CN102852490A - High gas suction and discharge process method for complex well - Google Patents
High gas suction and discharge process method for complex well Download PDFInfo
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- CN102852490A CN102852490A CN201210330506XA CN201210330506A CN102852490A CN 102852490 A CN102852490 A CN 102852490A CN 201210330506X A CN201210330506X A CN 201210330506XA CN 201210330506 A CN201210330506 A CN 201210330506A CN 102852490 A CN102852490 A CN 102852490A
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Abstract
An embodiment of the invention discloses a high gas suction and discharge process method for a complex well. The process method includes the steps: A, drilling a straight well or a directional well on the ground; B, drilling a branch horizontal well on the ground, wherein the branch horizontal well is communicated with the straight well or the directional well; and C, sucking and discharging gas in the straight well or the directional well. The straight well or the directional well is drilled on the ground, and then the branch horizontal well is drilled on the ground and communicated with the straight well or the directional well, so that an approximately communicated closed-loop complex well network is formed to be communicated with a coal bed fissure system, coal bed gas pressure is quickly reduced, coal bed gas is sucked and discharged, and a foundation is laid for safety production of high gas coal mines.
Description
Technical field
The present invention relates to safety of coal mines exploitation and cbm development field, also relate to petroleum works directional well and horizontal well drilling field of engineering technology, particularly relate to the high device in Gas process of a kind of complex structural well extraction, it can be used for the colliery that content gas tolerance is high, pressure is higher, it is good also to can be used for the roof mechanical stability, the coal seam distribution uniform is without larger tomography or the colliery of karst collapse col umn.
Background technology
The conventional high gassy method of drawing out methane has two kinds at present:
A kind of is coal seam or top board brill lateral aperture under mine, and borehole length, borehole diameter are subject to larger limitation, and extraction is very slow, and gas drainage under suction efficient is on the low side;
Another kind is to open adit at seat earth, exploits the high gassy in top again, utilizes the limit to adopt superjacent, and the base plate limit caves in, the mode of limit extraction, and cost is high, and the time is long.
Summary of the invention
The objective of the invention is, provide a kind of complex structural well extraction high device in Gas process, it is to utilize conventional oil directional well, horizontal well drilling engineering, at approximate branch horizontal well net and straight well or the directional well that is interconnected of coal seam drilling, realize three-dimensional the communication, improve the gas drainage under suction efficient of high gassy.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The high device in Gas process of a kind of complex structural well extraction, it comprises the steps: A, ground drilling straight-hole or directional well; Branch horizontal well is bored on B, ground, and described branch horizontal well is connected with above-mentioned straight well or directional well; C, draw out methane at the well head of straight well or directional well.
The high device in Gas process of aforesaid complex structural well extraction among the above-mentioned steps A, with the described straight well of bit drills or directional well, makes straight well or directional well pass seat earth, then lower production casing well cementation in straight well or directional well.
The high device in Gas process of aforesaid complex structural well extraction, the branch horizontal well among the above-mentioned steps B comprises a plurality of main horizontal holes, is drilled with a plurality of branch well holes at main horizontal hole, adjacent main horizontal hole is interconnected by branch well hole.
The high device in Gas process of aforesaid complex structural well extraction, described straight well or directional well are communicated with described main horizontal hole.
The high device in Gas process of aforesaid complex structural well extraction, above-mentioned steps B also comprises the steps: B1, opens drilled straight well; B2, continue out the directed drilling section from the straight well section; B3, open net horizontal section from the directed drilling section, described net horizontal section is communicated with the directed drilling section, and net horizontal section is communicated with above-mentioned straight well or directional well.
Characteristics and the advantage of the embodiment of the invention are:
1, it is first at ground drilling straight-hole or directional well, then bore branch horizontal well, and branch horizontal well is connected with straight well or directional well, form the complicated well pattern of the approximate closed loop that is communicated with, link up the fissure system in coal seam, reach the fast reducing coal-bed gas pressure, the extraction coal-bed gas is for the safety in production of high gassy lays the foundation.
2, its pressure release of can fixing a point in the coal seam can be applicable to the high gas drainage under suction in colliery and coal-bed gas exploitation field.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the high device in Gas process of the complex structural well extraction of embodiment of the invention institute drilling well location map.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention has proposed the high device in Gas process of a kind of complex structural well extraction, and it comprises the steps:
A, ground drilling straight-hole or directional well 1;
Branch horizontal well is bored on B, ground, and described branch horizontal well is connected with above-mentioned straight well or directional well;
C, draw out methane at the well head of straight well or directional well, for example at well head specific suction pump draining coal seam gas gas is installed.
