永久冻土区天然气水合物饱和度评价技术

基金项目:

中国地质调查局地质调查项目"青藏高原冻土带天然气水合物调查评价"(1212010818055)

详细信息

SATURATION EVALUATION OF GAS HYDRATE IN PERMAFROST SEDIMENTS

Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

摘要: 在评价永久冻土区天然气水合物资源量时,沉积层孔隙中水合物饱和度的确定至关重要。总结了冻土区水合物饱和度评价方法,主要介绍了直接测试估算法、孔隙水地球化学估算法和地球物理测井估算法。在水合物饱和度估算过程中,每种方法都存在缺陷。因此,在对复杂的冻土沉积体系中水合物饱和度进行估算时,应根据实际情况选用一种以上的方法相互验证,以提高估算精度。
- 天然气水合物 /
- 饱和度评价 /
- 孔隙水地球化学 /
- 地球物理测井 /
- 永久冻土区
Abstract: Accurate calculation of gas hydrate saturation in permafrost sediments is critical to gas hydrate resource assessment. Methods of evaluating gas hydrate saturation mentioned in literatures were summarized in this paper, such as the methods of direct measurement, pore water geochemistry evaluation and well-log evaluation. Each method, in fact, is not accurate enough, so it is recommended that no less than two methods be selected for mutual authentication so as to improve precision.
- gas hydrate /
- saturation evaluation /
- pore water geochemistry /
- well-log /
- permafrost