Seawater driven photolithographic glass model microscopic experiment device for NGH (natural gas hydrate)

Abstract

The invention discloses a seawater driven photolithographic glass model microscopic experiment device for NGH (natural gas hydrate) and relates to the field of NGH exploitation. The device comprises agas supply system, a liquid supply system, a simulated pore model system, a seawater injection system, a production system and a monitoring system. According to the device, photolithographic glass istaken as a main body of the simulated pore model system, natural gas and water are supplied to the simulated pore model system by the gas supply system and the liquid supply system to form NGH, seawater is injected by the seawater injection system to simulate seawater injection exploitation, NGH decomposed products are collected by the production system, and crystal growing and decomposing parameters in the experiment process of NGH are collected by the monitoring system; the photolithographic glass is prepared with a photochemical etching technology by precisely photolithographing real poresof natural core casting slices onto plain glass, so that precision of the experiment is guaranteed, and the device has certain guidance function for study of NGH physical nature.

Description

technical field [0001] The invention discloses a microscopic experimental device for a photolithographic glass model of natural gas hydrate seawater flooding, and relates to the field of natural gas hydrate development. Background technique [0002] Natural gas hydrate (NGH for short) is a non-stoichiometric clathrate compound formed by natural gas and water at a certain low temperature and high pressure, also known as "combustible ice". 1m 3 Natural gas hydrate can contain 164m 3 methane gas and 0.8m 3 of water. "Combustible ice" is a secondary product of natural gas, and its application range is roughly the same as that of natural gas. It is a typical oil substitute. "Combustible ice" is extremely flammable. Under the same conditions, the energy generated by the combustion of "combustible ice" is dozens of times higher than that of coal, oil, and natural gas. It is known as "the super energy of the future". [0003] my country is rich in combustible ice reserves. Acco...

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Problems solved by technology

However, after the natural gas hydrate sample is placed on the sample stage, the changes on the surface of the sample can only be observed through a microscope, and it is difficult to observe the growth and decomposition process of the hydrate inside the sample; and the device of its invention has only one gas inlet and coolant inlet. It is difficult to achieve uniform saturation when saturated with natural gas and coolant, which will have a certain impact on the accuracy of experimental results

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