天然气水合物藏注热开采敏感参数分析

Sensitivity analysis of thermal dissociation of natural gas hydrate

李淑霞 姜兴兴 姜汉桥 李清平

LI Shuxia JIANG Xingxing JIANG Hanqiao LI Qingping

中国石油大学石油天然气工程学院，北京　102249 中国石油大学石油工程学院，山东青岛　266555 中海石油研究中心技术研究部，北京　100027

College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China School of Petroleum Engineering, China University of Petroleum, Qingdao 266555, China Technology Research Department, CNOOC Research Center, Beijing 100027, China

天然气水合物作为一种潜在的未来能源，其开采已经成为天然气工业新的研究热点。基于水合物藏热力开采的机理，建立了数学模型并编制了软件，对影响水合物藏注热开采效果的参数进行了敏感性分析。结果表明，分解前缘移动速度和累积产气量主要受孔隙度、注热温度、初始水合物饱和度、水合物藏初始温度、分解区导热系数和热扩散系数的影响，而未分解区的热力学参数对注热开采影响不大，该研究对今后水合物藏的注热开采具有一定的指导意义。

As a potential energy in the future, natural gas hydrate has become a new hot focus of the natural gas industry. Based on the mechanism of thermal dissociation, a mathematical model is set up and solved. Sensitivity analysis of hydrates production from thermally induced dissociation is conducted to determine the governing parameters. The results show that the thermal dissociation front of hydrates and the gas production are mainly influenced by porosity, injection temperature, initial hydrate saturation, initial hydrate temperature, thermal conductivity and thermal diffusivity of the dissociated zone, while the thermal dissociation of hydrates is less sensitive to the thermodynamics properties of the hydrate zone. This study is useful to the future research of thermal dissociation of natural gas hydrates.