A method for mining natural gas hydrate
A mining method and hydrate technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of large heat loss and high cost, and achieve the effects of reducing heat loss, saving heating energy, and saving costs
Active Publication Date: 2021-10-15
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to provide a natural gas hydrate mining method in view of the problem of high heat energy loss and high cost caused by the current natural gas hydrate thermal shock method
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[0018] Below in conjunction with accompanying drawing, the present invention is described in detail.
[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] A natural gas hydrate mining method, mainly used for shallow natural gas hydrate mining, the mining device used includes a natural gas collection tank 1, a first mining ship 2, a gas-liquid separation device 3, a sealing rubber ring 4, a sealing telescopic sleeve 5, Delivery pipeline 6, first riser 7, first packer 8, natural gas hydrate production well 9, downhole separator 10, suction device 11, suction pipeline 12, backfill pipeline 13, first water pipe 14, water pump 15 , seawater purif...
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The invention relates to the technical field of shallow seabed natural gas hydrate exploitation, in particular to a natural gas hydrate exploitation method, in which water injection wells and production wells are set up in the sea, and the water injection wells are used to heat the hydrate layer, and the water surface is heated through the first water pipe. The water injection well and the production well are connected on the upper side, so that the water discharged from the production well enters the water injection well, and the production well and the water injection well are connected through the first pipeline, so that the hot water separated from the production well is injected into the water injection well again, so that part of the hot water forms heat. Circulation, that is, the low-temperature water that first entered the water injection well is heated and injected into the hydrate layer, and the hydrate layer is heated to make the temperature of the mixture collected by the production well high, and the water separated from the mixture is injected into the hydrate layer again, so that Partial heating energy is saved, heat loss is reduced, and cost is saved.
Description
technical field [0001] The invention relates to the technical field of seabed shallow natural gas hydrate exploitation, in particular to a natural gas hydrate exploitation method. Background technique [0002] Natural gas hydrate, commonly known as "combustible ice", is a crystalline substance formed by natural gas and water under high-pressure and low-temperature environments. The content of methane in natural gas hydrate is extremely high, and it has the characteristics of large heat production during combustion, low pollution, and fossil deposits. Twice the energy and other advantages. It has broad development prospects and is one of the important clean energy in the future development. [0003] Gas hydrates in my country mainly exist in permafrost and the seabed, and the reserves of seabed gas hydrates far exceed those in land permafrost areas. Therefore, how to properly develop seabed gas hydrates has important strategic significance. Current research shows that my co...
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IPC IPC(8): E21B43/01E21B43/20E21B43/24
CPCE21B43/01E21B43/20E21B43/24E21B41/0099
Inventor 胡刚谭川东王国荣王燕飞徐召强左润东方潘
Owner SOUTHWEST PETROLEUM UNIV