Geophysics 559-Geophysical Interpretation
In class midterm will be mostly multiple choice; but there will be also written questions.
Disclaimer: While every reasonable effort is made to ensure that the information provided is accurate, no guarantees for the currency or accuracy of information are made. It takes several proof readings and rewrites to bring the quiz to an exceptional level. If you find an error, please contact me as soon as possible. Please indicate the question ID-Number or description because server may randomize the questions and answers.
Geophysics 559 (GOPH 559) Midterm
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Question 1 |
A | 512.2 Hz |
B | 255.8 hz |
C | 166.7 Hz |
D | 322.9 Hz |
Question 2 |
A | Latitude and Free Air effects |
B | Free Air and Slab effects |
C | Free Air and Terrain effects |
D | Latitude and Slab effects |
E | Slab and Terrain effects |
Question 3 |
A | 200 m/s |
B | 4000 m/s |
C | 10 m/s |
D | 6000 m/s |
E | 1500 m/s |
Question 4 |
A | The head wave travels further than the direct wave, but it has a higher velocity. |
B | The direct wave travels faster than the head wave. |
C | The head wave only travels in the first medium. |
D | The direct wave has a sinusoidal wave form while the head wave does not. |
Question 5 |
A | Acoustic impedance |
B | Seismic interference |
C | None of the above |
D | Magnetic survey |
E | Gravity survey |
Question 6 |
A | Comprehensive understanding of the regional Geology. |
B | 2D and 3D structural modeling of the area. |
C | Advanced well-logging data obtained through a combination of core samples and seismic data. |
D | Density measurements obtained through seismic data. |
Question 7 |
A | A Geologic area that is capable of containing hydrocarbons due to relatively impermeable barrier. |
B | A specific area of a specific Formation in which the temperature is between 50 - 150 degree Celsius. |
C | A body of rock that is capable of containing hydrocarbons due to perfectly impermeable barrier. |
D | A highly conductive (high effective porosity) stratigraphic or a rock body that is capable of containing hydrocarbon. |
Question 8 |
A | ...time (and time only). |
B | ...frequency (and frequency only). |
C | ...wavelength (and wavelength only). |
D | ...similarities between seismic events. |
Question 9 |
A | Temperature |
B | Buoyancy |
C | Porosity |
D | Pressure |
E | Gravity |
Question 10 |
A | 50 - 150 degree Celsius |
B | 250 - 350 degree Celsius |
C | 20 - 200 degree Celsius |
D | 0 - 200 degree Celsius |
E | 200 - 350 degree Celsius |
Question 11 |
A | The location with the highest elevation and the lowest latitude. |
B | The location closest to the equator. |
C | The location with the lowest elevation and the highest latitude. |
D | The location between the equator and the poles (middle). |
E | The location closest to the poles. |
Question 12 |
A | Decrease in period. |
B | Increase in seismic frequency. |
C | Having a frequency below the Nyquist value. |
D | Increasing spatial sampling. |
Question 13 |
A | Refracted arrival |
B | Guided wave |
C | Direct wave |
D | Transmitted wave |
E | Critically refracted arrival |
Question 14 |
A | Faults |
B | Foliations |
C | Reefs |
D | Folds |
Question 15 |
A | Mineral exploration |
B | Oil and gas exploration |
C | Identification of basement features |
D | Hydrological research (drinking water, fresh water) |
Question 16 |
A | Not enough information to answer the question. |
B | high |
C | low |
Question 17 |
A | A spring that has no length but only diameter. |
B | A theoretical name given to springs that are not being stretch. |
C | A spring that is under maximum tension (maximum stretch). |
D | A theoretical name given to springs that obey its spring constant, k. |
E | A theoretical name given to springs that do not obey its spring constant, k. |
Question 18 |
A | Convolution |
B | Deconvolution |
C | Reciprocity |
D | Normal Moveout |
Question 19 |
A | A very good reservoir with no significant traps. |
B | A very good reservoir with 100% pure oil and no impurities or other type of fluids. |
C | Gas at the very top of the reservoir followed by oil and water as the depth increases. |
D | Oil at the very top of the reservoir followed by gas and water as the depth increases. |
Question 20 |
A | It depends on the rock type and the formation. |
B | Along the plane of the fractures. |
C | Along any angle between the fractures and natural permeability pathways. |
D | Across or perpendicular to fractures. |
Question 21 |
A | Principle of Reciprocity |
B | Snell's Law |
C | Fermat's Principle |
D | Refraction Law |
Question 22 |
A | Limestone |
B | Salt |
C | Shale |
D | Igneous rocks |
E | Sandstone |
Question 23 |
A | Fractures within the formation. |
B | Change in density. |
C | Change in dip angles. |
D | Change in lithology. |
Question 24 |
A | Water |
B | Oil |
C | Gas |
D | Cannot be answered with the given information. |
Question 25 |
A | Wet gas preservation limit |
B | Oil floor |
C | Oil window |
D | Dry gas preservation limit |
Question 26 |
A | effect that the distance between a seismic source and a receiver (the offset) has on the arrival time of a reflection. |
B | density contrast between two layers adjacent to each other. |
C | reduction of seismic resolution as a result of smaller variation in densities of different layers and the depth to the reflection surface. |
D | resolution of layers with extremely small difference in densities. |
Question 27 |
A | 90 degree Celsius |
B | 200 degree Celsius |
C | 50 degree Celsius |
D | 70 degree Celsius |
E | 150 degree Celsius |
Question 28 |
A | less than 5 |
B | greater than 10 |
C | greater than 30 |
D | greater than 50 |
E | less than 40 |
Question 29 |
A | Incident and Refractory rays |
B | Gravitational and Magnetic forces |
C | Spring Constant and magnitude of gravity |
D | Gravitational and Potential energy |
Question 30 |
A | 100 years. |
B | 20 years. |
C | 50 years. |
D | 150 years. |
Question 31 |
A | It will be a reduced reading by a factor of 4πGρt. |
B | It will be a increased reading by a factor of 4πGρt. |
C | It will be a reduced reading by a factor of 2πGρt. |
D | It will be a increased reading by a factor of 2πGρt. |
Question 32 |
A | Depth of reflectors |
B | Density of formations |
C | Speed or velocity |
D | Vibrations |
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Credits: Based on the excellent class notes provided by, Dr. Laurence Lines during Winter 2015.
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Given the faulted slab equation, , prove that the edge of the buried slab occurs at the inflection point of the gravitational profile curve.