Experimental facility for simulating natural gas hydrate horizontal well fracturing

Abstract

The invention discloses an experimental facility for simulating natural gas hydrate horizontal well fracturing, and relates to the field of natural gas hydrate exploration. The experimental facility comprises a gas supply system, a liquid supply system, a simulation system, a production system, a fracturing system and a monitoring system. The experimental facility adopts a sand filling box as a main body of the simulation system to simulate a natural gas hydrate reservoir and a horizontal well spacing mode, the natural gas hydrate formed by natural gas and water is supplied to the interior ofthe simulation system through the gas supply system and the liquid supply system, depressurizing production is carried out on the simulated reservoir through the production system, fracturing operation is conducted on the simulated natural gas hydrate reservoir through the fracturing system, and whole-process monitoring is carried out on the experimental process through the monitoring system. Theexperimental facility adopts a three-dimensional visualized mode to execute simulated fracturing to extract the natural gas hydrate, collecting is conducted on fracturing crack parameters through X-ray imaging, and the experimental facility has certain guiding effects on research of the natural gas hydrate fracturing mechanism.

Description

technical field [0001] The invention discloses an experimental device for simulating natural gas hydrate horizontal well fracturing, relates to the field of natural gas hydrate development, in particular to an indoor experimental device for simulating natural gas hydrate fracturing operations. 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 ...

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Problems solved by technology

However, the inlet of the fracturing fluid injection pipeline is connected to the pressure plate on the upper part of the triaxial instrument, so it is difficult to simulate the wellbore fracturing method in actual production, which will have a certain impact on the accuracy of the experimental results, and the acoustic emission monitoring system is used to observe the fracturing effect , will also have a certain impact on the accuracy of the experimental results.

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