Method and system for evaluating leakage risk in carbon dioxide geological sequestration body

Abstract

The invention discloses a leakage risk evaluation method and system in a carbon dioxide geological sequestration body. The method comprises the steps of obtaining changes of sequestration condition parameters of a carbon dioxide sequestration layer and storing the changes of the sequestration condition parameters according to a time sequence; detecting whether the carbon dioxide in the sealing layer leaks or not; under the condition that the detection result is that leakage occurs, acquiring a time point when the leakage of the carbon dioxide occurs; the change of the sealing condition parameters in a preset time period before the time point is obtained, the change of the sealing condition parameters in the preset time period is associated with the detected leakage, the associated data are stored, and the associated data serve as a basis for predicting whether leakage will occur or not according to the change of the sealing condition parameters. According to the invention, the problem that leakage is not estimated according to the change of the storage environment in the prior art is solved, so that the possibility of carbon dioxide leakage can be estimated in advance, and the safety of carbon dioxide storage is improved.

Description

technical field [0001] This application relates to the field of geological storage of carbon dioxide, in particular, to a method and system for evaluating the risk of leakage in a carbon dioxide geological storage body. Background technique [0002] Carbon dioxide hydrate is a relatively special envelope compound formed by water and most gases under low temperature and high pressure conditions. In carbon dioxide hydrate, water molecules form the main crystal network with the help of strong hydrogen bonds, and the pores in the network are filled with gas molecules (called guest molecules), and the degree of filling of the pores depends on the temperature, pressure and excess of the system. coldness. There is no stoichiometric relationship between the host and guest molecules, and the force between the molecules is van der Waals force. At present, the research hotspots on carbon dioxide hydrate are concentrated in the fields of natural gas hydrate exploitation, gas storage a...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a leakage risk assessment method and system in a carbon dioxide geological storage body, to at least solve the problems in the prior art caused by not estimating the leakage according to the change of the storage environment

Images