Explore the principles of High Resolution Induction Theory, focusing on determining true resistivity of formations, understanding Faraday's and Ampere's laws, and techniques to minimize mutual signals in measurements. Essential for students and professionals in physics and electrical engineering.
Resistivity of a formation is inversely proportional to voltage, and directly proportional to current.
A magnetic field intersecting a coil of wire will induce an alternating voltage in that coil.
Current in a coil of wire creates an electromotive force.
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Low resistivity formations
High resistivity formations
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Proportional
Inversely Proportional
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Subtraction of sonde error from the measurement
The use of multiple transmitter and/or receiver coils.
Measurement of the X-signal in very low resistivity formations
Correction for skin effect in very low resistivity formations
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R-Signal
X-Signal
Mutual Signal
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Underestimated
Overestimated
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R-Signal
X-Signal
Mutual Signal
Taylor Signal
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X-Signal
R-Signal
Mutual Signal
Taylor Signal
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Resistivity of a formation is inversely proportional to voltage, and directly proportional to current.
A magnetic field intersecting a coil of wire will induce an alternating voltage in that coil.
Current in a coil of wire creates an electromotive force.
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Large
Small
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180-degree
270-degree
90-degree
120-degree
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Sonde error
Mutual signal
Skin effect
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True
False
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X-Signal
R-Signal
Mutual Signal
Taylor Signal
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Inversely
Directly
Linearly
Perpendicularly
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17-inches
24-inches
30-inches
39-inches
60-inches
91-inches
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24 inches
30 inches
39 inches
60 inches
91 inches
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24 inches
30 inches
39 inches
60 inches
91 inches
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17-inches
24-inches
30-inches
39-inches
60-inches
91-inches
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Air drilled holes
Oil based mud
Fresh water based mud
Saltwater based mud
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Invaded mud filtrate
Permeability
Formation water resistivity
Borehole resistivity
Shoulder bed resistivity
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Determination of water saturation
Estimation of diameter of invasion
Measure of formation porosity
Qualitative estimation of permeability
Measure resistivity of drilling fluid
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