海底沉积物层内CO<sub>2</sub>泄漏渗流与水合耦合规律研究

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海底沉积物层内CO₂泄漏渗流与水合耦合规律研究

更新时间：2025-07-09

- 海底沉积物层内CO₂泄漏渗流与水合耦合规律研究
- Issue 9, Pages: 134-139(2013)
- 作者机构：
  
  西安交通大学化学工程与技术学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： P744.4
- Published：2013
- 稿件说明：
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[J]. 2013, (9): 134-139.
DOI：

[J]. 2013, (9): 134-139. DOI：

摘要

为了探讨CO2在海底沉积物层内的泄漏渗流与水合耦合规律

将Darcy定律与水合物生成动力学方程通过质量守恒方程耦合

构建了描述海底沉积物层多孔介质中CO2泄漏渗流与水合物生成相互影响的动态演化数学模型。采用数值模拟方法研究了不同温度下多孔介质体系中CO2水合物饱和度随时间和空间的变化规律

以及CO2水合物生成对海底沉积物层渗流特性参数的动态影响。结果表明:在海底沉积物层水合区的泄漏口处

CO2水合物生成较为迅速

15a内

由于CO2水合物的生成、生长和积聚

导致近泄漏口处渗透率减小近2个数量级

由初始值1.0×10-12 m2减小到6.5×10-14 m2

有效孔隙度由初始值0.3减小到0.209 5

降幅达30%

形成了超低渗透的CO2水合物盖层;海底沉积物层水合区的温度越低

CO2水合物的饱和度越低

使得更多的游离CO2渗流泄漏入远场

当沉积物层温度为281K左右时

远场处受泄漏影响最小

CO2的饱和度也最低。

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海底沉积物层内CO2泄漏渗流与水合耦合规律研究

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摘要

Abstract

关键词

Keywords

references

海底沉积物层内CO₂泄漏渗流与水合耦合规律研究