CN104989330A - Coalbed gas recovery method - Google Patents
Coalbed gas recovery method Download PDFInfo
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- CN104989330A CN104989330A CN201510483227.0A CN201510483227A CN104989330A CN 104989330 A CN104989330 A CN 104989330A CN 201510483227 A CN201510483227 A CN 201510483227A CN 104989330 A CN104989330 A CN 104989330A
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Abstract
The invention provides a coalbed gas recovery method comprising the following steps: using coal mine parameters to determine vertical well parameters, and setting up the vertical well according to the vertical well parameters; using coal mine parameters and the vertical well parameters to determine horizontal well parameters, and setting up a horizontal well according to the horizontal well parameters. The horizontal well is provided with a plurality of horizontal segments according to the horizontal well parameters, and each horizontal segment is respectively connected with the vertical well. The method can solve the problems in the prior art that pump drainage coalbed gas content is low.
Description
Technical field
The present invention relates to mineral diagram pump drainage technical field, in particular to a kind of coal bed methane exploring method.
Background technology
At present, when carrying out pump drainage to mineral diagram, being set up Vertical Well and horizontal well on ground, and horizontal well is communicated with Vertical Well.Wherein, horizontal well comprises trunk well and Multilateral Wells, and the two ends of Multilateral Wells are communicated with the trunk well of coal seam, horizontal well respectively, and trunk well becomes tree-shaped distribution with Multilateral Wells.
In prior art, the method to set up of horizontal well mainly carries out pump drainage by the trunk well in horizontal well to the coal bed gas in colliery, makes the content of pump drainage coal bed gas in prior art less.
Summary of the invention
Main purpose of the present invention is to provide a kind of coal bed methane exploring method, to solve the less problem of pump drainage coal bed gas content of the prior art.
To achieve these goals, the invention provides a kind of coal bed methane exploring method, comprising:
Step one, according to the parameter of colliery parameter determination Vertical Well, and sets up Vertical Well according to the parameter of Vertical Well;
Step 2, according to the parameter of the parameter determination horizontal well of colliery parameter and Vertical Well, and set up horizontal well according to the parameter of horizontal well, wherein, according to the multiple horizontal segment of the optimum configurations of horizontal well in horizontal well, and each horizontal segment is communicated with Vertical Well respectively.
Further, this step one comprises: move according to the rock of coal mine gallery the well coordinate that Vertical Well is determined at angle.
Further, step 2 comprises: the parameter of Vertical Well comprises well coordinate, and the parameter of horizontal well comprises the coordinate of horizontal well, according to the coordinate of the well coordinate determination horizontal well of Vertical Well.
Further, step 2 also comprises: the parameter of horizontal well comprises structural parameters, according to the structural parameters of colliery parameter determination horizontal well.
Further, horizontal well comprises vertical section, and the structural parameters of horizontal well comprise the setting position of the coordinate of vertical section, the setting direction of horizontal segment and horizontal segment.
Further, the setting position of horizontal segment is arranged in colliery layer, and is 1/3rd places of the thickness of colliery layer to the distance at the top of colliery layer.
Further, step 2 also comprises: in each horizontal segment, arrange screen casing.
Further, in each horizontal segment, arrange screen casing specifically to comprise:
First set up a horizontal segment, and in this horizontal segment, screen casing is installed;
After installing screen casing, shutoff is carried out to the inclination section between this horizontal segment and well head of horizontal well of horizontal well;
After shutoff completes, then set up next horizontal segment, the installation of screen casing and the shutoff of inclination section are carried out to next horizontal segment, until complete the installation of the screen casing of whole horizontal segment and the shutoff of inclination section.
Further, this step 2 also comprises: carry out reaming to the position being positioned at colliery layer in Vertical Well and be communicated with cavity to be formed, each horizontal segment all be communicated with cavity and be communicated with.
Further, the reaming bit being more than or equal to 500mm by diameter carries out reaming to colliery layer.
