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Rapid Thermal Initiation Production Method of Natural Gas Hydrate

A mining method and technology of natural gas, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of restricting the commercial development and utilization of natural gas hydrate, and achieve low loss, high heat, and rich aluminum materials Effect

Active Publication Date: 2016-09-14
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it can be seen from the existing production methods that the bottleneck restricting the commercial development and utilization of natural gas hydrates lies in how to find effective production methods that can be widely used under various gas reservoir conditions

Method used

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  • Rapid Thermal Initiation Production Method of Natural Gas Hydrate
  • Rapid Thermal Initiation Production Method of Natural Gas Hydrate
  • Rapid Thermal Initiation Production Method of Natural Gas Hydrate

Examples

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Embodiment Construction

[0036] The following examples describe the present invention in more detail.

[0037] 1) First, the nano-aluminum powder is transported to the gas reservoir layer through the nano-aluminum powder delivery system in the drilling pipeline, and sprayed onto the surface of the gas reservoir layer through the injection device of the delivery system;

[0038] 2) The aluminum powder is ignited under the action of the ignition system, so that the aluminum powder and ice start to react, forming an initial reaction field.

[0039] 3) The initial reaction field forms a high-temperature zone, which makes the local temperature of the gas reservoir layer rise to 2000K or higher, the equilibrium condition of the gas reservoir on the surface of the reaction zone is destroyed, and the natural gas is decomposed.

[0040] 4) At the same time, the injection device of the conveying system will continuously spray aluminum powder to the reaction zone. During the spraying process, the aluminum powder...

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Abstract

The invention provides a method for rapid thermal activation of natural gas hydrate. 1) Transport the nano-aluminum powder to the gas reservoir layer through the delivery system arranged in the drilling pipeline, and spray the nano-aluminum powder onto the surface of the gas reservoir layer; 2) ignite the nano-aluminum powder; 3) make the local temperature of the gas reservoir layer When it rises above 2000K, the natural gas is decomposed; 4) Continuously inject nano-aluminum powder into the reaction zone, and continue to react in the high-temperature zone to release heat; 5) The natural gas is driven by the high-speed flow of nano-aluminum powder and high temperature; 6) Driven The natural gas and generated hydrogen gradually form a backflow, and a collection pipeline is set in the backflow area to collect and transport the natural gas and hydrogen back to the collection platform. The biggest shortcoming of the traditional heat shock method to exploit natural gas hydrate is the low utilization rate of heat. The invention adopts the reaction of nano-aluminum powder and ice to release a large amount of heat, and at the same time destroys the gas hydrate structure, releases natural gas, and effectively improves the heat utilization rate.

Description

technical field [0001] The invention relates to a method for exploiting natural gas hydrate. Background technique [0002] Natural gas hydrate is a solid crystalline substance formed by natural gas and water molecules under certain pressure and low temperature. The main component of natural gas in natural gas hydrates is methane. The resource has large reserves, wide distribution range, high energy density, less impurities and no pollution. Since the first discovery of natural gas hydrate in the laboratory in 1810 and the artificial synthesis of natural gas hydrate in 1888, scholars at home and abroad have been researching and exploring natural gas hydrate. So far, three hydrate crystal structures have been discovered: I, II and H. The ideal molecular formula of structure I hydrate is 8M·46H 2 O, where M represents the guest molecule. The ideal molecular formula of structure II hydrate is 24M·136H 2 O, structure H hydrate ideal molecular formula is 6M 34H 2 O. In the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/243
Inventor 蒋运华白涛姚跃
Owner HARBIN ENG UNIV
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