CN217233477U - Horizontal communication well mining device - Google Patents
Horizontal communication well mining device Download PDFInfo
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- CN217233477U CN217233477U CN202220940640.0U CN202220940640U CN217233477U CN 217233477 U CN217233477 U CN 217233477U CN 202220940640 U CN202220940640 U CN 202220940640U CN 217233477 U CN217233477 U CN 217233477U
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Abstract
The utility model discloses a well ore deposit salt and sulfate exploitation technical field a horizontal intercommunication well exploitation device, including vertical well technical sleeve pipe and horizontal well technical sleeve pipe, vertical well technical sleeve pipe's lower extreme and horizontal well technical sleeve pipe's lower extreme all stretch into the setting of salt and sulfate deposit layer, and the intraductal nestification of horizontal well technical sleeve has a center tube, and the lower extreme of center tube can be in the salt and sulfate deposit layer between vertical well technical sleeve pipe lower extreme and the horizontal well technical sleeve pipe lower extreme movable, solves and has to go out the problem that the bittern rate is low, the recovery rate is lower, can be used to in the well ore deposit salt and sulfate exploitation.
Description
Technical Field
The utility model relates to a well mine salt and nitrate exploitation technical field, in particular to horizontal intercommunication well mining device.
Background
At present, the salt and nitrate mining of the wells utilizes a single-well convection method or water-soluble mining of well-oriented communicating well groups, under the conditions of ground conditions and permission of underground geological mineral seam structures, more well-oriented communicating mining is adopted, and the recovery rate of the well-oriented communicating well groups is greatly higher than that of single wells. When the directional communicated well group of the well is subjected to water dissolution exploitation, water is alternately injected or brine is discharged from the technical casings at the two ends of the horizontal well and the vertical well, and the water injection time of the end of the horizontal well is longer than that of the end of the vertical well. Technical sleeves for sealing off formation water are arranged in the vertical well and the horizontal well. The device and the mining mode have the following problems:
1) only a certain range of solid ore layers around the technical casing can be dissolved, the brine yield is low, and the recovery rate is low;
2) the casing pipe is injected with water for a long time by the horizontal well end technology, a cement ring for solidifying the casing pipe falls off after a solid ore layer is corroded, the casing pipe is unsupported, the water outlet direction of the casing pipe cannot be controlled, salt ore corrosion cannot progress, the phenomena of premature exposure, serious collapse and the like of a salt ore layer top plate are easily formed, and the quality of brine is reduced or a dissolving cavity is communicated with a stratum fracture.
SUMMERY OF THE UTILITY MODEL
To the not enough of existence among the prior art, the utility model provides a horizontal intercommunication well mining device solves current low, the lower problem of recovery rate of bittern rate.
The purpose of the utility model is realized like this: the utility model provides a horizontal intercommunication well mining devices, includes vertical well technical casing and horizontal well technical casing, vertical well technical casing's lower extreme and horizontal well technical casing's lower extreme all stretch into the saltpeter deposit setting, the intraductal nested center tube that has of horizontal well technical casing, the lower extreme of center tube can move about between vertical well technical casing lower extreme and horizontal well technical casing lower extreme in the saltpeter deposit.
The utility model discloses a theory of operation does:
the lower end of a central pipe is extended into a position close to the lower end of a vertical well technical casing in a salt and nitrate ore bed, water is injected into the central pipe, and the central pipe is retracted in the mining process according to the total corrosion amount and the quality change of brine to form a step-withdrawing mining mode until all the central pipes are withdrawn to the position of the original technical casing mouth; thereby solving the problems of low brine yield and low recovery rate caused by the fixed position of the lower end of the casing pipe in the horizontal well technology.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses utilize the center tube, change horizontal well technology casing mouth initial water position, through changing the erosion seam position, enlarge the erosion scope, compare with the water-soluble exploitation scheme of traditional intercommunication well group, can increase the water-soluble exploitation volume, improve the recovery rate that well group used the resource by a wide margin, it is long when reducing horizontal well technology casing water injection, effectively protected the technical sleeve pipe, and fine control the play water direction, make the erosion of dissolving chamber be orderly development situation.
