CN114922564B - Withdrawing type well washing process for horizontal well in salt lake region - Google Patents
Withdrawing type well washing process for horizontal well in salt lake region Download PDFInfo
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- CN114922564B CN114922564B CN202210565521.6A CN202210565521A CN114922564B CN 114922564 B CN114922564 B CN 114922564B CN 202210565521 A CN202210565521 A CN 202210565521A CN 114922564 B CN114922564 B CN 114922564B
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- well
- drill bit
- horizontal well
- halogen
- horizontal
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- 238000005406 washing Methods 0.000 title claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 40
- 150000002367 halogens Chemical class 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 13
- 238000011010 flushing procedure Methods 0.000 claims abstract description 9
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 81
- 239000012267 brine Substances 0.000 claims description 70
- 239000002002 slurry Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005065 mining Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Earth Drilling (AREA)
Abstract
The application relates to an exit type well flushing process for a horizontal well in a salt lake region, which comprises the following steps: s1, drilling of a horizontal well: drilling in a halogen storage layer at the lower part of the salt lake until a horizontal well is formed, and enabling the tail end of the horizontal well to be communicated with an existing vertical halogen extraction well; s2, adjusting the position of a submerged halogen pump in a halogen extraction well; s3, washing the horizontal well. This application has the effect that improves single well and adopts steamed volume.
Description
Technical Field
The application relates to the field of brine extraction technology, in particular to an exiting type well washing process for a horizontal well in a salt lake area.
Background
China is the largest world consumer of potash fertilizers, and potassium salt is one of seven major scarce mineral products in China and becomes an important strategic resource for guaranteeing national food safety. The geological reserve of KCl in China is about 9.9 hundred million tons, liquid brine mine is mainly used, and the production of potassium salt is mainly used for producing potassium fertilizer by collecting underground brine of salt lake.
At present, one of the forms of salt lake brine mining engineering in China is well mining, the well mining technology of brine mainly aims at deep brine or a deep brine layer below a salt lake surface salt rock layer, and the method is widely applied to the aspects of extracting bromine in coastal areas and mining underground deep brine in developed areas of salt manufacturing industry due to simple, convenient and quick construction. But the problem of lower single-well brine production exists at present.
Disclosure of Invention
In order to improve the brine recovery amount of a single well, the application provides an exit type well washing process of a horizontal well in a salt lake area.
The application provides a salt lake area horizontal well withdrawing type well flushing process which adopts the following technical scheme:
an exit type well washing process for a horizontal well in a salt lake region comprises the following steps:
s1, drilling a horizontal well: drilling in a halogen storage layer at the lower part of the salt lake until a horizontal well is formed, and enabling the tail end of the horizontal well to be communicated with an existing vertical halogen extraction well;
s2, adjusting the position of a submerged halogen pump in a halogen extraction well;
s3, washing the horizontal well.
By adopting the technical scheme, the horizontal well is formed by drilling the brine storage layer at the lower part of the salt lake, and the formed horizontal well is communicated with the existing brine collecting well, so that the newly formed horizontal well increases the brine collecting area and is convenient for improving the brine collecting amount of a single well.
Preferably, the drilling of the horizontal well is: the horizontal directional drilling machine is used for drilling a horizontal well and is connected with a slurry pump, circulating slurry is injected into a drill bit through the slurry pump in the drilling process of the drill bit of the horizontal directional drilling machine, a plurality of slurry outlet holes are formed in the drill bit, and the slurry is sprayed out of the slurry outlet holes of the drill bit.
By adopting the technical scheme, in the process of drilling a horizontal well by using the horizontal directional drilling machine, a large amount of circulating mud is pumped into the drill bit through the mud pump, and in the process of screwing the drill bit, the circulating mud is sprayed out from the mud outlet of the drill bit, so that a certain lubricating effect is achieved on the drill bit.
Preferably, the adjustment of the position of the submerged halogen pump in the brine production well comprises the following steps: and moving the position of the submerged halogen pump in the halogen extraction well to enable the water inlet of the submerged halogen pump to be flush with or lower than the position where the halogen extraction well is communicated with the horizontal well, and modulating the halogen output of the submerged halogen pump to the maximum by using a frequency conversion cabinet.
