Method and system for analyzing carbon circulation process at boundary of natural gas hydrate stabilization zone

A hydrate and boundary technology, applied in analytical materials, measurement devices, instruments, etc., to solve problems such as difficult recovery and reconstruction

Active Publication Date: 2019-11-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0009] The carbon cycle process that occurs at the boundary of the gas hydrate stable zone is a dynamic process, and the bottom boundary of the hydrate stable zone migrates vertically with geological processes, such

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  • Method and system for analyzing carbon circulation process at boundary of natural gas hydrate stabilization zone
  • Method and system for analyzing carbon circulation process at boundary of natural gas hydrate stabilization zone

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[0055] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] The current hydrate research rarely involves the role of the gas hydrate system in the global carbon cycle system, and only a few studies qualitatively and roughly describe the vertical migration process between the hydrate layer and the underlying The hydrate cycle between free gas zones (Free Gas Zone: FGZ) belongs to the carbon cycle in the lithosphere, and there is no research on the carbon cycle process at the boundary of the hydrate stable zone.

[0057] Aiming at the problems existing in the prior art, the present invention provides a method for analyzing the carbon cycle process at the boundary of the gas hyd...

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Abstract

The invention belongs to the technical field of natural gas hydrate carbon circulation, and discloses a method and a system for analyzing a carbon circulation process at a boundary of a natural gas hydrate stabilization zone. On the basis of methods for seismic interpretation, numerical simulation, hydrate decomposition amount calculation, coral reef fixed carbon content calculation and the like,the carbon circulation process at the boundary of the hydrate stabilization zone is quantitatively evaluated. The amount of methane entering seawater is estimated by calculating the amount of free gasreleased by hydrate decomposition and the fixed carbon content of cold-water coral reefs, so that the carbon circulation process in lithosphere, biosphere, hydrosphere and atmosphere at the boundaryof the hydrate stabilization zone is fully recognized, the effect of a natural gas hydrate system in a global carbon circulation system is quantitatively and accurately evaluated, and people is helpedto correctly understand the influence of hydrates on the environment, the climate changes and the like.

Description

technical field [0001] The invention belongs to the technical field of natural gas hydrate carbon cycle, and in particular relates to a method and system for analyzing the carbon cycle process at the boundary of a natural gas hydrate stable zone. Background technique [0002] Currently, the closest prior art: [0003] Gas hydrates store a large amount of methane and other hydrocarbon gases, and their estimated geological reserves exceed the sum of known land natural gas geological reserves in the world. The gas hydrate in the sea area is located in the shallow layer of the sediment. Affected by ocean currents, sedimentation, diapirism, etc., the gas hydrate stable bottom boundary (Base of Gas Hydrate Stability Zone: BHSZ) is prone to vertical migration, resulting in the decomposition of gas hydrate. It is generally believed that the gas hydrate stability zone GHSZ on the submarine slope is a wedge-shaped body that thickens toward the sea. The landward limit of Gas Hydrate ...

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Application Information

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IPC IPC(8): G01N33/22
CPCG01N33/225G01N33/222
Inventor 杨金秀齐宁卢双舫王民卢明月宋朋霖
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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