Scientists from Japan and Canada decided to cooperate and use the “decompression†method to explore the hundreds of millions of tons of “energy crystals†found in the waters near Honshu Island—natural gas hydrates (also known as “flammable iceâ€). This plan has now been approved by the Japanese government and all preparations will be completed in early 2008. However, at present, the development of these undisclosed resources will face many risks, of which the most critical is environmental risks.
On the coast of Honshu Island, 30 miles away, scientists have discovered a staggering trench: the methane in the trench is crystal-like, about 500 meters thick and totaling 40 trillion cubic meters. Japan believes that if these resources can be used by Japan, it will greatly improve its reliance on the difficulties of importing energy from the Middle East and Indonesia. According to preliminary estimates, these “combustible ice cubes†can be used for 14 years in Japan.
Internationally, Canada is at the leading edge in exploiting combustible ice. They usually use the "buck-boost" method to exploit this type of frozen resource by first drilling many deep holes in the ice, and then relying on a large number of pumps to reduce the pressure caused by the holes, so that useful methane gas can be removed from the sea water. Separated and slowly floated to the depth of human extraction.
Despite the attractive resources, mining still faces many unknown threats. For example, in the third step of the “depressurization†method, bucks allow large amounts of methane gas to slowly float to the surface of Shanghai. It is still unknown what kind of greenhouse gases will affect the global temperature. In addition, mining activities may cause seafloor trenches to collapse or be similar to mudslide disasters, which will not only bring huge losses to the miners, but also lead to the impact of the leakage of large amounts of greenhouse gases on the global environment. Moreover, large-scale drilling and laying of various equipment on the seabed will undoubtedly keep fish far from the coast, which will seriously affect the production and living of fishermen on the coast.
On the coast of Honshu Island, 30 miles away, scientists have discovered a staggering trench: the methane in the trench is crystal-like, about 500 meters thick and totaling 40 trillion cubic meters. Japan believes that if these resources can be used by Japan, it will greatly improve its reliance on the difficulties of importing energy from the Middle East and Indonesia. According to preliminary estimates, these “combustible ice cubes†can be used for 14 years in Japan.
Internationally, Canada is at the leading edge in exploiting combustible ice. They usually use the "buck-boost" method to exploit this type of frozen resource by first drilling many deep holes in the ice, and then relying on a large number of pumps to reduce the pressure caused by the holes, so that useful methane gas can be removed from the sea water. Separated and slowly floated to the depth of human extraction.
Despite the attractive resources, mining still faces many unknown threats. For example, in the third step of the “depressurization†method, bucks allow large amounts of methane gas to slowly float to the surface of Shanghai. It is still unknown what kind of greenhouse gases will affect the global temperature. In addition, mining activities may cause seafloor trenches to collapse or be similar to mudslide disasters, which will not only bring huge losses to the miners, but also lead to the impact of the leakage of large amounts of greenhouse gases on the global environment. Moreover, large-scale drilling and laying of various equipment on the seabed will undoubtedly keep fish far from the coast, which will seriously affect the production and living of fishermen on the coast.
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