CN108825195A - A kind of coal bed gas horizontal well collapse hole makes cave release development system and method - Google Patents
A kind of coal bed gas horizontal well collapse hole makes cave release development system and method Download PDFInfo
- Publication number
- CN108825195A CN108825195A CN201810402744.4A CN201810402744A CN108825195A CN 108825195 A CN108825195 A CN 108825195A CN 201810402744 A CN201810402744 A CN 201810402744A CN 108825195 A CN108825195 A CN 108825195A
- Authority
- CN
- China
- Prior art keywords
- horizontal well
- well
- coal
- bed gas
- horizontal
- 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.)
- Pending
Links
Classifications
-
- 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
- E21B43/006—Production of coal-bed methane
-
- 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
-
- 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A kind of coal bed gas horizontal well collapse hole makes cave release development system and method.The invention discloses a kind of coal bed gas horizontal well collapse holes to make cave Depressurized mining system and method, the entrance of abrasive material mixing arrangement in system is connected to liquid storage tank and abrasive can respectively, exports and is connected to ground power unit entrance, the outlet of ground power unit is connected to Downhole jetting device, and Downhole jetting device is located at horizontal well horizontal segment at well head；After cave barefoot completion is made in horizontal well reaming, it is sprayed by ground power unit by fluid-mixing with certain frequency to delivered downhole and via Downhole jetting device, deformation coal coal bed gas horizontal well pressure fluctuation excitation and stress release are realized, and realizes waterpower displacement coal-liquid-gas mixture and migrates along discharge space to straight well section.The present invention can be realized deformation coal original position coal bed gas horizontal well collapse hole and make cave release and stress release, to realize that the high-efficiency and continuous exploitation of deformation coal original position coal bed gas provides basis.
Description
Technical field
The present invention relates to a kind of coal bed gas horizontal well release development system and methods, horizontal more particularly to a kind of coal bed gas
Cave release development system and method are made in well slough hole, belong to coal-bed gas exploitation field.
Background technique
Deformation coal refers to that coal seam is acted on by tectonic stress, and primary structure, construction are generated fragmentation, rub by destruction is split by force
The coal of the tectonisms features such as wrinkle, polishing face.It is CHINESE COAL and coal that deformation coal extensive development and deformation coal coal bed gas resource, which enrich,
The notable feature of layer gas resource, deformation coal stock number account for China and have found that the ratio of coal resources is very high, deformation coal coal bed gas money
The ratio of the China Yuan Liangzhan coal bed gas resource total amount is bigger.Deformation coal has the prominent features such as rich gas, hypotonic, soft, mostly coal
It is difficult because endangering big and methane drainage and utilization project with Coal Seam Prone To Outburst, mostly its wind is discharged in atmosphere in coal production, deformation coal coal seam
The Efficient Development of gas has meaning very outstanding to the energy, safety, ecology.
Method based on Draining hook desorption gas production theory is the main method of current coal bed gas ground well development in situ, by
The reforming modes poor effect such as extremely low and hydraulic fracturing in deformed coal permeability, Draining hook desorb gas production theory and are not suitable for
Applied to deformed coal, exploration and development practice result is also indicated that, the coal bed gas based on Draining hook desorption gas production theoretical basis
Exploration and development technology, including SVR technology series (vertical well fracture, U-shaped well, multiple hole horizontal well, fractured horizontal well etc.), ECBM skill
Art series (CO2-ECBM、N2- ECBM etc.) and its complex technique, it cannot achieve the Efficient Development of deformation coal coal bed gas.Thus,
Deformation coal coal bed gas Efficient Exploration development technique becomes with equipment restricts the important of In Coalbed Methane Industry of China rapid scale development
One of technical bottleneck.
With the further investigation to Coal-seam Gas Recovery Technologies, it is anti-reflection that coal field protected seam deformation coal coal bed gas adopts release
Development theories provide new thinking for the exploitation of deformation coal original position coal bed gas, therefore, grind and create one kind suitable for deformation coal original position
The release development system and method for coal bed gas horizontal well, for for breaking China's deformation coal coal bed gas surface well Efficient Development skill
Art bottleneck, with important theory and actual production directive significance.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of coal bed gas horizontal well collapse hole and makes cave release development system and side
Method can be realized deformation coal original position coal bed gas horizontal well collapse hole and make cave release and stress release, to realize deformation coal original position coal
The high-efficiency and continuous exploitation of layer gas provides basis.Operation of the present invention is simple, release effect is good.
