Experimental Device and Method for Evaluating Fault Instability Induced by Carbon Dioxide Geological Sequestration
By designing a multi-system comprehensive monitoring experimental device, the problem of being unable to simulate high-temperature environment and fault distribution in the prior art is solved, and accurate monitoring and instability analysis of fault stability during carbon dioxide injection is achieved.
Patent Information
- Application Number
- CN202310284572.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-22
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2043-03-22
AI Technical Summary
The existing physical simulation experimental device for carbon dioxide storage cannot simulate the high temperature environment and fault distribution of deep reservoirs, cannot monitor the fault mechanical behavior during carbon dioxide injection, and it is difficult to accurately evaluate fault stability.
An experimental device including a true three-axis stress loading system, a liquid carbon dioxide injection system, a temperature loading system, an acoustic emission monitoring system, a gas concentration monitoring system, a stress and deformation monitoring system, a temperature monitoring system, and a fluid pressure monitoring system were designed to simulate the instability slip of geological faults during carbon dioxide injection.
Accurate monitoring of fault stability is achieved, dynamic data such as acoustic emission rupture signals on fault surfaces, Coulomb stress, leaked gas concentration and fluid pressure are obtained through various monitoring systems, and the fault instability mechanism during carbon dioxide injection is analyzed.