CN114151054A - Well drilling construction method for increasing yield and recharge quantity of geothermal well - Google Patents
Well drilling construction method for increasing yield and recharge quantity of geothermal well Download PDFInfo
- Publication number
- CN114151054A CN114151054A CN202111561182.6A CN202111561182A CN114151054A CN 114151054 A CN114151054 A CN 114151054A CN 202111561182 A CN202111561182 A CN 202111561182A CN 114151054 A CN114151054 A CN 114151054A
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- Prior art keywords
- well
- meters
- construction method
- geothermal
- yield
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- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 238000005553 drilling Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to the technical field of well drilling construction methods, in particular to a well drilling construction method for increasing the yield and the recharge quantity of a geothermal well, wherein the well drilling construction method is characterized in that the length of a water taking section is increased on a mining and recharging layer, the length of the water taking section and the total contact area of a stratum are increased, the length of the water taking section of the recharging well in normal construction is about 200 meters, and the recharge rate is about 30-40%; the length of the newly-increased water section is about 700 meters, which is 3.5 times of the length of the original water filtering pipe, and the recharge rate can be increased to about 105-140%.
Description
Technical Field
The invention relates to the technical field of drilling construction methods, in particular to a drilling construction method for increasing the yield and the recharge quantity of a geothermal well.
Background
The tail water of the geothermal well is irrigated back to the brow tip, geothermal resources are clean energy, the purpose of long-term utilization is achieved, and the irrigation back is a necessary way. The recharging difficulty is a main contradiction existing in geothermal utilization in China at present, and the conventional recharging rate is improved by the following methods: 1. the method is characterized in that the water injection pressure is increased, namely pressurized recharge, at present, the recharge pressure of part of geothermal enterprises is 2-5Mpa, too high pressure is enough to crack the stratum, and the recharge quantity is inevitably increased; 2. adopting an acidification measure, injecting acid liquor into the recharging well, and dissolving partial rock particles by utilizing the reaction of acid and carbonate rock to increase the permeability; 3. the method adopts fracturing measures, has obvious advantages and has the defect of higher cost of the fracturing measures; 4. the clay is prevented from expanding, the clay in the stratum can expand under the action of the reinjection water to block a water seepage channel, and the reinjection is difficult. The methods have the advantages and disadvantages, and have the characteristics of high cost, environmental pollution, high construction difficulty and the like.
Disclosure of Invention
The invention aims to solve the problem of how to effectively increase the yield and the recharge quantity of the geothermal well.
In order to solve the technical problems, the invention provides the following steps:
s1, reconstructing the geothermal well based on normal construction, and designing 2-3 windows at a position 100 meters above a target layer;
s2, placing a petroleum casing or a packer in a window of the geothermal well, opening a window at the position 50 m above the packer or placing the window into a window opener in advance, wherein a water taking layer is arranged in the geothermal well and used for construction of a next directional well;
s3, opening a window at the position 100 meters above the packer or putting the window opener in advance for the second directional well construction;
s4, directly constructing the limestone stratum without a casing; and (3) running an oil casing pipe with the length of 177.80 meters into a sandstone stratum, cementing the well by using cement, running a wood plug into the inclined shaft casing pipe at the position of 10 meters, and sealing the outer diameter of the casing pipe entering a target layer by using a water-stopping umbrella.
Because the length of the water taking section is increased in the mining and recharging layer, and the total contact area of the water taking section and the stratum is increased, the length of the water taking section of the recharging well in normal construction is about 200 meters generally, and the recharging rate is about 30-40%; the length of the newly-increased water section is about 700 meters, which is 3.5 times of the length of the original water filtering pipe, and the recharge rate can be increased to about 105-140%.
Detailed Description
The invention relates to a well drilling construction method for increasing the yield and the recharge quantity of a geothermal well, which comprises the following steps:
s1, reconstructing the geothermal well based on normal construction, and designing 2-3 windows at a position 100 meters above a target layer;
s2, placing a petroleum casing or a packer in a window of the geothermal well, opening a window at the position 50 m above the packer or placing the window into a window opener in advance, wherein a water taking layer is arranged in the geothermal well and used for construction of a next directional well;
s3, opening a window at the position 100 meters above the packer or putting the window opener in advance for the second directional well construction;
s4, directly constructing the limestone stratum without a casing; and (3) running an oil casing pipe with the length of 177.80 meters into a sandstone stratum, cementing the well by using cement, running a wood plug into the inclined shaft casing pipe at the position of 10 meters, and sealing the outer diameter of the casing pipe entering a target layer by using a water-stopping umbrella.
The process can improve yield and recharge quantity, and the main means of yield increase is to increase the length of the water intake section in the mining and recharging layer and increase the length of the water intake section and the total contact area of the stratum.
