CN201794573U - Multi-lateral horizontal well system for coal bed gas - Google Patents
Multi-lateral horizontal well system for coal bed gas Download PDFInfo
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- CN201794573U CN201794573U CN2010205408226U CN201020540822U CN201794573U CN 201794573 U CN201794573 U CN 201794573U CN 2010205408226 U CN2010205408226 U CN 2010205408226U CN 201020540822 U CN201020540822 U CN 201020540822U CN 201794573 U CN201794573 U CN 201794573U
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Abstract
The utility model discloses a multi-lateral horizontal well system for coal bed gas. The system comprises a plurality of multi-lateral horizontal wells, wherein each multi-lateral horizontal well comprises a vertical well section, a deflecting section and a horizontal section which are connected in turn; and every two adjacent horizontal wells are overlapped partially. In the multi-lateral horizontal well system of the utility model, a mode of partially overlapping overlay areas of every two adjacent horizontal wells is adopted when well positions are deployed and branch path structures are designed, so that the situation of a blank area in construction is reduced, the mining amount of underground fluid resources is improved, simultaneously synergetic pressure reduction can be realized between every two adjacent multi-lateral horizontal wells by adopting the mode of partially overlapping; therefore, a single well yield is increased and the development efficiency is improved.
Description
Technical field
The utility model relates to geological resource exploitation field, relates to a kind of coal bed gas multi-branched horizontal well system particularly.
Background technology
The exploitation of existing underground fluid resource in order to enlarge productive area, is adopted multi-branched horizontal well more, and a plurality of multi-branched horizontal wells are formed a multi-branched horizontal well system.At first to be familiar with grasping geological structure information such as the tendency of the topography and geomorphology of the whole district and underground geologic bodies and inclination angle the early stage of underground fluid development of resources, rationally dispose well location according to regional features of terrain and underground geologic bodies structural feature then, determine branch's trend and branch's distribution arrangement of multi-branched horizontal well, final definite well location, the concrete principle of determining well location is as much as possible multi-branched horizontal well rationally to be distributed in the zone that needs exploitation, and the zone does not blank.
As shown in Figure 1, in coal bed gas multi-branched horizontal well engineering, a multi-branched horizontal well 1 and the corresponding straight well 2 that is communicated with are an engineering.Straight well 2 is provided with and is communicated with the cave, and multi-branched horizontal well comprises straight well section 11, inclination section 12, the horizontal segment 13 that links to each other successively, and straight well section 11 is parallel to straight well 2 and extends downwards; Inclination section 12, the oblique connection cave that extends to straight well down from the lower end of straight well section 11; Horizontal segment 13 is connected with the connection cave, extends preset distance from being communicated with the cave along the direction away from inclination section.In the existing multi-branched horizontal well system, keep preset distance to arrange between each multi-branched horizontal well 1, each branch horizontal well 1 in this arrangement is in the wellbore construction process, in case occur caving in or stopping up, cause the part well normally to use, become discarded section 3, then this part shared zone of discarded section sky of becoming exploitation is opened the dead band, more serious, in case occur scrapping because of engineering accident causes engineering, so whole multi-branched horizontal well becomes abandoned well, and the shared zone of this whole multi-branched horizontal well becomes the blank dead band of exploitation.Cause the underground fluid resource reasonably to be developed.
Simultaneously, in the existing multi-branched horizontal well system, keep preset distance to arrange between each multi-branched horizontal well, a little less than the collaborative effect that reduces pressure, cause the production efficiency of underground geologic bodies not high between mutually.
The utility model content
The utility model purpose is to provide a kind of coal bed gas multi-branched horizontal well system, and it is unreasonable to overcome in the prior art exploitation of multi-branched horizontal well system resource, the deficiency that development efficiency is low.
For this reason, the utility model provides a kind of coal bed gas multi-branched horizontal well system, comprise a plurality of multi-branched horizontal wells, each multi-branched horizontal well comprises straight well section, inclination section, the horizontal segment that links to each other successively, and each adjacent multi-branched horizontal well partial stack is each other arranged.
Further, in the above-mentioned coal bed gas multi-branched horizontal well system, in the scope that the horizontal segment that the straight well section of a multi-branched horizontal well and inclination section are arranged on another multi-branched horizontal well is arranged.
Further, in the above-mentioned coal bed gas multi-branched horizontal well system, those straight well sections in a plurality of multi-branched horizontal wells are positioned at the part of horizontal section stack of the adjacent multi-branched horizontal well of horizontal segment the same side and arrange.
Further, in the above-mentioned coal bed gas multi-branched horizontal well system, in the terminal adjacent multi-branched horizontal well of those in a plurality of multi-branched horizontal wells, the terminal stack of horizontal segment part is arranged at least.
