Drill cuttings are the major material for the studied samples.
研究的材料主要是钻井岩屑样品。
These samples come from drilling mud and cuttings and provide baseline data needed to characterize the well as production begins and comingles all of the microbial DNA.
这些样品主要来自钻井泥浆和岩屑，提供了可以用来描述一口井开始生产时的基准数据，样品中同时混合了所有微生物的DNA。
Mud logs that describe samples of drilled cuttings are taken and recorded on surface.
描述钻井岩屑样品的泥浆测井在地面进行测量和记录数据。
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