CN104453801A - Composite coal-formed gas reservoir commingling production method and screen pipe special for same - Google Patents
Composite coal-formed gas reservoir commingling production method and screen pipe special for same Download PDFInfo
- Publication number
- CN104453801A CN104453801A CN201410176282.0A CN201410176282A CN104453801A CN 104453801 A CN104453801 A CN 104453801A CN 201410176282 A CN201410176282 A CN 201410176282A CN 104453801 A CN104453801 A CN 104453801A
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- CN
- China
- Prior art keywords
- coal seam
- coal
- outer tube
- mining
- screen
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title abstract 4
- 239000003245 coal Substances 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 238000005065 mining Methods 0.000 claims description 34
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 abstract description 6
- 239000011229 interlayer Substances 0.000 abstract description 4
- 238000003475 lamination Methods 0.000 abstract 1
- 239000003034 coal gas Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XTKDAFGWCDAMPY-UHFFFAOYSA-N azaperone Chemical compound C1=CC(F)=CC=C1C(=O)CCCN1CCN(C=2N=CC=CC=2)CC1 XTKDAFGWCDAMPY-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/14—Obtaining from a multiple-zone well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a composite coal-formed gas reservoir commingling production method and a screen pipe special for the composite coal-formed gas reservoir commingling production method. A hollow bridge plug is arranged between every two adjacent laminations in a well, ball plugging and pressure setting are carried out, a pipe column is lifted upwards, then the screen pipe special for coal bed gas draining and collection is put in and is placed onto the hollow bridge plug, two independent pipelines are arranged in the screen pipe special for coal bed gas draining and collection, a one-way valve is arranged between the two pipelines, coal layer isolation is achieved, and different-pressure liquid in the coal layers will not flee and are pumped out of the well at the same time. The screen pipe special for the composite coal-formed gas reservoir commingling production method is simple in structure and high in reliability, effectively prevents interlayer interference caused during coal bed gas draining and collection, and improves the yield of the coal-bed gas well.
Description
Technical field
The present invention relates to a kind of compound Coaliferous Gas Pool commingling production method and Special screen, belong to coal gas layer mining equipment technical field.
Background technology
In order to improve the well yield of coal bed gas, current China coal gas industry is while firm individual layer fracturing production pattern, carry out multiple seam pressure break and close the development mode exploration of adopting, exploration shows to compare individual layer fracturing developing pattern, multiple seam close adopt development mode there is no significant advantage, its main cause is that multiple seam closes mining coal seam gas well in mining desorption process, it (is namely that each coal pressure between layers is inconsistent that interlayer interference usually occurs, the hydraulic pressure of the water that lower floor extracts out in water pumping gas production process is made to be greater than the pressure in coal seam, upper strata, cause aqueous reflux as in coal seam, upper strata, certain interference is brought to the normal depressurization desorption in coal seam, upper strata, also cause certain reservoir damage simultaneously.
Summary of the invention
The object of the invention is: a kind of compound Coaliferous Gas Pool commingling production method and Special screen are provided, effectively can prevent interlayer interference, and then improve coal bed gas well yield, to overcome the deficiencies in the prior art.
Technical scheme of the present invention
A kind of compound Coaliferous Gas Pool commingling production method, hollow bridging plug is provided with between each coal seam in well, pitching is suppressed and is set, upper lifting pipe post again, then puts into coal bed gas extraction Special screen, and is placed on hollow bridging plug by mining Special screen, two are provided with pipeline independent of each other in this mining Special screen, and be provided with one way valve at these two pipeline enclosures, both realized the isolation between each coal seam, the liquid realizing again different pressure between each coal seam is not altered and simultaneously outside out well mutually.
In aforesaid compound Coaliferous Gas Pool commingling production method, the method realizing the isolation between each coal seam is closely cooperated by mining Special screen and hollow bridging plug.
In aforesaid compound Coaliferous Gas Pool commingling production method, the liquid realizing different pressure between each coal seam is not altered mutually and method simultaneously outside out well is by the separate structure of the inner and outer pipe of mining Special screen, outer tube is connected with coal seam, upper strata, interior pipe is connected with next coal seam, realize sealing at outer pipe bottom and interior pipe, between inner tube outlet place and outer tube, be provided with one way valve.
A kind of multiple seam closes mining coal seam gas well mining Special screen, comprise outer tube, outer tube is provided with screen sub one, be provided with pipe in baffle plate in bottom and penetrate in outer tube from outer tube bottom outlet, baffle plate and outer tube bottom outlet realize fitted seal, and one way valve to be arranged between interior pipe and outer tube and to be positioned on screen sub one.
