What is marine geothermal energy


The phenomenon of climate change has served as a reminder that it is imperative that humanity aligns itself with nature and harnesses its power in a sustainable manner, while ensuring the preservation of ecosystems and the beings that inhabit them. Among the various forms of renewable energy, geothermal energy often goes unnoticed and undervalued. Scientists are winning in the improvement and research of the marine geothermal energy.

Therefore, in this article we are going to tell you what marine geothermal energy is, its characteristics and how it can help us combat climate change.

The immeasurable help that marine geothermal energy provides

marine energy source

Compagnie Générale de Géophysique-Veritas, a leading company in the field, recently published a statement on its official website. In this statement they have provided detailed information about the enormous potential of marine geothermal energy and its promising future. Through their extensive research, CGG scientists have made a groundbreaking discovery: the presence of an extraordinary source of energy beneath the ocean floor, characterized by active volcanic activity.

These energy-rich areas, known as tectonic wells, are scattered in different regions of the world and have immense potential for geothermal energy extraction. In addition, they can also be used to obtain drinking water and produce environmentally friendly green hydrogen. The study conducted by CGG goes beyond mere exploration, as the company proudly announces the successful patenting of a unique combination of technologies derived from various fields such as engineering, geology and geophysics.

This innovative approach not only allows for deeper investigations into these geothermal sources, but also facilitates their continuous monitoring and opens up interesting possibilities for their future utilization.

The importance of CGG

marine geothermal energy

CGG is confident in its ability to identify optimal ocean areas for the application of its technology. Additionally, CGG intends to collaborate with organizations to fully realize the untapped potential of ocean energy. Peter Whiting, representative of CGG, expresses his firm belief in the importance of geothermal energy as a fundamental resource in the future energy landscape.

Exploring marine geothermal energy resources presents a unique opportunity to contribute to the Sustainable Development Goals 2023 of the United Nations Development Programme. In particular, the Canary Islands in Spain are emerging as a leading competitor in the marine geothermal energy space, due to the volcanic nature of the archipelago. This information can be found in the post provided below.

Marine geothermal energy potential


The enormous potential of the sea as a source of energy is evident, especially considering that 40% of the population resides less than 100 kilometers from the coast, not only in France but throughout the world. The ENGIE Group, in addition to taking advantage of the power of the tides and currents, is a pioneer in a pioneering field in the energy sector: thermal energy from the sea. This innovative approach takes advantage of the temperature disparity between the warmest surface of the ocean and the coldest depths. While this marine geothermal system is already operational in Paris, using water from the Seine River, the Group is embarking on two unprecedented projects in Marseille and La Réunion, using seawater.

An innovative initiative has emerged in Marseille that takes advantage of the abundant renewable energy resources found in the Mediterranean Sea. Through a collaborative effort involving the public sector, the Euroméditerranée Development Agency, local and regional authorities, as well as private companies such as Constructa, Foncière des Régions and ENGIE, this project serves as an excellent example of how innovation drives the transition towards a sustainable economy and efficient energy solutions. Furthermore, it aligns perfectly with the overall vision of transforming Euroméditerranée into a sustainable model city.

Thassalia marine geothermal project

The Thassalia offshore geothermal project has been uniquely designed to meet the needs of the Euroméditerranée Eco-City business center in Marseille, recognized as the largest urban regeneration program in southern Europe. This is a pioneering effort as it is the first project of its kind to provide heating, water heating and air conditioning services on such a large scale using seawater. This remarkable feat comes with significant technical challenges, particularly in terms of corrosion prevention.

The Thassalia offshore geothermal power plant, located in the port of Marseille-Fos, It has the distinction of being the first facility of its kind not only in France but also in all of Europe. Its innovative approach is to harness the thermal energy of seawater to provide heating and cooling to several buildings in the city of Marseille. Spanning a vast space spanning approximately 500.000 square meters, this innovative project is poised to make a significant impact by curbing greenhouse gas emissions by an impressive 70% and reduce water consumption by an equally commendable 65%.

By taking advantage of contrasting ocean temperatures, marine geothermal energy takes advantage of warmer surface waters and cooler depths. Using 1 km long pipes, water is extracted from the sea and transported to coastal facilities. In these installations, heat exchangers and heat pumps are used to meet heating and cooling requirements. The heated or cooled water is then distributed to individual buildings using pumping mechanisms.

Efforts to harness the potential of marine thermal energy have gone through periods of progress and setbacks dating back to the late 19th century. However, these efforts have consistently faced obstacles preventing their success, including the challenge of extracting substantial amounts of cold water from the deep ocean and the requirement for a minimum temperature difference of 20 degrees. Consequently, the utilization of marine energy has remained confined to a specific geographic range found in the tropical and subtropical regions of Ecuador.

I hope that with this information you can learn more about what marine geothermal energy is and its characteristics.

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