The power under the ocean
Japan is known to be a country with few natural energy resources. Her current energy self-sufficiency rate is only 4%, although it is normally closer to 20% if nuclear power stations, currently almost all off-line, are included. Japan depends on oil for more than 50% of the energy supply, importing about 90% of it from the Middle East with all the political and security risks to stability of supply involved. Under these circumstances, Japan has been expanding her horizons in the search for sources of energy. Through marine research, the seabed around Japan has started to show the first glimmers of being an unopened treasure chest of potential energy. Methane hydrate, otherwise known as ‘Burning Ice’, is the only energy resource mined in Japan apart from coal. Experimental drilling off the Atumi peninsula ran from February to March this year as part of a national research project. According to the published results, the volume of methane hydrate deposits is estimated to be the equivalent 90 to 100 years of Japan’s natural gas consumption. There are substantial reserves of methane hydrate between 100 to 300 meters from the seabed in the sea off Niigata and around the East Nankai Trough. Developing this field would be the world’s first trial of offshore production of methane hydrate. Japan Oil, Gas and Metals National Corporation (JOGMEC) research organisation under the Ministry of Economy, Trade and Industry has led this project, supported by the deep-sea scientific drilling vessel ‘Chikyu’, operated by Japan Agency for Marine-Earth Science and Technology (JAMSTEC) under Ministry of Education, Culture, Sports, Science and Technology. There are still a lot of issues to be resolved before industrial production can begin, such reduction of mining costs, but the Government has high expectations. The Chikyu research vessel has made a number of other significant […]