摘要
天然气水合物以其清洁高效、储量大等特点成为一种潜力性能源，但是开采过程中可能会引起海底滑坡、地层沉降等地质灾害，需要对天然气水合物储层的强度特征及强度准则进行研究。以往学者对不同天然气水合物储层样品强度参数与饱和度变化的关系进行了许多研究，但是不同含天然气水合物储层样品实验得到的关系并不统一。本文针对此问题，基于各含天然气水合物储层样品强度参数随饱和度的变化关系进行总结和分析，并对于峰值强度和残余强度分别建立了相应的强度准则。
关键词： 天然气水合物储层；强度准则；峰值强度；残余强度
Abstract
Natural gas hydrate has been becoming a potential source because of its clean, efficient and large reserves, but some geological disasters, such as seabed landslide and formation settlement, may occur during its exploitation, so it is necessary to study the strength characteristics and strength criteria of natural gas hydrate bearing sediment samples. Many researchers have conducted many studies on the relationship between the strength parameters of different kind natural gas hydrate bearing samples and the change of saturation, but the relationship obtained from experiments on natural gas hydrate bearing samples with different saturations is not uniform. So in this paper, the relationships between the strength parameters and saturations are summarized and analyzed based on the test results on different samples. The corresponding strength criteria for peak strength and residual strength are established.
Key words： Natural gas hydrate bearing sediment; Strength criteria; Peak strength; Residual strength
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