CN102619496A - 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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- CN102619496A CN102619496A CN2012101069109A CN201210106910A CN102619496A CN 102619496 A CN102619496 A CN 102619496A CN 2012101069109 A CN2012101069109 A CN 2012101069109A CN 201210106910 A CN201210106910 A CN 201210106910A CN 102619496 A CN102619496 A CN 102619496A
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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 and cause and split 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 be applied in the oil gas field engineering development comparatively extensively, one of effectively raising the output method.Fracturing is through in hydrocarbon storage, injecting water under high pressure, and water under high pressure pressure causes the development of oil-gas reservoir reservoir crack, increases and expansion oil, impervious passage, reaches the target of oil-gas reservoir raising the output.
Fracturing facts have proved in the oil-gas reservoir exploitation; Fracturing can improve oil, gas output to a certain extent, but after the fracturing duration short, the crack again densification oil, air infiltration circulation road; The water under high pressure mode be must take to annotate again and oil, gas output kept; Make oil, air to open adopt cost and significantly improve, and fracturing influences the oil-gas mining progress repeatedly, effect of increasing production is not obvious.
Summary of the invention
The objective of the invention is to inject, hang down the problem of output to the height that exists in the exploitation of oily rock; Provide that a kind of technology is simple, easy to operate, safety; Be fit to field operation, can effectively enlarge shale reservoir hole, crack developing and help the multistage explosion reaming of layer and section that shale gas continues exploitation and increase cracking method.
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, in the oily rock, divide multilayer horizontal deflecting, by vertical section through bending section to horizontal segment, horizontal segment extends to the precalculated position;
B, use sleeve pipe contact fixing with the external page rock mass, sleeve pipe extends to bending section;
C, to use light pipe contact with the external page rock mass at horizontal segment fixing, light pipe and sleeve pipe intervening portion use packer sealing, and light pipe is provided with predetermined length at horizontal segment, except that the residue horizontal segment of light pipe section is a bore hole;
D, hydraulic telescopic device and explosive are delivered to horizontal segment light pipe end, utilize hydraulic telescopic device the 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 promote delivers to horizontal segment light pipe end after increasing magnitude explosive is placed on ground again; Device bounces back to original position after the explosive level being pushed into the position of setting, ignition charge, and this position explosion reaming of bore hole and the quick-fried gas of high pressure cause and split; Broken sillar backwash goes out bore hole; The multistage explosion of bore hole segmentation is accomplished in the operation circulation, and bore hole sector hole hole increases and the fracture propagation of caving in, and at last broken sillar backwash in the bore hole section is portalled.
Hydraulic telescopic device comprises: force pipe, hydraulic pressure capsule, expansion link and explosive holding clamp, hydraulic telescopic device are placed light pipe end and elongation and are sent in explosive to the desired location process fixedly explosive of jig, wait to reach the setting position jig and put down explosive.
The present invention can enlarge the bore hole bore hole size, and the shale reservoir obtains effective stress release, and impels the crack development to connect; Strengthen the shale gas infiltration, implement the different magnitudes blasts of segmentation in the bore hole district of oily rock different layers, help enlarging bore hole sector hole hole, increase collapse fall crack, stress release and the fracture propagation of reservoir rock crushing and connect; Shale gas permeates and raising shale gas output, sustainable exploitation have great role to strengthening; Its technology is simple, and easy to operate, safety is fit to field operation.
Description of drawings
Fig. 1 is the embodiments of the invention sketch mapes.
Among Fig. 1: 1-oily rock, 2-sleeve pipe, 3-light pipe, 4-bore hole, 5-packer, 6-force pipe, 7-hydraulic pressure capsule, 8-expansion link, 9-explosive holding clamp, 10-through crack
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further.
Shown in Figure 1, certain oily rock 1 rammell thickness is about 20m, and rig bores upright opening to oily rock 1, the deflecting in the center, rammell, spud in bending section and horizontal segment, by vertical section through bending section to horizontal segment, horizontal segment extends to the precalculated position.
It is fixing to use sleeve pipe 2 to contact with the external page rock mass, and sleeve pipe extends to bending section.It is fixing to use light pipe 3 contact with the external page rock mass at horizontal segment, and light pipe 3 uses packer 5 to seal with sleeve pipe 2 intervening portions, and light pipe 3 is provided with predetermined length at horizontal segment, except that the residue horizontal segment of light pipe section is a bore hole 4.
Hydraulic telescopic device and explosive are delivered to horizontal segment light pipe 3 ends; Utilize force pipe 6 injection pressure in hydraulic pressure capsule 7; Expansion link 8 elongation is pushed into explosive holding clamp 9 and explosive level that device and jig 9 bounce back to original position behind the position of setting, ignition charge, and the backwash of explosion detritus piece goes out bore hole 4.
