Mechanical and acoustic characterization of carbon dioxide gas replacement of methane gas hydrate
Year: 2024
Type: article
Abstract: CO 2 replacement presents a promising approach for the extraction of natural gas hydrate , offering advantages in cleanliness and safety. In this study, CO 2 replacement CH 4 hydrate experiments were carried out by using the triaxial, hydrate specimens with varying replacement ratios were prepared through different methods, and triaxial tests were performed to evaluate the mechanical properties of sediments after replacement. The key findings are as follows: the shear damage behaviors of CH 4 , CO 2 , and their mixed hydrate specimens are similar. Acoustic data indicates that initial CO 2 injection during replacement causes dissociation of CH 4 hydrate, potentially reducing the failure strength of the reservoir. However, post-replacement hydrate specimens exhibited higher failure strength than their original counterparts. This study provides valuable insights into the mechanical stability of CH 4 hydrate reservoirs during CO 2 replacement process.
Source: Gas Science and Engineering
Authors: Tao Liu, Peng Wu, Lei Huang, Yanghui Li, Yongchen Song
Institution: Dalian University of Technology
Language: English
Subfield: Environmental Chemistry
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,450
OpenAlex ID: W4402526095