Continuous high pressure oxidation experimental device and method for natural gas hydrate gas release

Abstract

The invention belongs to the technical field of petroleum and gas and ecological environments, and particularly relates to a continuous high pressure oxidation experimental device and method for simulating natural gas hydrate gas release in the seabed environment. The device mainly comprises a generation-decomposition unit, a gas continuous high pressure oxidation unit and a data acquisition and processing unit. The generation-decomposition unit and the gas continuous high pressure oxidation unit are connected through a gas mass flow meter and a precise pressure regulating valve. The gas continuous high pressure oxidation unit comprises a solid system, a liquid system, a constant-temperature water bath tank and a vacuumizing system. The solid system comprises a plurality of reaction cylinders. The top of each front reaction cylinder is connected with the bottom of the corresponding rear reaction cylinder. The liquid system comprises a liquid storage tank, a stirring tank, a constant-flux pump and a reaction tank. By means of the experimental device and method, natural gas hydrate can be decomposed to release gas under different experimental conditions so that anaerobic / aerobic oxidation effects in bottom sediments or seawater can be achieved.

Description

technical field [0001] The invention belongs to the technical fields of petroleum and natural gas and ecological environment, and in particular relates to a continuous high-pressure oxidation experimental device and method for simulating gas released from natural gas hydrate in a seabed environment. Background technique [0002] As an important energy source in the 21st century, natural gas hydrate has been widely recognized and highly concerned. At the same time, as the largest carrier of the greenhouse gas methane, natural gas hydrate is a potential climate change factor, and its decomposition and release of gas may cause a series of negative environmental effects, such as the intensification of the greenhouse effect, changes in the marine ecological environment and Submarine landslides, etc. When the seabed gas hydrate decomposes, the released gas can undergo strong aerobic and anaerobic oxidation in the overlying sediment and seawater layer, weakening the flux that migr...

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Problems solved by technology

[0004] At present, domestic and foreign experimental studies on the anaerobic / aerobic oxidation of hydrocarbon gases in seabed sediments are mostly based on the static oxidation process, and the research objects are single or mixed light hydrocarbon gases. The dynamic decomposition process of natural gas hydrate has not been seen. Synergistic research linked to a continuous high-pressure oxidation process that releases gas

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