Further, above-mentioned stack be set to part staggered, intersect and to arrange or the space overlaps and arranges.
Further, in the above-mentioned coal bed gas multi-branched horizontal well system, the part that stack is arranged in each adjacent multi-branched horizontal well is the 5-15% of each multi-branched horizontal well horizontal segment area.
Further, in the above-mentioned coal bed gas multi-branched horizontal well system, the part that stack is arranged in each adjacent multi-branched horizontal well is 10% of each multi-branched horizontal well horizontal segment area.
Advantage of the present utility model: the utility model coal bed gas multi-branched horizontal well system, when carrying out well location deployment and branch's track configuration design, adopt the partly overlapping mode in the overlay area of each adjacent multi-branched horizontal well, reduce the situation that occurs blank dead band in the construction, improve the yield of underground fluid resource, simultaneously, this partly overlapping mode can make mutually collaborative step-down between the adjacent multi-branched horizontal well, thereby can improve well yield, promote development efficiency.
Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.With reference to figure, the utility model is described in further detail below.
Description of drawings
Accompanying drawing constitute this manual a part, be used for further understanding the utility model, accompanying drawing shows preferred embodiment of the present utility model, and is used for illustrating principle of the present utility model with manual.Among the figure:
Fig. 1 shows the arrangement schematic diagram of coal bed gas multi-branched horizontal well system in the prior art;
Fig. 2 shows the arrangement schematic diagram according to coal bed gas multi-branched horizontal well system among the utility model first embodiment;
Fig. 3 shows the arrangement schematic diagram according to coal bed gas multi-branched horizontal well system among the utility model second embodiment;
Fig. 4 shows the arrangement schematic diagram according to coal bed gas multi-branched horizontal well system among the utility model the 3rd embodiment; And
Fig. 5 shows the side-looking structural representation according to the utility model coal bed gas multi-branched horizontal well system
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
In a kind of exemplary embodiment of the present utility model, a kind of coal bed gas multi-branched horizontal well system, comprise a plurality of multi-branched horizontal wells, each multi-branched horizontal well comprises straight well section 11, inclination section 12, the horizontal segment 13 that links to each other successively, and each adjacent multi-branched horizontal well partial stack is each other arranged.Stack is herein arranged and to be comprised and interlacedly arrange, intersect to arrange or be positioned at space that same vertical plane has certain distance each other and overlap and arrange.
As shown in Figure 2, in first kind of embodiment of the present utility model in this coal bed gas multi-branched horizontal well system, the straight well section 11 of a multi-branched horizontal well 1 and inclination section 12 are arranged in the scope that the horizontal segment 13 of another multi-branched horizontal well arranges.Usually the straight well section 11 of multi-branched horizontal well is applicable to the wellbore construction of implementing multi-branched horizontal well with inclination section 12, in case multi-branched horizontal well comes into operation, this part has just become the blank spot of underground fluid development of resources.The horizontal segment that the straight well section and the inclination section of multi-branched horizontal well is arranged on another multi-branched horizontal well is arranged in the scope, can be effectively the purpose reservoir below the shared space of straight well section and inclination section in the multi-branched horizontal well be exploited, improved the productive area in this zone.
As shown in Figure 3, this coal bed gas multi-branched horizontal well system in second kind of embodiment of the present utility model, those straight well sections 11 in a plurality of multi-branched horizontal wells 1 are positioned at the part of horizontal section 13 stack layouts of the adjacent multi-branched horizontal well 1 of horizontal segment 13 the same sides.The stack here is arranged as the space overlapping or intersects and arranges.In this case, cave in or stop up even occur in the recovery process of a multi-branched horizontal well, also can effectively exploit this zone with another multi-branched horizontal well of this multi-branched horizontal well mutual superposition, for the use of multi-branched horizontal well provides stability by overlapping portion.Guaranteed the production efficiency in the region area.
As shown in Figure 4, this coal bed gas multi-branched horizontal well system in the third embodiment of the present utility model, in the terminal adjacent multi-branched horizontal well 1 of those in a plurality of multi-branched horizontal wells 1, the terminal stack of horizontal segment 13 parts is provided with at least.Here be superposed to intersection, staggered, space overlaps and arranges.This embodiment not only can guarantee the production efficiency in the region area.Simultaneously, a plurality of multi-branched horizontal wells of terminal stack can play the effect of collaborative step-down each other, improve the output of individual well.Simultaneously, when dip direction changes greatly, the cooperation straight well of a multi-branched horizontal well can be arranged on the lower position of physical features, at this moment, this multi-branched horizontal well can be for working in coordination with step-down with its terminal overlapping a plurality of multiple-limb levels, reduce in the multi-branched horizontal well system, the invalid situation of multi-branched horizontal well end portion drilling depth because of physical features has a down dip and caused maximizes and improve the interior production efficiency of region area.
