Spontaneous Potential (SP) Log - Petrophysics Blog SP log measures the potential difference in the borehole due to the electrochemical and electrokinetic processes taking place in the formation SP log can therefore be obtained in only conductive media
Spontaneous potential logging - Wikipedia Spontaneous potential log, commonly called the self potential log or SP log, is a passive measurement taken by oil industry well loggers to characterise rock formation properties
Open hole tools - AAPG Wiki Spontaneous potential (SP) is a natural voltage or electrical potential that arises due to differences in the ionic activities (relative saltiness) of the drilling mud and the formation waters
The Defining Series: Basic Well Log Interpretation | SLB The spontaneous potential (SP) log was developed next and was presented along with resistivity logs It is a measurement of the voltage difference between a movable electrode in the wellbore and a fixed electrode at the surface
Geophysical logs - Spontaneous-potential log | U. S . . . Spontaneous-potential logs can be used in the determination of lithology and water quality Collection of spontaneous-potential logs is limited to water- or mud-filled open holes
CLU-IN | Technologies gt; Characterization and Monitoring . . . The spontaneous potential log (incorrectly called self potential) is a record of potentials or voltages that develop at the contacts between shale or clay beds and a sand aquifer, where they are penetrated by a drill hole