Geology and Geophysics
GATE GG-1 Principles and applications of gravity, magnetic, electrical, electromagnetic, seismic and radiometric methods of prospecting for oil, mineral and ground water; introductory well logging PYQs
Build your understanding with focused practice from past exam papers.
Questions 31–36 of 36. Imported answers require independent review unless marked reviewed.
Question 21
Open questionPART-AMCQ1 markNeeds review
Which one of the following corrections is always added during reduction of the observed gravity data?
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Open questionPART-ANAT1 markNeeds review
Given that the velocity of P-waves in a sandstone matrix is 5600 m/s and that in oil is 1200 m/s, the velocity of P-wave propagation in oil saturated sandstone with 30% porosity is ________ m/s. (Use Wyllie time average equation.)
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Open questionGG-CMCQ1 markNeeds review
Match the geophysical terms in Group-I with their corresponding units of measurements in Group-II.
Group-I
P. Transit time
Q. Conductivity
R. Gravity anomaly
S. Magnetic field intensity
Group-II
mGal
nanoTesla
siemens
millivolt
microsecond per feet
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Open questionGG-CMCQ1 markNeeds review
The Maxwell’s equation based on Ampere’s law is
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Open questionGG-CMCQ1 markNeeds review
A seismic refraction survey was carried out over a subsurface consisting of a stack of horizontal isotropic layers. In the common midpoint (CMP) domain, the moveout (traveltime v/s offset) curve for any primary reflection event is best approximated by
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Open questionGG-CMCQ1 markNeeds review
Which one amongst the following logging tools has the largest depth of investigation?
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