Natural gas hydrate deposit dynamic triaxial mechanic-acoustic-electrical synchronous test experimental device and method

Abstract

The invention provides a natural gas hydrate deposit dynamic triaxial mechanic-acoustic-electrical synchronous test experimental device, and a test method. The natural gas hydrate deposit dynamic triaxial mechanic-acoustic-electrical synchronous test experimental device comprises an acoustic wave receiving device, an acoustic wave transmitting device, and a resistivity testing device. The natural gas hydrate deposit dynamic triaxial mechanic-acoustic-electrical synchronous test experiment method comprises the steps that: step A, a hydrate sample is synthesized; step B, the synthesized hydrate sample is subjected to dynamic loading, and electric-acoustic-mechanical property tests are simultaneously carried out, until the sample is subjected to shearing damage. The invention provides a mechanical response characteristic research of indoor hydrate deposit under dynamic load. With the device and the method, mechanical, electrical, and acoustic parameter synchronous testing of hydrate deposit under dynamic load can be realized. With the test data, a relationship between mechanical parameters and wave velocity can be obtained by fitting.

Description

technical field [0001] The invention relates to an experimental device and method for dynamic triaxial mechanical-electrical-acoustic simultaneous testing of natural gas hydrate deposits, the main function of which is to study the mechanical response of natural gas hydrate deposits and permafrost formations under longitudinal waves and external dynamic loads characteristic. Background technique [0002] Since the beginning of the 21st century, with the reduction of recoverable oil and gas resources and the increase of consumption, the exploration and development of unconventional energy such as natural gas hydrate has been officially put on the agenda. Because the hydrate reservoirs in the actual nature are in a dynamic environment, such as earthquakes, sea level rises and even human disturbances (drilling and mining), etc. Therefore, the mechanical properties of hydrate-bearing formations, especially the mechanical properties of hydrate formations under dynamic loads, are ...

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Problems solved by technology

The above experimental devices and methods are all used to study the mechanical properties of hydrates under static loads, but the disadvantage is that they cannot simulate the mechanical response characteristics of hydrate sediments under dynamic loads under natural conditions, and are limited to a single hydrate sediments mechanical properties. Performance testing, lack of methods to correlate the mechanical properties of hydrate deposits with other physical properties

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