数据库系统实现日志主要有三种格式，逻辑日志(logical logging)，物理日志(physical logging)，物理逻辑日志(physiological logging)，而对于redo日志，则主要采用物理日志和物理逻辑日志两类。
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Logging physical 物理性检查层
Geology of coalfield geophysical logging is a discipline which USES the data of coalfield logging and others like the experimental data on rock physical properties to solve the geological problems.
煤田测井地质学是利用煤田测井资料，包括各种岩石物理实验资料及其方法解决地质问题的科学。
The physical fundamentals of electromagnetic wave imaging logging in multiphase flow deal with the wave propagating characteristics and the fluid electromagnetic properties in oil wells.
研究多相流动电磁波成像测井要涉及到两个物理基础问题：一是油井中电磁波的传播特性，二是油井中流体介质的电磁性质。
NMR (Nuclear Magnetic Resonance) logging technology is mainly used for quickly and accurately analyzing physical parameters of core, cuttings and the sidewall core on drilling site.
核磁共振录井技术主要用于在钻井现场快速、准确地分析岩心、岩屑和井壁取心的物性参数。
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