摘要
海域天然气水合物的岩石物性分析研究是水合物地震识别研究的基础和主要组成部分。分别采用弹性模量模型和修改的威利方程对水合物沉积层和下伏含游离气层的岩石物性关系进行了讨论,重点研究了沉积层孔隙度、天然气水合物饱和度、含游离气层饱和度与纵、横波速度、泊淞比的关系。研究的结果表明,水合物沉积层的纵、横波速度和泊淞比随水合物饱和度的增加而增加,密度随饱和度的增加而降低。
Analysis of lithophysical properties of gas hydrate in the sea areas is the basis and main part of seismic recognition study of gas hydrate.The authors use elastic modulus model and Wyllie equation to discuss the relation between the lithophysical properties of hydrate-bearing sediments and the underlying free-gas -bearing layer with the emphasis put on sediment porosity,hydrate saturation,gas saturation,and the relation between p and s wave velocities and Poisson’s ratio.The study results show that the p and s wave velocities and Poisson’s ratio of the hydrate-bearing sediments increase with the increase of the hydrate saturation,and the density decrease with the increase of the saturation.
出处
《海洋地质动态》
2004年第6期13-17,48,共5页
Marine Geology Letters
