塔里木盆地中央隆起带演化与奥陶系礁滩储集体

Central Uplift Belt Evolution and Ordovician Reef Bank Reservoir in Tarim Basin

奥陶系生物礁滩是塔里木盆地碳酸盐岩中十分有利的油气储集体。目前已发现的礁滩主要发育在台地边缘相带、台内凸起的缓坡带。巴楚地区生物礁滩沿北东-南西向成群成带分布,总体平行于巴楚断隆与柯坪断隆的构造分界线;塔中地区生物礁滩主要集中于塔中Ⅰ号断裂带的台地边缘带,具有随台缘迁移而变迁的特征;总体上,塔里木盆地奥陶系生物礁滩主要围绕古隆起分布,以台地边缘相为主,随着构造升降,台地边缘相带逐渐向西迁移,礁滩相也随之向西迁移,说明古隆起的演化对礁滩储集体的发育具有明显的控制作用。

The Ordovician reef bank developed in Tarim basin is the quite favorable carbonate reservoir for petroleum exploration. The reef bank in this basin is found mainly in platform margin zone and inner-platform arch ramp zone. The reef bank in Bachu area develops in group along NE-SW, parallel to the tectonic boundary between Bachu uplift and Keping uplift; in Tazhong area it is mainly distributed in platform margin zone in Tazbong No.1 fault belt, with the feature of shifting with the platform margin migration. On the whole, the Ordovician reef bank in Tarim basin is distributed around the ancient uplifts, dominated by platform margin zone. With the tectonism rising and descending, this zone gradually migrates towards west, so does the reef bank zone, too. It is obvious that the ancient uplift evolution is of obvious controlling effect on the development of Ordovician reef bank reservoirs.