CN108716396A - A kind of development approach of coal bed gas multiple-limb distal end connected well - Google Patents
A kind of development approach of coal bed gas multiple-limb distal end connected well Download PDFInfo
- Publication number
- CN108716396A CN108716396A CN201810292530.6A CN201810292530A CN108716396A CN 108716396 A CN108716396 A CN 108716396A CN 201810292530 A CN201810292530 A CN 201810292530A CN 108716396 A CN108716396 A CN 108716396A
- Authority
- CN
- China
- Prior art keywords
- well
- distal end
- cave
- drilling
- bed gas
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000011161 development Methods 0.000 title claims abstract description 19
- 238000013459 approach Methods 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 238000013461 design Methods 0.000 claims abstract description 26
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 9
- 210000002445 nipple Anatomy 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 3
- 230000005307 ferromagnetism Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
- E21B47/0228—Determining slope or direction of the borehole, e.g. using geomagnetism using electromagnetic energy or detectors therefor
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to Coal-seam Gas Recovery Technologies fields, are related to a kind of development approach of coal bed gas multiple-limb distal end connected well, specifically include following steps：1) exploitation is drilled into design surface pipe depth with Φ 311.1mm drill bits, and the unstable leakiness in tripping in Φ 244.5mm casing sealing top, easily collapse interval；2) two exploitations are drilled into design target spot with Φ 215.9mm drill bits, and hole angle reaches 84 °, and tripping in Φ 177.8mm intermediate casing cementings insulate leakiness stratum；3) it three opens lower curved section design target spot is drilled into using Φ 155.6mm drill bits；4) each branch's well section is drilled into corresponding design target spot using Φ 155.69mm drill bits successively.The multi-branched horizontal well of the present invention improves flow conductivity, increases sweep area, substantially increase well yield compared with straight well, horizontal well；The present invention is used along reservoir downdip direction drilling well, is conducive to hole trajectory control, is conducive to the water in coal seam and by gravity flows into producing well shaft bottom, improves the water pumping gas production efficiency of producing well.
Description
Technical field
The present invention relates to Coal-seam Gas Recovery Technologies fields, and in particular to a kind of exploitation of coal bed gas multiple-limb distal end connected well
Method.
Background technology
The problem that Drilling ratio is low, recovery ratio is low is primarily present during coal-bed gas exploitation, and simple structure well development is imitated
Rate is lower, and therefore, it is necessary to design the producing well for capableing of Efficient Development according to the geology characteristic of coal bed gas by drilling engineering.
The prior art uses straight well development plan, arranges that multiple wells form well pattern in coal bed gas block, increases
The quantity of well is added, operating cost is high, and development efficiency is low；Another scheme is connected to using horizontal well and straight well, considers that draining is adopted
The problem of gas is the improvement to original scheme, but to involve range small for oil gas harvesting, still up for carrying in terms of recovery ratio
It is high.In general, the prior art is not high for the well yield of coal-bed gas exploitation.
Invention content
For problems of the prior art, the object of the present invention is to provide a kind of coal bed gas multiple-limb distal end connected wells
Development approach.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of development approach of coal bed gas multiple-limb distal end connected well, specifically includes following steps：
1) exploitation is drilled into design surface pipe depth, tripping in Φ 244.5mm casing sealing top with Φ 311.1mm drill bits
Unstable leakiness, easily collapse interval, and using interior tube method well shaft fixing technology, cement mortar returns to ground, establishes well head, installs preventer；
2) two exploitations are drilled into design target spot with Φ 215.9mm drill bits, and hole angle reaches 84 °, tripping in Φ 177.8mm technology sets
Pipe well cementation packing leakiness stratum；
3) it three opens lower curved section design target spot is drilled into using Φ 155.6mm drill bits；
4) each branch's well section is drilled into corresponding design target spot using Φ 155.69mm drill bits successively；
5) the lower depth of each layer casing presses design principle, is corrected with the real depth of stratum that bores.
Engineering well is multilateral well, and producing well is cave straight well, and multi-branched horizontal well is crept into along reservoir downdip direction
's.
The technical program advanced optimizes, and multiple-limb distal end connected well is that multi-branched horizontal well and distal end cave are straight
The connected well of well connection.
