Modeling on Gas Hydrate Formation Conditions in the Qinghai-Tibet Plateau Permafrost
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Based on the field-investigated gas geochemistry, the modeling of gas hydrate formation conditions in the Qinghai-Tibet plateau permafrost (QTPP) was conducted in this article.Abstract:
Based on the field-investigated gas geochemistry, the modeling of gas hydrate formation conditions is conducted in the Qinghai-Tibet plateau permafrost (QTPP) in combination with predecessors' data such as the permafrost ground temperature (T0), the thermal gradient within the frozen layer (G1) and the thermal gradient below the frozen layer (G2). The modeled results show that the permafrost characteristics generally meet the requirements for gas hydrate formation conditions in the study area. Gas composition, temperaturerelated permafrost parameters (e.g. T0,G1,G2) are the most important factors affecting gas hydrate formation conditions in the study area, whose spatial variations may cause the heterogeneity of gas hydrate occurrences. The most probable gas composition to form gas hydrate is the hybrid of methane and weight hydrocarbon gases (ethane and propane). In the predicted gas hydrate locations, the minimal upper depth of gas hydrate occurrence is less than one hundred meters and the maximum lower depth can reach one thousand meters with the thickness up to several hundred meters. Compared with Canadian Mallik gas hydrate field, the QTPP is favorable for gas hydrate formation in aspects of G1, G2 and gas composition, except for relatively thin permafrost, still suggesting great gas hydrate potentials.read more
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Numerical simulation of gas production from hydrate deposits using a single vertical well by depressurization in the Qilian Mountain permafrost, Qinghai-Tibet Plateau, China
Jiafei Zhao,Tao Yu,Tao Yu,Yongchen Song,Di Liu,Weiguo Liu,Yu Liu,Mingjun Yang,Xuke Ruan,Yanghui Li +9 more
TL;DR: In this paper, the authors used a single vertical well by depressurization method to simulate the gas production potential of the gas hydrate deposits in the Qilian Mountain permafrost.
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Gas hydrate occurrences in the Qilian Mountain permafrost, Qinghai Province, China
TL;DR: In this article, four scientific experimental wells were drilled in the Qilian Mountain permafrost of Qinghai Province, China, in 2008 and 2009 to evaluate the type of clathrates recovered from these sites, including structures containing large and small cages of hydrocarbon gases.
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Numerical simulation of gas production potential from permafrost hydrate deposits by huff and puff method in a single horizontal well in Qilian Mountain, Qinghai province
TL;DR: In this paper, the authors employed the huff and puff method using a single horizontal well in the middle of the Hydrate-Bearing Layer (HBL) to numerically investigate the gas production potential from hydrates at the DK-3 drilling site of the Qilian Mountain permafrost, which is located in the north of the Qinghai-Tibet plateau.
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Evaluation of gas production from Qilian Mountain permafrost hydrate deposits in two-spot horizontal well system
TL;DR: Zhang et al. as mentioned in this paper investigated the commercial viability of gas hydrate deposits in the Qinghai-Tibet Plateau permafrost during the Scientific Drilling Project of Gas Hydrate.
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Comparison of the characteristics for natural gas hydrate recovered from marine and terrestrial areas in China
Changling Liu,Qingguo Meng,Xingliang He,Chengfeng Li,Yuguang Ye,Lu Zhenquan,Youhai Zhu,Yonghong Li,Jinqiang Liang +8 more
TL;DR: In this article, the characteristics of occurrence, structure and gas composition of marine gas hydrate from the South China Sea (SCS) were compared with those from Qilian Mountain permafrost (QMP) in 2009 and 2013.
References
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Journal Article
Potential distribution of natural gas hydrate in the permafrost regions of qinghai-tibet plateau
TL;DR: In this article, a regression analysis of the permafrost thickness was carried out using the data of ground temperature drills and gives the spatial distribution characteristics of the annual ground temperature and the thickness of permfrost in the Qinghai-Tibet plateau, which is the potential region for the distribution of natural gas hydrate in China.
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TL;DR: In this article, a semi-quantitative analysis on various intrinsic factors (such as temperature, pressure, gas composition, pore-water salinity, sediment pore size) is conducted to characterize their effects on gas hydrate formation conditions and its fraction out of pore space.
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Formation and Geochemical Exploration Model of Gas Hydrate in the Perennial Frozen Soil Area,Qinghai-Tibet Plateau
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