泥晶（micrite）又称灰泥，是异化颗粒同时沉积充填于粒屑间的化学、物理、生物化学沉积作用形成的碳酸盐沉积物，颗粒一般小于4微米。
机械成因的泥晶碳酸盐岩则具泥屑结构。
The micritic carbonate rocks of mechanical origin have mud-debris structure.
岩性以泥晶灰岩为主，并且物性随白云岩含量的增多会变好；
Its lithology is primarily argillaceous limestone, and the physical property can improve along with dolomite content's increasing;
下古生界储层主要以马家沟组的泥晶白云岩和粉晶白云岩为主。
The Lower Paleozoic reservoir is Majiagou formation's putty crystal dolomite and powder crystal dolomite primarily.
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