As an improvement of the utility model, the cover is equipped with a plurality of spring centralizer between center tube and the horizontal well technique sleeve pipe. The centralizer is used for elastic support and shock absorption, rigid collision between the central pipe and the technical casing of the horizontal well is avoided, and geological disasters such as underground water pollution and surface bittern emission caused by casing crushing and corrosion perforation are avoided.
As the improvement of the utility model, the upper peripheral cover of the straight well technical sleeve is provided with a straight well surface sleeve. The surface casing is mainly used for sealing a shallow thick water layer.
As the improvement of the utility model, the sheathed tube upper portion periphery cover of horizontal well technique is equipped with horizontal well top layer sleeve pipe. The surface casing is mainly used for sealing a shallow thick water layer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the present invention in a use state.
Fig. 3 is a schematic view of the second usage state of the present invention.
Fig. 4 is a schematic view showing the usage state of the present invention.
The device comprises a vertical well technical casing, a horizontal well technical casing, a vertical well surface casing, a horizontal well surface casing, a central pipe and a spring centralizer, wherein the vertical well technical casing is 1, the horizontal well technical casing is 2, the vertical well surface casing is 3, the horizontal well surface casing is 4, the central pipe is 5, and the spring centralizer is 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1 a horizontal intercommunication well mining device, including vertical well technical casing 1 and horizontal well technical casing 2, the upper portion periphery cover of vertical well technical casing 1 is equipped with vertical well surface casing 3, the upper portion periphery cover of horizontal well technical casing 2 is equipped with horizontal well surface casing 4, the salt nitrate ore bed setting is all stretched into to the lower extreme of vertical well technical casing 1 and the lower extreme of horizontal well technical casing 2, the nested center tube 5 that has in horizontal well technical casing 2, the lower extreme of center tube 5 can be in the salt nitrate ore bed between vertical well technical casing 1 lower extreme and the horizontal well technical casing 2 lower extreme activity, the cover is equipped with a plurality of spring centralizer 6 between center tube 5 and horizontal well technical casing 2.
As shown in fig. 2-4, the utility model comprises the following steps during the operation:
and step 1), after the vertical well and the horizontal well are horizontally communicated according to the normal drilling well, the central pipe 5 is extended to the middle vertical well position C of the horizontal distance AB of the two wells.
Step 2) injecting water into a central pipe 5 in the horizontal well, discharging brine from the vertical well, and carrying out a conventional well and mineral salt production process;
step 3) after a period of mining, extracting the central pipe 5 to a position D or performing central pipe 5 cutting operation to the position D through total amount calculation and quality analysis of the mined brine;
step 4) repeating the step 2), calculating the total amount of the produced brine and analyzing the quality after continuous production for a period of time, and extracting the pipe 5 to the position A;
step 5), injecting water into the horizontal well technical casing 2, discharging brine from the vertical well, and carrying out a conventional well and mineral salt production process;
and 6) injecting water into the vertical well technical casing 1, discharging brine from the horizontal well technical casing 2, and pouring the two wells for production according to production requirements.
Examples
Will the utility model discloses be applied to in the concrete example, the mineral seam is slim individual layer glauber's salt ore deposit, mineral seam taste 84%, 18 meters of thickness, about 1900 meters of mineral seam buried depth, the stratum inclination is less than 5 degrees, straight well top casing 3, horizontal well top casing 4 lower floor are about 400 meters in height above sea level, it is in the light layer section inner water layer of packing shallow layer 350 and 390 meters to anticipate, 4-5 meters in the deep distance glauber's salt ore deposit bottom boundary under the straight well end sleeve pipe, 1-2 meters in the deep distance glauber's salt deposit bottom boundary under the horizontal well technology sleeve pipe 2, well drilling orbit pastes 1 meter and creeps into to B some two wells intercommunication behind the three-throw after the opening glauber's salt deposit bottom. The distance between two well casings (AB two-point distance) is about 300 meters; after the two wells are communicated, one central tube 5 is arranged in the horizontal well technical casing 2, and the outlet is arranged to the point C and is about 100 meters away from the point B.