Aforesaid multiple seam is closed in mining coal seam gas well mining Special screen, and end is connected with screen sub two under the baffle.
Aforesaid multiple seam is closed in mining coal seam gas well mining Special screen, and on the outer tube below screen sub one, cover has support ring.
Owing to adopting technique scheme, compared with prior art, the present invention by inner and outer pipe coal seam independent of each other to close in mining coal seam gas well mining Special screen and well hollow bridging plug with the use of, effectively can realize the isolation between each coal seam, the liquid realizing again different pressure between each coal seam is not altered mutually and simultaneously outside out well, structure is simple, and reliability is high, effectively prevent the interlayer interference phenomenon in coal bed gas extraction process, improve coal bed gas well yield.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is special screen construction schematic diagrames in the present invention.
Being labeled as in accompanying drawing: pipe, 3-outer tube, 4-screen sub one, 5-support ring, 6-sealing ring, 7-baffle plate, 8-screen sub two, 9-well, 10-coal seam, 11-hollow bridging plug in 1-one way valve, 2-.
Detailed description of the invention
Below in conjunction with accompanying drawing to the present invention with being described in further detail, but not as any limitation of the invention.
Embodiments of the invention: a kind of compound Coaliferous Gas Pool commingling production method of the present invention, hollow bridging plug is provided with between each coal seam in well, pitching is suppressed and is set, upper lifting pipe post again, then coal bed gas extraction Special screen is put into, and mining Special screen is placed on hollow bridging plug, two are provided with pipeline independent of each other in this mining Special screen, and be provided with one way valve at these two pipeline enclosures, to be closely cooperated the isolation realized between each coal seam by mining Special screen and hollow bridging plug, by in mining Special screen, the separate structure of outer tube, outer tube is connected with coal seam, upper strata, interior pipe is connected with next coal seam, realize sealing at outer pipe bottom and interior pipe, not alter mutually from the liquid being provided with one way valve between outer tube and realizing different pressure between each coal seam at inner tube outlet place and simultaneously outside out well.
A kind of multiple seam closes mining coal seam gas well mining Special screen, as shown in drawings, comprise outer tube 3, outer tube 3 is provided with screen sub 1, is provided with pipe 2 in baffle plate 7 penetrates in outer tube 3 from outer tube 3 bottom outlet in bottom, baffle plate 7 and outer tube 3 bottom outlet realize fitted seal, screen sub 28 is connected with in baffle plate 7 lower end, one way valve 1 to be arranged between interior pipe 2 and outer tube 3 and to be positioned on screen sub 1, and on the outer tube 3 below screen sub 1, cover has support ring 5, is provided with sealing ring 6 below support ring 5.
Concrete using method:
Step one, excavated well after in well under enter hollow bridging plug, hollow bridging plug is arranged between each coal seam;
Step 2, pitching are suppressed and are set, then upper lifting pipe post;
Step 3, put into coal bed gas extraction Special screen, and mining Special screen is placed on hollow bridging plug.
During work, the match of hollow bridge, support ring and sealing ring effective packing coal seam, liquid between adjacent coal bed can not be flowed mutually, the liquid in next coal seam flows in outer tube upper end by interior pipe simultaneously, coal seam, upper strata flows in outer tube by screen sub one, because being provided with one way valve between inner and outer pipe, making the liquid in interior pipe oppositely can not flow into the outer tube of screen sub one, namely ensure that the liquid that laminated is powerful can not flow in coal seam, upper strata to destroy coal seam, upper strata.
Claims (7)
1. a compound Coaliferous Gas Pool commingling production method, it is characterized in that: between each coal seam in well, be provided with hollow bridging plug, pitching is suppressed and is set, upper lifting pipe post again, then puts into coal bed gas extraction Special screen, and is placed on hollow bridging plug by mining Special screen, two are provided with pipeline independent of each other in this mining Special screen, and be provided with one way valve at these two pipeline enclosures, both realized the isolation between each coal seam, the liquid realizing again different pressure between each coal seam is not altered and simultaneously outside out well mutually.
2. compound Coaliferous Gas Pool commingling production method according to claim 1, is characterized in that: the method realizing the isolation between each coal seam is closely cooperated by mining Special screen and hollow bridging plug.
3. compound Coaliferous Gas Pool commingling production method according to claim 1, it is characterized in that: the liquid realizing different pressure between each coal seam is not altered mutually and method simultaneously outside out well is by the separate structure of the inner and outer pipe of mining Special screen, outer tube is connected with coal seam, upper strata, interior pipe is connected with next coal seam, realize sealing at outer pipe bottom and interior pipe, between inner tube outlet place and outer tube, be provided with one way valve.
