东巴伦支海盆地构造演化与含油气前景

Tectonic Evolution and Hydrocarbon Prospects of East Barents Basin

东巴伦支海盆地位于北极海域,是一个发育有完整前裂谷-同裂谷-后裂谷层序的大陆边缘裂谷盆地,形成于贝加尔期-加里东期基底之上。盆地主要沉积层序为上古生界泥盆-石炭纪前裂谷期拗陷沉积单元、二叠-三叠纪同裂谷期沉积单元和三叠纪晚期-早第三纪后裂谷期拗陷沉积单元;其主力烃源岩为三叠系页岩及煤层,主要储盖组合为中-上侏罗统砂岩-泥岩,共划分为1个含油气系统和2个成藏组合。根据油藏规模序列法预测,东巴伦支海盆地百万桶以上油气田平均预测值为21个,总可采储量81755百万桶油当量(MMBoe)。

East Barents Basin locates in the Arctic, it is a continental margin rift basin which completely developed fore-rift,syn-rift and post rift sequence and formed on the Baikal-Caledonian basement. The main sedimentary sequence of the basin are Upper Paleozoic Devonian- Carboniferous fore-rift depression sedimentary unit, Permian- Triassic syn-rift sedimentary unit and Late Triassic- Early Tertiary post-rift sedimentary unit, whose main hydrocarbon source rocks are Triassic shale and coal, and main reservoir-seal complex are upper Jurassic sandstone – mudstone that can be divided into one petroleum system and two plays. According to the reservoir trap size sequence method, the East Barents Basin is predicted to contain an average of 21 fields whose oil and gas reserve more than one million barrels, and the total recoverable reserves is 81,755 million barrels of oil equivalent（MMBoe）.