In order to achieve the above object, the present invention adopts the following technical scheme that：A kind of coal bed gas horizontal well collapse hole is made cave and is unloaded
Press off extraction system, including liquid storage tank, abrasive can, abrasive material mixing arrangement, ground power unit and Downhole jetting device, abrasive material mixing
The entrance of device is connected to liquid storage tank and abrasive can respectively, exports and is connected to ground power unit entrance, ground power unit
Outlet is connected to Downhole jetting device, Downhole jetting device be located at horizontal well horizontal segment at well head, jet port is towards straight well；
Straight well and horizontal well are formed through U-shaped well, and the horizontal segment of horizontal well is located in coal seam.
A kind of coal bed gas horizontal well collapse hole makes cave release development approach, includes the following steps：
1) horizontal well and straight well are formed through U-shaped well and complete reaming to horizontal well horizontal segment and make cave barefoot completion；
2) connect the device in system, will under Downhole jetting device to horizontal well horizontal segment close to horizontal well uphole end,
The jet port of Downhole jetting device is towards straight well；
3) start abrasive material mixing arrangement, abrasive material mixing arrangement will enter excitation liquid therein and abrasive material is mixed and conveyed
Into ground power unit；
4) start ground power unit, high speed and high pressure fluid injected to horizontal well cave with the pulse frequency of certain pressure,
Sprayed from Downhole jetting device makes the Coal Seam Collapse in hole form release cave to horizontal segment Jing Dong, completes horizontal well pressure arteries and veins
Dynamic excitation and stress release；
5) stop the conveying grinding material into abrasive material mixing arrangement, increase the speed for spraying fluid into horizontal well, further break
It is broken, wash away coal dust, displacement solution-air-coal mixtures are migrated along discharge space to straight well；
5) mixture is promoted to by the ground further separating treatment of progress using lifting means and obtains coal bed gas.
Further, in step 1), hole diameter amplification is 200%-300% after horizontal well reaming.
Further, the release excitation range in step 4) after horizontal well pressure impulse excitation and stress release be greater than etc.
In 15 times of coal thickness.
The present invention will motivate the mixed of liquid and abrasive material after cave barefoot completion is made in horizontal well reaming, through ground power unit
Collaborate body to spray with certain frequency to delivered downhole and via Downhole jetting device, under the dissection of fluid-mixing, water
Coal Seam Collapse in horizontal well horizontal segment well hole forms release cave, realize deformation coal coal bed gas horizontal well pressure fluctuation excitation and
Stress release, stress relief zone, which extends, can be achieved lateral stress release range as 15 times of coal thickness or more；Stress of coal seam release is completed
Afterwards, ground face power device continues to realize waterpower displacement coal-liquid-gas mixture edge to delivered downhole high-voltage high-speed fluid and unload
It presses space to migrate to straight well section, provides guarantee for subsequent lifting.The present invention realizes deformation coal coal bed gas recovery ratio and exists
80% or more, there is the energy, safety and ecological significance very outstanding.
Detailed description of the invention
Fig. 1 is system schematic of the invention.
In figure：1, liquid storage tank, 2, straight well, 3, release cave, 4, horizontal well, 5, abrasive can, 6, abrasive material mixing arrangement, 7,
Face power device, 8, Downhole jetting device, 10, coal seam.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, a kind of coal bed gas horizontal well collapse hole makes cave release development system, including liquid storage tank 1, abrasive can 5,
Abrasive material mixing arrangement 6, ground power unit 7 and Downhole jetting device 8, the entrance of abrasive material mixing arrangement 6 respectively with liquid storage tank 1 and
The connection of abrasive can 5, outlet are connected to ground power unit 7 (high pressure pulse pump) entrance, the outlet and underground of ground power unit 7
Injection apparatus 8 is connected to, Downhole jetting device 8 be located at 4 horizontal segment of horizontal well at well head, jet port is towards straight well 2；Straight well 2
It is formed through U-shaped well with horizontal well 4, the horizontal segment of horizontal well 4 is located in coal seam 10.
