Method for exploiting natural gas hydrates and device thereof
A technology for hydrate and natural gas, which is applied in mining minerals, mining fluids, and earth drilling, etc. It can solve the problems of increased mining costs, slow replacement reaction speed, and complex mining equipment, and achieve energy saving in transportation and fast decomposition. Effect
Active Publication Date: 2010-02-03
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF17 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
U.S. Patent US6994159B2 and Japanese Patent JP09158662 proposed to inject thermal fluids such as hot water and steam into natural gas hydrate reservoirs through production wells to promote the decomposition of natural gas hydrates. Large heat loss and low utilization rate of heat energy
Chinese patent CN1609409A proposes a method and device for exploiting natural gas hydrate by using microwave heating, and U.S. patent US6148911 proposes the exploitation of natural gas hydrate by underground electric heating, but these methods require electric heating, high energy consumption costs, and complicated mining devices
Chinese patent CN1779191A discloses a method of heating seawater by using a seabed heat pump, and then thermally decomposing and exploiting natural gas hydrate. Install compressors, condensers, evaporators and other equipment in an underwater high-pressure environment, and the equipment installation, operation and sealing technology are difficult
But CO 2 The problem with the displacement method is that the CO formed 2 Hydrate solids tend to wrap on the outer surface of methane hydrate, which leads to incomplete decomposition of gas hydrate, extremely slow replacement reaction, and a large amount of CO 2 Gas separation and transportation costs will also increase the cost of extraction
[0010] So far, there is no economical and effective method for large-scale industrial production of gas hydrates
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach
[0056] as attached figure 1 , 2 As shown, first, on the seabed rock layer 2, a hydrate production well 37, a gas gathering well 5, and a horizontal well 36 connecting the production well 37 and the gas hydrate reservoir 5 are constructed on the seabed rock layer 2, The horizontal well 36 is located in the natural gas hydrate reservoir 3, the sand filter device 4 is installed in the gas gathering well, and the seawater concentration heating device 1, the hot brine delivery pump 39, and the gas-liquid mixer 31 are installed at a certain depth in the seawater layer 7 to float on the sea A gas-liquid separator 13, a natural gas compressor 14, a natural gas storage tank 16, a seawater concentration heating device feedwater pump 15, a hydrate formation recovery pump 18, a hydrate formation separator 20, and a seawater heater inlet pump are installed on the platform 26 19. Hydrate forming gas compressor 21, hydrate forming product storage tank 22, centrifugal pump 23, fresh water st...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for developing natural gas hydrate, which comprises that building developing well, horizontal well and collecting well, building floating platform and natural gas hydrate developer on sea, building sea concentration heater, preparing hot salt water, decomposing natural gas hydrate and collecting natural gas. And the inventive device comprises a sea floating platform, a developing well, a collecting well, a horizontal well, a hydrate recycling system, a fresh water groove, a hot salt water tube, a hot salt water pump, and a seawater concentrating heater. The invention has simple process, low energy consumption and low cost, without pollution.
Description
technical field [0001] The invention belongs to the field of energy technology, and relates to a natural gas hydrate exploitation technology, in particular to a method and device for exploiting marine natural gas hydrate. Background technique [0002] Natural Gas Hydrate (Natural Gas Hydrate, referred to as Gas Hydrate) is a non-stoichiometric, ice-like, cage-type crystalline compound formed by low-molecular-weight hydrocarbons in water and natural gas under low temperature and high pressure conditions. Natural gas hydrate has the characteristics of a host-guest material. Water molecules (host) form a spatial lattice structure through hydrogen bonding, and gas molecules (guests) fill the cavities between the water molecule lattices through van der Waals forces with water molecules. . The natural gas hydrates are mainly methane hydrates, most of which occur in the seabed, which have the advantages of large reserves, wide distribution, shallow burial, high energy density, and...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21C50/00E21B43/24
CPCE21B2043/0115E21B41/0099
Inventor 陈朝阳李小森颜克凤李刚
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI