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Device for preparing suspended natural gas hydrate and preparation method thereof

A hydrate and natural gas technology, applied in gas fuel, petroleum industry, solid fuel, etc., can solve the problems of seismic wave velocity, wave velocity attenuation characteristics, and geophysical detection data are very different, and cannot be well developed. Effect

Inactive Publication Date: 2012-10-03
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing hydrates prepared under laboratory conditions are generally cemented or contacted, and there is no method that is relatively successful in generating suspended hydrates in porous media, and suspended hydrates, cemented hydrates The geophysical detection data such as seismic wave velocity, wave velocity attenuation characteristics, and resistivity of hydrates in the hydrate state and contact hydrates are quite different, which leads to the inability to carry out subsequent geophysical and in-situ mining hydrates. Work

Method used

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  • Device for preparing suspended natural gas hydrate and preparation method thereof
  • Device for preparing suspended natural gas hydrate and preparation method thereof
  • Device for preparing suspended natural gas hydrate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The device for preparing suspended natural gas hydrate is composed of three parts: low-temperature circulating refrigeration device, microwave heating device and hydrate reaction kettle;

[0054] ——The low-temperature circulation refrigeration device is composed of the low-temperature refrigeration liquid circulation pump 1 through the circulation pump outlet pipeline 2, the circulation pump outlet valve 3, the shielded booster pump 4, the booster pump connection valve 5 and the core freezer inlet 6 and the cylindrical type The rock core freezer 7 is connected, the bottom of the sample tube 10 is connected to the sample tube base 8 by threads, and the top of the sample tube 10 is connected to the upper end cap 11 of the sample tube by threads, the skeleton material 9 and deionized water are housed in the sample tube 10, and the skeleton material is a Silicon carbide with absorbing function. The annular gap formed between the sample tube base 8, the sample tube 10, the u...

Embodiment 2

[0069] The device for preparing suspended natural gas hydrate is composed of three parts: low-temperature circulating refrigeration device, microwave heating device and hydrate reaction kettle;

[0070] ——The low-temperature circulation refrigeration device is composed of the low-temperature refrigeration liquid circulation pump 1 through the circulation pump outlet pipeline 2, the circulation pump outlet valve 3, the shielded booster pump 4, the booster pump connection valve 5 and the core freezer inlet 6 and the cylindrical type The rock core freezer 7 is connected, the bottom of the sample tube 10 is connected to the sample tube base 8 by threads, and the top of the sample tube 10 is connected to the upper end cap 11 of the sample tube by threads, the skeleton material 9 and deionized water are housed in the sample tube 10, and the skeleton material is a Pyroxene with absorbing function. The annular gap formed between the sample tube base 8, the sample tube 10, the upper en...

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Abstract

The invention relates to a device for preparing a suspended natural gas hydrate and a preparation method thereof. The device comprises a low-temperature circulating freezing device, a microwave heating device and a hydrate reaction kettle. The preparation method comprises the following steps of: coating a water repellent on a skeleton material, placing into a sample tube, freezing at low temperature, putting into the microwave heating device, carrying out microwave heating on the skeleton material in the sample tube while rotating, removing an end cover and a base, putting into a stainless steel reaction kettle, opening a throttle valve to fully react methane gas and ice particles, and injecting artificial seawater to suspend the skeleton material in hole water so as to prepare the suspended natural gas hydrate. When the microwave heating is adopted, the heating is remarkable, the interior of a sample absorbs less microwave quantity, the heating is not remarkable, the temperature gradient at low-temperature freezing is compensated, and advantages are created for generating the uniform suspended natural gas hydrate by the reaction of the methane gas and the ice particles. The skeleton material is subjected to surface treatment, so that the skeleton material has hydrophobic property so as to avoid from covering a natural gas hydrate layer on the skeleton material.

Description

technical field [0001] The invention relates to a natural gas hydrate preparation device and method, in particular to a device and a preparation method for preparing suspended natural gas hydrate. technical background [0002] Natural gas hydrate (Natural Gas Hydrates) is a snow-like crystalline compound with a cage structure composed of water molecules and hydrocarbon gas molecules. Because the gas molecules in it are methane (CH 4 ) mainly (>90%), so it is also called methane gas hydrate or "combustible ice". The basic factors that determine the conditions for the formation and stable existence of gas hydrates are: sufficient gas and water exist, which are related to gas composition, water phase state, water composition, temperature, pressure and pH value. Natural gas hydrates are formed at low temperature (0-10°C) and high pressure (>10MPa). In marine sedimentary strata, natural gas hydrates that exist in sediment pores may exist in three forms between sediment s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10C10L7/00
Inventor 彭枧明甘心罗永江何将福张鑫鑫吴冬宇王维陈宝义姚佳琪张强
Owner JILIN UNIV
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