In the present embodiment, first at ground drilling straight-hole or directional well, then bore branch horizontal well, and branch horizontal well is connected with straight well or directional well, form the complicated well pattern of the approximate closed loop that is communicated with, three-dimensional fissure system of linking up the coal seam reaches the fast reducing coal-bed gas pressure, the extraction coal-bed gas is for the safety in production of high gassy lays the foundation.And gas tolerance and gas pressure are higher, and the extraction effect is better.
The purpose of the above-mentioned straight well that bores or directional well 1 has three aspects:: a. causes and can't effectively draw out methane in order to prevent part of horizontal well section to cave in and to cause the obstruction horizontal wellbore; B. also for the ease of being lowered to dissimilar gas drainage under suction equipment; C. safeguard and change gas drainage under suction equipment after being more convenient for.
In addition, present embodiment can be selected to contain the colliery that gas tolerance is high, pressure is higher in use, and in addition, less being advisable of the content water yield of the colliery roof and floor in this colliery in the time of so can guaranteeing to draw out methane, be avoided a water outlet, held one's breath.
According to an embodiment of the invention, among the above-mentioned steps A, the described straight well of bit drills or directional well with the oil-well rig field make straight well or directional well pass seat earth, then lower production casing well cementation in straight well or directional well.
Branch horizontal well among the above-mentioned steps B comprises a plurality of main horizontal holes 2, is drilled with a plurality of branch well holes 3 at main horizontal hole 2, and adjacent main horizontal hole 2 is interconnected by branch well hole 3.Herein, have three main horizontal holes 2, adjacent main horizontal hole 2 is distributed with respectively two branch well holes 3 in the longitudinal direction, namely has altogether four branch well holes 3 herein; Certainly, quantity and the position of main horizontal hole 2 and branch well hole 3 are not limited to this, and the specification in its visual colliery is set.
Furthermore, described straight well or directional well 1 are communicated with described main horizontal hole 2.Herein, straight well or directional well 1 are communicated with the main horizontal hole 2 that is positioned at the centre position.
Present embodiment is interconnected each main horizontal hole 2 by branch well hole 3, main horizontal hole 2 is interconnected with above-mentioned straight well or directional well, that is to say, branch horizontal well can realize that the coal seam inner fluid connects mutually, can be interconnected original Fracture System and the branch horizontal well that is drilled in the coal seam section and form the different fracture network of structure, link up the cracks in coal seam system, the fast reducing coal-bed gas pressure, extraction also utilizes coal-bed gas gas, for the safe, fast, efficient exploitation of high bottle coal mine lays the foundation.
According to an embodiment of the invention, above-mentioned steps B also comprises the steps:
B1, open drilled straight well 4, be lowered to surface pipe sealing top broken ground.Wherein, the well section of the topmost that this straight well section is branch horizontal well, drilled straight well is to be following directed drilling section and the drilling safety of net horizontal section, this straight well section and described straight well and directional well are not same wells.
B2, continue out directed drilling section 5 from straight well section 4, described directed drilling is communicated with the straight well section; Specifically, at the stable stratum side-drilling windowing of directed drilling section, and deflecting creeps into, until the coal seam landing point of design descends intermediate casing cementing, the sealing angle buildup interval again.
B3, continue out net horizontal section from directed drilling section 5, described net horizontal section is communicated with the directed drilling section, and net horizontal section is communicated with above-mentioned straight well or directional well.In addition, net horizontal section comprises above-mentioned main horizontal hole 2 and branch well hole 3.At point and the position, purpose coal seam of landing, the drill bit that makes up with different size is drilled to a plurality of horizontal branch wells, for all right reaming of the well of coal seam section, to enlarge the bare area in coal seam.
In the present embodiment, borehole size changes greatly, branch well hole quantity is many, the Multilateral Wells orientation is disposed flexibly, casing programme is comparatively complicated, can form the bad hole structure of approximate closed loop, and according to the geological conditions of high gassy, can also on main horizontal hole 2, bore again more branch well hole 3, thereby greatly improve the efficient that draws out methane.
