关键词: 塔里木盆地, 成烃期, 油气资源, 勘探前景

Abstract: Based on quantitative calculation of amounts of generated oil and gas in different periods and the cumulative ones in Trim Basin, it is pointed out in this paper that the cumulative amount of petroleum generated in Trim Basin is huge, and oil and gas must have accumulated to a large extent. Since oil generated early in geologic time, the early formed large pools were intensively destroyed and reformed by lots of later tectonic movements. So, the scale of oil accumulations decreased largely. Therefore, exploration for oil in the basin should concentrate on seeking middle and small-sized oil fields. Most of the gas was also generated in the Paleozoic era, but compared with oil the proportion of gas generated in Mesozoic and Cenozoic eras is greater. These later generated gas is the main gas resources in the basin, which resulted in better gas prospect than oil prospect. The richer gas resources and the centralized era of their distribution formed the excellent gas prospect. It is expected that the Tarim Basin will be a gas-rich basin.

Key words: Tarim Basin, period of HC forming, oil and gas resource, prospect of exploration