دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the ability to transmit or convey (as heat or electricity). 2. an electricallogging measurement obtained from an induction survey, in which eddy currents produced by an alternating magnetic field induce in a receiver coil a voltage proportionate to the ability of the formation to conduct electricity. See induction log.

n: Measure of the quantity of electricity transferred across unit area per unit potential per unit time. It is the reciprocal of resistivity. Electrolytes may be added to a fluid to alter its conductivity.

dual induction log.

an induction log with dual and deep measurements of resistivity. Shallow measurements are indicative of severely invaded zone and the deepest measurements are most reflective of actual formation fluids.

deep induction log.

medium induction log.

n: see induction survey.

open-hole log that measures resistance difference between formation and wellbore fluids to various depths in the formation.

n: in an induction logging tool, a device that puts out electrical voltage, which is induced in the coil by eddy currents in a formation. The eddy currents are created by a transmi\ter coil on the logging tool. The amount of voltage induced in the receiver coil depends on the conductivity of the formation.

n: 1. The loss in amplitude and change in phase of an electromagnetic field as it penetrates into a conductive medium. In an induction log, the skin effect causes a reduction of the R-signal (in-phase) and an increase in the X-signal (out-of-phase) at the re