关键词: 塔里木盆地, 塔中隆起, 石油地质特征, 石炭系, 泥岩盖层, 复合油藏体系

Abstract: The successive petroleum exploration cases of foreign paleo-uplifts were comprehensively researched,and the regional and petroleum geology characteristics of Tazhong Uplift were analyzed.The results show that there are some conditions for forming a large petroleum field in Tazhong Uplift of Tarim Basin.Tazhong Uplift took its shape earlier and developed steadily in the later period.There are many huge to large structures in the Lower Paleozonic deposition and a series of source-reservoir-cap compositions under the seal of Carboniferous mudstone.The unconformity in the Lower Carboniferous was the most important event during tectonic evolution and played the most important role during the formation of hydrocarbon traps.The specialty of tectonic evolution and the varied types of oil pools in the Tazhong Uplift resulted in a regional and widespread composite petroleum system under the regional seal of Carboniferous mudstone.It is suggested that oil and gas exploration in the Tazhong Uplift should be considered as a whole.Some oil pay protective measures should be taken during drilling in order to find big oilfields in the near future.

Key words: Tarim Basin, Tazhong Uplift, petroleum geological characteristics, Carboniferous, mudstone seal formation, composite petroleum system