A kind of preparation device and preparation method of diagenetic natural gas hydrate

Abstract

The invention provides a preparation device and method of diagenetic natural gas hydrate, which relates to the field of preparation of natural gas hydrate. The device includes a water tank, a natural gas cylinder, a vacuum pump, a cold water storage tank, a hydraulic press and a natural gas hydrate synthesis device. The water tank , pre-cooling system, water injection pump and high-pressure atomizer are connected in sequence, natural gas cylinders, pre-cooling system, gas booster pump, and high-pressure atomizer are connected in sequence, and the high-pressure atomizer is set in the synthesis reactor. The invention can realize the synthesis of customized stratum natural gas hydrate, and provides technical support for the development of experimental test data and subsequent exploitation technology of natural gas hydrate.

Description

technical field [0001] The invention relates to the technical field of preparation of natural gas hydrates, in particular to a preparation device and method for diagenetic natural gas hydrates. Background technique [0002] Natural Gas Hydrate (Natural Gas Hydrate / Gas Hydrate), a white crystalline solid organic compound that looks like ice or dense like snow, chemical formula CH 4 ·xH 2 O. Flammable ice is an ice-like crystalline substance that is distributed in deep-sea sediments or permafrost in land areas and is formed by natural gas and water under high pressure (>10MPa) and low temperature (<10°C) conditions. Non-stoichiometric clathrates of natural gas and water. 1 cubic meter of combustible ice can be converted into 164 cubic meters of natural gas and 0.8 cubic meters of water. During exploitation, a large amount of methane gas can be released only by raising the temperature and depressurizing the solid "natural gas hydrate". Under high pressure, the methan...

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Problems solved by technology

[0007] 1. The above-mentioned natural gas hydrates cannot truly simulate the state of natural hydrates generated in the formation, and the existing equipment has a low yield in the process of forming products and cannot be mass-produced in the industry, so it is urgent to improve them

[0008] 2. Most of the above-mentioned natural gas hydrates cannot form formed natural gas hydrates, and thus cannot be used in laboratory experiments, and cannot be placed in laboratory core holders to simulate formation conditions for gas flooding replacement or chemical flooding Replace the methane in the natural gas hydrate, so as to simulate the real natural conditions for the exploitation of natural gas hydrate, and obtain the corresponding experimental data, and further formulate the plan for the exploitation of natural gas hydrate

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