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天然气水合物孔底冷冻取样方法的室内试验研究 被引量:13
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作者 郭威 孙友宏 +2 位作者 v.k. chistyakov 张祖培 陈晨 《探矿工程(岩土钻掘工程)》 2009年第5期1-6,共6页
本研究提出的天然气水合物孔底冷冻取样方法是利用外部冷源在孔底降低水合物岩心温度,采用主动式降温的方法降低水合物的临界分解压力,达到被动式降压来抑制水合物分解,获得水合物岩心的方法。首先,通过分析天然气水合物温压特性得出了... 本研究提出的天然气水合物孔底冷冻取样方法是利用外部冷源在孔底降低水合物岩心温度,采用主动式降温的方法降低水合物的临界分解压力,达到被动式降压来抑制水合物分解,获得水合物岩心的方法。首先,通过分析天然气水合物温压特性得出了孔底冷冻取样方法的可行性;然后,借助室内冷冻模拟试验确定了干冰为冷冻剂,酒精作为助冷催化剂和载冷剂的冷冻方式;最后,依据冷冻模拟试验得出的干冰法冷冻方式研制了FCS型天然气水合物孔底冷冻取样器样机,并进行了土层钻进冷冻取样试验,取得冷冻黄土岩心。本研究提出天然气水合物孔底冷冻取样思想,为天然气水合物取样器的设计提供了新的思路。 展开更多
关键词 天然气水合物 孔底冷冻取样 干冰法冷冻方式 取样器
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Problems of ecological and technical safety by exploration and production of natural gas hydrates
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作者 v.k. chistyakov Youhong SUN +1 位作者 Chen CHEN Zupei ZHANG 《Global Geology》 2006年第2期164-167,共4页
Gas hydrates-the firm crystal connections formed water(water,ice,water vapor)and low-molecular waterproof natural gases(mainly methane)whose crystal structure effectively compresses gas:each cubic meter of hydrate can... Gas hydrates-the firm crystal connections formed water(water,ice,water vapor)and low-molecular waterproof natural gases(mainly methane)whose crystal structure effectively compresses gas:each cubic meter of hydrate can yield over 160 m3 of methane.In present time exploitation of the Messoyahsk(Russia)and Mallik(Canada)deposits of gas hydrates in is conducted actively.The further perfection of prospecting methods in the field of studying gas hydrates containing sediments in round extent depends on improvement of geophysical and well test research,among which native-state core drilling is one of the major.Sampling native-state core from gas hydrates sediments keeping not only original composition,but structural-textural features of their construction.Despite of appeal of use gas hydrates as the perspective and ecologically pure fuel possessing huge resources,investigation and development of their deposits can lead to a number of the negative consequences connected with arising hazards for maintenance of their technical and ecological safety of carrying out.Scales of arising problems can change from local up to regional and even global. 展开更多
关键词 gas HYDRATE methane DEPOSIT ecological safety HAZARD technical safety
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