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AVO Character Research of Natural Gas Hydrates in the East China Sea

AVO Character Research of Natural Gas Hydrates in the East China Sea

作     者:LIU Huaishan HUANG Guangnan HE Yi TONG Siyou CUI Shuguo ZHANG Jin 

作者机构:Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education Ocean University of China Qingdao 266100 P. R. China 

出 版 物:《Journal of Ocean University of China》 (中国海洋大学学报(英文版))

年 卷 期:2009年第8卷第3期

页      面:270-276页

学科分类:081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 0824[工学-船舶与海洋工程] 

基  金:supported by the National High Technology Research and Development (863) Program (Grant No.2006AA09Z339) the Natural Science Foundation of Shandong, China (Grant No. Y2006E09) 

主  题:natural gas hydrates free gas blank zone Okinawa Trough 

摘      要:Natural gas hydrates are considered as strategic resources with commercial potential in the 21st century. Obvious BSR characteristics will be shown on seismic profiles, if there exist natural gas hydrates. The AVO method is one of the methods which can be used to identify and forecast lithologic characteristics and fluid properties by using the relationship between Amplitude and Offset. AVO anomaly is one of the significant signs to check out whether or not there is free gas below the BSR, so it can be used to detect natural gas hydrates from the seismic profile. Considering the geological and geophysical characteristics of the Okinawa Trough and making use of the techniques mentioned above, we can conclude that the conditions there are favorable for the formation and concentration of natural gas hydrates. By analyzing the data collected from the study area, one can discover many different anomalous phenomena on the seismic profile which are related to the existence of natural gas hydrates. Preliminary estimation of the natural gas hydrates in the Okinawa Trough shows that the trough is rich in natural gas hydrates and may become a potential important resources exploration area.

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