Geochemical Characteristics of Gaseous Hydrocarbons and Hydrate Resource Prediction in the Qiong-dongnan Basin of the South China Sea
Geochemical Characteristics of Gaseous Hydrocarbons and Hydrate Resource Prediction in the Qiong-dongnan Basin of the South China Sea
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发表时间：
2007
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通讯作者：
Sun Chun-yan
中科院分区：
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作者：
Sun Chun-yan
天然气水合物的研究以地球物理、地球化学和地质学等学科为基础。地球化学找矿方法是其中的一项研究，可以从海底沉积物中获得一些天然气水合物的地球化学标志，从而建立天然气水合物异常区域。近年来发现的大量地球物理和地球化学证据表明，南海东北部是中国最有前景的天然气水合物含气区之一。2005年，在南海琼东南盆地天然气水合物地球化学工作区内现场检测了93个点。根据该探测沉积物的酸解烃测试和同位素分析，研究了气态烃异常的分布及其成因。结合西沙海槽天然气水合物成藏的地质条件和勘探研究，对该区天然气水合物远景进行了预测。结果将为该区天然气水合物找矿提供一个突出的地球化学标志。
Researches on gas hydrates are based upon geophysics, geochemistry and geology,and so on.By geochemical prospecting approach,as one of these researches,we could obtain some geochemical marker of gas hydrate from sediment undersea,and then establish the anomaly area of gas hydrate.Recently many geophysical and geochemical evidences have been discovered,which indicate that the northeast of the South China Sea is one of the most prospective gas hydrate bearing areas in China.In 2005,93 sites at the geochemical work area for gas hydrate in Qiong-dongnan Basin of the South China Sea have been detected on-site.According to the acidolysis hydrocarbon test of the sediment from this detection and the isotopic analysis,the distribution of gaseous hydrocarbon anomaly and its causes have been studied in this paper.The prospect of gas hydrate in this work area has been estimated here on the ground of the geological condition for gas hydrate accumulation and the detective study over the Xisha Trough.The results will show an outstanding geochemical marker for gas hydrate prospecting in this work area.