Pull-type cold spring plume three-dimensional detection device and detection method

Abstract

The invention relates to the technical field of natural gas hydrate detection, in particular to a pull-type cold spring plume three-dimensional detection device and a detection method. Comprising a frame, a methane sensor releasing mechanism and four water taking devices, the four water taking devices are symmetrically arranged at the bottom of the frame, and the methane sensor releasing mechanism is located at the bottom of the frame; the methane sensor releasing mechanism comprises a motor, a ball screw part, a sensor load rejection part and a methane sensor, the ball screw part comprises a lead screw and a nut, the nut is sleeved on the lead screw, and one end of the lead screw is connected with an output shaft of the motor through a coupler. The detection of the distribution range of the plume flow of the cold spring is realized, and the effective measurement of the methane concentration gradient in the horizontal and vertical directions is also realized.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate detection, in particular to a towed cold spring plume three-dimensional detection device and a detection method. Background technique [0002] Natural gas hydrate is a crystalline substance that is formed in a low temperature and high pressure environment. It is formed by the mixing and complexation of organic gases mainly composed of methane and water. Most of them occur in the form of solid state in seabed sediments or onshore permafrost areas. Cracks and pores in rocks. The submarine cold spring natural gas leakage system is a natural phenomenon widely distributed in the global marine environment, and has developed in almost all continental margins in the world. Cold spring research is of great significance in global climate change, extreme biological communities, ocean hypoxia, etc. The precipitation of seep-type gas hydrates is closely related to the activity of submarine cold sp...

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Problems solved by technology

[0004] Currently, methods for detecting cold seep plumes include ROV photography, sonar technology, and seismic exploration. Existing cold seep plume detection technologies are limited to the scale and distribution of the plume, and cannot effectively measure the plume methane concentration, leading to General effect

In addition, at this stage, some breakthroughs have been made in the detection technology of seepage gas flux of seabed cold seep, but most of them are limited to the measurement of seepage gas flow rate of cold seep vents, the detection range is limited, and the plume methane concentration gradient cannot be effectively detected.

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