DSDP Leg 64, Hole 478 - 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（Logging data）是对井眼周围地层物理性质的原位测量，可在取芯作业完成后通过电缆测井（wireline logging）采集，或在钻井过程中通过随钻测井（Logging-While-Drilling, LWD）获取。任意一口井的测井数据所涵盖的参数类型（电阻率（resistivity）、伽马辐射（gamma radiation）、声波速度（velocity）、密度（density）、井眼成像（borehole images）等），均取决于该井的科学目标与作业约束条件。