Q. Which one of the following well log responses characterizes an overpressured zone in the subsurface? A. High velocity and high resistivity. B. Low velocity and low density. C. High velocity and low resistivity. D. Low velocity and high density. Ans: Low velocity and low density.
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Q. Assertion (a): The Static Self-Potential for a thick, clean freshwater bearing sandstone formation is positive. Reason(r): Resistivity of the formation water is less than the resistivity of salt water mud- filtrate. A. Both (a) and (r) are true and (r) is the correct reason for (a). B. ...
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Q. The frequencies of the primary magnetic field generated by worldwide thunderstorm activity vary in the range (A) 10-6 Hz -10-3 Hz (B) 10-3 Hz -1 Hz (C) 1 Hz -103 ...
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Q. The effect of small scale near surface inhomogeneities can be removed from magnetic data by A. upward continuation. B. downward continuation. C. second vertical derivative. D. reduction to pole. Ans: upward continuation.
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Q. Dip angle electromagnetic response measured along a profile over multiple conductors is shown in the figure below. Which of the crossover points P, Q and R represent the CORRECT locations of conductors beneath them? A. P, Q and R B. Q and R C. P and R D. P and Q Ans: P and R
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Q. Multi-electrode resistivity survey is carried out by placing 10 equispaced electrodes (denoted by arrows in the figure below) on the surface of the earth. The points of observations in the distance-apparent depth plane are marked as solid dots in the figure shown below. Considering the ...
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Q. There is a change in the values of the bulk modulus and density across the Gutenberg discontinuity (from mantle to outer core). Which one of the following statements is CORRECT? A. Both bulk modulus and density increase. B. Both bulk modulus and density decrease. C. Bulk modulus ...
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Q. Figure 1 is a schematic diagram of four seismic events in t-x (time-offset) domain and Figure 2 is the result of transformation from t-x domain to f-kx (frequency-horizontal wavenumber) domain. Match the events in t-x domain in Figure 1 with their counterparts in f-kx domain in Figure 2. ...
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Q. Which one of the following rock types has the highest bulk magnetic susceptibility value? A. Gabbro B. Marble C. Orthoquartzite D. Limestone Ans: Gabbro
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Q. The impulse response of the Kirchhoff pre-stack time migration operator for non-zero offsets in a homogeneous and isotropic medium is (A) a circle. (B) a parabola. (C) a hyperbola. (D) an ellipse. ...
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Q. The maximum number of linearly independent rows of an m × n matrix G where m > n is (A) m. (B) n. (C) m – n. (D) 0. Ans: n
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Q. The value of Eh corresponding to the upper limit of natural surface aqueous environment at pH of 8.0 is ____________V. Ans: 0.7-0.8
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