Apply technical scheme of the present invention, the coal bed methane exploring method adopted by the present invention, first by the parameter of colliery parameter determination Vertical Well, enable staff build Vertical Well by Vertical Well parameter; Again by the parameter of the parameter determination horizontal well of colliery parameter and Vertical Well, and according to the parameter standard of construction well of horizontal well; Wherein, according to the multiple horizontal segment of the optimum configurations of horizontal well, and the multiple horizontal segments in horizontal well are communicated with Vertical Well.By the method, multiple horizontal segment can being communicated with Vertical Well, namely can carrying out extraction by multiple horizontal segment to the coal bed gas in the layer of colliery, as this increased the quantity of extraction structure, and then the content of this well extraction coal bed gas can be increased; Further, the vibrational power flow of this Vertical Well and horizontal well, the coal bed gas that horizontal segment extraction is gone out can directly be discharged by Vertical Well, is easy to staff and manages each horizontal segment.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to coal bed methane exploring method provided by the invention;
Fig. 2 shows the front view according to coal-bed gas exploitation well provided by the invention;
Fig. 3 shows the top view according to coal-bed gas exploitation well provided by the invention.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, Vertical Well; 20, horizontal well; 21, vertical section; 22, inclination section; 23, horizontal segment.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, the invention provides a kind of coal bed methane exploring method, the method comprises:
Step one, according to the parameter of colliery parameter determination Vertical Well 10, and sets up Vertical Well 10 according to the parameter of Vertical Well 10;
Step 2, according to the parameter of the parameter determination horizontal well 20 of colliery parameter and Vertical Well 10, and set up horizontal well 20 according to the parameter of horizontal well 20, wherein, according to the multiple horizontal segment 23 of the optimum configurations of horizontal well 20 in horizontal well 20, and each horizontal segment 23 is communicated with Vertical Well 10 respectively.
According to coal bed methane exploring method provided by the invention, first by the parameter of colliery parameter determination Vertical Well 10, staff is enable to build Vertical Well 10 by Vertical Well 10 parameter; Again by the parameter of the parameter determination horizontal well 20 of colliery parameter and Vertical Well 10, and according to the parameter standard of construction well 20 of horizontal well 20; Wherein, according to the multiple horizontal segment 23 of the optimum configurations of horizontal well 20, and the multiple horizontal segments 23 in horizontal well 20 are communicated with Vertical Well 10, complete the construction of this coal-bed gas exploitation well with this.When this structure carries out pump drainage to the coal bed gas in the layer of colliery, being carry out extraction by the coal bed gas in multiple horizontal segment 23 pairs of colliery layers, as this increased the quantity of extraction structure, and then the content of this well extraction coal bed gas can being increased; Further, this Vertical Well 10 and the vibrational power flow of horizontal well 20, make multiple horizontal segment 23 to be directly communicated with Vertical Well 10, be easy to staff and manage each horizontal segment 23.
Further, this step one comprises: move according to the rock of coal mine gallery the well coordinate that Vertical Well 10 is determined at angle.Wherein, when determining the well coordinate of Vertical Well 10, being move angle by the rock of coal mine gallery to calculate, so Vertical Well 10 can being built in correct position, when digging colliery, pump drainage can not be carried out to coal bed gas and impacting.
Further, step 2 comprises: the parameter of Vertical Well 10 comprises well coordinate, and the parameter of horizontal well 20 comprises the coordinate of horizontal well 20, according to the coordinate of the well coordinate determination horizontal well 20 of Vertical Well 10.
In embodiment provided by the invention, the parameter of Vertical Well 10 comprises the well coordinate of Vertical Well 10, wherein horizontal well 20 comprises vertical section 21, horizontal segment 23 and inclination section 22, and the coordinate of horizontal well 20 is determined according to the well coordinate of Vertical Well 10, and horizontal well and Vertical Well are docked and connected.Particularly, carry out well track parameter measurement by measuring instrument, with the coordinate of calculated level well 20.
Further, step 2 also comprises: the parameter of horizontal well 20 also comprises structural parameters, according to the structural parameters of colliery parameter determination horizontal well 20.
Wherein, horizontal well 20 comprises vertical section 21, the parameter of horizontal well 20 also comprises the structural parameters such as the setting position of the coordinate of vertical section 21, the setting direction of horizontal segment 23 and horizontal segment 23, carry out designing said structure parameter according to colliery parameter, colliery parameter comprises coal seam thickness, permeability, gas permeability etc.Particularly, determine the setting direction of horizontal segment 23 by coal seam strike, horizontal segment 23 and colliery layer are be arranged in parallel, pump drainage coal bed gas can be conducive to and water blocking phenomenon can be eliminated; The spacing between the magnitude setting of horizontal segment 23 and multiple horizontal segment 23 can be determined according to the permeability of colliery layer, gas permeability; The setting position of horizontal segment 23 is arranged in colliery layer, and the distance at the top of required colliery layer is 1/3rd places of the thickness of colliery layer; So be provided with the coal bed gas be beneficial in horizontal segment 23 pairs of colliery layers and carry out extraction, and can prevent when digging horizontal segment 23 by rig brill, drill bit penetrates roof.