As shown in Figure 5, for overlapping, the space that can understand indication in the utility model better arranges, a kind of side-looking structural representation of multi-branched horizontal well 1 is provided, find out as knowing among the figure, do not have between two multi-branched horizontal wells 1 and intersect, but spatially overlap, in the utility model, claim this to arrange for the space overlaps.
In a kind of preferred implementation of the present utility model, the overlapping of each multi-branched horizontal well that this coal bed gas multi-branched horizontal well system is adjacent partly is the 5-15% of each multi-branched horizontal well horizontal segment area, preferably, be 10% of each multi-branched horizontal well horizontal segment area.Overlapping area is crossed the productive area that conference reduces multi-branched horizontal well, can not play mutual support well and area is too little, mutually the effect of collaborative step-down.
Pointed embodiment can occur in same coal seam gas multi-branched horizontal well simultaneously among each embodiment in the utility model, good each other cooperation, realize reducing the situation that occurs blank dead band in the construction better, improve the yield of underground fluid resource, and make between the adjacent multi-branched horizontal well mutually collaborative step-down, thereby can improve well yield, promote development efficiency.
A kind of coal bed gas multi-branched horizontal well provided by the utility model system is not only applicable to the exploitation of coal bed gas, is applicable to the exploitation that other uses the geology mineral reserve of drainage and step-down method exploitation simultaneously yet.
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. coal bed gas multi-branched horizontal well system, comprise a plurality of multi-branched horizontal wells (1), each described multi-branched horizontal well (1) comprises straight well section (11), inclination section (12), the horizontal segment (13) that links to each other successively, it is characterized in that each adjacent multi-branched horizontal well partial stack is each other arranged.
2. system according to claim 1 is characterized in that, the straight well section (11) of a multi-branched horizontal well (1) and inclination section (12) are arranged in the scope that the horizontal segment (13) of another multi-branched horizontal well arranges.
3. system according to claim 1 is characterized in that, those straight well sections (11) in described a plurality of multi-branched horizontal wells (1) are positioned at part of horizontal section (13) stack of the adjacent described multi-branched horizontal well (1) of horizontal segment the same side and arrange.
4. system according to claim 1 is characterized in that, in the terminal adjacent multi-branched horizontal well (1) of those in described a plurality of multi-branched horizontal wells (1), the terminal stack of horizontal segment (13) part is arranged at least.
5. according to claim 3 or 4 described systems, it is characterized in that, stack be arranged as part staggered, intersect and to arrange or the space overlaps and arranges.
6. according to claim 3 or 4 described systems, it is characterized in that the part that stack is arranged in adjacent each multi-branched horizontal well (1) is the 5-15% of the region area of each multi-branched horizontal well (1) horizontal segment (13) covering.
7. according to each described system of claim 6, it is characterized in that, the part that stack is arranged in adjacent each multi-branched horizontal well (1) be each multi-branched horizontal well (1) horizontal segment (13) covering region area 10%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205408226U CN201794573U (en) | 2010-09-25 | 2010-09-25 | Multi-lateral horizontal well system for coal bed gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205408226U CN201794573U (en) | 2010-09-25 | 2010-09-25 | Multi-lateral horizontal well system for coal bed gas |
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| CN201794573U true CN201794573U (en) | 2011-04-13 |
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| CN2010205408226U Expired - Lifetime CN201794573U (en) | 2010-09-25 | 2010-09-25 | Multi-lateral horizontal well system for coal bed gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2459069C1 (en) * | 2011-09-06 | 2012-08-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Multi-formation oil deposit development 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 |
| CN104265261A (en) * | 2014-08-11 | 2015-01-07 | 中国石油天然气股份有限公司 | Fishbone-shaped branch horizontal well structure |
| CN104763401A (en) * | 2015-04-03 | 2015-07-08 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Shale gas exploitation well spacing method |
-
2010
- 2010-09-25 CN CN2010205408226U patent/CN201794573U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2459069C1 (en) * | 2011-09-06 | 2012-08-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Multi-formation oil deposit development 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 |
| CN104265261A (en) * | 2014-08-11 | 2015-01-07 | 中国石油天然气股份有限公司 | Fishbone-shaped branch horizontal well structure |
| CN104265261B (en) * | 2014-08-11 | 2017-06-13 | 中国石油天然气股份有限公司 | Fish bone well branch horizontal well structure |
| CN104763401A (en) * | 2015-04-03 | 2015-07-08 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Shale gas exploitation well spacing method |
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Granted publication date: 20110413 |
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