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。
By sampling the drill cuttings and using a microcomputer at the well site, the rock drillability can be determined by the energy law measure system.
能量法岩石可钻性测定系统是通过采集钻井井口岩屑并利用微机来测定岩石的可钻性。
Because the formation fluid can not seep in well bore, people find out reservoir usually by cuttings logging, gasometry logging, core analysis, fluorescence etc.
由于地层流体不能进入井筒，过平衡钻井时要确定油气层一般都通过岩屑录井、气测录井、岩心分析、荧光等来实现。
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