The above only is several embodiments of the present invention, and those skilled in the art can carry out various changes or modification to the embodiment of the invention and do not break away from the spirit and scope of the present invention according to application documents are disclosed.
Claims (5)
1. the high device in Gas process of complex structural well extraction is characterized in that described process comprises the steps:
A, ground drilling straight-hole or directional well;
Branch horizontal well is bored on B, ground, and described branch horizontal well is connected with above-mentioned straight well or directional well;
C, draw out methane at the well head of straight well or directional well.
2. the high device in Gas process of complex structural well extraction according to claim 1, it is characterized in that, among the above-mentioned steps A, with the described straight well of bit drills or directional well, make straight well or directional well pass seat earth, then lower production casing well cementation in straight well or directional well.
3. the high device in Gas process of complex structural well extraction according to claim 1, it is characterized in that, branch horizontal well among the above-mentioned steps B comprises a plurality of main horizontal holes, is drilled with a plurality of branch well holes at main horizontal hole, and adjacent main horizontal hole is interconnected by branch well hole.
4. the high device in Gas process of complex structural well extraction according to claim 3 is characterized in that, described straight well or directional well are communicated with described main horizontal hole.
5. the high device in Gas process of complex structural well extraction according to claim 1 is characterized in that above-mentioned steps B also comprises the steps:
B1, open drilled straight well;
B2, continue out the directed drilling section from the straight well section, described directed drilling is communicated with the straight well section;
B3, open net horizontal section from the directed drilling section, described net horizontal section is communicated with the directed drilling section, and net horizontal section is communicated with above-mentioned straight well or directional well.
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| CN201210330506XA CN102852490A (en) | 2012-09-07 | 2012-09-07 | High gas suction and discharge process method for complex well |
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| CN201210330506XA CN102852490A (en) | 2012-09-07 | 2012-09-07 | High gas suction and discharge process method for complex well |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216234A (en) * | 2013-04-23 | 2013-07-24 | 中国地质科学院勘探技术研究所 | Horizontal branch multi-well-group butted well and construction method thereof |
| CN103485773A (en) * | 2013-09-28 | 2014-01-01 | 山西潞安环保能源开发股份有限公司 | Method for determining multi-branch horizontal well branch parameters |
| CN103742188A (en) * | 2014-01-07 | 2014-04-23 | 中国神华能源股份有限公司 | Coal mine pump drainage gas well and drilling method thereof |
| CN104018820A (en) * | 2014-06-16 | 2014-09-03 | 北京中矿科能煤炭地下气化技术研究中心 | Coal underground gasification process system |
| CN104234740A (en) * | 2014-09-03 | 2014-12-24 | 太原理工大学 | Low-medium pressure air displacement high-pressure coalbed gas system and method thereof |
| CN104481541A (en) * | 2014-11-27 | 2015-04-01 | 中盐勘察设计院有限公司 | One-inclined multi-vertical cascaded well group salt mine mining method |
| CN104963714A (en) * | 2015-04-30 | 2015-10-07 | 山西蓝焰煤层气集团有限责任公司 | Standing air shaft safe coal-uncovering technology of high gassy mine |
| CN108798625A (en) * | 2018-05-31 | 2018-11-13 | 中国神华能源股份有限公司 | Mine and mining construction method |
| CN109162678A (en) * | 2018-11-08 | 2019-01-08 | 中国神华能源股份有限公司 | Coal bed gas pumping method |
| CN109403926A (en) * | 2018-10-31 | 2019-03-01 | 中国神华能源股份有限公司 | Implement the method for the coal bed gas of underground mining multilayer coal in a main entry |
