ODP Leg 164, Hole 995B - Well Logging Data

Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, gamma radiation, velocity, density, borehole images,…) in any hole depends on the scientific objectives and operational constraints.测井数据为井眼周围地层物理性质的原位实测值，采集时机分为两类：一是取心作业完成后（电缆测井，wireline logging），二是钻进过程中（随钻测井，Logging-While-Drilling，LWD）。任一井眼所采集的数据涵盖的参数类型（包含电阻率、伽马辐射、声波速度、密度、井壁成像测井等），均取决于其科学目标与作业约束条件。