Device for testing dielectric property of hydrate in sediment

Abstract

The invention discloses a device for testing the dielectric property of hydrate in sediment. The device comprises a built-in reaction kettle, a gas supply system, a vacuuming system, a data acquisition system, a temperature control system and a measuring system, wherein the measuring system comprises a Q meter, an anti-interference shielding line as well as a detachable capacitance testing chamber, a first columnar electrode, a second columnar electrode and tin films; a sample loading piece is arranged in the middle of the detachable capacitance testing chamber; the tin films are adhered to one end surface of the first columnar electrode and one end surface of the second columnar electrode; the tin films are further respectively in contact with two ends of a sample; the other end surfaces of the first columnar electrode and the second columnar electrode are respectively embedded into two opposite sides of the detachable capacitance testing chamber and are elastically fixed; the measuring system further comprises an inductance component; the first columnar electrode and the second columnar electrode are connected with the Q meter through the anti-interference shielding line and the inductance component. By adopting the device, the medium consumption factor and the dielectric constant of a solid insulating material can be measured in situ under extreme conditions of high pressure and low temperature, the application range of a conventional device at different temperatures and different pressure intensities is expanded, and the measurement precision is improved.

Description

technical field [0001] The invention relates to a testing device for in-situ measurement of the dielectric loss of insulating solid materials, including the dielectric loss factor and dielectric constant of the insulating material, in particular to an in-situ synthesis of hydrates in porous media at high pressure and low temperature and their dielectric loss and dielectric constant testing device. Background technique [0002] Gas hydrate is an ice-like solid formed by gas (or volatile liquid) and water under certain temperature and pressure conditions, commonly known as combustible ice, widely distributed in the sediments below the surface of the tundra and under the seabed at the continental margin middle. Natural gas hydrate has huge natural gas storage capacity. The ideal structure type I methane hydrate contains 164 times the methane gas in the standard state, and the type II structure gas hydrate contains 184 times the natural gas in the standard state. The natural g...

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Problems solved by technology

However, the existing dielectric loss and dielectric constant devices are mainly designed at normal temperature and pressure, which cannot meet the in-situ measurement of natural gas hydrate under low temperature and high pressure conditions.

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