The technical program advanced optimizes, and the connection technique of the multilateral well and cave straight well is：
1) when ring water receiving horizontal well is crept into away from cave straight well at a distance of 50~60m, in cave straight well tripping in ferromagnetism rangefinder
Device, horizontal well tripping in track the strong magnetic connector of pipe nipple；
2) data provided according to instrument carry out track adjustment, and drilling trajectory is made to collide with connectivity points；
3) often 3~5m of drilling carries out trajectory measurement, adjusts tool-face in time and carries out hole trajectory control；
4) using no magnetic short section, minimize shaft bottom to MWD measurement points distance；
5) near Horizontal Well Drilling to cave, the vertical depth of track should be located at the middle part or middle and upper part in cave, can if connection failure
Further sidetracking looks for cave.
The technical program advanced optimizes, and the control method that the multilateral well is connected to cave straight well is：
1) three open after, the lower electromagnetic generator in the straight well of cave, in horizontal well MWD tripping in track pipe nipple；
2) electromagnetic generator sends out at times strong and at other times weak signal, is sent in MWD after being received by the pipe nipple that tracks, then by
MWD is sent in drilling fluid；
3) reception device on ground is returned from above in drilling fluid receive pulse signal after reconvert at electric signal, be shown in
Certain electromagnetic sensing line is formed in the computer of surface personnel, thus judges orientation between drilling tool and cave well；
4) often 3~5m of drilling carries out trajectory measurement, adjusts tool-face in time and carries out hole trajectory control；
5) estimated to stop creeping into away from straight well cave 2~3m horizontal wells, instrument is risen by straight well, and shaft collar is crack, main shaft
Eye continues to creep into, drilling process occur pump pressure decline, well head not return mud, straight well well head have liquid discharge phenomenon indicate connection at
Work(.
The technical program advanced optimizes, the drill assembly critical piece used in the step 1) of the connection technique
For：Drill bit+motor+MWD+ non magnetic drill collars+drilling rod.
The technical program advanced optimizes, 10 meters of left sides of the continuous drilling of connection successful subsequent in the step 5) of the control method
Strong magnetic connector is got rid of in the right side, trip-out.
The technical program advanced optimizes, and the main borehole of the connected well is used along reservoir downdip direction drilling well.
The technical program advanced optimizes, and the connected well carries out three-dimensional borehole track according to design parameter and draws, can
With according to the increase and decrease for carrying out branch well hole quantity the case where reservoir.
The beneficial effects of the present invention are：
(1) multi-branched horizontal well of the invention improves flow conductivity, increases spread area compared with straight well, horizontal well
Product, substantially increases well yield；
(2) present invention is conducive to hole trajectory control, the water be conducive in coal seam exists using along reservoir downdip direction drilling well
It is flowed into producing well shaft bottom under gravity, improves the water pumping gas production efficiency of producing well.
(3) characteristic multilateral well of the invention can greatly improve well yield for coal-bed gas exploitation, for the whole nation
The exploitation of coal bed gas has reference, can preferably meet state's domestic demand under the energy development requirement of " subtract coal, protect oil, increase gas "
It asks.
Description of the drawings
Fig. 1 is the artwork of the present invention；
Fig. 2 is the structure chart of multi-branched horizontal well and distal end straight well well bore in analog block of the present invention；
Fig. 3 is that the design data for the connected well that multi-branched horizontal well of the present invention is connected to distal end straight well is drawn；
Wherein, the cave straight well that a is horizontal well main borehole, distal end is connected to, b are each branch well hole.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of development approach of coal bed gas multiple-limb distal end connected well, specifically includes following steps：
(1) one exploitation is drilled into design surface pipe depth, lower Φ 244.5mm casing sealing top with Φ 311.1mm drill bits
Unstable leakiness, easily collapse interval, and using interior tube method well shaft fixing technology, cement mortar returns to ground, establishes well head, installs preventer, with
Guarantee two, which drives a well, controls requirement and smooth construction.
(2) two exploitations are drilled into design target spot with Φ 215.9mm drill bits, and hole angle reaches 84 °, tripping in Φ 177.8mm technologies
Casing cementing insulates leakiness stratum, opens net horizontal section safe construction for three and provides advantage, construction risk.
(3) three open lower curved section is drilled into design target spot using Φ 155.6mm drill bits.
(4) each branch's well section is drilled into corresponding design target spot using Φ 155.69mm drill bits successively.
(5) the lower depth of each layer casing presses design principle, is corrected with the real depth of stratum that bores.
Engineering well is multilateral well, and producing well is cave straight well, and multi-branched horizontal well is crept into along reservoir downdip direction
's.
The multiple-limb distal end connected well of the present invention is the connected well that multi-branched horizontal well is connected to distal end cave straight well.
