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In‐situ Observations of Engineering Geological Environment during Hydrate Production Tests in Deepwater
Author(s) -
ZHU Chaoqi,
JIA Yonggang
Publication year - 2017
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13252
Subject(s) - in situ , clathrate hydrate , geology , hydrate , petroleum engineering , environmental science , oceanography , geography , chemistry , meteorology , organic chemistry
Corresponding author. E-mail: yonggang@ouc.edu.cn Gas hydrates are ice-like combinations of methane and water. The global inventory of gas hydrates appears to be very large. Recent estimates of the total amount of methane contained in the world’s gas hydrates range from 1500 to 15,000 gigatonnes of carbon. The amount of carbon in gas hydrates is 2 times larger than that present in all known fossil fuel deposit (coal, oil, and natural gas). It may power the mankind for the next 1,000 years. About 97%~98% of natural gas hydrate distribute in continental slope and continental rise, the rest in permafrost zones of Qilian Mountain and Western Siberia (Jia et al., 2016). In China, the gas hydrate samples were first recovered in Shenhu area, the northern slope of South China Sea, in 2007 (Zhang et al., 2007). In 2008, hydrate samples were found in Qilian Mountain. Recently, hydrate samples were recovered in Dongsha and other areas in the northern South China Sea in 2013 and 2015 (Fig. 1).