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Groove expansion method in full horizontal section of butt joint shaft in ultra-deep salt mine

A technology for horizontal sections and salt mines, applied in drilling equipment and methods, directional drilling, surface mining, etc., to achieve the effect of ensuring connectivity, expanding size, and expanding volume

Active Publication Date: 2021-10-22
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for expanding slots in the full horizontal section of brine butt mining in salt mines, which solves or partially solves the technical problem of shutting down the horizontal section caused by creep closure in the prior art

Method used

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  • Groove expansion method in full horizontal section of butt joint shaft in ultra-deep salt mine
  • Groove expansion method in full horizontal section of butt joint shaft in ultra-deep salt mine
  • Groove expansion method in full horizontal section of butt joint shaft in ultra-deep salt mine

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Embodiment Construction

[0028] see Figure 1-5 According to the embodiment of the present invention, a method for expanding slots in the full horizontal section of brine butt mining in salt mines includes the following steps:

[0029] The deviated shaft 1 is drilled, and the end of the horizontal section of the deviated shaft 1 connects with the vertical shaft 3 through the horizontal chamber 2 at the bottom of the salt layer.

[0030] In the deflection shaft 1, the water injection pipe 4 is lowered to drive the jet pipe 5 to reach the horizontal chamber 2, so that the water injection pipe 4 is lowered into the entire horizontal chamber, and the jet pipe 5 is distributed in the horizontal chamber.

[0031] The water injection pipe 4 supplies high-pressure clean water to the jet pipe 5, and the jet pipe 5 forms a uniform water jet area within the range of the horizontal chamber 2, and evenly scours the salt rock around the horizontal chamber 2, so that the salt rock around the horizontal chamber 2 is ...

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Abstract

The invention discloses a full-horizontal groove expansion method for butt mining brine in a salt mine, which belongs to the technical field of underground storage of oil and natural gas. The method for expanding slots in the full horizontal section of brine butt mining in salt mines includes the following steps: in the deflection shaft, the water injection pipe is lowered to drive the jet pipe to reach the horizontal chamber, so that the water injection pipe is lowered into the entire horizontal chamber, and the jet pipe is distributed in the horizontal chamber. cavity; through the water injection pipe to supply high-pressure clean water to the jet tube, the jet tube forms a uniform water jet area within the range of the horizontal cavity, and evenly scours the salt rock around the horizontal cavity, so that the salt rock around the horizontal cavity is quickly dissolved, and the entire horizontal section of the horizontal cavity Carry out slot expansion. The groove expansion method of the full horizontal section of the salt mine butt mining brine of the present invention can promptly and rapidly expand the size of the horizontal cavity, and quickly expand the horizontal cavity before the horizontal cavity creeps and shrinks and blocks, ensuring the connectivity of the horizontal gas storage and expanding the storage capacity. The volume of the horizontal cavity of the gas storage.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas underground reserves, in particular to a method for expanding grooves in the full horizontal section of an ultra-deep salt mine butt joint well for brine mining. Background technique [0002] Salt rock is recognized as the most ideal medium for energy storage and permanent disposal of high-radioactive nuclear waste due to its good creep, low permeability and damage self-recovery properties. As the advantages of salt cavern utilization become more and more known, salt cavern storage is gradually developed into deeper formations. When the depth exceeds 2000m, the salt mine is called an ultra-deep salt mine. The temperature and pressure in the salt cavity of the ultra-deep salt mine are greatly increased, and the sensitivity of salt rock to temperature is much higher than that of ordinary rock. [0003] Under the condition of high temperature and high pressure, the mechanical properties ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/00E21B7/06E21B7/04E21C41/20
CPCE21B7/046E21B7/06E21B21/00E21C41/20
Inventor 李朋李银平马洪岭施锡林杨杰刘元玺赵凯赵阿虎
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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