (en) * | 2007-01-18 | 2008-03-20 | Рашид Вагизович Гафуров | Method for oil production from low-permeable reservoirs |
| CN101737027A (en) * | 2009-11-25 | 2010-06-16 | 西安石油大学 | High energy gas fracturing device of oil reservoirs of horizontal well |
| CN202140076U (en) * | 2011-07-25 | 2012-02-08 | 西安石油大油气科技有限公司 | Experimental device for laboratory researches of explosion in oil field layers |
| CN102330547A (en) * | 2011-09-23 | 2012-01-25 | 西安石油大学 | Micro-fracture explosion propagation device for interlayer explosion laboratory study |
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| CN102619496A (en) | 2012-08-01 |
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