By adopting the technical scheme, in the process of drilling the horizontal well, the circulating slurry sprayed out of the drill bit can possibly enter the brine extraction well, so that the position of the water inlet of the brine extraction pump is flush with or lower than the position where the brine extraction well is communicated with the horizontal well, and the circulating slurry can be pumped out better.
Preferably, the well washing of the horizontal well comprises the following steps:
s3-1, injecting clean saturated brine into the horizontal well;
s3-2, withdrawing the drill rod;
and S3-3, operating the submerged halogen pump.
By adopting the technical scheme, in the process of drilling the horizontal well, the mud sprayed by the drill bit can be retained in the horizontal well and the brine extracting well, and at the moment, clean and saturated brine is injected into the horizontal well, and the mud is pumped out through the brine submerging pump, so that the horizontal well and the brine extracting well are conveniently washed, the gap of a brine storage layer is dredged, and better brine extraction is facilitated.
Preferably, the injection of clean saturated brine into the horizontal well: when the drilling construction of the horizontal well is finished, the whole set of drilling tools including the drill bit and the plurality of drill rods is retained in the horizontal well, clean saturated brine is injected into the drill bit by using a slurry pump, and the drill bit is rotated and retracted at the same time.
By adopting the technical scheme, clean saturated brine is pumped into the drill bit through the mud pump, and then the brine is sprayed out from the mud outlet hole of the drill bit, so that the mud in the horizontal well and the brine extraction well can be cleaned, and the brine can be injected without installing other power equipment; in addition, the abundant local brine is used as the flushing liquid according to local conditions.
Preferably, the retraction of the drill rod is: the horizontal directional drilling machine comprises a plurality of drill rods which are connected pairwise, in the process of withdrawing the drill bit, the drill bit is withdrawn by one drill rod at a time, then the drill bit is controlled to slowly advance by the distance of one drill rod, the drill bit is always kept in a brine spraying state, and the process is repeated repeatedly; then retracting the length of one drill bit again, and retracting and pushing the drill bit repeatedly; and repeating the operation until the drill bit and all drill rods are separated from the horizontal well.
By adopting the technical scheme, the well wall of the horizontal well can be well cleaned by spraying water through reciprocating retraction and propulsion of the drill rod and the drill bit.
Preferably, after the length of one drill rod is withdrawn each time, the drill bit is controlled to stop rotating and spraying water, and the drill rod closest to the horizontal directional drilling machine body is removed.
By adopting the technical scheme, after the drill rod is withdrawn, the useless drill rod is disassembled, so that the space is saved.
Preferably, the operation of the submersible halogen pump is: and after the well washing work on the same day is finished, continuing to keep the operation of the maximum power of the submerged halogen pump until the brine pumped from the brine extraction well is clear from turbidity, and then finishing pumping water.
By adopting the technical scheme, the brine mixed with the slurry in the brine extracting well is pumped out until the pumped brine is kept clean all the time, so that the horizontal well and the brine extracting well are cleaned.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the area for producing brine is increased, and the brine production amount of a single well is convenient to improve;
2. need not to accomplish the injection of brine through installing other power equipment, and according to local conditions, utilized local abundant brine as the flush fluid, can be better wash horizontal well and adopt the brine well.
Drawings
FIG. 1 is a schematic diagram of an overall flow of a well-flushing process embodied in an embodiment of the present application.
FIG. 2 is a schematic flow diagram of a well-flushing of a horizontal well embodied in an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1-2.
The embodiment of the application discloses an exit type well washing process for a horizontal well in a salt lake area. Referring to fig. 1 and 2, the withdrawing type well flushing process of the horizontal well in the salt lake area comprises drilling of the horizontal well, adjustment of the position of a submerged halogen pump in a halogen production well and well flushing of the horizontal well.
S1, drilling of a horizontal well: and drilling in a lower halogen storage layer of the salt lake by using a horizontal directional drilling machine so as to form a horizontal well. The tail end of the horizontal well formed by drilling is communicated with the existing vertical brine extraction well. The horizontal directional drilling machine is usually connected with a slurry pump, a large amount of circulating slurry is injected into a drill bit through the slurry pump in the drilling process of the drill bit of the horizontal directional drilling machine, and the drill bit is lubricated due to the fact that a plurality of radial slurry outlet holes are formed in the drill bit and a large amount of slurry is sprayed out of the slurry outlet holes of the drill bit.