As shown in Fig. 1~2, the connection technique of the multilateral well and cave straight well is：
(1) when ring water receiving horizontal well is crept into away from cave straight well at a distance of 50~60m, in cave straight well tripping in ferromagnetism rangefinder
Device, horizontal well tripping in track the strong magnetic connector of pipe nipple, and drill assembly critical piece is：Drill bit+motor+MWD+ non magnetic drill collars+drilling rod；
(2) data provided according to instrument carry out track adjustment, and drilling trajectory is made to collide with connectivity points；
(3) often 3~5m of drilling carries out trajectory measurement, adjusts tool-face in time and carries out hole trajectory control；
(4) using no magnetic short section, minimize shaft bottom to MWD measurement points distance；
(5) near Horizontal Well Drilling to cave, the vertical depth of track should not be located at the lower part in cave, should be located at the middle part in cave
Or middle and upper part.If connection failure, further cave can be looked for by sidetracking.If being located at lower part, increasing hole angle sidetracking is difficult, is unfavorable for taking follow-up
Measure.
As shown in Fig. 1~2, the control method that the multilateral well is connected to cave straight well is：
After (1) three opens, the lower electromagnetic generator in the well of cave, in horizontal well MWD tripping in track pipe nipple；
(2) electromagnetic generator sends out at times strong and at other times weak signal, is sent in MWD after being received by the pipe nipple that tracks, then by
MWD is sent in drilling fluid；
(3) reception device on ground is returned from above in drilling fluid receive pulse signal after reconvert at electric signal, display
Certain electromagnetic sensing line is formed in the computer of surface personnel, thus judges orientation between drilling tool and cave well；
(4) often 3~5m of drilling carries out trajectory measurement, adjusts tool-face in time and carries out hole trajectory control；
(5) estimated 2~3 meters away from straight well cave horizontal wells stop drilling, and instrument is risen by straight well, and shaft collar is crack, main
Wellbore continues to creep into, and pump pressure decline, well head not return mud occurs in drilling process, and straight well well head has liquid discharge phenomenon to indicate connection
Success.Continue 10 meters or so of drilling after connection, strong magnetic connector is got rid of in trip-out.
The main borehole of connected well of the present invention is used along reservoir downdip direction drilling well.
The design data for the connected well that multi-branched horizontal well as shown in Figure 3 is connected to distal end straight well is drawn, and track is passed through
(Track desigh data determine vertical depth, N coordinates, E coordinates, hole deviation to design data according to specific block, specific bed gas reservoir
Angle, direction of deflection etc.), draw out the visualized graphs of three-dimensional borehole track.Connected well of the present invention carries out three according to design parameter
Borehole track is tieed up to draw, it can be according to the increase and decrease for carrying out branch well hole quantity the case where reservoir.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of development approach of coal bed gas multiple-limb distal end connected well, which is characterized in that specifically include following steps：
1) exploitation is drilled into design surface pipe depth with Φ 311.1mm drill bits, and tripping in Φ 244.5mm casing sealing top is unstable
Determine leakiness, easily collapse interval, using interior tube method well shaft fixing technology, cement mortar returns to ground, establishes well head, installs preventer；
2) two exploitations are drilled into design target spot with Φ 215.9mm drill bits, and hole angle reaches 84 °, and tripping in Φ 177.8mm protective casings are solid
Well insulates leakiness stratum；
3) it three opens lower curved section design target spot is drilled into using Φ 155.6mm drill bits；
4) each branch's well section is drilled into corresponding design target spot using Φ 155.69mm drill bits successively；
5) the lower depth of each layer casing presses design principle, is corrected with the real depth of stratum that bores.
2. a kind of development approach of coal bed gas multiple-limb distal end according to claim 1 connected well, which is characterized in that described
Multiple-limb distal end connected well is the connected well that multi-branched horizontal well is connected to distal end cave straight well.
3. a kind of development approach of coal bed gas multiple-limb distal end according to claim 2 connected well, which is characterized in that described
The connection technique of multilateral well and cave straight well is：
1) when ring water receiving horizontal well is crept into away from cave straight well at a distance of 50~60m, in cave straight well tripping in ferromagnetism distance mearuring equipment, water
Horizontal well tripping in tracks the strong magnetic connector of pipe nipple；
2) data provided according to instrument carry out track adjustment, and drilling trajectory is made to collide with connectivity points；
3) often 3~5m of drilling carries out trajectory measurement, adjusts tool-face in time and carries out hole trajectory control；
4) using no magnetic short section, minimize shaft bottom to MWD measurement points distance；
5) near Horizontal Well Drilling to cave, the vertical depth of track should be located at the middle part or middle and upper part in cave, can be into one if connection failure
Step sidetracking looks for cave.