A kind of coal bed gas horizontal well collapse hole makes cave release development approach, includes the following steps：
1) horizontal well 4 and straight well 2 are formed through U-shaped well and reaming are completed to 4 horizontal segment of horizontal well to make cave naked eye complete
Well；
2) device in system is connected, by lower 4 horizontal segment of horizontal well that arrives of Downhole jetting device 8 close to 4 well head of horizontal well
End, the jet port of Downhole jetting device 8 is towards straight well 2；
3) start abrasive material mixing arrangement 6, abrasive material mixing arrangement 6, which will enter excitation liquid therein and abrasive material, mix and defeated
It is sent in ground power unit 7；
4) start ground power unit 7, high speed and high pressure fluid injected to horizontal well cave with the pulse frequency of certain pressure,
It is sprayed from Downhole jetting device 8 to horizontal segment Jing Dong, the dissection of high speed and high pressure pulsating fluid makes the Coal Seam Collapse shape in hole
At release cave 3, completes 4 pressure fluctuation excitation of horizontal well and stress release, i.e. high-pressure pulsating artificial induction collapse hole are made cave and unloaded
Pressure；
5) stop the conveying grinding material into abrasive material mixing arrangement 6, increase the speed for spraying fluid into horizontal well 4, further
It is crushed, washes away coal dust, displacement solution-air-coal mixtures are migrated along discharge space to straight well 2；
5) mixture is promoted to by the ground further separating treatment of progress using lifting means and obtains coal bed gas.
In step 1), hole diameter amplification is 200%-300% after 4 reaming of horizontal well；Hole diameter amplification is bigger, is more avoided that construction
The problem of overburden deformation caused by coal is soft causes wellhole to collapse and leads to Jing Dong closing blocking, to construct coal seam in-situ coal seam
The continuous exploitation of gas provides guarantee.
Release excitation range in step 4) after horizontal well pressure impulse excitation and stress release is >=15 times of coal thickness；Guarantee
Limit of mining range, and then ensure that coal bed gas continuous high-efficient is exploited.
Claims (4)
1. a kind of coal bed gas horizontal well collapse hole makes cave release development system, which is characterized in that including liquid storage tank (1), abrasive can
(5), abrasive material mixing arrangement (6), ground power unit (7) and Downhole jetting device (8), the entrance point of abrasive material mixing arrangement (6)
It is not connected to liquid storage tank (1) and abrasive can (5), exports and be connected to ground power unit (7) entrance, ground power unit (7)
Outlet is connected to Downhole jetting device (8), and Downhole jetting device (8) is located at horizontal well (4) horizontal segment at well head, jet port
Towards straight well (2)；Straight well (2) and horizontal well (4) are formed through U-shaped well, and the horizontal segment of horizontal well (4) is located in coal seam (10).
2. a kind of coal bed gas horizontal well collapse hole makes cave release development approach, it is characterized in that：Include the following steps：
1) horizontal well (4) and straight well (2) are formed through U-shaped well and complete reaming to horizontal well (4) horizontal segment and make cave naked eye
Complete well；
2) device in system is connected, horizontal well (4) horizontal segment will be arrived under Downhole jetting device (8) close to horizontal well (4) well
Mouthful end, the jet port of Downhole jetting device (8) is towards straight well (2)；
3) start abrasive material mixing arrangement (6), abrasive material mixing arrangement (6), which will enter excitation liquid therein and abrasive material, mix and defeated
It is sent in ground power unit (7)；
4) start ground power unit (7), high speed and high pressure fluid is injected to horizontal well cave with the pulse frequency of certain pressure, by
Downhole jetting device (8) is sprayed makes the Coal Seam Collapse in hole form release cave (3) to horizontal segment Jing Dong, completes horizontal well (4)
Pressure fluctuation excitation and stress release；
5) stop increasing to abrasive material mixing arrangement (6) interior conveying grinding material the speed of the injection fluid into horizontal well (4), further
It is crushed, washes away coal dust, displacement solution-air-coal mixtures are migrated along discharge space to straight well (2)；
5) mixture is promoted to by the ground further separating treatment of progress using lifting means and obtains coal bed gas.
