塔里木盆地塔中低凸起志留系油气成藏机理初探

PRELIMINARY INVESTIGATION ON THE FORMATION MECHANISM OF SILURIAN RESERVOIR IN TAZHONG LOW—UPLIFT OF TARIM BASIN

吕修祥

Lu Xiuxiang

石油大学, 北京 102200

University of Petroleum, Beijing 102200

塔里木盆地塔中低凸起是在早加里东期的早奥陶世末期沉积隆起背景上,形成于晚加里东期的早古生界残余古隆起。该区广泛分布的志留系沥青砂岩形成于油气运移聚集过程中而非油气成藏以后。志留系捕集油气经历了油气聚集－破坏－再聚集的复杂过程。志留系的有利油气聚集区是塔中低凸起的西北倾没部位。

Tazhong low-uplift is an early Paleozoic remnant paleo-uplift,which was formed during the late Caledonian period on the background of the sedimentary uplift developed during the early Caledonian period.The Silurian asphalt sandstones extensive in the area were formed in the process of petroleum migrationand accumulation rather than after reservoir formation.The entrapment of hydrocarbons by the Siluriansandstones experienced a complicated process of accumulation,destruction and reaccumulation.Thefavourable petroleum accumulation area in the Silurian considered as target bed is the plunging part innorthwestern Tazhong low-uplift.

国家教委博士后科学基金

https://doi.org/10.11781/sysydz199704328