However, the brine storage layer is of a special porous structure, so that a large amount of circulating slurry injected in the drilling process of the horizontal directional drilling machine is leaked, the drilling speed is influenced, and the drilling bit is greatly damaged and even stuck. In order to reduce the occurrence of large losses of the circulating mud, the consistency of the circulating mud needs to be increased to improve the retaining capacity of the circulating mud. So reduced the condition emergence that the sticking of the drill embraced the brill promptly, reduced the moment of torsion, guaranteed that the drill bit is comparatively smooth creeps into.
S2, adjusting the position of a submerged halogen pump in a halogen extraction well: and adjusting the position of the brine submersible pump in the brine recovery well to enable the water inlet of the brine submersible pump to be positioned at the communication position of the brine recovery well and the horizontal well, or to enable the water inlet of the brine submersible pump to be slightly lower than the communication position of the brine recovery well and the horizontal well. The frequency conversion cabinet is used for modulating the brine discharge amount of the brine submersible pump to the maximum, and the purpose is to pump out the slurry flowing into the brine recovery well from the horizontal well to the maximum.
In the drilling process of the horizontal well, circulating mud sprayed out of the drill bit can be retained in the horizontal well and the brine extracting well, so that the mud can block the pores of the brine storage layer and block underground water circulation. In order to solve the above problems, a well washing of the horizontal well is required.
S3, washing the horizontal well: the method comprises the steps of injecting clean saturated brine into a horizontal well, withdrawing a drill rod, operating a submerged brine pump and circularly washing the well. And in the well washing process of the horizontal well, the submerged halogen pump is always in a running state.
S3-1, injecting clean saturated brine into the horizontal well: when the drilling construction of the horizontal well is finished, the whole set of drilling tools including the drill bit and the plurality of drill rods is retained in the horizontal well, wherein the position of the drill bit is located at the connecting position of the tail end of the horizontal well and the brine extraction well. And at the moment, clean saturated brine is injected into the drill bit by using a slurry pump, the drilling machine is started, the drill bit is rotated at a high speed and is slowly withdrawn, and the injected clean brine is radially injected from a mud outlet hole of the drill bit, so that the wall of the horizontal well is flushed.
S3-2, withdrawing the drill rod: the horizontal directional drilling machine comprises a plurality of drill rods which are connected pairwise, and the drill rods are withdrawn by one at a time in the process of withdrawing the drill bits. And then the drill bit is controlled to slowly advance for a distance of one drill rod, the drill bit is always kept in a brine spraying state, and the drill bit is withdrawn and pushed in a reciprocating mode for three times respectively, and the time is 30 minutes.
And after the third time of withdrawal, controlling the drill bit to stop rotating and spraying water, and removing the drill rod closest to the horizontal directional drilling machine body. And then the length of one drill bit is withdrawn again, and the drill bit is withdrawn and pushed back and forth three times respectively. And repeating the operation until the drill bit and all drill rods are separated from the horizontal well.
S3-3, continuing to operate the submerged halogen pump: and after the well washing work on the same day is finished, continuously keeping the maximum power of the submerged halogen pump to operate for a period of time until the brine pumped from the brine extraction well is clear from turbidity, and then finishing pumping water.
S3-4, circularly washing the well: and (3) continuing the well washing work of one horizontal well for several days, circularly reciprocating the whole well washing process until the whole horizontal well is cleaned, keeping the brine pumped finally clean all the time, and finishing the well washing work.
After the well washing process is finished, a large amount of fine sand is found in the brine conveying channel for draining water, and the fine sand is not added when slurry is prepared, so that the fine sand pumped out along with brine originally exists in the brine storage layer and is filled in the pores of the brine storage layer, and after the fine sand is drained, the porosity of the brine storage layer is increased, underground water is enabled to circulate more smoothly, and the permeation speed of the brine storage layer is increased.
