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An experimental simulation device and method for exploiting natural gas hydrate

A technology of experimental simulation and hydrate, which is applied in the direction of mining fluid, gas fuel, earth drilling, etc., can solve the problems of low replacement efficiency, slow replacement rate, hydrate decomposition, etc., and achieve low cost, prevention of decomposition, and easy operation Effect

Active Publication Date: 2016-10-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] for CO 2 Li Xiaosen et al. have publicly invented the patent "A Simulation Method and Experimental Device for Carbon Dioxide Replacement Exploitation of Natural Gas Hydrate". In the temperature range of hydrate self-protection effect, some hydrates will still decompose
And this invention still can not solve CO 2 Disadvantages such as low replacement efficiency and slow replacement rate for natural gas hydrate replacement

Method used

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  • An experimental simulation device and method for exploiting natural gas hydrate
  • An experimental simulation device and method for exploiting natural gas hydrate

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Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, an experimental simulation device for exploiting natural gas hydrate, including a stable pressure gas supply and liquid supply module, a reactor 8, a control module, a data measurement module, and a data acquisition and processing module, wherein:

[0039] The reactor 8 includes a kettle body 48, a piston 37 that is sealed and can move up and down with the inner wall of the kettle body 48, a kettle cover 47 that is connected to the top of the kettle body 48, and supports a support 12 that is arranged at the bottom of the kettle body 48. The kettle lid 47 is provided with a pressure detection interface 44, a gas inlet and outlet 45, and a temperature detection interface 46 that can be connected to the inner cavity of the kettle body 48. The end of the inner cavity of the kettle body 48 near the kettle lid 47 is equipped with a microporous filter 35 , to achieve uniform distribution of pressure, the piston 37 is provided with a third temperature...

Embodiment 2

[0047] A method of producing natural gas hydrates, comprising the steps of:

[0048] (1) Generate hydrate: place the piston 37 at the bottom of the reactor 8, add a certain amount of sodium lauryl sulfate solution into the reactor 8, vacuumize, open the fourth valve 21, the seventh valve 30, and Reactor 8 is filled with CH 4 To a pressure of 4MPa, adjust the temperature of the constant temperature tank 4, under the conditions of a temperature of 1°C and a pressure of 4MPa, the reaction time is 100h to form a hydrate;

[0049] (2) CO 2 Reserve: when generating hydrate, close the first valve 7, 2 The gas is charged into the buffer tank 5, and the volume of the buffer tank 5 is 100ml, and the CO entering the buffer tank 5 is measured with a mass flow meter 3 2 amount;

[0050] (3) Isobaric exhaust: After the hydrate is formed, open the second valve 13 and the third valve 16, and use the hand pump 17 to inject a certain mass fraction of brine into the bottom of the reactor 8 f...

Embodiment 3

[0059] A method of producing natural gas hydrates, comprising the steps of:

[0060] (1) Generate hydrate: place the piston 37 at the bottom of the reactor 8, add a certain amount of sodium lauryl sulfate solution into the reactor 8, vacuumize, open the fourth valve 21, the seventh valve 30, and Reactor 8 is filled with CH 4 To a pressure of 8MPa, adjust the temperature of the constant temperature tank 4, under the conditions of a temperature of 6°C and a pressure of 8MPa, the reaction time is 50h to form a hydrate;

[0061] (2) CO 2 Reserve: when generating hydrate, close the first valve 7, 2 The gas is charged into the buffer tank 5, and the volume of the buffer tank 5 is 500ml, and the CO entering the buffer tank 5 is measured with a mass flow meter 3 2 amount;

[0062] (3) Isobaric exhaust: After the hydrate is formed, open the second valve 13 and the third valve 16, and use the hand pump 17 to inject a certain mass fraction of brine into the bottom of the reactor 8 from...

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Abstract

The invention discloses an experimental simulation device and method for exploiting natural gas hydrate. The experimental simulation device includes a stable pressure gas supply and liquid supply module, a reactor, a control module, a data measurement module, and a data acquisition and processing module; the method After the hydrate is formed, the unreacted gas is discharged isobarically, and then the hydrate is compressed into a dense hydrate sheet, and CO is injected into one side of the hydrate sheet. 2 gas, the other side is depressurized to achieve CO 2 Combination of displacement and depressurization methods for recovering gas hydrates. The present invention not only overcomes the CO 2 Displacement mining of natural gas hydrate has disadvantages such as low efficiency and slow rate, and solves the problem of geological disasters that may be caused by depressurization mining of natural gas hydrate, improves the efficiency of natural gas hydrate mining, and has a simple structure and low cost.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate exploitation, in particular to an experimental simulation device and method for exploiting natural gas hydrate. Background technique [0002] Natural gas hydrate is a non-stoichiometric cage-like crystal hydrate formed by natural gas and water under certain temperature conditions. Gas hydrates widely exist in deep seabeds and permafrost areas. It is estimated that the amount of gas hydrates contained in the shallow lithosphere with a global depth of less than 2000m is equivalent to twice the sum of proven conventional fossil fuels. Therefore, the exploitation of natural gas hydrate has attracted more and more attention. The traditional methods for exploiting natural gas hydrate mainly include depressurization method, thermal shock method, chemical reagent method and the combination of the above methods. These methods destroy the equilibrium conditions of natural gas hydrates through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16C10L3/08
Inventor 樊栓狮闫素贞温永刚郎雪梅王燕鸿
Owner SOUTH CHINA UNIV OF TECH
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