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Natural gas hydrate exploitation method and device based on heat pipe technology

A mining method and technology for natural gas, applied in the fields of mining fluids, chemical instruments and methods, gas fuels, etc., can solve the problems of heat loss, large energy consumption, etc., and achieve the effects of improving utilization efficiency, reducing production costs, and abundant reserves

Pending Publication Date: 2021-11-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the traditional heat injection method consumes a lot of energy and the heat loss is serious in the process of long-distance transportation, the present invention proposes a natural gas hydrate production method and device based on heat pipe technology

Method used

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  • Natural gas hydrate exploitation method and device based on heat pipe technology
  • Natural gas hydrate exploitation method and device based on heat pipe technology
  • Natural gas hydrate exploitation method and device based on heat pipe technology

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Embodiment 1

[0036] Such as figure 1 As shown, a natural gas hydrate exploitation system based on solar thermochemical energy storage technology includes: marine natural gas hydrate exploitation system, solar thermochemical energy storage system and gas-liquid separator 15; The injection well and the production well of the natural gas hydrate reservoir 8, the injection well comprises the vertical section 6 of the injection well and the horizontal section 10 of the injection well located in the natural gas hydrate reservoir, the vertical section 6 of the injection well and the horizontal section 10 of the injection well The horizontal section 10 is connected; the production well includes a production well vertical section 12 and a production well horizontal section 13 located in the natural gas hydrate reservoir, and the production well vertical section 12 is connected with the production well horizontal section 13 or the injection well horizontal section 10 connection; solar thermochemical...

Embodiment 2

[0038]A method for exploiting natural gas hydrate based on solar thermochemical energy storage technology, comprising the steps of:

[0039] S1. The depressurization method is used for mining in the initial stage. The hydrate in the natural gas hydrate reservoir 8 decompresses and decomposes to produce natural gas. The natural gas carrying liquid components flows to the horizontal section 13 of the production well, and then passes through the production well vertically. Section 12, the wellhead 14 of the production well is transported to the gas-liquid separator 15, thereby obtaining the required product methane gas;

[0040] S2. When the pressure of the natural gas hydrate reservoir 8 drops below 15% of the hydrate phase equilibrium pressure corresponding to the reservoir temperature, start the solar thermochemical energy storage system for heat supply, that is, through the solar thermal decomposition reactor 1 Absorbing solar energy causes thermal decomposition of the thermo...

Embodiment 3

[0044] A method for exploiting natural gas hydrate based on solar thermochemical energy storage technology, comprising the steps of:

[0045] In this embodiment, the temperature change of the solar thermochemical energy storage unit is taken as an example, and the continuous experiment is carried out from 9:00 am to 16:00 pm during the daytime, and the temperature change is recorded. The recorded temperature points include the ambient temperature, the The temperature conditions of 1, 2, 3, and 4 in the drawings of the description.

[0046] Connect solar thermochemical energy storage unit parts 1, 2, 3, and 4 in order, fill 100ml of thermochemical energy storage working medium, wait for the working condition to stabilize, and continuously monitor the ambient temperature, solar thermochemical energy storage unit parts 1, 2, 3 , the temperature in 4, the experimental time is from 9:00 in the morning to 16:00 in the afternoon, the temperature obtained by monitoring is as follows ...

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Abstract

The invention discloses a natural gas hydrate exploitation method and device based on a heat pipe technology. The natural gas hydrate exploitation device comprises a marine natural gas hydrate exploitation system, wherein the marine natural gas hydrate exploitation system comprises a plurality of injection wells and extraction wells which extend to a natural gas hydrate reservoir; each injection well comprises an injection well vertical section and an injection well horizontal section positioned in the natural gas hydrate reservoir; and each extraction well comprises an extraction well vertical section and an extraction well horizontal section positioned in the natural gas hydrate reservoir. The invention also discloses a natural gas hydrate exploitation method based on a solar thermochemical energy storage technology. The method and the system are adopted to exploit hydrates, abundant renewable solar energy resources in a sea area are fully utilized, and the thermochemical energy storage technology is combined, so that loss in a heat transport process is effectively avoided, energy cost investment in hydrate heat injection method exploitation is greatly reduced, and the method and the device are suitable for large-scale exploitation of natural gas hydrate resources.

Description

technical field [0001] The invention relates to the field of natural gas hydrate exploitation, in particular to a natural gas hydrate exploitation method and device based on heat pipe technology. Background technique [0002] Natural gas hydrate is a non-stoichiometric cage-type crystalline compound formed by gas molecules such as methane, ethane, carbon dioxide, hydrogen sulfide, and water molecules under specific conditions, and is widely found in sediments on submarine slopes and land permafrost in the pores of porous media. As a clean and efficient energy source, natural gas hydrate is widely distributed around the world and has a large amount of resources. Its carbon content is about twice that of existing fossil fuels. [0003] The exploitation of natural gas hydrate is to achieve the purpose of decomposing and producing natural gas by breaking its thermodynamic stability under the original conditions. The common methods mainly include heat injection method, depressu...

Claims

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Application Information

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IPC IPC(8): E21B43/01E21B43/24E21B43/34E21B43/30B01J19/00C10L3/10
CPCE21B43/01E21B43/24E21B43/34E21B43/305B01J19/0053B01J19/0013B01J19/0006C10L3/10C10L3/108B01J2219/00135B01J2219/00058
Inventor 郎雪梅陈建标樊栓狮王燕鸿李刚
Owner SOUTH CHINA UNIV OF TECH
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