4. a kind of development approach of coal bed gas multiple-limb distal end according to claim 3 connected well, which is characterized in that described
The control method that multilateral well is connected to cave straight well is：
1) three open after, the lower electromagnetic generator in the straight well of cave, in horizontal well MWD tripping in track pipe nipple；
2) electromagnetic generator sends out at times strong and at other times weak signal, is sent in MWD after being received by the pipe nipple that tracks, then sent out by MWD
It is sent in drilling fluid；
3) reception device on ground is returned from above in drilling fluid receive pulse signal after reconvert at electric signal, be shown in ground
Certain electromagnetic sensing line is formed in the computer of staff, thus judges orientation between drilling tool and cave well；
4) often 3~5m of drilling carries out trajectory measurement, adjusts tool-face in time and carries out hole trajectory control；
5) estimated to stop creeping into away from straight well cave 2~3m horizontal wells, instrument is risen by straight well, and shaft collar is crack, main borehole after
There is pump pressure decline, well head not return mud in continuous drilling, drilling process, and straight well well head has liquid discharge phenomenon expression to be connected to successfully.
5. a kind of development approach of coal bed gas multiple-limb distal end according to claim 3 connected well, which is characterized in that described
Being connected to the drill assembly critical piece used in the step 1) of technique is：Drill bit+motor+MWD+ non magnetic drill collars+drilling rod.
6. a kind of development approach of coal bed gas multiple-limb distal end according to claim 4 connected well, which is characterized in that described
Strong magnetic connector is got rid of in continuous 10 meters or so of the drilling of connection successful subsequent, trip-out in the step 5) of control method.
7. according to a kind of development approach of coal bed gas multiple-limb of claim 1~6 any one of them distal end connected well, feature
It is, the main borehole of the connected well is used along reservoir downdip direction drilling well.
8. a kind of development approach of coal bed gas multiple-limb distal end according to claim 1 or 2 connected well, which is characterized in that
The connected well carries out three-dimensional borehole track according to design parameter and draws, can be according to progress branch well hole quantity the case where reservoir
Increase and decrease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292530.6A CN108716396A (en) | 2018-03-30 | 2018-03-30 | A kind of development approach of coal bed gas multiple-limb distal end connected well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292530.6A CN108716396A (en) | 2018-03-30 | 2018-03-30 | A kind of development approach of coal bed gas multiple-limb distal end connected well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108716396A true CN108716396A (en) | 2018-10-30 |
Family
ID=63898687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810292530.6A Pending CN108716396A (en) | 2018-03-30 | 2018-03-30 | A kind of development approach of coal bed gas multiple-limb distal end connected well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108716396A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736769A (en) * | 2019-01-15 | 2019-05-10 | 中国矿业大学 | A kind of frozen soil layer gas hydrates horizontal branch well pattern mining system and method |
| CN111043780A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工集团公司 | Hydrothermal multi-branch directional mining and grouting geothermal well and construction method |
| CN112343555A (en) * | 2020-11-24 | 2021-02-09 | 中国海洋石油集团有限公司 | Relay well development method for expanding offshore oil and gas reserve utilization range |
| CN112377168A (en) * | 2020-11-11 | 2021-02-19 | 中联煤层气有限责任公司 | Coal bed gas multi-branch horizontal well suitable for tectonic coal and drilling method |
| CN114198016A (en) * | 2021-12-31 | 2022-03-18 | 北京派创石油技术服务有限公司 | Geothermal closed-loop working medium circulating exploitation method |
| CN116025328A (en) * | 2022-11-25 | 2023-04-28 | 中国地质大学（武汉） | Stacked horizontal well gas production system with inclined-vertical gas bearing layers and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203334956U (en) * | 2013-05-31 | 2013-12-11 | 华北石油管理局 | Multi-branch horizontal well system suitable for coalbed methane of uniclinal structure |
| CN104481495A (en) * | 2014-11-05 | 2015-04-01 | 辽宁石油化工大学 | Coalbed methane (CBM) cluster double multi-branch horizontal well and drilling method relative to discharging and mining vertical well system |
| WO2015157812A1 (en) * | 2014-04-14 | 2015-10-22 | Peabody Energy Australia | A multi purpose drilling system and 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 |
-
2018