The water intake section of the normal construction recharging well is about 200 m in length, and the recharging rate is about 30-40%; the length of the newly-increased water section is about 700 meters, which is 3.5 times of the length of the original water filtering pipe, and the recharge rate can be increased to about 105-140%.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. A well drilling construction method for increasing the yield and the recharge quantity of a geothermal well is characterized by comprising the following steps of: the method comprises the following steps:
s1, reconstructing the geothermal well based on normal construction, and designing 2-3 windows at a position 100 meters above a target layer;
s2, placing a petroleum casing or a packer in a window of the geothermal well, opening a window at the position 50 m above the packer or placing the window into a window opener in advance, wherein a water taking layer is arranged in the geothermal well and used for construction of a next directional well;
s3, opening a window at the position 100 meters above the packer or putting the window opener in advance for the second directional well construction;
s4, directly constructing the limestone stratum without a casing; and (3) running an oil casing pipe with the length of 177.80 meters into a sandstone stratum, cementing the well by using cement, running a wood plug into the inclined shaft casing pipe at the position of 10 meters, and sealing the outer diameter of the casing pipe entering a target layer by using a water-stopping umbrella.
2. The well drilling construction method for increasing the yield and the recharge quantity of the geothermal well, according to claim 1, is characterized in that: the opening angle at which the number of windows in the step S1 is two is 180 °.
3. The well drilling construction method for increasing the yield and the recharge quantity of the geothermal well, according to claim 1, is characterized in that: the opening angle at which the number of windows in the step S1 is three is 120 °.
4. The well drilling construction method for increasing the yield and the recharge quantity of the geothermal well, according to claim 1, is characterized in that: the depth of the water intake layer in the step S2 is 200 meters.
5. The well drilling construction method for increasing the yield and the recharge quantity of the geothermal well, according to claim 1, is characterized in that: the diameter of the petroleum casing pipe in the step S2 is phi 244.5 mm.
6. The well drilling construction method for increasing the yield and the recharge quantity of the geothermal well, according to claim 1, is characterized in that: in the step S2, the inclination angle of the directional well is 60 degrees, the inclination depth is 440 meters, and the length of the well pipe in the water taking layer is 340 meters.
7. The well drilling construction method for increasing the yield and the recharge quantity of the geothermal well, according to claim 1, is characterized in that: in the step S3, the inclination angle of the directional well is 60 degrees, the inclination depth is 520 meters, and the well depth length in the water taking layer is 360 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561182.6A CN114151054A (en) | 2021-12-20 | 2021-12-20 | Well drilling construction method for increasing yield and recharge quantity of geothermal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561182.6A CN114151054A (en) | 2021-12-20 | 2021-12-20 | Well drilling construction method for increasing yield and recharge quantity of geothermal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151054A true CN114151054A (en) | 2022-03-08 |
Family
ID=80451554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111561182.6A Pending CN114151054A (en) | 2021-12-20 | 2021-12-20 | Well drilling construction method for increasing yield and recharge quantity of geothermal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151054A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948795A (en) * | 2017-03-30 | 2017-07-14 | 中国石油大学(北京) | A kind of method that multi-branched horizontal well closed cycle develops hot water type underground heat |
| CN111043780A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工集团公司 | Hydrothermal multi-branch directional mining and grouting geothermal well and construction method |
| CN212390640U (en) * | 2020-06-08 | 2021-01-22 | 东营明汇新能源科技有限公司 | Directional branch well device of middle-deep geothermal recharge well |
| CN213898935U (en) * | 2020-11-05 | 2021-08-06 | 陕西兴正伟新能源科技有限公司 | Sandstone geothermal well structure |
| CN214366026U (en) * | 2021-01-27 | 2021-10-08 | 东营明汇新能源科技有限公司 | High-efficient ecological oil-water separation system |
-
2021
- 2021-12-20 CN CN202111561182.6A patent/CN114151054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948795A (en) * | 2017-03-30 | 2017-07-14 | 中国石油大学(北京) | A kind of method that multi-branched horizontal well closed cycle develops hot water type underground heat |
| CN111043780A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工集团公司 | Hydrothermal multi-branch directional mining and grouting geothermal well and construction method |
| CN212390640U (en) * | 2020-06-08 | 2021-01-22 | 东营明汇新能源科技有限公司 | Directional branch well device of middle-deep geothermal recharge well |
| CN213898935U (en) * | 2020-11-05 | 2021-08-06 | 陕西兴正伟新能源科技有限公司 | Sandstone geothermal well structure |
| CN214366026U (en) * | 2021-01-27 | 2021-10-08 | 东营明汇新能源科技有限公司 | High-efficient ecological oil-water separation system |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 057650 north side of Jinguang Yuan Road, Guang Ping County, Handan, Hebei Applicant after: Hebei Weiye Geothermal New Energy Technology Co.,Ltd. Address before: 057650 north side of Jinguang Yuan Road, Guang Ping County, Handan, Hebei Applicant before: HANDAN WEIYE GEOTHERMAL DEVELOPMENT CO.,LTD. |
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| CB02 | Change of applicant information |