Hydraulic telescopic device is promoted to ground and places, and delivers to horizontal segment light pipe 3 ends again after strengthening the magnitude explosive, the explosive level is pushed into the position of setting after device bounce back to original position; Ignition charge, bore hole 4 these position explosion reamings and the quick-fried gas of high pressure cause and split, and broken sillar backwash goes out bore hole 4; The multistage explosion of bore hole 4 segmentations is accomplished in operation circulation, and bore hole 4 sector hole holes increase and the fracture propagation of caving in, and at last broken sillar backwash in 4 sections of the bore holes is portalled; Form setback type hole 4 sections of bore holes, occur, enlarged bore hole 4 bore hole sizes with many through cracks 10; Increase through crack 10 quantity, strengthened flowing of shale gas.
The present invention can enlarge the bore hole bore hole size; The shale reservoir obtains effective stress release; And impel crack 10 development to connect, and strengthen the shale gas infiltration, implement the different magnitude blasts of segmentation in the bore hole district of oily rock different layers; Help enlarging bore hole sector hole hole, increase collapse fall crack, stress release and the fracture propagation of reservoir rock crushing and connect, to strengthen the shale gas infiltration and improve shale gas output, sustainable exploitation has great role.In addition, technology of the present invention is simple, and easy to operate, safety is fit to field operation.
Claims (2)
1. the multistage explosion reaming of oily rock layer and section increases cracking method, it is characterized in that, comprises the steps:
A, rig bore upright opening to oily rock (1), the horizontal deflecting of branch multilayer in oily rock (1), by vertical section through bending section to horizontal segment, horizontal segment extends to the precalculated position;
B, use sleeve pipe (2) contact fixing with the external page rock mass, sleeve pipe (2) extends to bending section;
C, to use light pipe (3) contact with the external page rock mass at horizontal segment fixing, and light pipe (3) uses packer (5) to seal with sleeve pipe (2) intervening portion, and light pipe (3) is provided with predetermined length at horizontal segment, except that 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, utilize hydraulic telescopic device the explosive level to be pushed into the position of setting after hydraulic telescopic device bounce 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, and deliver to horizontal segment light pipe (3) end again after strengthening the magnitude explosive, the explosive level is pushed into the position of setting after hydraulic telescopic device bounce back to original position; Ignition charge; This position explosion reaming of bore hole (4) and the quick-fried gas of high pressure cause and split, and broken sillar backwash goes out bore hole (4), and the multistage explosion of bore hole segmentation is accomplished in the operation circulation; Bore hole (4) sector hole hole increases and the fracture propagation of caving in, and at last 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; Said hydraulic telescopic device comprises: force pipe (6), hydraulic pressure capsule (7), expansion link (8) and explosive holding clamp (9); Hydraulic telescopic device is placed light pipe (3) end and elongation and is sent in explosive to the desired location process fixedly explosive of jig (9), waits to reach setting position jig (9) and 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 |
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| Publication Number | Publication Date |
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| CN102619496A true CN102619496A (en) | 2012-08-01 |
| CN102619496B 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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Cited By (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 |
| CN104697672A (en) * | 2013-12-06 | 2015-06-10 | 刘敬寿 | Device and method for measuring ground stress by using core of oil well |
| CN107060716A (en) * | 2017-06-14 | 2017-08-18 | 长春工程学院 | A kind of oil shale underground in situ injection splitting constructing device and construction technology |
| CN107060717A (en) * | 2017-06-14 | 2017-08-18 | 长春工程学院 | A kind of oil shale underground in situ splitting cracking constructing device and construction technology |
| CN113294134A (en) * | 2021-05-31 | 2021-08-24 | 中国矿业大学 | Hydraulic fracturing and methane in-situ blasting synergistic fracturing permeability-increasing method |
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| 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 |
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Patent Citations (10)
| 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 |
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| WO2002054005A2 (en) * | 2000-12-30 | 2002-07-11 | Dong Soo Shim | Blasting apparatus for forming horizontal underground cavities and blasting method using the same |
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Cited By (7)
| 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 |
| CN104697672A (en) * | 2013-12-06 | 2015-06-10 | 刘敬寿 | Device and method for measuring ground stress by using core of oil well |
| CN104697672B (en) * | 2013-12-06 | 2018-11-27 | 中国地质大学（北京） | A kind of device using oil well rock core geodetic stress |
| CN107060716A (en) * | 2017-06-14 | 2017-08-18 | 长春工程学院 | A kind of oil shale underground in situ injection splitting constructing device and construction technology |
| CN107060717A (en) * | 2017-06-14 | 2017-08-18 | 长春工程学院 | A kind of oil shale underground in situ splitting cracking constructing device and construction technology |
| 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 |
| CN113294134A (en) * | 2021-05-31 | 2021-08-24 | 中国矿业大学 | Hydraulic fracturing and methane in-situ blasting synergistic fracturing permeability-increasing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102619496B (en) | 2014-09-24 |
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