After the well washing is finished, the water yield of the brine extraction well is obviously increased through a water pumping test, which shows that the well washing process has a good cleaning effect on slurry generated in the construction process of the horizontal well and dredges the brine storage layer to a certain extent.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. An exiting type well washing process for a horizontal well in a salt lake area is characterized by comprising the following steps:
s1, drilling of a horizontal well: drilling in a halogen storage layer at the lower part of the salt lake by using a horizontal directional drilling machine until a horizontal well is formed, so that the tail end of the horizontal well is communicated with the existing vertical halogen extraction well, and the horizontal directional drilling machine is connected with a mud pump;
s2, adjusting the position of a submerged halogen pump in a halogen extraction well;
s3, washing the horizontal well;
the well washing of the horizontal well comprises the following steps:
s3-1, injecting clean saturated brine into the horizontal well: when the drilling construction of the horizontal well is finished, the whole set of drilling tools including the drill bit and a plurality of drill rods is retained in the horizontal well, clean saturated brine is injected into the drill bit by using a slurry pump, and the drill bit is rotated and retracted at the same time;
s3-2, withdrawing the drill rod: the horizontal directional drilling machine comprises a plurality of drill rods which are connected pairwise, in the process of withdrawing the drill bit, the drill bit is withdrawn by one drill rod at a time, then the distance of the drill bit advancing by one drill rod is controlled, the drill bit always keeps a state of spraying clean saturated brine, and the process is repeated repeatedly; then retracting the length of one drill bit again, and retracting and pushing the drill bit repeatedly; repeating the operation until the drill bit and all the drill rods are separated from the horizontal well;
and S3-3, continuing to operate the submerged halogen pump.
2. The withdrawing type well washing process for the horizontal well in the salt lake region according to claim 1, characterized in that the horizontal well is drilled by: in the drilling process of a drill bit of the horizontal directional drilling machine, circulating mud is injected into the drill bit through a mud pump, a plurality of mud outlet holes are formed in the drill bit, and the mud is sprayed out of the mud outlet holes of the drill bit.
3. The withdrawing type well flushing process for the horizontal well in the salt lake region according to claim 1, wherein the adjustment of the position of a submerged halogen pump in the brine recovery well is as follows: and moving the position of the submerged halogen pump in the halogen extracting well to enable the water inlet of the submerged halogen pump to be flush with or lower than the position where the halogen extracting well and the horizontal well are communicated, and modulating the halogen output of the submerged halogen pump to the maximum by using a frequency conversion cabinet.
4. The withdrawing type well washing process for the horizontal well in the salt lake area is characterized in that after the length of one drill rod is withdrawn each time, the drill bit is controlled to stop rotating and spraying water, and the drill rod closest to the horizontal directional drilling machine body is removed.
5. The withdrawing type well flushing process for the horizontal well in the salt lake region according to claim 1, wherein the operation of the submerged halogen pump is continued: and after the well washing work on the same day is finished, continuing to keep the operation of the maximum power of the submerged halogen pump until the brine pumped from the brine extraction well is clear from turbidity, and then finishing pumping water.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100936460B1 (en) * | 2009-07-23 | 2010-01-18 | 주식회사 에스제이지반기술 | A well washing device |
CN104196498A (en) * | 2014-08-21 | 2014-12-10 | 青海盐湖工业股份有限公司 | Brine drilling and exploiting system and method for dynamic cleaning and salt deposition resisting in closed cycle mode |
CN111101905A (en) * | 2019-10-30 | 2020-05-05 | 青海中煤地质工程有限责任公司 | Brine well mining and well completion process for pore type brine seam of salt lake mining area |
CN112127831A (en) * | 2020-08-24 | 2020-12-25 | 山成栋 | Construction method for brine recovery well of salt lake |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105863578A (en) * | 2016-05-11 | 2016-08-17 | 四川行之智汇知识产权运营有限公司 | Horizontal well completion string capable of achieving subsection exploiting |
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- 2022-05-23 CN CN202210565521.6A patent/CN114922564B/en active Active
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KR100936460B1 (en) * | 2009-07-23 | 2010-01-18 | 주식회사 에스제이지반기술 | A well washing device |
CN104196498A (en) * | 2014-08-21 | 2014-12-10 | 青海盐湖工业股份有限公司 | Brine drilling and exploiting system and method for dynamic cleaning and salt deposition resisting in closed cycle mode |
CN111101905A (en) * | 2019-10-30 | 2020-05-05 | 青海中煤地质工程有限责任公司 | Brine well mining and well completion process for pore type brine seam of salt lake mining area |
CN112127831A (en) * | 2020-08-24 | 2020-12-25 | 山成栋 | Construction method for brine recovery well of salt lake |
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Title |
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