Which country holds the record for the production of methane gas from the gas hydrates of the sea floor by depressurization for longest duration?

Which country holds the record for the production of methane gas from the gas hydrates of the sea floor by depressurization for longest duration?

Through a well in the Nankai Trough, an ocean basin 80 kilometres off the coast of Japan, Japanese researchers retrieved methane up to the surface over a period of one week from a water depth of 1000 metres. The gas hydrate was dissociated through depressurization.

Where are methane hydrates produced?

Methane hydrates will form when the temperature and pressure allow (Fig. 2.3). In nature, they are found almost exclusively in permafrost on land or in deep ocean sediments.

How are gas hydrates produced?

Gas hydrate forms when methane and water combine at pressure and temperature conditions that are common in the marine sediments of Earth’s continental margins and below about 200 m depth in permafrost areas. Just because gas hydrate is stable at a particular location does not mean that it actually occurs there.

Why does methane hydrate decompose when extracted?

In this method, a well is drilled to the methane hydrate-bearing layer, and methane hydrate is dissociated by heating using a fluid (hot water or steam) heated at the surface in a boiler or similar device and circulated down through the well. This causes methane hydrate to decompose and generates methane gas.

How is methane hydrates produced?

Methane hydrate is formed when hydrogen-bonded water and methane gas come into contact at high pressures and low temperatures in oceans.

Is methane hydrate natural gas?

Natural gas hydrates are an ice-like solid composed of water and gas, most commonly methane. Natural gas hydrates are an ice-like solid composed of water and gas, most commonly methane.

How are methane hydrates formed?

Is methane hydrate a gas?

Gas hydrates consist of molecules of natural gas (the chief constituent of natural gas; methane) enclosed within a solid lattice of water molecules.

How are oceanic gas hydrates produced?

Gas hydrate forms when methane and water combine at pressure and temperature conditions that are common in the marine sediments of Earth’s continental margins and below about 200 m depth in permafrost areas.

Are methane hydrates difficult to extract?

Methane hydrates are simply too sensitive to pressure and temperature to simply dig up and haul to land. They form at typically several hundred metres beneath the seafloor at water depths of about 500 metres, where pressures are much higher than at the surface, and temperatures are close to 0C.

What is the largest source of methane?

Methanogens (methane-producing bacteria in swamps and wetlands) are the largest natural source. Anthropogenic sources of methane include leaks during fossil fuel mining, rice agriculture, raising livestock (cattle and sheep), and municipal landfills.

What is methane hydrate used for?

Commercial research on the uses of methane hydrate focuses on extracting natural gas from the crystal structure. Methane hydrate may also be formed during the production of natural gas when water condenses with high pressures of methane gas.

How is methane hydrate formed?

Methane hydrate is thought to be formed by dead organic matter trapped between the earth’s layers, and then broken down by microorganisms and the earth’s heat.