Analysis on Potential Gas Source of Gas Hydrate from the Original Characteristics of Shallow Gas in the North of the South China Sea
详细信息
- 责任者：Fu Ning (Research Institute ; CNOOC ; Beijing 100027 ; China) ; Lin Qing
- 刊名：Geoscience
- 出版年：2011
- 卷期：25(2)
- 关键词：浅层气 ; shallow gas ; 天然气水合物 ; gas hydrates ; 南海 ; South China Sea
- 页码：p.332-339
- 图表：7 illus., 2 tables, 19 refs.
- 分类号：1003
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
Analytic techniques of the light hydrocarbon and the carbon isotope of natural gases were employed to cast light on the natural gas origin of shallow gas reservoirs and the migration characteristics, and the origin of the gas hydrate proved in the north of the South China Sea, in combination with the regional geology and gas hydrate data. The result indicates that the natural gas from shallow reservoirs is a mixture of biogenic gas and thermal genetic gas. It reveals that the potential gas source for gas hydrate was not limited to biogenic gas, but the biodegradation gas and thermal genetic gas have great contribution to the gas hydrate. The thermal genetic gas in the mixture gases is from deep hydrocarbon reservoirs, which indicates that the gas hydrate maybe has a close relationship with the regular deep hydrocarbon reservoirs.