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四川盆地志留系在加里东运动抬升剥蚀中仅残留下统地层，文章旨在研究其层序特征，指出有利勘探区。应用层序地层学方法，识别志留系进行层序界面，划分划分出5个层序、10个体系域，建立等时地层格架，分析储集层展布规律。志留系层序由加积—退积的准层序组构成海侵体系和加积—进积的准层序组构成的高位体系域组成。储集岩有滨岸砂坝相的砂质岩和生物礁及生物浅滩碳酸盐岩，川东以“小河坝砂岩”碎屑岩储集层为主；川南以生物礁及生物浅滩灰岩储集层为主。

SILURIAN SEQUENCE STRATIGRAPHY AND FAVORABLE RESERVOIR DISTRIBUTION IN SICHUAN BASIN

Because of uplifting by Caledonian movement, most of the Silurian had been denuded and only its Lower Series remained in Sic huan Basin. In order to identify the Silurian, 5 sequences and 10 system tracts were divided up by use of sequence stratigraphic method and the reservoir distr ibution law was analyzed by setting up isochronous formation framework. The Silu rian sequence is composed of the transgressive system tracts comprised by the ag gradation-retrogradation parasequence sets and of the high system tracts compri sed by the aggradation-progradation parasequence sets. The reservoir rocks incl ude the sandy rocks of coastal sandbar facies and the carbonate rocks of bioherm al-biologic shoal facies. The clastic rock reservoirs of Xiaoheba sandstones is in the majority in East Sichuan and the biohermal-biologic shoal limestone res ervoirs in South Sichuan.