دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Schlumberger wireline tool that records a Spontaneous Potential log and three resistivity curves at different depths. Used to deduce true formation resistivity Rt, invasion profiles and quicklook Hydrocarbon detection.

see Spontaneous Potential Log or SP.

abbr: spontaneous potential or selfpotential.

spontaneous potential log.

n: (SP) a record of a spontaneous potential curve.

One of the oldest and simplest logs. Measures voltage between formations and the fluid in the wellbore. Potential differences arise due to the differences between salinity of the formation and the wellbore fluids. SP is used for qualitative permeability,