|
|
|
|
|
| Colin, Florent; Ker, Stephan; Riboulot, Vincent; Sultan, Nabil. |
| Gas hydrate (GH) systems constitute methane sinks sensitive to environmental changes such as pressure, temperature, and salinity. It remains a matter of debate as to whether the large GH system of the Black Sea has reached a steady state since the last glacial maximum (LGM). We report on an irregular free gas distribution in specific sediment layers marking an irregular bottom‐simulating reflector (BSR). This anomalous free gas distribution revealed by very high resolution seismic images, acquired by a deep‐towed multichannel seismic system, might be evidence of an on‐going migration of the base of the GH stability zone (GHSZ). We show that the reequilibrium is not occurring homogeneously as overpressure from hydrate dissociation slows their decomposition... |
| Tipo: Text |
Palavras-chave: Hydrates; Seismic; Very high resolution; Dissociation; Black Sea. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00652/76430/77526.pdf |
| |
|
| |
|
|
| Sultan, Nabil. |
| While it is well accepted that gas hydrate dissociation at the base of the Gas Hydrate Stability Zone (GHSZ) can generate high excess pore pressure and leads to sediment deformation, the consequence in terms of pore pressure of the dissolution of the gas hydrate at the top of the Gas Hydrate Occurrence Zone (GHOZ) remains neglected. The purpose of this comment on Xu and Germanovich [2006] article is to demonstrate that gas hydrate dissolution in the GHSZ may generate excess pore pressure and to point out the risk related to hydrate dissolution at the top of the GHOZ. |
| Tipo: Text |
Palavras-chave: Pore pressure; Hydrate; Dissolution; Dissociation. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2318.pdf |
| |
|
|
|
