Cheverda, V.; Bratchikov, D.; Gadylshin, K.; Golubeva, E.; Malakhova, V.; Reshetova, G. Subsea Methane Hydrates: Origin and Monitoring the Impacts of Global Warming. Appl. Sci.2022, 12, 11929.
Cheverda, V.; Bratchikov, D.; Gadylshin, K.; Golubeva, E.; Malakhova, V.; Reshetova, G. Subsea Methane Hydrates: Origin and Monitoring the Impacts of Global Warming. Appl. Sci. 2022, 12, 11929.
Cheverda, V.; Bratchikov, D.; Gadylshin, K.; Golubeva, E.; Malakhova, V.; Reshetova, G. Subsea Methane Hydrates: Origin and Monitoring the Impacts of Global Warming. Appl. Sci.2022, 12, 11929.
Cheverda, V.; Bratchikov, D.; Gadylshin, K.; Golubeva, E.; Malakhova, V.; Reshetova, G. Subsea Methane Hydrates: Origin and Monitoring the Impacts of Global Warming. Appl. Sci. 2022, 12, 11929.
Abstract
One of the possible mechanisms causing significant emissions of methane into the atmosphere within the Arctic shelf may be the decomposition of gas hydrates. Their accumulations within the Arctic shelf formed during Ice Age almost simultaneously with the formation of permafrost, which contributed to the emergence of a zone of stable existence of gas hydrates. The subsequent flooding of the Arctic shelf led to the degradation of the permafrost and the violation of the conditions for the existence of hydrates. To assess the state of the stability zone, methods of mathematical numerical modeling are used. Standard seismic methods are widely used to localize gas hydrates, but monitoring their physical state requires the development of fundamentally new approaches based on solving multiparameter inverse seismic problems. In particular, the degree of attenuation of seismic energy is one of the objective parameters for assessing the consolidation of gas hydrates: the closer they are to the beginning of decomposition, the higher the attenuation, and hence the lower the quality factor. Thus, the methods of seismic monitoring of the state of gas hydrates in order to predict the possibility of developing dangerous scenarios should be based on solving a multi-parameter inverse seismic problem. This publication is devoted to the presentation of this approach.
Keywords
viscoelasticity; seismic attenuation; generalized standard linear solid; multiparameter inverse problem; subsea permafrost; Arctic shelf; methane hydrate stability zone
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
