桐页1井五峰-龙马溪组页岩特征

Characteristics of Wufeng-Longmaxi Formation Shale in Tongye No.1 Well

黔西北地区五峰-龙马溪组页岩为浅水-深水陆棚相沉积,通过对桐页1井五峰-龙马溪组页岩进行岩心观察和实验测试,发现五峰-龙马溪组具有富有机质页岩TOC含量高、有机质热成熟度高、脆性大、储集物性好、后期易压裂开发等特点,是页岩气聚集的有利层系;但现场解吸实验证明,桐页1井五峰-龙马溪组含气量低,其中保存条件是决定页岩气富集的关键因素。

Shale in Wufeng-Longmaxi formation is a deep-water or shallow-water shelf-facies deposit in northwest Guizhou.Under the observation and experiment of rock core,silicalite shale character with high TOC,high thermal evolution,good reservoir quality,high content of fragile mineral in favor of fracture treatment and can he treated as good accumulation layer of shale gas.But the desorption experiments show that Wufeng-Longmaxi formation of Tongye No.1well is of low gas content,so preservation condition is a key factor in deciding the accumulation of shale gas.