Device and method for measuring bidirectional diffusion coefficient of shale gas under triaxial stress

• Main Authors: WU RUI, LUO LONG, XU SHANG, WANG HUAN, YANG FENG, NIE SIJIA, MENG QINGBANG
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to the field of shale physical property testing, and particularly provides a device and a method for measuring a bidirectional diffusion coefficient of shale gas under triaxial stress. The invention aims to solve the problem that the existing gas diffusion coefficient measuring device cannot truly simulate the process that gas in shale is subjected to bidirectional diffusion under the stress action in an underground environment, so that the credibility of an experimental result is low. A rock core cavity in the device is respectively connected with a true triaxial stress loading system, a gas diffusion system and a vacuumizing system through a pipe valve system, and the gas diffusion system diffuses gas to the rock core cavity along the horizontal direction and the vertical direction by utilizing the pipe valve system; then the core cavity, the true triaxial stress loading system, the gas diffusion system and the pipe valve system are all placed in a constant temperature system, so that