3. a kind of coal bed gas horizontal well collapse hole according to claim 2 makes cave release development approach, it is characterized in that：Step
1) in, hole diameter amplification is 200%-300% after horizontal well (4) reaming.
4. a kind of coal bed gas horizontal well collapse hole according to claim 2 or 3 makes cave release development approach, it is characterized in that：
Release excitation range in step 4) after horizontal well pressure impulse excitation and stress release is more than or equal to 15 times coal thickness.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402744.4A CN108825195A (en) | 2018-04-28 | 2018-04-28 | A kind of coal bed gas horizontal well collapse hole makes cave release development system and method |
| PCT/CN2018/110876 WO2019205517A1 (en) | 2018-04-28 | 2018-10-18 | Coalbed methane horizontal well hole collapse cave-building pressure relief developing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402744.4A CN108825195A (en) | 2018-04-28 | 2018-04-28 | A kind of coal bed gas horizontal well collapse hole makes cave release development system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108825195A true CN108825195A (en) | 2018-11-16 |
Family
ID=64147439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810402744.4A Pending CN108825195A (en) | 2018-04-28 | 2018-04-28 | A kind of coal bed gas horizontal well collapse hole makes cave release development system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108825195A (en) |
| WO (1) | WO2019205517A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339746A (en) * | 2018-12-07 | 2019-02-15 | 中国矿业大学 | A kind of roof delamination water cooperates with white-out method with coal measure gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400664A (en) * | 2011-09-03 | 2012-04-04 | 中煤科工集团西安研究院 | Well completion process method for increasing gas production of ground horizontally butted well of soft coal stratum |
| CN102518411A (en) * | 2011-12-29 | 2012-06-27 | 郑州大学 | Method for mining coal bed gas by hydraulic washout of butted well in manner of pressure relief |
| CN103603643A (en) * | 2013-11-26 | 2014-02-26 | 中国石油集团长城钻探工程有限公司 | Coal bed gas U-shaped well staged fracturing exploitation technology |
| US20140299311A1 (en) * | 1998-11-20 | 2014-10-09 | Effective Exploration, LLC | System and Method for Accessing Subterranean Deposits |
| CN104912520A (en) * | 2014-03-14 | 2015-09-16 | 郑州大学 | Horizontally butted well hydraulic scour migration pressure relief outburst elimination gas extraction method |
| CN105134162A (en) * | 2015-08-28 | 2015-12-09 | 中国神华能源股份有限公司 | U-shaped well system and drilling method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070062693A1 (en) * | 2005-09-21 | 2007-03-22 | Vetco Gray Inc. | System, method, and apparatus for degassing tool for coal bed methane gas wells |
| CN102425397A (en) * | 2011-12-29 | 2012-04-25 | 郑州大学 | Method for exploiting coal-bed methane by utilizing water force of horizontal pinnate well of double well-shaft to scour, drill and relieve pressure |
| CN102536302A (en) * | 2012-01-17 | 2012-07-04 | 河南省煤层气开发利用有限公司 | Method for relieving pressure and eliminating outburst of ground butting well |
| CN102966309B (en) * | 2012-12-03 | 2015-04-29 | 中国矿业大学 | High-pressure grinding material jet flow drill carriage device |
| CN104563990B (en) * | 2015-01-06 | 2018-04-20 | 中国矿业大学 | One kind bores blanking integration and heat injection cooperative reinforcing coal bed gas extraction method |
| CN104763462A (en) * | 2015-04-07 | 2015-07-08 | 中国矿业大学 | Method for extracting high-pressure hydraulic cave-manufacturing gas from rock roadway crossing hole |
-
2018
- 2018-04-28 CN CN201810402744.4A patent/CN108825195A/en active Pending
- 2018-10-18 WO PCT/CN2018/110876 patent/WO2019205517A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140299311A1 (en) * | 1998-11-20 | 2014-10-09 | Effective Exploration, LLC | System and Method for Accessing Subterranean Deposits |
| CN102400664A (en) * | 2011-09-03 | 2012-04-04 | 中煤科工集团西安研究院 | Well completion process method for increasing gas production of ground horizontally butted well of soft coal stratum |
