CN101979816A - Coal bed gas horizontal well and drainage-mining straight well combined well drilling construction method - Google Patents
Coal bed gas horizontal well and drainage-mining straight well combined well drilling construction method Download PDFInfo
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- CN101979816A CN101979816A CN 201010286232 CN201010286232A CN101979816A CN 101979816 A CN101979816 A CN 101979816A CN 201010286232 CN201010286232 CN 201010286232 CN 201010286232 A CN201010286232 A CN 201010286232A CN 101979816 A CN101979816 A CN 101979816A
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Abstract
The embodiment of the invention discloses a coal bed gas horizontal well and drainage-mining straight well combined well drilling construction method, which comprises the following steps of: drilling a plurality of drainage-mining straight wells, and forming a hole on a target layer of each drainage-mining straight well; drilling a straight well section and an oblique section of a horizontal well, and driving the sections into a two-opening sleeve string with a graded cement injector; implementing well cementation, and controlling the well cementation cement outside a two-opening sleeve at a set position; drilling the communication section of the horizontal well to communicate with the holes of the drainage-mining straight wells, and then finishing a first horizontal section borehole and a branch; plugging and isolating the horizontal section borehole and the drainage-mining straight wells; forming an oblique point at the position of the straight well section of the horizontal well above the oblique section connected with the plugged horizontal section borehole; and drilling the oblique section by using the oblique point as a starting point to communicate with one of the un-communicated drainage-mining straight wells, and implementing plugging after the horizontal section borehole is drilled. The embodiment of the invention effectively saves the construction time and the construction cost.
Description
Technical field
The present invention relates to the coal-bed gas exploitation field, more particularly, relate to a kind of coal bed gas horizontal well and row and adopt straight well cooperation wellbore construction method.
Background technology
At present, in the exploitation field of coal bed gas, the drilling model that is adopted is generally builds two well sites, comprises that a horizontal well well site and a row adopt the straight well well site; Concrete mode is: after straight well is adopted by the row of being drilled with, be drilled with horizontal well again, the horizontal segment of horizontal well passes row at the coal seam gas-bearing formation and adopts cave in the straight well, and horizontal well and row adopt after straight well formation is communicated with like this, horizontal well can also be drilled with a plurality of branch horizontal well sections in follow-up wellbore construction.After row adopted straight well and the whole completions of horizontal well, coal bed gas was oozed out in the coal seam in horizontal well well section, adopts straight well via row and is arranged the extraction well.
Discover that through the inventor there is following shortcoming at least in this scheme of the prior art:
When in a bigger limit of mining, when a plurality of if desired straight wells are arranged mining coal seam gas, need adopt that straight well is supporting to be drilled with a horizontal well for the row of each increase.Like this, need the construction volume of very big drilling well, thereby, the time cost and the operating cost of construction strengthened.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of coal bed gas horizontal well and row to adopt straight well cooperation wellbore construction method, to save the purpose of construction volume and construction cost.
The embodiment of the invention is achieved in that
A kind of coal bed gas horizontal well and row adopt straight well and cooperate the wellbore construction method, comprise step:
S11, be drilled with a plurality of rows and adopt straight well, adopt the destination layer of straight well each row and make the cave; Be drilled with the straight well section and the inclination section of a horizontal well;
S12, be lowered at described horizontal well and have two of stage cementing device and open bunch tube to described inclination section; Stage cementing device is positioned at the lower end of straight well section or the inclination section that hole deviation is not more than 8 degree, uses stage cementing device to implement well cementation; Described inclination section is used for adopting straight well with first row and is communicated with;
S13, be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with; After finishing drilling pulls out of hole, in the Connectivity Section or two bottoms of driving sleeve pipe that are connected with the Connectivity Section be lowered to packer enforcement packing;
S14, open the free section cutting two of sleeve pipe two and drive sleeve pipe, and cut point is driven sleeve pipe with two of top propose outside the well; In horizontal well straight well section, side tracking point is set apart from the position of described cut point more than 20 meters; The former horizontal well inclination section that the described side tracking point of sealing position is following;
S15, be that starting point is drilled with inclination section and is lowered to and has two of stage cementing device and open bunch tube with described side tracking point, this stage cementing device is positioned at the lower end of straight well section or the inclination sections that hole deviation is not more than 8 degree, uses this stage cementing device to implement well cementation; Described inclination section is used for adopting straight well with next row and is communicated with;
S16, be drilled with next row and adopt Connectivity Section and the branch horizontal well thereof that straight well is communicated with; After finishing drilling pulls out of hole, in this Connectivity Section or two bottoms of driving sleeve pipe that are connected with the Connectivity Section be lowered to packer enforcement packing; Described next row adopts straight well and adopts in the straight well one for the row who is not communicated with;
Repeating step S14 to S16 is communicated with last row and adopts straight well and packing is implemented in this Connectivity Section up to being drilled with last Connectivity Section.
