Phase Shift 1
Phase Shift 1 :
(n.) Formation Evaluation. The change in position of the peaks of a sinusoidal electromagnetic wave as it passes through the formation. If the sinusoidal wave picked up by two receivers a certain distance apart in a formation are compared, it is found that the wave has been attenuated and shifted in time. The shift is known as a phase shift. The term is used in particular with reference to thepropagation resistivity log and the electromagnetic propagation log. See: Electromagnetic Propagation Measurement, Phase-Shift Resistivity, Propagation Resistivity Measurement
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