Device and method for simulating generation of gas hydrate and measuring physical property parameters thereof

Abstract

The invention relates to a device and a method for simulating generation of a gas hydrate and measuring physical property parameters thereof. The device is characterized by comprising a high-pressure reactor which is respectively connected with a high-pressure gas distribution system, a temperature measuring system, a pressure measuring system and an ultrasonic sound velocity measuring system, wherein the high-pressure reactor is arranged in a cold bath tank connected with a refrigeration compressor; a handle slide rod is slidingly inserted at the top of the high-pressure reactor; the ultrasonic sound velocity measuring system comprises two ultrasound probes respectively arranged at the bottom of the handle slide rod and the bottom in the high-pressure reactor, and the two ultrasound probes are respectively connected with an acoustoelectric transducer; one acoustoelectric transducer is connected with the transmitting end of an ultrasonic signal transmitter-receiver through a lead, while the other acoustoelectric transducer is connected with the receiving end of the ultrasonic signal transmitter-receiver through a lead; the ultrasonic signal transmitter-receiver is connected with an oscilloscope, and the output end of the oscilloscope is connected with a computer acquisition system; and a gas hydrate sound wave acquisition and analysis module is preset in the computer acquisition system.

Description

technical field [0001] The invention relates to a measuring device and method, in particular to a device and method for simulating the formation of natural gas hydrate and measuring its physical parameters. Background technique [0002] Gas hydrates are widely distributed in the slopes of continental islands, uplifts of active and passive continental margins, very low continental shelf oceans and deep water environments, etc. Gas hydrate per cubic meter can store 160~180m 3 Natural gas is known as an important follow-up energy source in the 21st century. As a kind of energy resource, the exploration and development of gas hydrate has been highly valued by governments and research institutions all over the world, and the research on gas hydrate has also become a research hotspot in recent years. Understanding the amount of natural gas hydrate resources and their basic distribution characteristics in the formation has important guiding significance for the exploration and de...

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Problems solved by technology

However, at present, there are relatively few experimental devices using the above method for measurement.

Among them: the experimental device GHASTLI of the US Geological Survey has many detection methods, including ultrasonic detection technology, but it can only be used for core samples and cannot be used in loose sediments; the experimental device of Qingdao Institute of Marine Geology is equipped with ultrasonic detection technology , and has a light transmission rate detection system, but the light transmission rate detection system cannot be used for the detection of hydrates in sediments; It is 1000V, and the pulse frequency is 2MPa. Its voltage and pulse frequency are relatively high, which is quite different from the pulse frequency of seismic logging. Although the sound velocity of hydrate in the sediment can be measured, the hydrate distribution in the synthetic sediment sample is uniform. gender unknown

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