Device and method for efficiently exploiting natural gas hydrate by adopting flue gas of power plant

Device and method for efficiently exploiting natural gas hydrate by adopting flue gas of power plant

  • CN 105,971,581 A
  • Filed: 06/30/2016
  • Published: 09/28/2016
  • Est. Priority Date: 06/30/2016
  • Status: Active Application
First Claim
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1. the method for power-plant flue gas efficiently extracting natural gas hydrate, it is characterised in that first get out two mouthfuls at hydrate reservoirAbove horizontal well;

  • Described horizontal well includes more than one injection well and more than one recovery well;

    Begin with blood pressure lowering to openThe mode of adopting is exploited, when corresponding to hydrate reservoir pressure drop as little as reservoir temperature the 5% ~ 15% of hydrate phase balance pressureTime, inject the flue gas higher than hydrate reservoir pressure 2 ~ 4 MPa by injecting well to hydrate reservoir, be injected into the flue gas on stratumReact the gaseous mixture obtained containing methane with the hydrate in hydrate reservoir, swollen to turbine through recovery well, pipelinedSwollen device recovery section pressure energy, the gaseous mixture after turbine expansion device is delivered to membrane separation device and removes nitrogen, and film dividesGas after device processes is fed directly to decarbonization device by pipeline and carries out decarburization, finally gives required product gas firstAlkane gas.

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