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 PDF

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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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CN
China
Prior art keywords
well
meters
construction method
geothermal
yield
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Pending
Application number
CN202111561182.6A
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Chinese (zh)
Inventor
阴文成
宋利丰
阴文行
尹献涛
李达
封优生
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Handan Weiye Geothermal Development Co ltd
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Handan Weiye Geothermal Development Co ltd
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Publication date
Application filed by Handan Weiye Geothermal Development Co ltd filed Critical Handan Weiye Geothermal Development Co ltd
Priority to CN202111561182.6A priority Critical patent/CN114151054A/en
Publication of CN114151054A publication Critical patent/CN114151054A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00Cutting 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
    • E21B29/06Cutting windows, e.g. directional window cutters for whipstock operations
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices or the like
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/04Directional drilling

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  • 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

Well drilling construction method for increasing yield and recharge quantity of geothermal well
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.
CN202111561182.6A 2021-12-20 2021-12-20 Well drilling construction method for increasing yield and recharge quantity of geothermal well Pending CN114151054A (en)

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

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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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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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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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