Gas Hydrates in the Qilian Mountain Permafrost, Qinghai, Northwest China
Gas Hydrates in the Qilian Mountain Permafrost, Qinghai, Northwest China
复制标题
DOI：
10.1111/j.1755-6724.2010.00164.x
复制
发表时间：
2010-01
期刊：
影响因子：
--
通讯作者：
Youhai Zhu;Yongqing Zhang;H. Wen;Zhenquan Lu;Zhi-Qing Jia;Yonghong Li;Qinghai Li;Changling Liu-Changling-Li
中科院分区：
文献类型：
--
作者：
Youhai Zhu;Yongqing Zhang;H. Wen;Zhenquan Lu;Zhi-Qing Jia;Yonghong Li;Qinghai Li;Changling Liu-Changling-Li
祁连山多年冻土区位于青藏高原北部，面积约10×104 km 2。该区天然气水合物勘探条件优越，具有巨大的勘探潜力。中国地质调查局于2008-2009年在青海省天峻县木日煤田巨虎埂实施了祁连山多年冻土区天然气水合物科学钻探项目。已完成科学钻探威尔斯井4口，总进尺2059.13米。分别从DK-1、DK-2和DK-3孔采集天然气水合物样品。天然气水合物赋存于133-396 m的冻土带之下。样品为白色结晶，易燃烧。异常低温已被红外相机识别。含天然气水合物的岩心在水中强烈起泡。含水合物岩心喷出气泡和水滴，留下蜂窝状结构特征，利用拉曼光谱检测出典型的天然气水合物光谱曲线。此外，测井剖面还显示出高电阻率和声速。祁连山天然气水合物具有冻土带较薄、埋藏较浅、天然气成分较复杂、煤层气成因等特点。
Qilian Mountain permafrost, with area about 10×104 km2, locates in the north of Qinghai‐Tibet plateau. It equips with perfect conditions and has great prospecting potential for gas hydrate. The Scientific Drilling Project of Gas Hydrate in Qilian Mountain permafrost, which locates in Juhugeng of Muri Coalfield, Tianjun County, Qinghai Province, has been implemented by China Geological Survey in 2008–2009. Four scientific drilling wells have been completed with a total footage of 2059.13 m. Samples of gas hydrate are collected separately from holes DK‐1, DK‐2 and DK‐3. Gas hydrate is hosted under permafrost zone in the 133–396 m interval. The sample is white crystal and easily burning. Anomaly low temperature has been identified by the infrared camera. The gas hydrate‐bearing cores strongly bubble in the water. Gas‐bubble and water‐drop are emitted from the hydrate‐bearing cores and then characteristic of honeycombed structure is left The typical spectrum curve of gas hydrate is detected using Raman spectrometry. Furthermore, the logging profile also indicates high electrical resistivity and sonic velocity. Gas hydrate in Qilian Mountain is characterized by a thinner permafrost zone, shallower buried depth, more complex gas component and coal‐bed methane origin etc.