The high quality sand-body trap is characteristic of a large-scale trap, having furthersome types of reservoir facies and favorable reservoir, which are key factors for hydrocarbon enrichment.
优质的砂岩体圈闭具有圈闭规模大、发育有利的储集相类型和良好储集层的特点，这些是油气富集的关键因素。
2
Gucheng Ordovician reef beach facies lithostratigraphic trap zone and Luobupo Ordovician reef beach facies structure-lithostratigraphic trap zone.
古城奥陶系礁滩相岩性圈闭带和罗布泊奥陶系礁滩相构造—岩性复合圈闭带。
3
Investigation shows that an exceptionally big oolitic beach reservoir with massive thickness could be found out in the deep trap of oolitic beach facies on the west platform edge of the plateau.