CN104594904B - Same well site directional-butted well group salt well accident method - Google Patents
Same well site directional-butted well group salt well accident method Download PDFInfo
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- CN104594904B CN104594904B CN201410692101.XA CN201410692101A CN104594904B CN 104594904 B CN104594904 B CN 104594904B CN 201410692101 A CN201410692101 A CN 201410692101A CN 104594904 B CN104594904 B CN 104594904B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/20—Methods of underground mining; Layouts therefor for rock salt or potash salt
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Abstract
The invention discloses a kind of same well site directional-butted well group salt well accident method, concretely comprise the following steps：1) according to the mineral deposit depth of salt mine, a well group axis is designed, subdrilling orients straight well flatly, into salt deposit, dissolving salt deposit builds salt bath；2) extend back certain distance, and ensure in same well site in orientation straight well axis, then bore a bite directional horizontal wellss, into salt deposit, crept into salt deposit along axis, dock with the salt bath for orienting straight well, realize well group connection.The present invention is achieved a butt joint by same well site, boring 2 mouthfuls or many mouthfuls of directional wells in ore bed, forms convection current well group.The present invention reduces drilling well occupation of land to greatest extent, reduces the destruction to ground vegetation, gives full play to the technical advantage of directional well, while meeting the technical requirements of horizontally-butted wells.In addition, the pipe network for being placed close to Single well convection mode of the surface pipeline network of the present invention, the pipe net arrangement than current horizontally-butted wells more simplifies, it is more convenient for adopting halogen production management.
Description
Technical field
The present invention relates to a kind of salt deposit drilling solution mining technology, specifically a kind of same well site directional-butted well group
Salt well accident method.
Background technology
Horizontally-butted wells recovery method is to utilize directed-drilling technique, and Drilling straight well and directional horizontal wellss are in salt deposit
Form lysate circulation canal exploitation salts resources.At present in well mine salt industry dissolution mining by drilling technical field, level docking
Well recovery method has been widely used.
During usually using horizontally-butted wells recovery method, the bottom hole displacement one of the passage length in salt deposit, i.e. horizontal well
As at 150 meters to 500 meters.It is standard of construction passage and straight with Drilling a bite if mining depth is at 500 meters to 2000 meters
Well and a bite horizontal well are made into well group, it is necessary to take two well sites.The problem of there is cultivated area wretched insufficiency in view of China,
And how therefore most of salt mines, reduced to ploughing to greatest extent all in the Important Agricultural planting area in Plain or basin
The occupancy on ground, is the problem that salt mine drilling well exploitation faces.
The content of the invention
It is an object of the invention to provide a kind of same well site directional-butted well group salt well accident method, by same
Well site, bores 2 mouthfuls or many mouthfuls of directional wells, and is achieved a butt joint in ore bed, forms convection current well group, drilling well is reduced to greatest extent
Take up an area, the technical advantage of directional well is given full play to, while meeting the technical requirements of horizontally-butted wells.
To achieve the above object, the present invention provides following technical scheme：
A kind of same well site directional-butted well group salt well accident method, is concretely comprised the following steps：
1) according to the mineral deposit depth of salt mine, a well group axis is designed, subdrilling orients straight well flatly, into salt deposit, dissolving
Salt deposit builds salt bath；
2) extend back certain distance, and ensure in same well site in orientation straight well axis, then bore a bite orientation level
Well, into salt deposit, creeps into salt deposit along axis, is docked with the salt bath for orienting straight well, realizes that well group is connected.
It is used as further scheme of the invention：The step 1) in, using " straight-build and hold wellbore-drop angle-is straight " mode, bore
Orient straight well.
It is used as further scheme of the invention：The step 2) in, using " the straight hold angle of an increasing hole angle one " mode, bore orientation water
Horizontal well.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention passes through in same well site, 2 mouthfuls of brill or many
Mouth directional well, and achieved a butt joint in ore bed, form convection current well group.The present invention reduces drilling well occupation of land to greatest extent, reduces
Destruction to ground vegetation, gives full play to the technical advantage of directional well, while meeting the technical requirements of horizontally-butted wells.And
It is duplicate with current horizontally-butted wells group close to the under ground portion of ore bed.In addition, the cloth of the surface pipeline network of the present invention
The pipe network close to Single well convection mode is put, the pipe net arrangement than current horizontally-butted wells more simplifies, be more convenient for adopting halogen production
Management.
Brief description of the drawings
Fig. 1 is the schematic diagram of same well site directional-butted well group salt well accident method；
In figure：1- orientations straight well, 2- salt deposits, 3- salt baths, 4- directional horizontal wellss.
Embodiment
Below in conjunction with the embodiment of the present invention and accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
Referring to Fig. 1, in the embodiment of the present invention, a kind of same well site directional-butted well group salt well accident method, specific step
Suddenly it is：
1) according to the mineral deposit depth of salt mine, a well group axis is designed, using " straight-build and hold wellbore-drop angle-is straight " mode,
Subdrilling orients straight well 1 flatly, into salt deposit 2, and dissolving salt deposit 2 builds salt bath 3；
2) extend back certain distance, and ensure in same well site in the orientation axis of straight well 1, using " straight-increasing hole angle-is steady
Tiltedly " mode, then a bite directional horizontal wellss 4 are bored, into salt deposit 2, crept into salt deposit 2 along axis, the salt bath 3 with orienting straight well 1
Docking, realizes that well group is connected.
