摘要
如何能够准确评价沉积物中甲烷水合物的资源量是目前油气界研究的热点问题。本文以达西定律为基础 ,通过理论模型对水合物稳定区、沉积区的深度分布进行了量化并对各自的边界条件的影响因素做了详细的分析。同时对大概的水合物沉积时间范围和沉积分布特征的量化进行了确定。这些结果表明了自然界中水合物的分布边界很大程度上与海底甲烷通量、热能通量、水深和沉积物中流体通量有关 ,甲烷水合物沉积区厚度会到达并保持一个临界恒定值。水合物的聚集时间和分布特征与不同的扩散体系有关。因此在进行甲烷水合物的资源评价当中 ,了解并确定上述一些参数是解决资源评价过程的非常重要的一个环节。
It is quite important how to evaluate the methane hydrate resource in marine sediments accurately. Based on Darcy's law, the depth distribution of the stability zone and the deposits zone of gas hydrate is quantified, and the effective factors of their boundary conditions are identified carefully with the theoretical model. Also, the time scope and the distribution features of gas hydrate deposits are resolved quantitatively. The results indicate the distribution range of gas hydrate is related mainly with the bottom-sea methane flux and thermal flux, the water depth and the fluid flux in the deposits. The thickness of hydrate deposits will reach and keep a constant critical value. The accumulation time and the distribution features of gas hydrate are related with the different diffusion system. So, it is very important to know the above parameters for the resource evaluation of methane hydrate.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2003年第3期24-28,共5页
Natural Gas Industry
基金
国家自然科学基金 ( 4 99730 2 4
4 0 2 72 0 6 6 )
气体地球化学国家重点实验室基金项目(SJJ- 0 1- 0 2 )研究成果