Preferably, in embodiments of the present invention, it is 2 to 6 that described row adopts straight well.
Preferably, in embodiments of the present invention, described first row adopts straight well for to adopt straight well apart from the nearest row of horizontal well straight well section;
Described next row adopts straight well and is: as yet the row who is not communicated with the horizontal segment well to adopt the nearest horizontal well of straight well middle distance horizontal well straight well section straight.
Preferably, in embodiments of the present invention, the position of described cut point is two to open two in the free section of sleeve pipe and open the no box cupling of sleeve pipe and the part of screw thread.
Preferably, in embodiments of the present invention, the position of described cut point is that two of stage cementing device above first is driven sleeve pipe.
The embodiment of the invention also provides another kind of coal bed gas horizontal well and row to adopt straight well cooperation wellbore construction method, comprises step:
S21, be drilled with a plurality of rows and adopt straight well, adopt the destination layer of straight well each row and make the cave; Be drilled with the straight well section and the inclination section of a horizontal well;
S22, be lowered to two at described horizontal well and open sleeve pipe and the well cementation of full well;
S23, be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with;
S24, to adopt straight well with each row who is not communicated with serve as to be communicated with target, opens to window respectively on the sleeve pipe in two of the straight well section of horizontal well successively to be drilled with inclination section, Connectivity Section and branch horizontal well thereof.
Preferably, in embodiments of the present invention, it is 2 to 6 that described row adopts straight well.
Preferably, in embodiments of the present invention, described first row adopts straight well for to adopt straight well apart from the nearest row of horizontal well straight well section.
Preferably, in embodiments of the present invention, described being followed successively by is communicated with earlier the row who is not communicated with as yet and adopts the nearest row of straight well middle distance horizontal well straight well section to adopt well straight.
From above-mentioned technical scheme as can be seen, in embodiments of the present invention, be provided with a plurality of Connectivity Sections that different rows adopt straight well that are communicated with respectively by straight well section at the coal bed gas horizontal well, make at a production zone, when needing a plurality of rows to adopt straight well to come the gas production operation, only need be in a horizontal well well site, the straight well section of the shared horizontal well of a plurality of horizontal segment wells can be communicated with a plurality of rows and adopt straight well.In prior art, the technical scheme that needs each row to adopt the corresponding complete horizontal well of straight well is compared, and the embodiment of the invention is not only saved engineering time and construction cost because having reduced the engineering quantity that is drilled with construction; And, owing to reduce a large amount of places, straight well well site, thus saved effectively because of occupying the cost that ground increases.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 adopts the flow chart of straight well cooperation wellbore construction method for horizontal well described in the embodiment of the invention and row;
Fig. 2 adopts the flow chart of straight well cooperation wellbore construction method for horizontal well described in further embodiment of this invention and row.
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 is obtained under the creative work prerequisite.
In the practice of construction process, in order to solve problem great in constructing amount in the prior art, the embodiment of the invention provides a kind of coal bed gas horizontal well and row to adopt straight well cooperation wellbore construction method, as shown in Figure 1, comprises step:
S11, be drilled with a plurality of rows and adopt straight well, adopt the destination layer of straight well each row and make the cave; Be drilled with the straight well section and the inclination section of a horizontal well;
In a zone, at first to survey well location, determine quantity and position that row adopts straight well, determine the position of horizontal well then.In actual applications, each horizontal well can be adopted straight well with 2 to 6 rows respectively and is communicated with.
According to preposition, begin to arrange the drilling well of adopting straight well, here, each row adopts straight well and can construct one by one, and construction simultaneously also can walk abreast.All rows adopt and implement well logging, well cementation after the straight well drilling well, at destination layer, just carry out the coal seam that coal bed gas row adopts and make the cave, and then, the bottom, cave is following throws husky completion.Each row adopts straight well and waits for connection then.When straight well is adopted by the row of being drilled with, also can be drilled with the straight well section of horizontal well simultaneously.In embodiments of the present invention, being drilled with in proper order of the straight well section of horizontal well and each horizontal well can be selected arbitrarily according to concrete execution conditions, do not influence the final effect in the embodiment of the invention, do not limit at this.