4. a multiple seam closes mining coal seam gas well mining Special screen, comprise outer tube (3), outer tube (3) is provided with screen sub one (4), it is characterized in that: the interior pipe (2) being provided with baffle plate (7) in bottom penetrates in outer tube (3) from outer tube (3) bottom outlet, baffle plate (7) and outer tube (3) bottom outlet realize fitted seal, and one way valve (1) to be arranged between interior pipe (2) and outer tube (3) and to be positioned on screen sub one (4).
5. multiple seam according to claim 4 closes mining coal seam gas well mining Special screen, it is characterized in that: be connected with screen sub two (8) in baffle plate (7) lower end.
6. multiple seam according to claim 4 closes mining coal seam gas well mining Special screen, it is characterized in that: have support ring (5) at the upper cover of the outer tube (3) of screen sub one (4) below.
7. multiple seam according to claim 6 closes mining coal seam gas well mining Special screen, it is characterized in that: be provided with sealing ring (6) in support ring (5) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410176282.0A CN104453801A (en) | 2014-04-29 | 2014-04-29 | Composite coal-formed gas reservoir commingling production method and screen pipe special for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410176282.0A CN104453801A (en) | 2014-04-29 | 2014-04-29 | Composite coal-formed gas reservoir commingling production method and screen pipe special for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104453801A true CN104453801A (en) | 2015-03-25 |
Family
ID=52900476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410176282.0A Pending CN104453801A (en) | 2014-04-29 | 2014-04-29 | Composite coal-formed gas reservoir commingling production method and screen pipe special for same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104453801A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2837506Y (en) * | 2005-03-16 | 2006-11-15 | 中国石化胜利油田有限公司采油工艺研究院 | Pipe string for stratified oil production in electric pump well |
| CN201165866Y (en) * | 2008-03-04 | 2008-12-17 | 北京华油油气技术开发有限公司 | Horizontal well separate mining and combined mining pipe column |
| CN201416430Y (en) * | 2009-01-16 | 2010-03-03 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Hydraulic controlled type concentric dual-pipe separate injection pipe string |
| CN201474673U (en) * | 2009-08-19 | 2010-05-19 | 中国石油天然气股份有限公司 | Oil production pipe column for sectional water control of horizontal well |
| CN201679489U (en) * | 2010-01-22 | 2010-12-22 | 中国石油化工股份有限公司 | Double-pipe separated injection safety production pipe column |
| CN201857942U (en) * | 2010-08-05 | 2011-06-08 | 中国石油化工股份有限公司 | Integrated tubular column capable of realizing layered sand prevention and layered oil production |
| CN103161432A (en) * | 2011-12-12 | 2013-06-19 | 中国石油化工股份有限公司 | Lifting type layered oil production tubular column |
| CN203822271U (en) * | 2014-04-29 | 2014-09-10 | 贵州省煤层气页岩气工程技术研究中心 | Special-purpose sieve tube for drainage and gas production of multi-seam commingling coal-bed gas well |
-
2014
- 2014-04-29 CN CN201410176282.0A patent/CN104453801A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2837506Y (en) * | 2005-03-16 | 2006-11-15 | 中国石化胜利油田有限公司采油工艺研究院 | Pipe string for stratified oil production in electric pump well |
| CN201165866Y (en) * | 2008-03-04 | 2008-12-17 | 北京华油油气技术开发有限公司 | Horizontal well separate mining and combined mining pipe column |
| CN201416430Y (en) * | 2009-01-16 | 2010-03-03 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Hydraulic controlled type concentric dual-pipe separate injection pipe string |
| CN201474673U (en) * | 2009-08-19 | 2010-05-19 | 中国石油天然气股份有限公司 | Oil production pipe column for sectional water control of horizontal well |
| CN201679489U (en) * | 2010-01-22 | 2010-12-22 | 中国石油化工股份有限公司 | Double-pipe separated injection safety production pipe column |
| CN201857942U (en) * | 2010-08-05 | 2011-06-08 | 中国石油化工股份有限公司 | Integrated tubular column capable of realizing layered sand prevention and layered oil production |
| CN103161432A (en) * | 2011-12-12 | 2013-06-19 | 中国石油化工股份有限公司 | Lifting type layered oil production tubular column |
| CN203822271U (en) * | 2014-04-29 | 2014-09-10 | 贵州省煤层气页岩气工程技术研究中心 | Special-purpose sieve tube for drainage and gas production of multi-seam commingling coal-bed gas well |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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: 20150325 |