Further, step 2 also comprises: in each horizontal segment 23, arrange screen casing.
In embodiment provided by the invention, in each horizontal segment 23, screen casing is set, setting like this can be conducive to horizontal segment 23 pairs of coal bed gas and carry out pump drainage, and each horizontal segment 23 can be reinforced, if there is water blocking or other problem in horizontal segment 23, in horizontal segment 23, add screen casing in advance can so that staff keeps in repair.And in the prior art, because the position of trunk well and Multilateral Wells is interfered mutually, make screen casing can only be arranged in the trunk well of horizontal well 20, Multilateral Wells is so caused easily water blocking to occur, and cannot keep in repair, therefore can only do waste treatment, cause the waste of manpower and resource.And the multiple horizontal segments 23 in the present invention are communicated with Vertical Well 10 respectively, this structure is convenient to screen casing and is arranged in each horizontal segment 23, so solves the problem of water blocking and difficult maintenance, avoids the waste of manpower and resource.
In specific embodiment provided by the invention, screen casing is set in each horizontal segment 23 and specifically comprises:
First in horizontal well 20, set up a horizontal segment 23, and screen casing is installed to this horizontal segment 23; To complete in this horizontal segment 23 screen casing install after, shutoff is carried out to the passage that this horizontal segment 23 is communicated with the well head of horizontal well 20, particularly, shutoff is carried out to the inclination section 22 that this horizontal segment 23 is connected with vertical section 21; After shutoff completes, carry out the foundation of next horizontal segment 23 again, then this horizontal segment 23 is carried out to the installation of screen casing, then carry out the inclination section 22 that this horizontal segment 23 is communicated with vertical section 21 and carry out shutoff, operation is until complete the screen casing installation work of whole horizontal segment 23 and the shutoff work of inclination section 22 successively.So can ensure the normal mounting of each screen casing, and can not have an impact each other.
Further, step 2 also comprises: carry out reaming to the position being positioned at colliery layer in Vertical Well 10 and be communicated with cavity to be formed, each horizontal segment 23 all be communicated with cavity and be communicated with.
Wherein, when digging brill to Vertical Well 10, expanding treatment can be carried out in the position being positioned at colliery layer by large drill bit, so that the horizontal segment 23 of horizontal well 20 is communicated with Vertical Well 10.Particularly, the colliery layer place of reaming bit to Vertical Well 10 being more than or equal to 500mm by diameter carries out expanding treatment, to make having enough large space to be communicated with horizontal segment 23 in Vertical Well 10.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a coal bed methane exploring method, is characterized in that, comprising:
Step one, according to the parameter of colliery parameter determination Vertical Well, and sets up described Vertical Well according to the parameter of described Vertical Well;
Step 2, according to the parameter of the parameter determination horizontal well of described colliery parameter and described Vertical Well, and set up described horizontal well according to the parameter of described horizontal well, wherein, according to the multiple horizontal segment of the optimum configurations of described horizontal well in described horizontal well, and each described horizontal segment is communicated with described Vertical Well respectively.
2. coal bed methane exploring method according to claim 1, is characterized in that, described step one comprises:
The well coordinate that described Vertical Well is determined at angle is moved according to the rock of coal mine gallery.
3. coal bed methane exploring method according to claim 1, is characterized in that, described step 2 comprises:
The parameter of described Vertical Well comprises well coordinate, and the parameter of described horizontal well comprises the coordinate of horizontal well, determines the coordinate of described horizontal well according to the well coordinate of described Vertical Well.
4. coal bed methane exploring method according to claim 3, is characterized in that, described step 2 also comprises:
The parameter of described horizontal well comprises structural parameters, determines the structural parameters of described horizontal well according to described colliery parameter.
5. coal bed methane exploring method according to claim 4, is characterized in that, described horizontal well comprises vertical section, and the structural parameters of described horizontal well comprise the setting position of the coordinate of described vertical section, the setting direction of described horizontal segment and described horizontal segment.
6. coal bed methane exploring method according to any one of claim 1 to 5, is characterized in that, the setting position of described horizontal segment is arranged in colliery layer, and is 1/3rd places of the thickness of described colliery layer to the distance at the top of described colliery layer.
7. coal bed methane exploring method according to claim 1, is characterized in that, described step 2 also comprises:
In each described horizontal segment, screen casing is set.
