论文部分内容阅读
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。
How to accurately evaluate the amount of methane hydrate in sediments is a hot issue in the field of oil and gas research. In this paper, based on Darcy’s law, the depth distributions of hydrate stable zone and sedimentary zone are quantified through theoretical models and the influencing factors of their boundary conditions are analyzed in detail. At the same time, the quantitative determination of approximate hydrate deposition time range and sedimentary distribution characteristics was carried out. These results show that the distribution boundaries of hydrates in nature are largely related to the seafloor methane flux, heat flux, water depth and the fluid flux in the sediment, and the thickness of the methane hydrate deposition zone will reach and remain a critical constant. The hydrate accumulation time and distribution characteristics are related to different diffusion systems. Therefore, during the resource assessment of methane hydrate, it is very important to understand and confirm some of the above parameters to solve the resource evaluation process.