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从西科1井生物礁-碳酸盐岩的岩心观察和岩石学特征的分析入手,重点刻画了第四系全新-更新统乐东组生物礁-碳酸盐岩的岩石类型和生物礁类型.543片铸体薄片分析和214.89m岩心观察表明:岩石类型主要为粒泥灰岩、泥粒灰岩和骨架灰岩,其次为粘结灰岩、颗粒灰岩、漂砾灰岩和砾屑灰岩.在纵向上,埋深0~10m层段以颗粒灰岩为主,埋深10~22m层段为生物碎屑砂分布段,埋深22.00~214.89m层段以粒泥灰岩、泥粒灰岩和骨架灰岩为主.生物礁类型以骨架礁为主,造礁生物为珊瑚和少量珊瑚藻.骨架礁在埋深0~214.89m均有发育,丛状和块(段)状礁仅分布于埋深83~98m.
Based on the core observation and petrological characteristics of the bio-reef-carbonate rocks in the Well Xike-1, the paper mainly depicts the rock types and reef types of the reef-carbonate reefs in the Quaternary New-Pleistocene Le Dong Formation .543 cast slab analysis and 214.89m core observations show that the rock types are mainly particulate marl, dolomitic limestone and skeleton limestone, followed by bound limestone, particulate limestone, boulder limestone and gravel In the vertical direction, the depth of 0-10 m is dominated by granular limestone, the depth of 10-22 m is the distribution of biological clastic sand, and the depth of 22.00-214.89 m is covered by granular marl, Mudstone and skeleton limestone.The reef types are mainly skeleton reefs, and the reef-forming organisms are coral and a few coral algae.The skeleton reefs are all developed at depths of 0-214.89m, with plexiform and block (section) Reefs only distributed in the depth of 83 ~ 98m.