In the first production stage, water is injected from a central pipe 5, water is discharged from a casing 1 in the vertical well technology, and the water injection flow is controlled to be 10-15m 3/h at the initial stage (0-6 months) of the tank building period; meanwhile, the daily oil injection oil pad protection work for mirabilite exploitation is well done, the natural dissolving-up speed of the cavity is controlled to expand the side dissolving range, water injection is kept for the central pipe 5 of the horizontal well, the flow rate of the later-stage water injection is controlled to be 20-30m 3/h, the concentration of sodium sulfate in the sodium nitrate water is kept above 350g/l until mirabilite is produced by about 20 ten thousand tons, and the production time is about 3-4 years; this is the first stage of production.
And in the second production stage, pipe cutting operation is carried out on the central pipe 5, the pipe cutting position is about two sets of pipes, the distance from the pipe cutting position to the central position is D, the distance from the pipe cutting position to the point A is about 100 m, after the operation is finished, water is injected into the central pipe 5, and water is discharged from the vertical well technical casing 1. The second tank building period is started, and the production time, the water injection flow control and the oil pad protection are the same as the first production stage. And when the mirabilite produced in the second stage reaches 20 ten thousand tons or the sodium sulfate concentration in the nitric acid water is lower than 350g/l, finishing the exploitation in the second stage.
And in the third stage, the central pipe 5 is subjected to pipe lifting operation, water is injected from the horizontal well technical casing 2, and water is discharged from the vertical well technical casing 1. And starting the production in the third tank building period. The production pattern is consistent with the traditional well-to-well production pattern. In the production period, two wells can be alternately injected with water for exploitation until the quality of the saltwater is lower than the production requirement, and the wells are shut down. The central pipe 5 is additionally arranged for step-withdrawing type water injection exploitation, so that the used reserves between two wells in the original traditional exploitation mode are effectively exploited, the exploitation amount of mirabilite is expected to be increased by about 40 ten thousand tons, and the recovery rate of the traditional mirabilite well group is improved by 40-50%.
The above description of the embodiments is only intended to help understand the method of the present invention and its core ideas. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (4)
1. The utility model provides a horizontal intercommunication well mining device, its characterized in that, includes vertical well technical casing (1) and horizontal well technical casing (2), the lower extreme of vertical well technical casing (1) and the lower extreme of horizontal well technical casing (2) all stretch into the saltpeter mineral bed setting, nested central tube (5) in horizontal well technical casing (2), the lower extreme of central tube (5) can move about between saltpeter mineral bed internal vertical well technical casing (1) lower extreme and horizontal well technical casing (2) lower extreme.
2. A production device according to claim 1, characterized in that a plurality of spring centralizers (6) are sleeved between the central pipe (5) and the horizontal well technical casing (2).
3. A production device according to claim 1 or 2, characterized in that the upper part of the vertical well technical casing (1) is sleeved with a vertical well surface casing (3).
4. A mining device according to claim 1 or 2, characterized in that the upper peripheral casing of the horizontal well technical casing (2) is provided with a horizontal well surface casing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220940640.0U CN217233477U (en) | 2022-04-22 | 2022-04-22 | Horizontal communication well mining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220940640.0U CN217233477U (en) | 2022-04-22 | 2022-04-22 | Horizontal communication well mining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217233477U true CN217233477U (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220940640.0U Active CN217233477U (en) | 2022-04-22 | 2022-04-22 | Horizontal communication well mining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217233477U (en) |
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2022
- 2022-04-22 CN CN202220940640.0U patent/CN217233477U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20230523 Address after: 225009 No.1, Wenhui West Road, Yangzhou Economic Development Zone, Jiangsu Province Patentee after: SINOPEC Group Patentee after: SINOPEC GROUP JIANGSU PETROLEUM EXPLORATION BUREAU Co.,Ltd. Patentee after: JIANGSU XINYUAN MINING Co.,Ltd. Address before: 3rd Floor, Area A, Office Building, Zijing Hotel, Oilfield, No. 197, Weiyang Road, Hanjiang District, Yangzhou City, Jiangsu Province, 225000 Patentee before: JIANGSU XINYUAN MINING Co.,Ltd. |