In embodiments of the present invention, selecting earlier, the row of connection close together adopts straight well.This be because, the straight well section of recycling horizontal well, each side tracking point is according to from top to bottom order setting, simultaneously the nearest straight well of dried up horizontal well calculates according to the track of known technology, its side tracking point should be in extreme lower position, do like this be for fear of between a plurality of inclination section wells influence each other or meet in the space.
So, the nearest row of distance horizontal well adopt straight well be drilled with finish after, horizontal well can be drilled with the inclination section that is communicated with usefulness with it.
Need to prove that selecting nearest row to adopt straight well in the embodiment of the invention is optimum embodiment, is not the qualification to the embodiment of the invention.
S12, be lowered at described horizontal well and have two of stage cementing device and open bunch tube to described inclination section; Stage cementing device is positioned at the lower end of straight well section or the inclination section that hole deviation is not more than 8 degree, uses stage cementing device to implement well cementation;
Inclination section be drilled with finish after, then, be lowered to two along described horizontal well and open bunch tube to just being drilled with in the inclination section of finishing; Here, two open and have stage cementing device in the bunch tube, make the lower end that is positioned at the straight well section of stage cementing device or the inclination sections that hole deviation is not more than 8 degree.Then, use stage cementing device to implement well cementation, can be implemented in sleeve pipe under the stage cementing device and the annular space between the open hole borehole wall and be full of sealing cement, and the sleeve pipe of well section and the annular space between the open hole borehole wall do not have cement sealing on the stage cementing device; We claim to be in annular space between the sleeve pipe and the open hole borehole wall, and not have the part of cement sealing be the free section of sleeve pipe.
S13, be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with; After finishing drilling pulls out of hole, open in the sleeve pipe or the Connectivity Section is lowered to packer and implements packing two;
After well cementation is finished, can be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with; With after row adopts straight well and is communicated with and is drilled with branch horizontal well, can go into operation in order to make row after the connection adopt straight well, also need be or open two and to be lowered to packer in the sleeve pipe and to implement packing in the Connectivity Section of just having finished.
S14, open the free section cutting two of sleeve pipe two and drive sleeve pipe, and cut point is driven sleeve pipe with two of top propose outside the well; In horizontal well straight well section, side tracking point is set apart from the position of described cut point more than 20 meters; The sealing horizontal hole is to described side tracking point position;
After first row adopts the straight well connection, adopting straight well for the straight well section of utilizing horizontal well that can continue with other row is communicated with, so drive sleeve pipe with two takes out, thereby can on the borehole wall of horizontal well straight well section, be drilled with the inclination section and the Connectivity Section of new horizontal well, adopt straight well to be communicated with next row.
Since implement more than the stage cementing device of cementing the well part two to drive sleeve pipe generally all be free section, so can be two opening the free section of sleeve pipe and cut two and drive sleeve pipe in the straight well section; Then, cut point being driven sleeve pipe with two of top proposes outside the well; Because two to drive sleeve pipe be metal material, two the latter halfs of driving sleeve pipe produce magnetic disturbance to the drill bit in the follow-up construction in the horizontal well for fear of staying, so apart from the position of described cut point more than 20 meters side tracking point is set in horizontal well straight well section.Then, for convenience of the construction and the support sidetracking drilling tool of sidetracking, can also adopt the inclination section well of the following horizontal well of cement sealing side tracking point.
S15, be that starting point is drilled with inclination section and is lowered to and has two of stage cementing device and open bunch tube with described side tracking point, this stage cementing device is positioned at the lower end of straight well section or the inclination sections that hole deviation is not more than 8 degree, uses this stage cementing device to implement well cementation; Described inclination section is used for adopting straight well with next row and is communicated with;
Determining good and after sealing puts in place at side tracking point, promptly can described side tracking point be that starting point is drilled with and is used for adopting the inclination section that straight well is communicated with next row.Then be lowered to along this inclination section and have two of stage cementing device and open bunch tube, same, this stage cementing device is positioned at the lower end of straight well section or the inclination sections that hole deviation is not more than 8 degree; Then, use stage cementing device to implement well cementation.
In embodiments of the present invention, described next row adopt straight well can for: as yet the row who is not communicated with the horizontal segment well to adopt the nearest horizontal well of straight well middle distance horizontal well straight well section straight.This be because, the straight well section of recycling horizontal well, each kickoff point (KOP) is according to from top to bottom order setting, simultaneously the nearest straight well of dried up horizontal well calculates according to the track of known technology, its kickoff point (KOP) should be in extreme lower position, do like this be for fear of between a plurality of inclination section wells influence each other or meet in the space.