- 2018-03-30 CN CN201810292530.6A patent/CN108716396A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203334956U (en) * | 2013-05-31 | 2013-12-11 | 华北石油管理局 | Multi-branch horizontal well system suitable for coalbed methane of uniclinal structure |
| WO2015157812A1 (en) * | 2014-04-14 | 2015-10-22 | Peabody Energy Australia | A multi purpose drilling system and method |
| CN104481495A (en) * | 2014-11-05 | 2015-04-01 | 辽宁石油化工大学 | Coalbed methane (CBM) cluster double multi-branch horizontal well and drilling method relative to discharging and mining vertical well system |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 吴彬彬: "晋平2井组煤层气羽状多分支水平井钻井工程设计与实践", 《中国优秀硕士学位论文全文数据库 工程科技 1辑》 * |
| 邓钧耀 等: "水平连通井关键技术及在三交地区的应用", 《2011年煤层气学术研讨会论文集》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043780A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工集团公司 | Hydrothermal multi-branch directional mining and grouting geothermal well and construction method |
| CN111043780B (en) * | 2018-10-11 | 2021-12-24 | 中国石油化工集团公司 | Hydrothermal multi-branch directional mining and grouting geothermal well and construction method |
| CN109736769A (en) * | 2019-01-15 | 2019-05-10 | 中国矿业大学 | A kind of frozen soil layer gas hydrates horizontal branch well pattern mining system and method |
| CN112377168A (en) * | 2020-11-11 | 2021-02-19 | 中联煤层气有限责任公司 | Coal bed gas multi-branch horizontal well suitable for tectonic coal and drilling method |
| CN112377168B (en) * | 2020-11-11 | 2023-03-10 | 中联煤层气有限责任公司 | Coal bed gas multi-branch horizontal well suitable for tectonic coal and drilling method |
| CN112343555A (en) * | 2020-11-24 | 2021-02-09 | 中国海洋石油集团有限公司 | Relay well development method for expanding offshore oil and gas reserve utilization range |
| CN112343555B (en) * | 2020-11-24 | 2022-11-18 | 中国海洋石油集团有限公司 | Relay well development method for expanding offshore oil and gas reserve utilization range |
| CN114198016A (en) * | 2021-12-31 | 2022-03-18 | 北京派创石油技术服务有限公司 | Geothermal closed-loop working medium circulating exploitation method |
| CN116025328A (en) * | 2022-11-25 | 2023-04-28 | 中国地质大学（武汉） | Stacked horizontal well gas production system with inclined-vertical gas bearing layers and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108716396A (en) | A kind of development approach of coal bed gas multiple-limb distal end connected well | |
| EP1440220B1 (en) | An entry well with slanted well bores and method | |
| US6425448B1 (en) | Method and system for accessing subterranean zones from a limited surface area | |
| CN106285617B (en) | Gas water horizontal well completion method | |
| CN104533288B (en) | A kind of fish spicule shape multilevel branch horizontal well shale gas reservoir that bores is drilled the method that well is with increasing production | |
| CN113738317A (en) | Method for combined exploitation of deep coal bed gas and dry hot rock type geothermal | |
| US6932168B2 (en) | Method for making a well for removing fluid from a desired subterranean formation | |
| AU2002251776A1 (en) | Method and system for accessing subterranean zones from a limited surface area | |
| RU2682288C2 (en) | Multilateral access with real-time data transmission | |
| AU2002349947A1 (en) | An entry well with slanted well bores and method | |
| CN110397428A (en) | A kind of gas displacing coal-bed method for increasing of straight well and U-shaped butt shaft unitized production coal bed gas | |
| US20140231072A1 (en) | Method and system of planning and/or drilling wellbores | |
| US10077643B2 (en) | Method of completing and producing long lateral wellbores | |
| CN104612691B (en) | Single borehole multilateral directional butted well salt mining method | |
| CN102852490A (en) | High gas suction and discharge process method for complex well | |
| CN105283633A (en) | Method for increasing product recovery in fractures proximate fracture treated wellbores | |
| CN110043229A (en) | A kind of more well group connection convergence recovery methods of Gas Hydrate In Sea Areas | |
| CN105952378A (en) | Tree-shape structure well drilling and completion and yield increasing method | |
| Shelkholeslami et al. | Drilling and production aspects of horizontal wells in the Austin Chalk | |
| CN107060642A (en) | Horizontal well track control method being connected trona deep-thin layer more | |
| US20170058646A1 (en) | Deepwater extended reach hardrock completions | |
| CN105986792A (en) | Method for increasing recovery ratio of shallow layer reservoir | |
| CN107605485A (en) | A kind of directional well is combined with subduction electric pump adopts salt method | |
| Jorgensen | Liner-based stimulation technology without fracturing proven in field | |
| Surjaatmadja et al. | Selective placement of fractures in horizontal wells in offshore Brazil demonstrates effectiveness of hydrajet stimulation process |
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: 20181030 |