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Marine EM techniques for gas-hydrate detection and hazard mitigation

Scripps Institution of Oceanography, USA

Corresponding author: kweiteme{at}ucsd.edu

Marine controlled-source electromagnetic (CSEM) sounding is a new tool available to geophysicists for offshore hydrocarbon exploration. Although the technique has been developed for the detection of deep hydrocarbon reservoirs with relatively high resistivities, it also has the potential to be a useful tool for geohazard mitigation via gas hydrate detection. The hydrate target occurs in the shallow section (hundreds of meters in depth), and is manifested by subtle resistivity contrasts (a few -m). This requires modifications to the CSEM technique to extend its capability of imaging the shallower hydrate section.

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				R. L. Kleinberg Exploration strategy for economically significant accumulations of marine gas hydrate Geological Society, London, Special Publications, January 1, 2009; 319(1): 21 - 28. [Abstract] [Full Text] [PDF]