Instructions:1. Time given is 40 minutes (considering you have 40 questions to answer). 2. There are 40 questions: 20 MCQ and 20 True/False. 3. Please be honest, and not to google for answer. 4. Good luck, and all the best.
Enhancing velocity information of subsurface.
Correct apparent reflector position that was obtained in pre-processing data.
Removing the effect of noise and multiples from the seismic data.
As a connector to Geology-Geophysics sequence (G&G Link).
Wavenumber.
Bulk Modulus.
Frequency.
Velocity.
Wave move in plane and only able to travel in a straight line.
Wave can either be reflected and or refracted only.
Wave can be attenuated by any factor.
The wave movement is a process of heat transfer.
An algorithm used to convert time domain data to Fourier domain.
An algorithm function that turns frequency data into sinusoidal waves.
A transform used in engineering for complex number arithmetic.
Mathematical tool that shows us how to deconstruct the waveform into its sinusoidal components.
Reflected Shear wave.
Transmitted Shear wave.
Reflected Surface wave.
Reflected Pressure wave.
Scholte wave > S-wave > Rayleigh wave > Love wave.
P-wave > S-wave > Love wave > Rayleigh wave.
P-wave > Love wave > Rayleigh wave > S-wave.
P-wave > Stoneley wave > S-wave > Scholte wave.
Surface Waves.
P-Waves.
S-Waves.
Converted Waves.
Absorption.
Geometrical Spreading.
Multiples.
Scattering.
Better inversion result using Full Waveform Inversion technique.
Improve seismic resolution of thin beds.
Enhance seismic image during seismic migration.
Reduce Fresnel zone for better 3D migration.
I, ii and iv.
I, ii and iii.
I, iii and iv.
Ii, iii and iv.
Non-Hyperbolic.
Amplitude decays exponentially from apex.
Phase is asymmetrical.
Frequency attenuated with depth.
Every point is the source of a secondary wave front.
These secondary wave front can propagate upward or downward.
Amplitude & phase in secondary wave front is same as the primary wave front.
The superposition of these secondary wave front will create a new wave front.
Velocity changing linearly with depth.
Interval velocity changing with time.
Velocity function of frequency.
Phase change according to velocity.
A type of body wave.
Found at solid-solid interface.
Can be derived from Rayleigh wave.
Have a speed close to P-wave velocity.
Same irrespective of depth.
Narrower as depth increase.
Broader as depth increase.
Shorter as depth increase.
Better resolution
Poor imaging
Poor resolution
Better signal to noise ratio
Delay in phase of seismic signal.
Wave propagate scattered away from receiver.
Increase in signal frequency.
Constant seismic signal amplitude.
The wave field imaginary solution cannot be remove through kz solution.
The evanescent wave energy decay linearly from the source
The wave field cannot be reconstructed for measurement at far-field.
The far field wave energy is consider relevant.
By taking a Fourier transform from time domain to frequency domain.
By incorporating imaginary solution to wave equation.
By taking into account the elastic component of the seismic wave.
By taking a high frequency approximation to the wave equation.
Principle of Superposition
Rayleigh Integral.
Gauss Theorem
Green's Function
True
False
True
False
True
False
True
False
True
False