Embodiment 1
Certain salt mine, in paddy fields, 1000 meters or so of mineral deposit buried depth, 60 meters or so of seam thickness originally uses " one
Straight one is oblique " the exploitation of horizontally-butted wells group, each well site, which is taken up an area, reaches 40 × 50 meters, occupies a large amount of rice terraces, adds brill
Well engineering cost.A well group according to the present invention only needs to levy a well site, it is possible to reduce take up an area 50%.
In the embodiment of the present invention, same well site directional-butted well group salt well accident method, specific step is：
1) subdrilling orientation straight well 1, is bored after deep 706 meters or so beginnings deflecting, 150 meters of sweep, about 205 meters of deflecting, i.e.,
911 meters of hole depth, starts drop angle, 150 meters of sweep, and drop angle creeps into 200 meters or so, access hole bottom, and drilling well hole angle is close to 0
Degree, about 1100 meters of hole depth, tripping in diameter 177.8mm casing cementing；Lower brill brill is opened a mine layer, and groove is built in convection circulation in salt deposit 2
3；
2) directional horizontal wellss 4 are bored again, it is consistent with common directional horizontal wellss, bore deep 850 meters or so beginnings deflecting, sweep
150 meters, 157 meters of deflecting, tripping in diameter 177.9mm casing cementing；78.5 meters of tripping in drilling tool deflecting again, into horizontal segment, after
Continuous drilling reaches salt bath 3, realizes that two wells are connected.
The present invention is achieved a butt joint by same well site, boring 2 mouthfuls or many mouthfuls of directional wells in ore bed, formation pair
Flow well group.The present invention reduces drilling well occupation of land to greatest extent, reduces the destruction to ground vegetation, gives full play to directional well
Technical advantage, while meeting the technical requirements of horizontally-butted wells.And close to the under ground portion of ore bed, docked with current level
Well group is duplicate.In addition, the pipe network for being placed close to Single well convection mode of the surface pipeline network of the present invention, than current water
The pipe net arrangement of flat butt shaft more simplifies, and is more convenient for adopting halogen production management.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It may be appreciated other embodiment.
Claims (2)
1. a kind of same well site directional-butted well group salt well accident method, it is characterised in that concretely comprise the following steps：
1) according to the mineral deposit depth of salt mine, a well group axis is designed, first using " straight-build and hold wellbore-drop angle-is straight " mode, is bored
Orientation straight well (1), into salt deposit (2), dissolves salt deposit (2) and builds salt bath (3) flatly；
2) extend back certain distance, and ensure in same well site in orientation straight well (1) axis, then bore a bite directional horizontal wellss
(4), into salt deposit (2), creep into, docked with the salt bath (3) of orientation straight well (1) along axis in salt deposit (2), realize that well group connects
It is logical.
2. same well site directional-butted well group salt well accident method according to claim 1, it is characterised in that the step
2) in, using " straight-build and hold wellbore " mode, directional horizontal wellss (4) are bored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692101.XA CN104594904B (en) | 2014-11-27 | 2014-11-27 | Same well site directional-butted well group salt well accident method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692101.XA CN104594904B (en) | 2014-11-27 | 2014-11-27 | Same well site directional-butted well group salt well accident method |
Publications (2)
| Publication Number | Publication Date |
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| CN104594904A CN104594904A (en) | 2015-05-06 |
| CN104594904B true CN104594904B (en) | 2017-10-31 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106194076B (en) * | 2016-07-19 | 2018-08-14 | 中盐勘察设计院有限公司 | A kind of ultra-deep salt mine horizontally-butted wells replace mud and expanding method |
| CN109026002B (en) * | 2018-09-20 | 2020-04-07 | 中盐勘察设计院有限公司 | Salt mine mining method adopting horizontal branch hole butt-joint well group |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4077481A (en) * | 1976-07-12 | 1978-03-07 | Fmc Corporation | Subterranean mining apparatus |
| CN102108853A (en) * | 2011-01-14 | 2011-06-29 | 沙隆达集团公司 | Salt mine double-well solution mining method |
| CN102364045A (en) * | 2011-10-20 | 2012-02-29 | 中盐金坛盐化有限责任公司 | Equipment special for exploitation of well and mine salt by solution and exploitation method thereof |
| CN103161468B (en) * | 2013-03-28 | 2015-06-17 | 江苏井神盐化股份有限公司 | Well and rock salt solution mining-well recharging filling circulation mining method |
| CN103644673A (en) * | 2013-12-11 | 2014-03-19 | 中盐勘察设计院有限公司 | Exploitation method for geothermal energy in salt mineral deposit |
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Granted publication date: 20171031 Termination date: 20181127 |