Device for simulating chemical-flooding mining of natural gas hydrates with row-type horizontal wells

Abstract

The invention discloses a device for simulating chemical-flooding mining of natural gas hydrates with row-type horizontal wells and relates to the field of mining of the natural gas hydrates. The device comprises a gas supply system, a liquid supply system, a simulating system, a fracturing system, a water injection system, a production system and a monitoring system. The device adopts a sand filling box as a main body of the simulating system, and a row-type horizontal well net can be simulated; natural gas and water are supplied to the simulating system through the gas supply system and theliquid supply system to form the natural gas hydrates; fracturing operation is conducted on a simulated natural gas hydrate reservoir through the fracturing system; displacement water and chemical agents are injected through the water injection system so as simulate chemical-flooding mining; mined gas and mined water are collected through the production system; and whole-process monitoring is conducted on the experiment process through the monitoring system. According to the experiment device, chemical-flooding mining of the natural gas hydrates is simulated in a three-dimensional mode, and acertain guiding effect on studying of the chemical-flooding mining mechanism of the natural gas hydrates is achieved.

Description

technical field [0001] The invention discloses a device for simulating the natural gas hydrate row-type horizontal well chemical flooding exploitation, relates to the field of natural gas hydrate development, and in particular is an indoor experimental device for simulating row-type horizontal well chemical flooding exploitation of natural gas hydrate. 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...

AI Technical Summary

Problems solved by technology

However, simply using the power system to heat gas hydrate storage cannot simulate the displacement operation of horizontal wells in actual production.

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