| CN109577941A (en) * | 2018-11-23 | 2019-04-05 | 北京奥瑞安能源技术开发有限公司 | Coal bed gas drilling structure |
| CN110185418A (en) * | 2019-06-20 | 2019-08-30 | 中联煤层气有限责任公司 | A kind of coal bed methane exploring method of coal seam group |
| CN112963124A (en) * | 2021-02-23 | 2021-06-15 | 重庆万普隆能源技术有限公司 | Coal bed gas extraction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040031609A1 (en) * | 1998-11-20 | 2004-02-19 | Cdx Gas, Llc, A Texas Corporation | Method and system for accessing subterranean deposits from the surface |
| CN101985888A (en) * | 2010-10-25 | 2011-03-16 | 中联煤层气国家工程研究中心有限责任公司 | Method for draining gas of highly gassy coal mine |
| CN102116140A (en) * | 2011-01-25 | 2011-07-06 | 煤炭科学研究总院西安研究院 | Construction method for enhancing extraction effect of ground coal bed gas |
| CN202064928U (en) * | 2011-05-30 | 2011-12-07 | 北京奥瑞安能源技术开发有限公司 | Coal-bed gas multi-branch horizontal well system |
-
2012
- 2012-09-07 CN CN201210330506XA patent/CN102852490A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040031609A1 (en) * | 1998-11-20 | 2004-02-19 | Cdx Gas, Llc, A Texas Corporation | Method and system for accessing subterranean deposits from the surface |
| CN101985888A (en) * | 2010-10-25 | 2011-03-16 | 中联煤层气国家工程研究中心有限责任公司 | Method for draining gas of highly gassy coal mine |
| CN102116140A (en) * | 2011-01-25 | 2011-07-06 | 煤炭科学研究总院西安研究院 | Construction method for enhancing extraction effect of ground coal bed gas |
| CN202064928U (en) * | 2011-05-30 | 2011-12-07 | 北京奥瑞安能源技术开发有限公司 | Coal-bed gas multi-branch horizontal well system |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216234B (en) * | 2013-04-23 | 2015-11-18 | 中国地质科学院勘探技术研究所 | A kind of construction method of horizontal branch many well groups butt shaft |
| CN103216234A (en) * | 2013-04-23 | 2013-07-24 | 中国地质科学院勘探技术研究所 | Horizontal branch multi-well-group butted well and construction method thereof |
| CN103485773A (en) * | 2013-09-28 | 2014-01-01 | 山西潞安环保能源开发股份有限公司 | Method for determining multi-branch horizontal well branch parameters |
| CN103742188A (en) * | 2014-01-07 | 2014-04-23 | 中国神华能源股份有限公司 | Coal mine pump drainage gas well and drilling method thereof |
| CN103742188B (en) * | 2014-01-07 | 2016-08-17 | 中国神华能源股份有限公司 | Colliery drawing-off gas well and boring method |
| CN104018820A (en) * | 2014-06-16 | 2014-09-03 | 北京中矿科能煤炭地下气化技术研究中心 | Coal underground gasification process system |
| CN104018820B (en) * | 2014-06-16 | 2017-01-04 | 北京中矿科能煤炭地下气化技术研究中心 | A kind of coal underground gasifying technology system |
| CN104234740B (en) * | 2014-09-03 | 2016-04-13 | 太原理工大学 | A kind of low middle pressure air displacement high pressure coal seam gas train and method thereof |
| CN104234740A (en) * | 2014-09-03 | 2014-12-24 | 太原理工大学 | Low-medium pressure air displacement high-pressure coalbed gas system and method thereof |
| CN104481541A (en) * | 2014-11-27 | 2015-04-01 | 中盐勘察设计院有限公司 | One-inclined multi-vertical cascaded well group salt mine mining method |
| CN104963714A (en) * | 2015-04-30 | 2015-10-07 | 山西蓝焰煤层气集团有限责任公司 | Standing air shaft safe coal-uncovering technology of high gassy mine |
| CN108798625A (en) * | 2018-05-31 | 2018-11-13 | 中国神华能源股份有限公司 | Mine and mining construction method |
| CN108798625B (en) * | 2018-05-31 | 2021-03-26 | 中国神华能源股份有限公司 | Mine and mine construction method |
| CN109403926A (en) * | 2018-10-31 | 2019-03-01 | 中国神华能源股份有限公司 | Implement the method for the coal bed gas of underground mining multilayer coal in a main entry |
| CN109162678A (en) * | 2018-11-08 | 2019-01-08 | 中国神华能源股份有限公司 | Coal bed gas pumping method |
| CN109577941A (en) * | 2018-11-23 | 2019-04-05 | 北京奥瑞安能源技术开发有限公司 | Coal bed gas drilling structure |
| CN109577941B (en) * | 2018-11-23 | 2022-04-29 | 北京奥瑞安能源技术开发有限公司 | Coal bed gas drilling and mining method |
| CN110185418A (en) * | 2019-06-20 | 2019-08-30 | 中联煤层气有限责任公司 | A kind of coal bed methane exploring method of coal seam group |
| CN112963124A (en) * | 2021-02-23 | 2021-06-15 | 重庆万普隆能源技术有限公司 | Coal bed gas extraction method |
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