S16, be drilled with next row and adopt Connectivity Section and the branch horizontal well thereof that straight well is communicated with; After finishing drilling pulls out of hole, open in this Connectivity Section or two and to be lowered to packer in the sleeve pipe and to implement packing; Described next row adopts straight well and adopts in the straight well one for the row who is not communicated with;
After just finishing inclination section well cementation and finishing, can be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with; Equally, with after row adopts straight well and is communicated with and is drilled with branch horizontal well, can go into operation, also need open and be lowered to packer in the sleeve pipe and implement packing in the Connectivity Section of just having finished or two in order to make row after the connection adopt straight well.Because in the embodiment of the invention, also need to be drilled with other horizontal segment well, so on the kickoff point (KOP) of having finished, also next kickoff point (KOP) to be set, and with described kickoff point (KOP) is that starting point is drilled with the next horizontal segment well that inclination section is a horizontal well, adopts in the straight well one with the row who is not connected and finishes and be communicated with and implement packing.
Repeating step S14 to S16, to the last Connectivity Section is communicated with last row and adopts straight well and packing is implemented in this Connectivity Section.
Adopt the difference of straight well quantity according to row, also repeat the step S14 to S16 in the above-mentioned steps possibly, such as, when the quantity of adopting straight well as row is 3, after the construction of the 2nd Connectivity Section and branch horizontal well is finished and is implemented packing, need then two opening the free section cutting two of sleeve pipe and drive sleeve pipe in the straight well section, and cut point is driven sleeve pipe with two of top propose outside the well; In horizontal well straight well section, side tracking point is set apart from the position of described cut point more than 20 meters; The side tracking point of this moment is adopted straight well for being used to connect the 3rd row.Then, the following former horizontal well inclination section part well in the described side tracking point of sealing position;
Then, be that starting point is drilled with inclination section and is lowered to and has two of stage cementing device and open bunch tube with described side tracking point, this stage cementing device is positioned at the lower end of straight well section or the inclination sections that hole deviation is not more than 8 degree, uses this stage cementing device to implement well cementation; At this moment, this inclination section is communicated with for being used for adopting straight well with the 3rd row; Because this inclination section is last inclination section that is communicated with straight well, no longer need to be provided with side tracking point later on, so the sleeve pipe that this inclination section is lowered to must cut off not necessarily.Therefore, also can not be lowered to stage cementing device in this sleeve pipe pipe string.
At last, be drilled with the 3rd row and adopt Connectivity Section and the branch horizontal well thereof that straight well is communicated with; After finishing drilling pulls out of hole, be lowered to packer and implement the packing isolation, straight well is gone into operation.
In embodiments of the present invention, the running packer implement packing particular location can for, described packer is in the Connectivity Section or in two bottoms of driving sleeve pipe.
In embodiments of the present invention, the cutting of sleeve pipe for convenience is so will avoid the no box cupling and the threaded portion of sleeve pipe; For this reason, the position of described cut point can be the no box cupling of the sleeve pipe more than the stage cementing device and the part of screw thread; Preferably, can cut first sleeve pipe on the stage cementing device,, select second successively if first undercut cuts failure.
In the embodiment of the invention, adopted the scheme of the straight well section of recycling horizontal well, that is to say, be drilled with among the straight well section of a horizontal well, being drilled with a plurality of Connectivity Sections is communicated with different rows respectively and adopts straight well, thereby saved the engineering quantity of construction effectively, and then saved engineering time and construction cost.
Because the geological environment that has is comparatively stable, be not easy to take place caving in of well, can adopt the mode of in sleeve pipe, windowing to be drilled with inclination section and Connectivity Section, so, the embodiment of the invention also provides another kind of coal bed gas horizontal well and row to adopt straight well cooperation wellbore construction method, as shown in Figure 2, comprise step:
S21, be drilled with a plurality of rows and adopt straight well, adopt the destination layer of straight well each row and make the cave; Be drilled with the straight well section and the inclination section of a horizontal well;
Identical with a last embodiment, in embodiments of the present invention, in a zone, at first to survey well location, determine quantity and position that row adopts straight well, determine the position of horizontal well then.In actual applications, each horizontal well can be adopted straight well with 2 to 6 rows respectively and is communicated with.
