Method and device for exploring seabed gas hydrate

Abstract

The invention provides a mining method of undersea natural gas hydrates and a device thereof. The undersea natural gas hydrates are mined by utilizing renewable energy sources, abundant solar energy in marine areas is collected and transformed into electric energy which is transformed into heat energy for heating a stratum containing the natural gas hydrates which is a certain depth from a submarine stratum so as to lead the hydrates therein to be decomposed, and the natural gas generated from decomposing is collected. The device comprises a solar power generating system arranged on a sea production platform and a distributor comprising an electric heater, wherein, the solar power generating system is connected with the electric heater by an insulated cable so as to supply power for the electric heater. The method has the advantages of high efficiency, low energy consumption, strong feasibility, and safety and environmental protection; in addition, the device is simple and the cost is lower.

Description

Technical field [0001] The invention relates to a seabed natural gas hydrate exploitation method and device, belonging to the field of natural gas exploitation. Background technique [0002] Since the large-scale occurrence of natural gas hydrate was first discovered in nature, many countries have set their sights on this potential new energy source with high energy density, huge reserves, clean and environmentally friendly future. After entering the 21st century, with the intensification of energy shortage and the high price of oil and gas, the world has accelerated the pace of development and utilization of natural gas hydrate. Many developed countries such as the United States, Japan, Germany, Canada and other countries have invested heavily in theoretical and technical research related to hydrate mining. The United States has formulated a mid- and long-term plan for methane hydrate research and development. It is expected to conduct commercial trial mining in 2015, and ...

AI Technical Summary

Problems solved by technology

The chemical reagent method is expensive, pollutes the environment, and the formation pressure of the seabed hydrate is relatively high, so this method is not suitable

Therefore, it is best to combine the above three methods, such as combining the depressurization method and the thermal shock method, but energy consumption, cost and pollution are still the difficult problems that they have to face in commercial large-scale mining applications

Although the bottom hole combustion method has high thermal efficiency, it requires pure oxygen, and there are safety and cost issues

Some scholars have also proposed the sea surface decomposition method, where the hydrate-containing formation sediments are mined to the ground together and then decomposed, but this aspect is only suitable for hydrate mining on the seabed surface, and this method requires large-volume containers to ensure high daily gas production.

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