Imaging Arctic Permafrost: Modeling for Choice of Geophysical Methods
نویسندگان
چکیده
Knowledge of permafrost structure, with accumulations free natural gas and hydrates, is indispensable for coping spontaneous emission other problems related to exploration production drilling in Arctic petroleum provinces. The existing geophysical methods have different potentialities imaging the base geometry, vertical fluid conduits (permeable zones), taliks, pockets, hydrate continental areas. synthesis data on cryological geological conditions was basis a geophysical–geological model northern West Siberia depth 400 m, which includes modern permafrost, lenses relict hypothetical permeable zone that may be path migration gas–water fluids. used synthetic seismic, electrical resistivity tomography (ERT), transient electromagnetic (TEM) data, thus testing advantages drawbacks three methods. Electrical has insufficient penetration resolve all features can run only summer season. Seismic surveys limitations mapping conduits, though they image horizontally layered structure any Shallow (sTEM) soundings type included into work year round. Thus, best strategy use TEM as main method, combined seismic ERT data. Each specific method chosen proceeding from economic viability feasibility physiographic mountain river systems.
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ژورنال
عنوان ژورنال: Geosciences
سال: 2022
ISSN: ['2076-3263']
DOI: https://doi.org/10.3390/geosciences12100389