According to preposition, begin to arrange the drilling well of adopting straight well, here, each row adopts straight well and can construct one by one, and construction simultaneously also can walk abreast.All rows adopt and implement well logging, well cementation after the straight well drilling well, at destination layer, just carry out the coal seam that coal bed gas row adopts and make the cave, then fill out husky completion below the bottom, cave.Each row adopts straight well and waits for connection then.When straight well is adopted by the row of being drilled with, also can be drilled with the straight well section of horizontal well simultaneously.In embodiments of the present invention, being drilled with in proper order of the straight well section of horizontal well and each horizontal well can be selected arbitrarily according to concrete execution conditions, do not influence the final effect in the embodiment of the invention, do not limit at this.
In embodiments of the present invention, selecting earlier, the row of connection close together adopts straight well.This be because, the straight well section of recycling horizontal well, each kickoff point (KOP) be according to from top to bottom order setting, and the nearest straight well of dried up horizontal well calculates according to the track of known technology simultaneously, its kickoff point (KOP) should be in extreme lower position, with avoid between a plurality of inclination section wells influence each other or meet in the space.
So, the nearest row of distance horizontal well adopt straight well be drilled with finish after, horizontal straight well can be drilled with the inclination section that is communicated with usefulness with it.
Need to prove that selecting nearest row to adopt straight well in the embodiment of the invention is optimum embodiment, is not the qualification to the embodiment of the invention.
S22, be lowered to two at described horizontal well and open sleeve pipe and the well cementation of full well;
Because in follow-up construction, need adopt two in the straight well row opens the sleeve pipe uplifting window and is drilled with well, produce and to rock the construction of can influence windowing if two drive sleeve pipe,, need to implement full well well cementation or guarantee that at least a place well section cementing quality of windowing of expectation is qualified in order to guarantee to window successfully.
S23, be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with;
After well cementation is finished, can be drilled with first row along the inclination section that has just completed and adopt Connectivity Section and the branch horizontal well that straight well is communicated with; After horizontal well was finished, the Connectivity Section was lowered to packer and implements packing, and straight well is gone into operation.
S24, to adopt straight well with each row who is not communicated with serve as to be communicated with target, opens to window respectively on the sleeve pipe in two of the straight well section of horizontal well successively to be drilled with inclination section, Connectivity Section and branch horizontal well thereof.
After the completion of first Connectivity Section and branch horizontal well, can be in the straight well section of horizontal well be communicated with each row and adopt straight well according to from the close-by examples to those far off order.
In the embodiment of the invention, adopted the scheme of the straight well section of recycling horizontal well, that is to say, be drilled with among the straight well section of a horizontal well, being drilled with a plurality of Connectivity Sections is communicated with different rows respectively and adopts straight well, thereby saved the engineering quantity of construction effectively, and then saved engineering time and construction cost.
Each embodiment adopts the mode of going forward one by one to describe in this manual, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (9)
1. coal bed gas horizontal well and row adopt straight well and cooperate the wellbore construction method, it is characterized in that, comprise step:
S11, be drilled with a plurality of rows and adopt straight well, adopt the destination layer of straight well each row and make the cave; Be drilled with the straight well section of a horizontal well and be used for adopting the inclination section that straight well is communicated with first row;
S12, be lowered at described horizontal well and have two of stage cementing device and open bunch tube to described inclination section; Stage cementing device is positioned at the lower end of straight well section or the inclination section that hole deviation is not more than 8 degree, uses stage cementing device to implement well cementation;
S13, be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with; After finishing drilling pulls out of hole, in the Connectivity Section or two bottoms of driving sleeve pipe that are connected with the Connectivity Section be lowered to packer enforcement packing;
S14, open the free section cutting two of sleeve pipe two and drive sleeve pipe, and cut point is driven sleeve pipe with two of top propose outside the well; In horizontal well straight well section, side tracking point is set apart from the position of described cut point more than 20 meters; The horizontal well inclination section well that the described side tracking point of sealing position is following;
S15, be that starting point is drilled with inclination section and is lowered to and has two of stage cementing device and open bunch tube with described side tracking point; This stage cementing device is positioned at the lower end of straight well section or the inclination section that hole deviation is not more than 8 degree, uses this stage cementing device to implement well cementation; Described inclination section is used for adopting straight well with next row and is communicated with;
S16, be drilled with next row and adopt Connectivity Section and the branch horizontal well thereof that straight well is communicated with; After finishing drilling pulls out of hole, in this Connectivity Section or two bottoms of driving sleeve pipe that are connected with the Connectivity Section be lowered to packer enforcement packing; Described next row adopts straight well and adopts in the straight well one for the row who is not communicated with;
Repeating step S14 to S16 is communicated with last row and adopts straight well and packing is implemented in this Connectivity Section up to being drilled with last Connectivity Section.
