In-situ planting and collecting system and method of natural gas hydrate in sea area
A collection method and collection system technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problem of untargeted supply of methane gas, etc., to achieve mitigation of greenhouse gas effects, pollution-free development, and reduction of escape effect
Active Publication Date: 2020-01-03
QINGDAO INST OF MARINE GEOLOGY
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[0007] The above two comparative literatures concentratedly reflect the deep sea area, liquid or solid form, and in-situ planting and collection technology of metal sulfides, which disclose the collection process of hydrothermal metal minerals, which are stable substances. It does not involve the metastable phenomenon of gas-liquid mixing and solid-state transformation unique to natural gas hydrate, so it does not specifically provide technical solutions for how to form solid hydrate, transfer storage and reduce methane gas escape. Such problems are precisely the problems that must be faced and overcome in the process of gas hydrate acquisition in sea areas.
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Embodiment 1
[0040] Example 1, such as figure 1 As shown, this application is aimed at hydrate-driven cold seep. When it is determined that there are good hydrate resources and obvious cold seep leakage channels in the hydrate area, the cold seep fluid is first collected on the seabed, then planted in situ, and finally collected.
[0041] The in-situ planting and collection system of natural gas hydrate in the sea area includes a cold spring reaming and product collection unit, a cold spring gas collection planting unit and a subsea engineering auxiliary unit. in,
[0042] Cold spring reaming and product collection unit, including engineering ship or drilling platform 1, drilling device 11 and hoisting system 12;
[0043] The cold spring gas collection planting unit includes a solid gas collection device 2 and a hole expansion diversion system 4;
[0044] The solid gas collection device 2 includes a pressure-reducing gas delivery valve 21 arranged on the top of the device, a pressure sen...
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The invention provides an in-situ planting and collecting system and method of natural gas hydrate in a sea area. The in-situ planting and collecting system and method of the natural gas hydrate in the sea area are used for carrying out in-situ well reaming, and intercepting and planting the natural gas hydrate to carry out subsequent collection. In order to accelerate the collection speed and improve the collection efficiency of plume gas in a leakage area, and storage and transfer of solid hydrate are carried out under the premise of forming the solid hydrate in situ, so that the low energyconsumption and pollution-free development of the natural gas hydrate collecting operation in the sea area are realized, the seawater oxygen lack and acidification degree is alleviated, and the greenhouse gas emission effect is relieved. The in-situ planting and collecting system of the natural gas hydrate in the sea area comprises a cold spring reaming and finished product collecting unit, a coldspring gas collecting planting unit and a submarine engineering auxiliary unit, wherein the cold spring reaming and finished product collecting unit comprises an engineering ship or a drilling platform, a drilling device and a hoisting system; the cold spring gas collecting planting unit comprises a solid-gas collecting device and a reaming diversion system; and the submarine engineering auxiliary unit comprises an engineering crawling car connected with the engineering ship or the drilling platform through a crawling car umbilical cable.
Description
technical field [0001] The invention relates to an in-situ planting and collection system and method for shallow surface natural gas hydrate in sea areas under natural conditions (expressed as seabed cold springs or fluid leakage), and belongs to the technical field of marine resources development engineering. Background technique [0002] As a new, efficient and environmentally friendly energy source, natural gas hydrate is widely distributed around the world. The total amount of global resource-level hydrate is conservatively estimated to be about n×10 15 m 3 (several quadrillion cubic meters), it is regarded by various countries as the most promising alternative energy source for oil and gas in the future. [0003] Natural gas hydrate is a naturally occurring crystalline compound composed of methane-based hydrocarbon gas and water molecules, usually in the form of ice and snow, chemically belonging to "cage inclusions", usually formed and stored at low temperature (0 -1...
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Login to View More IPC IPC(8): E21B43/01E21B43/12
CPCE21B43/01E21B43/12
Inventor 孙治雷吴能友张喜林曹红耿威王利波翟滨张现荣徐翠玲
Owner QINGDAO INST OF MARINE GEOLOGY