| 作 者：支家生 |
| 单 位：中国石油集团杭州地质研究所 |
| 基金项目： |
| 摘 要： |
| 业已查明在海床中存在天然气水合物,由此推论地质历史上的海洋中同样存在这种水合物,且主要赋存于深海槽及其两侧地区。另外,世界上已知大油气区多与来自古地槽区的油气源有关。在四川盆地发现的巨大天然气储量难以由已知源岩提供,因此可以考虑到秦岭、龙门山在上扬子地块北缘、西缘的大陆边缘深水槽区,它们在回返造山过程中由天然气水合物的释放和迁移可能提供了大量气源。类似的地台（块）区油气勘探选区可由此借鉴。 |
| 关键词：天然气水合物；四川盆地；天然气成因；油气远景 |
| Author's Name: Zhi Jiasheng |
| Institution: HIPG PetroChina |
| Abstract: |
| It is known that a great amount of natural gas hydrate exists under deep sea floors and hydrocarbon sources of many known huge oil and gas provinces in the world are associated with paleogeosyclines. It is inferred that gas hydrate could have existed under paleosea floors such as deepsea troughs and their sides during geological history. It is deemed that the a large quantity of natural gas reserves that are present in Sichuan Basin could be hardly supplied all by the known source rocks, so some of the gas reserves might be derived from the gas released and migrated by gas hydrate within deepwater geosyclines along the northern and western continental margins of Upper Yangzi Massif during inversing orogeny (Chinling and Longmen mountains formed). Resembling hydrocarbon prospecting areas as it can be also inferred for reference. |
| Keywords: Natural gas hydrate; Origin of natural gas; Oil and gas potential; Sichuan Basin |
| 投稿时间： 2007-04-10 |