2. according to the described method of claim 1, it is characterized in that it is 2 to 6 that described row adopts straight well.
3. according to the described method of claim 2, it is characterized in that described first row adopts straight well for to adopt straight well apart from the nearest row of horizontal well straight well section;
Described next row adopts straight well and is: as yet the row who is not communicated with the horizontal segment well to adopt the nearest horizontal well of straight well middle distance horizontal well straight well section straight.
4. according to the described method of claim 3, it is characterized in that the position of described cut point is two to open two in the free section of sleeve pipe and open the no box cupling of sleeve pipe and the part of screw thread.
5. according to the described method of claim 4, it is characterized in that the position of described cut point is that two of stage cementing device above first is driven sleeve pipe.
6. coal bed gas horizontal well and row adopt straight well and cooperate the wellbore construction method, it is characterized in that, comprise step:
S21, be drilled with a plurality of rows and adopt straight well, adopt the destination layer of straight well each row and make the cave; Be drilled with the straight well section and the inclination section of a horizontal well;
S22, be lowered to two at described horizontal well and open sleeve pipe and the well cementation of full well;
S23, be drilled with first row and adopt Connectivity Section and the branch horizontal well that straight well is communicated with;
S24, to adopt straight well with each row who is not communicated with serve as to be communicated with target, opens to window respectively on the sleeve pipe in two of the straight well section of horizontal well successively to be drilled with inclination section, Connectivity Section and branch horizontal well thereof.
7. according to the described method of claim 6, it is characterized in that it is 2 to 6 that described row adopts straight well.
8. according to the described method of claim 7, it is characterized in that described first row adopts straight well for to adopt straight well apart from the nearest row of horizontal well straight well section.
9. according to the described method of claim 6, it is characterized in that described being followed successively by is communicated with earlier the row who is not communicated with as yet and adopts the nearest row of straight well middle distance horizontal well straight well section to adopt well straight.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168575A (en) * | 2011-03-28 | 2011-08-31 | 河南理工大学 | Loose blasting gas extraction technology of horizontal branch well of coal seam floor |
| 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 |
| CN103485713A (en) * | 2012-06-13 | 2014-01-01 | 南风化工集团股份有限公司 | Method for correcting position of target point in communicated well drilling process |
| CN103670271A (en) * | 2013-12-30 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Dual-cycle relay coal bed well drilling method |
| 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 |
| CN104329023A (en) * | 2014-09-23 | 2015-02-04 | 中国石油集团渤海钻探工程有限公司 | Boring method of coal bed gas cluster well |
| CN113482570A (en) * | 2021-07-09 | 2021-10-08 | 中国煤炭地质总局第三水文地质队 | Construction process capable of repeatedly using well cementation casing pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040149432A1 (en) * | 1998-11-20 | 2004-08-05 | Cdx Gas, L.L.C., A Texas Corporation | Method and system for accessing subterranean deposits from the surface |
| CN1651715A (en) * | 2005-03-25 | 2005-08-10 | 北京奥瑞安能源技术开发有限公司 | Method of entering target geologic body and system |
| CN1651714A (en) * | 2005-02-05 | 2005-08-10 | 辽河石油勘探局 | Coal mining underground vertical gasification furnace building and operating method |
-
2010
- 2010-09-17 CN CN201010286232XA patent/CN101979816B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040149432A1 (en) * | 1998-11-20 | 2004-08-05 | Cdx Gas, L.L.C., A Texas Corporation | Method and system for accessing subterranean deposits from the surface |
| CN1651714A (en) * | 2005-02-05 | 2005-08-10 | 辽河石油勘探局 | Coal mining underground vertical gasification furnace building and operating method |
| CN1651715A (en) * | 2005-03-25 | 2005-08-10 | 北京奥瑞安能源技术开发有限公司 | Method of entering target geologic body and system |
Non-Patent Citations (3)
| Title |
|---|
| > 20070531 乔磊等 煤层气多分支水平井钻井工艺研究 112-115 1-9 第28卷, 第3期 * |
| > 20070731 饶孟余等 煤层气多分支水平井钻井关键技术研究 52-55 1-9 第27卷, 第7期 * |
| > 20071130 高德利等 煤层气多分支井身结构设计模型研究 第116页右栏第2段，图6 6-9 第28卷, 第6期 * |
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