Apparat og fremgangsmåte for bestemmelse og avbilding av borehullsresistivitet ved å anvende kapasitiv kopling

Apparat og fremgangsmåte for bestemmelse og avbilding av borehullsresistivitet ved å anvende kapasitiv kopling

An apparatus for obtaining resistivity parameters of earth formations (7) uses capacitive coupling (5) for injecting measure currents into the formation through a nonconducting mud. In one embodiment, a modulated electrical current is used. Alternatively, multifrequency measurements may be made to o...

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Hauptverfasser: Burt, Andrew Richard, Tabarovsky, Leonty Abraham, Alexy, Albert A, Evans, Martin Townley
Format: Patent
Sprache:nor
Schlagworte:
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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creator Burt, Andrew Richard
Tabarovsky, Leonty Abraham
Alexy, Albert A
Evans, Martin Townley
description An apparatus for obtaining resistivity parameters of earth formations (7) uses capacitive coupling (5) for injecting measure currents into the formation through a nonconducting mud. In one embodiment, a modulated electrical current is used. Alternatively, multifrequency measurements may be made to obtain the resistivity parameter. In an optional embodiment, the modulation frequency is in the AF range, making it possible to use prior art circuitry designed to reduce cross talk. Measurements may be made either on a wireline or in a MWD configuration.
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subjects DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
title Apparat og fremgangsmåte for bestemmelse og avbilding av borehullsresistivitet ved å anvende kapasitiv kopling
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