现代地质2017，Vol.31Issue(1)：158-166,9.
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
Temperature Monitoring Results for Gas Hydrate Borehole DK-9 and Thickness of Gas Hydrate Stability Zone in the Qilian Mountains Permafrost
摘要
Abstract
Gas hydrate was discovered in 2008 in the Sanlutian coalfield,Qilian Mountain permafrost,Northwest China.This discovery was first successfully sampled by drilling in mid-low-latitudes mountain permafrost,and was a breakthrough in gas hydrate exploration in onshore regions of China.Temperature monitoring for gas hydrate scientific borehole DK-9,one of boreholes in the Sanlutian coalfield in which gas hydrate was discovered,yielded steady ground temperature data for both in and beneath permafrost layer for one year.The results suggest that the thickness of permafrost in the Sanlutian coalfield is about 160 m and that the geothermal gradient is 1.38 ℃/100 m in the permafrost layer and 4.85 ℃/100 m below the permafrost layer.Analysis of the gas hydrate stability conditions indicate that the permafrost conditions and gas components are favorable for gas hydrate formation,and the maximum depth of the gas hydrate stability zone (GHSZ) in the Sanlutian coalfield is 510-617 m.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Key words
gas hydrate/geothermal gradient/gas hydrate stability zone/Qilian Mountain分类
天文与地球科学引用本文复制引用
王超群,丁莹莹,胡道功,戚帮申,张耀玲,陶涛,吴环环..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[J].现代地质,2017,31(1):158-166,9.基金项目
中国地质调查局项目“祁连山冻土区天然气水合物资源勘查”(GZHL20120301),“泛珠三角地区活动构造与区域地壳稳定性调查”(DD20160269). （GZHL20120301）
