Rapid solution construction method for rock salt cavity

A salt karst cavity and construction method technology, which is applied to the mining of underground salt deposits and the construction of salt karst cavity, the rapid dissolution of salt minerals, and the high-efficiency and low-cost construction of salt karst cavity, can solve the problem of high construction cost, long cavity construction time, and high cost. Problems such as low solution concentration, to achieve the effect of improving the construction speed

Inactive Publication Date: 2010-11-10
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of a fast-dissolving salt rock karst cavity construction method of the present invention is to overcome the shortcomings of the traditional single well water-soluble mining solution concentration, long cavity construction time, low production efficiency, and high construction cost, and provide a low-cost, high recovery rate, High-efficiency, economical and environmentally friendly solution mining of salt deposits or construction method of salt rock solution cavity storage

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  • Rapid solution construction method for rock salt cavity
  • Rapid solution construction method for rock salt cavity
  • Rapid solution construction method for rock salt cavity

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Experimental program
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Effect test

Embodiment approach 1

[0020] reference figure 1 , 2 As shown,

[0021] A quick-dissolving salt karst cavity construction method, its steps are:

[0022] (1) Drill a single well from the surface to the target deposit;

[0023] (2) After the pipe string system is installed according to the conventional method, in the initial stage of the cavity dissolution construction, the distance between the two pipe ports is 25m, and the positive circulation method is adopted to inject water from the central pipe and the brine to produce the intermediate pipe;

[0024] (3) The cavity is constructed from the bottom of the cavity, and then enters the construction phase of the cavity body. The cavity radius is gradually increased to 30m, and the distance between the two pipes is 45m. The reverse circulation method is adopted to inject fresh water and the center from the middle pipe. Pipe out brine for production;

[0025] (4) In the main stage of cavity construction, the height of the cavity increases continuously, and the t...

Embodiment approach 2

[0028] reference figure 1 , 2 As shown,

[0029] A quick-dissolving salt karst cavity construction method, its steps are:

[0030] (1) Drill a single well from the surface to the target deposit;

[0031] (2) After the pipe string system is installed according to the conventional method, in the initial stage of the cavity dissolution construction, the distance between the two pipe ports is 30m, and the positive circulation method is adopted to inject water from the central pipe and the brine to produce the intermediate pipe;

[0032] (3) When the cavity is constructed, the bottom of the cavity is constructed first, and then the main body of the cavity is constructed. The cavity radius is gradually increased to 30m, and the distance between the two pipes is 50m. The reverse circulation method is adopted to inject fresh water from the middle pipe and exit from the center pipe. Brine for production;

[0033] (4) In the main stage of cavity construction, the height of the cavity increases c...

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Abstract

The invention relates to a rapid solution construction method for a rock salt cavity, belonging to the field of salt deposit solution mining and rock salt cavity reservoir controlled solution construction. The method is characterized in that the method comprises the following steps that: (1) a single well is drilled from ground to a target deposit; (2) after a pipe string system is installed according a conventional method, direct and reverse circulating solution can be conducted to construct a cavity through a water filling pipe string system and a water draining pipe string system; and (3) in the process of direct and reverse circulating solution to construct the cavity through water filling and water draining, according to the variation of the size and the dimension of the cavity, the positions of water filling pipe columns and water draining pipe columns and the spacing thereof are adjusted in time to keep the migration velocity of fluid near the wall of the cavity and the rock salt solution velocity to be highest. Since the positions of water filling pipe columns and water draining pipe columns and the spacing thereof are scientifically adjusted to increase the convective diffusion velocity of solution near the wall of the cavity and to further increase the rock salt solution velocity and the cavity construction velocity, the goals of economic rock salt resource mining and high-efficiency rapid low-cost rock salt cavity construction are reached. The method is an ideal method for high-efficiency mining of rock salt and rapid solution construction of rock salt cavity reservoirs.

Description

Technical field [0001] The invention relates to a method for constructing a rapidly dissolving salt karst cavity, belonging to the technical category of salt ore deposit water solution mining technology, suitable for underground salt ore deposit mining and salt karst cavity construction, and is a salt mineral rapid dissolution, salt karst cavity with high efficiency and low cost The technical method of construction. Background technique: [0002] Due to the characteristics of salt minerals that are easily soluble in water, the mining of underground salt minerals usually adopts water-soluble mining methods. Commonly used water solution mining methods include: single well convection method, double well hydraulic fracturing connected convection method, double well directional butt connected connected convection method, group well fracturing connected controlled dissolution method, etc. According to different geological conditions, different methods can be adopted to mine salt resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/28
Inventor 梁卫国杨晓琴徐素国高红波赵阳升杨海军屈丹安于艳梅
Owner TAIYUAN UNIV OF TECH
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