天然气水合物微波辅助开采模拟研究

Simulation Study on Microwave Assisted Exploitation of Natural Gas Hydrate

为了提高天然气水合物开采效率及能量利用率,本文采用微波加热辅助开采,并根据南海神狐海域的水合物储层物性特征,建立了天然气水合物微波加热开采数值模型,模拟分析了不同微波加热方式下天然气水合物分解速率和能量利用率的变化情况。模拟结果表明:在使用纯微波加热开采水合物时,持续微波加热能够有效提升储层平均产气速率,而缩短微波加热时间能够有效提高能量利用率;在相同加热时间下,单循环加热的平均产气速率和能量利用率都要高于双循环加热。

In order to further improve the gas production rate and energy utilization rate of natural gas hydrate exploitation,a numerical model for microwave heating extraction of natural gas hydrates is established based on the physical characteristics of hydrate reservoirs in the Shenhu Sea area of the South China Sea using microwave heating to assist exploitation,to analyzed the decomposition rate and energy utilization rate of natural gas hydrates under different microwave heating methods.The simulation results show that the average gas production rate of the reservoir could be improved using continuous microwave,while energy utilization efficiency would be increased with shortening the microwave heating time.The average gas production rate and energy utilization rate of single cycle heating are higher than those of double cycle heating with the same heating time.