天然气水合物藏开采数值模拟技术研究进展

中国天然气水合物资源丰富,实现天然气水合物商业化开采,对于缓解中国能源短缺压力具有战略意义。数值模拟是指导天然气水合物藏安全有效开采的重要技术手段,通过对水合物藏产能预测与动态分析,可以实现对开采方法的优选、可采资源评价和开发方案优化。天然气水合物藏开采过程涉及水合物分解相变与气水在地层内渗流传热等多个物理化学过程之间的复杂耦合机理。重点介绍了水合物藏开采现状、水合物藏开采数学模型优化研究、天然气水合物开采数值模拟应用进展,分析了数值模拟研究的核心问题、取得的进展以及当前亟需解决的瓶颈问题,并指出水合物藏开采数值模拟发展趋势,对于开展天然气水合物数值模拟研究具有较好的指导意义。

Research Progress of Numerical Simulation Technology of Natural Gas Hydrates Production

China is rich in natural gas hydrate resources, and the realization of commercial exploitation of natural gas hydrate is of strategic significance to alleviate the pressure of energy shortage in China. Numerical simulation is an important technical means to guide the safe and effective exploitation of natural gas hydrate reservoirs. The optimization of exploitation methods, the evaluation of recoverable resources and the optimization of development schemes can be realized by numerical simulations of hydrate reservoirs productivity. The gas production from hydrate reservoir involves the complex coupling mechanism between the hydrate decomposition, flow and heat transfer of gas and water in the formation. This paper focused on the current situation of hydrate reservoir exploitation, numerical model optimization, and the application progress of numerical simulation for natural gas hydrate exploitation. The core problems of numerical simulation research, the progress achieved and the bottleneck problems were analyzed. Moreover, the development trend of numerical simulation for hydrate reservoir were pointed out. It has a good guiding significance for the numerical simulation of natural gas hydrate.