化工学报Issue(4)：1544-1550,7.DOI:10.11949/j.issn.0438-1157.20141258
天然气水合物降压联合井壁加热开采的数值模拟
Numerical simulation of gas production from hydrate by depressurization combined with well-wall heating
摘要
Abstract
The depressurization-induced natural gas hydrate dissociation is limited by heat transfer. This research presented a numerical study of gas production to clarify the dissociation characteristics of depressurization combined with well-wall heating. A 2D cylindrical fully coupled simulator was developed for simulating the laboratory-scale gas production process with depressurization combined with well-wall heating. The simulation results were verified by experimental data. Well-wall heating was beneficial to increasing gas production, and gas generation rate of the depressurization combined with well-wall heating method was higher than the depressurization method alone. Well-wall heating could improve the thermal conditions of hydrate-bearing sediments, but the influence was not large because heat was transmitted to only a small dissociation area due to small heating surface and slow heat conduction. On the other hand, the effect of different heating temperatures on gas production could be neglected. Finally, gas production depended strongly on the boundary thermal conditions. The depressurization combined with well-wall heating method may not be feasible for hydrate exploitation in a surrounding with a lower geo-temperature gradient.关键词
天然气水合物/降压/加热/模型/数值模拟/实验验证Key words
natural gas hydrate/depressurization/heating/model/numerical simulation/experimental validation分类
能源科技引用本文复制引用
阮徐可,李小森,徐纯刚,张郁,颜克凤..天然气水合物降压联合井壁加热开采的数值模拟[J].化工学报,2015,(4):1544-1550,7.基金项目
国家自然科学基金项目(51306188)；国家杰出青年科学家基金项目(51225603)；国家海洋地质专项(GHZ2012006003)；人才引进基金项目(y307r11001)；海洋能源利用与节能教育部重点实验室开放基金项目。@@@@supported by the National Natural Science Foundation of China (51306188), the National Natural Science Foundation for Distinguished Young Scholars of China (51225603) and the National Oceanic Geological Special Projects (GHZ2012006003) （51306188）
