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Energies

Abstract : The potential of the seas and oceans is considerable in terms of energy. The traditional challenge was first of all to assess subsea hydrocarbon reserves to see whether these potential oil and gas deposits, proven or not, could be exploited under satisfactory technical and economic conditions. The new challenge today is to accelerate the energy transition by making more efficient use of all the resources highlighted by geographers, namely tides, currents, waves, differences in temperature, salinity and wind. These two issues should not be opposed but complement each other naturally since the planet's hydrocarbon reserves are, by definition, limited and extraction destroys them forever. Without getting into the peak oil debate, i.e. determining when the peak of the offshore oil and gas production curve will be reached, we can say that this production will peak and then start to decline, when the time comes, due to the depletion of exploitable reserves. Physical geography, through oceanography, geomorphology, climatology shows that seas and oceans are unequal in volume, mass, depth and characteristics. This obviously has an impact on the ease of access to underwater hydrocarbon resources and on the potential of marine renewable energies. For hydrocarbons, geology and geophysics will complete the first geographical analysis by evaluating the rock strata and studying the constituent elements of underwater rocks. For marine renewable energies, in most cases, a kinetic power will produce electricity, at depth or on the surface of seas and oceans, by an adequate device which is connected to the network to market the electrons thus generated. There are generally 6 types of electricity production, namely tidal energy, wave energy, current energy, thermal energy of the seas, osmotic energy and wind energy.
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Contributor : Louis Boisgibault <>
Submitted on : Thursday, November 19, 2020 - 5:25:00 PM
Last modification on : Thursday, May 13, 2021 - 6:29:50 PM
Long-term archiving on: : Saturday, February 20, 2021 - 8:31:14 PM

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Louis Boisgibault, Raymond Woessner. Energies. Géographie des mers et des océans, Atlande, 2014, 9782350302751. ⟨halshs-01121821⟩

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