为封堵地层或保护某些层段在井内套管外面所用的装置。
A device used on the outside of the casing of a well to seal off formations or to protect certain zones.
通过对该地层中岩石特征及沉积环境等方面的分析，认为该区在研究层段内属于碳酸盐台地相。
According to the analysis of rocks features and sedimentary environment, the section pertains to carbonate tableland facies.
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