Simulation system for in-situ detection of hydrate geochemical parameters in deep-sea sediments

Abstract

The invention belongs to the field of in-situ measurement technology and application of marine natural gas hydrate geochemical parameters. The in-situ detection and simulation system of hydrate geochemical parameters in deep sea sediments of the present invention includes a laser Raman spectrum detection system (I), a deep sea environment simulation system (II), a hydraulic system (III) and a real-time monitoring and processing system for parameters (IV ), the deep-sea environment simulation system (II) is electrically connected with the laser Raman spectroscopy detection system (I), and the parameter real-time monitoring and processing system (IV), respectively, and the hydraulic system (III) is set in the deep-sea environment simulation system (II). It eliminates the uncertainty caused by sampling and non-situ measurement; it is simple, real-time, and efficient; it can safely obtain high-fidelity information in the high-pressure simulation cabin. In addition, the device can also be used for laboratory simulation of hydrate production methods and its real-time monitoring.

Description

technical field [0001] The invention belongs to the field of in-situ measurement technology and application of marine natural gas hydrate geochemical parameters, and in particular relates to a simulation system for simulating a deep sea environment and detecting changes in geochemical parameters during the formation and decomposition of natural gas hydrate in sediments. Background technique [0002] The fluids and seepage hydrocarbons released during the formation or decomposition of seafloor hydrates will change some of the chemical properties of the overlying sediments, pore water, and bottom seawater. These abnormal geochemical responses can be used to indicate the presence of gas hydrates . [0003] Current research on the geochemical parameters of seafloor gas hydrates is generally limited to geological sampling of deep-sea sediments followed by laboratory analysis. However, due to the temperature and pressure conditions required for the stability of gas hydrates, it i...

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Problems solved by technology

However, due to the temperature and pressure conditions required for the stability of gas hydrates, even with fidelity sampling, it is difficult to ensure that the physical and chemical properties of gas hydrates do not change during the sampling process, resulting in a large detection rate in traditional sampling methods. error

[0004] In recent years, laser Raman spectroscopy has been successfully applied to the in-situ observation of seabed sediments. The relevant chemical parameter information can be obtained by focusing the Raman optical fiber on the seabed target through an underwater robot, but this method is expensive. , not universal

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