| CN102518411A (en) * | 2011-12-29 | 2012-06-27 | 郑州大学 | Method for mining coal bed gas by hydraulic washout of butted well in manner of pressure relief |
| CN103603643A (en) * | 2013-11-26 | 2014-02-26 | 中国石油集团长城钻探工程有限公司 | Coal bed gas U-shaped well staged fracturing exploitation technology |
| CN104912520A (en) * | 2014-03-14 | 2015-09-16 | 郑州大学 | Horizontally butted well hydraulic scour migration pressure relief outburst elimination gas extraction method |
| CN105134162A (en) * | 2015-08-28 | 2015-12-09 | 中国神华能源股份有限公司 | U-shaped well system and drilling method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339746A (en) * | 2018-12-07 | 2019-02-15 | 中国矿业大学 | A kind of roof delamination water cooperates with white-out method with coal measure gas |
| CN109339746B (en) * | 2018-12-07 | 2020-08-25 | 中国矿业大学 | Roof separation layer water and coal-based gas collaborative dredging and discharging method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019205517A1 (en) | 2019-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2018113227A1 (en) | Electrical pulse blockage-removal and permeability increasing method for coal bed methane well | |
| CN105275443B (en) | A kind of underground coal mine high power electric detonation shake auxiliary hydraulic fracturing anti-reflection method | |
| CN101575983B (en) | Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof. | |
| WO2018201706A1 (en) | Method for efficient gas drainage in coal roadway strips and regional outburst elimination through staged fracturing with long borehole floor beddings | |
| CN104533452B (en) | A kind of underground coal mine crushes coal body stagewise grouting strengthening method | |
| CN105971663B (en) | A kind of the drilling arrangement and anti-reflection method of coal seam high-pressure hydraulic slot pressure break | |
| US9784086B2 (en) | Method and process for extracting shale oil and gas by fracturing and chemical retorting in oil shale in-situ horizontal well | |
| CN105298462A (en) | High-power electric knocking assisted hydrofracture coal seam permeability increase method for end-located drainage roadway | |
| CN101598030B (en) | Method for realizing fast coal exposing of coal seam rock cross with outburst danger | |
| WO2019205515A1 (en) | Method of extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity | |
| WO2019205516A1 (en) | System for extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity | |
| US20160069170A1 (en) | Method and process for extracting shale oil and gas by fracturing and chemical retorting in oil shale in-situ vertical well | |
| CN104632174A (en) | Coal seam liquid carbon dioxide fracturing device and method | |
| CN103032060A (en) | Continuous oil pipe hydraulic sanding blasting multi-cluster perforation annular sanding staged fracturing process for horizontal well | |
| CN105804786B (en) | A kind of weak seam bottom plate layer-through drilling pressure rushes anti-reflection method | |
| CN107152302A (en) | Cut the uniform permeability-increasing gas pumping method of pressure in a kind of complex geological structure coal seam | |
| CN204419145U (en) | Coal seam liquid carbon dioxide fracturing device | |
| CN105443098B (en) | A kind of coal mine down-hole drilling segmentation fixed point hydraulic fracturing pore-fixing device and method | |
| CN104213896A (en) | Fracturing and cavern integrated completion method for coal-bed gas reservoir | |
| CN104405394B (en) | Mining method | |
| CN107387049B (en) | Repeated fracturing method and system | |
| CN114352345B (en) | Low-permeability inclined coal seam coal and gas fluidization co-mining system and method | |
| CN110306961A (en) | It is a kind of along roof Floor water horizontal well drilling well staged fracturing method | |
| CN110029997A (en) | A kind of presplitting Sub-Level Caving method based on microwave hydrothermal effect | |
| CN103821489A (en) | Horizontal well mechanical layering and hydraulic jet fracture acidizing compound technique pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181116 |