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根据钻井、露头和地震资料分析，按照层序地层学的原理，将塔里木盆地古生界划分为9个层序27个体系域。从层序、体系域的观点出发，层序内的低水位期和高水位期体系域发育有各类砂岩体，形成油气聚集的有利场所。而海进期体系域发育有生油源岩，同时又可成为良好的盖层。因此，一个完整的层序便构成一套生、储、盖组合，形成非构造圈闭。根据各层序、体系域的配置关系，推测塔里木盆地古生界非构造圈闭有利区带有：①寒武系一下奥陶统陆棚斜坡；②中、上奥陶统顶部剥蚀带；③西南拗陷二叠系顶部剥蚀带；④中奥陶统低水位期盆底扇体；⑤上奥陶统低水位期盆底扇体；⑥志留系低水位期贫底扇体；⑦中奥陶统塔中三角洲；⑧中奥陶统英买力南三角洲；⑨石炭系塔中三角洲；⑩石炭系塔北三角洲。
Based on the analysis of drilling, outcrop and seismic data, the Paleozoic in the Tarim Basin is divided into 9 sequences and 27 system domains according to the principle of sequence stratigraphy. From the point of view of sequence and system domain, various sandstone bodies are developed in the system of low water level and high water level in the sequence, forming a favorable place for hydrocarbon accumulation. The marine evolution system developed source rock source rocks, but can also be a good cover. Therefore, a complete sequence constitutes a set of raw, reservoir and cap assemblages forming a non-structural trap. According to the relationship between sequence and system tract, it is speculated that the Paleozoic non-structural traps in the Tarim Basin are characterized by: ① the Cambrian slope of the Ordovician shelf; ② the top of the middle and upper Ordovician denuded zones; ③ Upper Permian dipping system in the southwestern depression; ④ Middle Ordovician basin in the low water level; ⑤ Upper-Ordovician basin in the low water level; ⑥ Silurian low- Ordovician tower Delta; ⑧ Middle Ordovician British Buying Li Delta; ⑨ Carboniferous tower in the delta; ⑩ Carboniferous tower North Delta.