祁连山冻土区DK-9孔温度监测及天然气水合物稳定带厚度

发布时间：2018-02-15 15:29

  本文关键词： 天然气水合物 温度监测 地温梯度 水合物稳定带 祁连山　出处：《现代地质》2017年01期 　论文类型：期刊论文

【摘要】：祁连山冻土区木里盆地三露天井田自2008年首次钻采到天然气水合物实物样品以来,实现了中低纬度高山冻土区天然气水合物勘探的重大突破。天然气水合物钻孔DK-9于2013年发现水合物,通过对该孔长期地温实时监测,获得了稳态的地温数据。结果表明,祁连山多年冻土区聚乎更矿区三露天井田冻土层底界为约163 m,冻土层的厚度达约160 m,冻土层内的地温梯度为1.38℃/100 m,冻土层以下的地温梯度达4.85℃/100 m。根据天然气水合物形成的温-压条件分析,聚乎更矿区具备较好的天然气水合物形成条件,天然气水合物稳定带底界深度处于510~617 m之间。
[Abstract]:Since 2008, when the physical samples of natural gas hydrate were first drilled out in the third open-pit mine field of the Muli Basin in the frozen soil region of Qilian Mountains, The gas hydrate was discovered by DK-9 in 2013, and the steady-state geotemperature data were obtained by real-time monitoring of the long-term ground temperature of the borehole. In the permafrost region of Qilian Mountain, the bottom boundary of permafrost is about 163 m, the thickness of permafrost is about 160 m, the geothermal gradient in permafrost is 1.38 鈩，

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