8. coal bed methane exploring method according to claim 7, is characterized in that, describedly in each described horizontal segment, arranges screen casing specifically comprise:
First set up a horizontal segment, and in this horizontal segment, described screen casing is installed;
After installing described screen casing, shutoff is carried out to the inclination section between this horizontal segment of described horizontal well and the well head of described horizontal well;
After shutoff completes, then set up horizontal segment described in next, the installation of screen casing and the shutoff of inclination section are carried out to the described horizontal segment of the next one, until complete the installation of the described screen casing of whole described horizontal segment and the shutoff of described inclination section.
9. coal bed methane exploring method according to claim 1, is characterized in that, described step 2 also comprises:
Carry out reaming to the position being positioned at colliery layer in described Vertical Well and be communicated with cavity to be formed, each described horizontal segment is all communicated with the described cavity that is communicated with.
10. coal bed methane exploring method according to claim 9, is characterized in that, the reaming bit being more than or equal to 500mm by diameter carries out reaming to described colliery layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510483227.0A CN104989330A (en) | 2015-08-03 | 2015-08-03 | Coalbed gas recovery method |
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| CN201510483227.0A CN104989330A (en) | 2015-08-03 | 2015-08-03 | Coalbed gas recovery method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677746A (en) * | 2017-01-05 | 2017-05-17 | 中国神华能源股份有限公司 | Method for coal bed gas exploitation of full working face through down-hole system |
| CN106930733A (en) * | 2017-05-10 | 2017-07-07 | 中国神华能源股份有限公司 | Coal bed gas group wells extraction system and method for construction |
| CN107152261A (en) * | 2017-05-10 | 2017-09-12 | 中国神华能源股份有限公司 | Coal bed gas extraction system and method for construction |
| CN111980631A (en) * | 2020-08-11 | 2020-11-24 | 太原理工大学 | Method for collaborative gas extraction of goaf and underlying coal seam |
| CN113216908A (en) * | 2021-05-24 | 2021-08-06 | 东北石油大学 | Coal bed gas mining method and horizontal drilling equipment |
Citations (3)
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| RU2259480C2 (en) * | 1998-11-20 | 2005-08-27 | СиДиИкс ГЭЗ ЛЛС | Method for horizontal drainage system forming in gas production, method for drain hole forming and method for gas recovery from coal bed (variants) |
| CN101798918A (en) * | 2010-03-19 | 2010-08-11 | 中国石油大学(北京) | Calculation method used in MWD electromagnetic detection of parallel distance of adjacent wells |
| CN104100244A (en) * | 2013-04-12 | 2014-10-15 | 中国石油化工股份有限公司 | Well spacing method for coal bed gas communication well groups and application of well spacing method in fracturing yield increase |
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2015
- 2015-08-03 CN CN201510483227.0A patent/CN104989330A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2259480C2 (en) * | 1998-11-20 | 2005-08-27 | СиДиИкс ГЭЗ ЛЛС | Method for horizontal drainage system forming in gas production, method for drain hole forming and method for gas recovery from coal bed (variants) |
| CN101798918A (en) * | 2010-03-19 | 2010-08-11 | 中国石油大学(北京) | Calculation method used in MWD electromagnetic detection of parallel distance of adjacent wells |
| CN104100244A (en) * | 2013-04-12 | 2014-10-15 | 中国石油化工股份有限公司 | Well spacing method for coal bed gas communication well groups and application of well spacing method in fracturing yield increase |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677746A (en) * | 2017-01-05 | 2017-05-17 | 中国神华能源股份有限公司 | Method for coal bed gas exploitation of full working face through down-hole system |
| CN106930733A (en) * | 2017-05-10 | 2017-07-07 | 中国神华能源股份有限公司 | Coal bed gas group wells extraction system and method for construction |
| CN107152261A (en) * | 2017-05-10 | 2017-09-12 | 中国神华能源股份有限公司 | Coal bed gas extraction system and method for construction |
| CN111980631A (en) * | 2020-08-11 | 2020-11-24 | 太原理工大学 | Method for collaborative gas extraction of goaf and underlying coal seam |
| CN113216908A (en) * | 2021-05-24 | 2021-08-06 | 东北石油大学 | Coal bed gas mining method and horizontal drilling equipment |
| CN113216908B (en) * | 2021-05-24 | 2022-02-11 | 东北石油大学 | Coal bed gas mining method and horizontal drilling equipment |
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Application publication date: 20151021 |
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