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基于青海木里冻土区的气体组成、钻孔泥浆的温度测量数据等对该区水合物稳定带的顶底深度进行了模拟计算,并将计算结果与钻探揭示的水合物产出深度进行了对比.模拟计算的水合物顶深在148.8～122.7 m间,底深在324.6～354.8 m间,水合物厚度在175.8～232.2 m间,钻探揭示水合物及其异常产出在133～396 m间层段,两者具有可比性,彼此结果基本一致,显示模拟手段可以很好地服务于水合物稳定带顶底深度的预测.气体组成、冻土深度、冻土层内地温梯度、冻土层下地温梯度等是影响木里冻土区水合物稳定带顶底深度的主要敏感因素.
Based on the gas composition of the permafrost zone in Qinghai and the temperature measurement data of drilling mud, the top and bottom depths of the hydrate stability zone in this area are simulated and the results are compared with the depth of hydrate production revealed by drilling The calculated hydrate depths range from 148.8 to 122.7 m with depths between 324.6 and 354.8 m and hydrate thickness between 175.8 and 232.2 m. Drilling reveals that hydrates and their anomalous yields are between 133 and 396 m Which are comparable with each other and the results show that the simulation method can well serve the prediction of the top and bottom depths of the hydrate stable zone.The gas composition, the depth of frozen soil, the geothermal gradient in the frozen soil layer, the frozen soil layer The lower geothermal gradient is the main sensitive factor that affects the top depth of hydrate stability zone in Muli permafrost.