Chemical flooding photoetching glass model microcosmic experiment device for natural gas hydrates

Abstract

The invention discloses a chemical flooding photoetching glass model microcosmic experiment device for natural gas hydrates and relates to the field of natural gas hydrate development. The device comprise a gas supply system, a liquid supply system, a simulation pore model system, a chemical flooding system, a production system and a monitoring system. In the device, photoetching glass is adopted to serve as the main body of the simulation pore model system, nature gas and water are injected into the simulation pore model system through the gas supply system and the liquid supply system so as to form the natural gas hydrates, a chemical agent is injected through the chemical flooding system so as to simulate chemical flooding exploitation, the products decomposed by the natural gas hydrates are collected through the production system, and the growth and decomposition parameters of crystals in the natural gas hydrate experiment process are collected through the monitoring system. The photoetching glass used in the device is made in the mode that plain glass is subjected to precise photoetching by using a photochemical etching technology according to the real pores of natural core casting body slices, the precision of the experiments is ensured, and a certain guidance effect on research on the natural gas hydrates is achieved.

Description

technical field [0001] The invention discloses a micro-experiment device for a photolithographic glass model of natural gas hydrate chemical 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. According to...

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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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