东海海礁凸起及邻近海区油气表层地球化学勘查

基金项目: 上海海洋地质调查局局级科研项目(92018).

OIL AND GAS SURFACE GEOCHEMICAL EXPLORATION IN THE HAIJIAO UPLIFT AND ITS NEIGHBOURING OF THE EAST CHINA SEA

No.1 Marine Geological Investigation Party, Shanghai Bureau of Marine Geology, SINOPEC, Shanghai 201208, China

摘要: 海礁凸起和浙闽隆褶区油气化探异常为其深部前新生代沉积盆地油气藏物质向上渗透的结果。沉积物酸解烃湿度系数和δ¹³C₁分析数据表明,钱塘凹陷、舟山群岛及上海附近海域沉积物中散布的气体,主要为热解成因的深层天然气。与西湖凹陷、海礁凸起的天然气类同,主要来自深部的过成熟天然气。浙闽隆褶区热解成因的天然气烷烃丰度高于平湖五井烷烃丰度。
- 地球化学勘探 /
- 油气 /
- 海礁凸起 /
- 东海
Abstract: The hydrocarbon geochemical anomalies in the Haijiao Uplift and the Zhejiang Fujian Upfold are the result of upwards seepage of hydrocarbon in the deep pre Cenozoic sedimentary basin.The analytical data of wetness coefficient of acid extracted hydrocarbon of sediment and its δ¹³ C₁ shows that the gas in Qiantang Sag,the Zhoushan Islands and the offshore area around Shanghai are mainly from the thermal cracking of natural gas in deep.They are similar with the gas in Xihu Sag and the Haijiao Uplift which is the over matured gas of deep part.The alkane hydrocarbon abundance index of the gas from Zhejiang Fujian Upfold is higher than that from Pinghu 5 well.
- geochemical exploration /
- oil and gas /
- the Haijiao Uplift /
- the East China Sea

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