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天然气水合物是一种重要的新型能源。在数值模拟方面,目前国内还没有较完善的天然气水合物注热开采数值模拟软件。本文在调研了国内外关于天然气水合物开采的数学模型的基础上,建立三维三相五组分水合物注热开采数学模型,模型中特别考虑了盐这种抑制剂对水合物分解的影响。模型中包含:各组分质量守恒方程,能量守恒方程,水合物分解动力学方程;考虑了气水两相渗流过程、热对流、热传导,更兼顾考虑了水合物层与盖底层的热交换的影响,使模型更完善。
Gas hydrate is an important new energy source. In numerical simulation, there is no perfect numerical simulation software for natural gas hydrate injection in China at present. Based on the investigation of the mathematical models of natural gas hydrate recovery at home and abroad, this paper establishes the mathematical model of three-dimensional three-phase five-component hydrate injection. In this model, the effects of salt inhibitors on the decomposition of hydrates are specially considered. The model includes the mass conservation equation, the energy conservation equation and the hydrate decomposition kinetics equation of each component. Considering the gas-water two-phase seepage process, heat convection and heat conduction, the model considers both the heat exchange between the hydrate layer and the bottom layer Impact, make the model more perfect.