A high-pressure NMR co 2 Geological storage model test system

Abstract

The invention discloses a high-pressure nuclear magnetic resonance CO2 geological storage model test system. A load control system is connected with a sample visualization observation system through a pipeline. A fluid control system is connected with a core holding unit in the sample visualization observation system through a fluid injection pipeline. An axial pressure sensor and a confining pressure sensor in a data collecting and processing system are installed on a pipeline connecting an axial pressure pump in the load control system with the core holding unit and a pipeline connecting a confining pressure pump in the load control system with the core holding unit respectively. A left water pressure sensor and a right water pressure sensor in the data collecting and processing system are installed on a pipeline connecting a left salt water injection pump in the fluid control system with the core holding unit and a pipeline connecting a right salt water injection pump in the fluid control system with the core holding unit respectively. An injection air pressure sensor and a flow meter in the data collecting and processing system are installed on a pipeline connecting a CO2 injection pump in the fluid control system with the core holding unit. By means of the high-pressure nuclear magnetic resonance CO2 geological storage model test system, the transport law of CO2 in reservoirs and cap rock on the conditions of different temperatures, different vertical stresses and different horizontal stresses and the deformation and fracture law of the reservoirs and the cap rock are researched.

Description

Technical field [0001] The invention relates to a model test system, in particular to a high-pressure nuclear magnetic resonance CO 2 Geological storage model test system, which is suitable for simulating CO in real environment 2 The geological storage process is also used to study CO under different temperature and different initial stress conditions 2 The law of migration in the reservoir and caprock and the law of deformation and failure of the reservoir and caprock. Background technique [0002] CO 2 Geological storage technology is currently a very effective greenhouse gas control method. Large amount of CO 2 Injection into the formation will cause an increase in pore pressure, which will lead to a decrease in the effective stress of the rock mass. At the same time, the change of the effective stress will in turn affect the porosity, permeability and capillary pressure of the rock mass, which will affect the CO 2 The migration has an impact. In the process of seepage-mechani...

AI Technical Summary

Problems solved by technology

NMR technology in CO 2 The research on geological storage mainly focuses on the core-scale two-phase fluid displacement test, and there are few tests considering the mechanical influence, while there are no tests that simultaneously simulate the deformation, failure and seepage change of the reservoir and cap rock system.

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