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Experimental Instrument for Physical Analogy of Dual Laterolog

,Ke,S.Z.et al.,  
A scale model for DLL physical analogy is constructed in a laboratry according to the similarity theory of electromagnetic field. The scale model has two parts: a scale model formation and a simulated testing instrument which is composed of a surface instrument, a depth survey system with stepper motor and a microcomputer. The surface instrument contains main current channel, bucking current channel, feedback loop, current measurement channel, two votage measurement channels and checking channel. Under the control of micro-computer, the resistivity of the formation measured is derived from the main current and the midpoint potential of the two monitor electrodes.
【CateGory Index】: P631.819
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