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
Congratulations - you have completed Geophysics 559 (GOPH 559) Midterm.
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Question 1 |
A | low |
B | Not enough information to answer the question. |
C | high |
Question 2 |
A | Critically refracted arrival |
B | Direct wave |
C | Transmitted wave |
D | Refracted arrival |
E | Guided wave |
Question 3 |
A | 1500 m/s |
B | 10 m/s |
C | 4000 m/s |
D | 6000 m/s |
E | 200 m/s |
Question 4 |
A | Latitude and Free Air effects |
B | Slab and Terrain effects |
C | Free Air and Slab effects |
D | Free Air and Terrain effects |
E | Latitude and Slab effects |
Question 5 |
A | Cannot be answered with the given information. |
B | Water |
C | Oil |
D | Gas |
Question 6 |
A | Gravity survey |
B | Seismic interference |
C | None of the above |
D | Magnetic survey |
E | Acoustic impedance |
Question 7 |
A | Oil window |
B | Dry gas preservation limit |
C | Wet gas preservation limit |
D | Oil floor |
Question 8 |
A | 20 - 200 degree Celsius |
B | 50 - 150 degree Celsius |
C | 200 - 350 degree Celsius |
D | 250 - 350 degree Celsius |
E | 0 - 200 degree Celsius |
Question 9 |
A | Speed or velocity |
B | Depth of reflectors |
C | Vibrations |
D | Density of formations |
Question 10 |
A | Density measurements obtained through seismic data. |
B | Advanced well-logging data obtained through a combination of core samples and seismic data. |
C | 2D and 3D structural modeling of the area. |
D | Comprehensive understanding of the regional Geology. |
Question 11 |
A | Having a frequency below the Nyquist value. |
B | Increase in seismic frequency. |
C | Increasing spatial sampling. |
D | Decrease in period. |
Question 12 |
A | Salt |
B | Igneous rocks |
C | Shale |
D | Sandstone |
E | Limestone |
Question 13 |
A | 70 degree Celsius |
B | 200 degree Celsius |
C | 90 degree Celsius |
D | 50 degree Celsius |
E | 150 degree Celsius |
Question 14 |
A | 100 years. |
B | 20 years. |
C | 50 years. |
D | 150 years. |
Question 15 |
A | Deconvolution |
B | Convolution |
C | Normal Moveout |
D | Reciprocity |
Question 16 |
A | less than 5 |
B | less than 40 |
C | greater than 30 |
D | greater than 10 |
E | greater than 50 |
Question 17 |
A | 322.9 Hz |
B | 166.7 Hz |
C | 512.2 Hz |
D | 255.8 hz |
Question 18 |
A | ...similarities between seismic events. |
B | ...frequency (and frequency only). |
C | ...time (and time only). |
D | ...wavelength (and wavelength only). |
Question 19 |
A | Snell's Law |
B | Fermat's Principle |
C | Principle of Reciprocity |
D | Refraction Law |
Question 20 |
A | Buoyancy |
B | Pressure |
C | Gravity |
D | Porosity |
E | Temperature |
Question 21 |
A | A theoretical name given to springs that are not being stretch. |
B | A spring that is under maximum tension (maximum stretch). |
C | A spring that has no length but only diameter. |
D | A theoretical name given to springs that do not obey its spring constant, k. |
E | A theoretical name given to springs that obey its spring constant, k. |
Question 22 |
A | Identification of basement features |
B | Hydrological research (drinking water, fresh water) |
C | Mineral exploration |
D | Oil and gas exploration |
Question 23 |
A | A Geologic area that is capable of containing hydrocarbons due to relatively impermeable barrier. |
B | A body of rock that is capable of containing hydrocarbons due to perfectly impermeable barrier. |
C | A highly conductive (high effective porosity) stratigraphic or a rock body that is capable of containing hydrocarbon. |
D | A specific area of a specific Formation in which the temperature is between 50 - 150 degree Celsius. |
Question 24 |
A | The direct wave travels faster than the head wave. |
B | The head wave only travels in the first medium. |
C | The direct wave has a sinusoidal wave form while the head wave does not. |
D | The head wave travels further than the direct wave, but it has a higher velocity. |
Question 25 |
A | Gravitational and Magnetic forces |
B | Spring Constant and magnitude of gravity |
C | Gravitational and Potential energy |
D | Incident and Refractory rays |
Question 26 |
A | Foliations |
B | Reefs |
C | Faults |
D | Folds |
Question 27 |
A | The location closest to the poles. |
B | The location between the equator and the poles (middle). |
C | The location with the highest elevation and the lowest latitude. |
D | The location closest to the equator. |
E | The location with the lowest elevation and the highest latitude. |
Question 28 |
A | Oil at the very top of the reservoir followed by gas and water as the depth increases. |
B | Gas at the very top of the reservoir followed by oil and water as the depth increases. |
C | A very good reservoir with 100% pure oil and no impurities or other type of fluids. |
D | A very good reservoir with no significant traps. |
Question 29 |
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 30 |
A | Change in density. |
B | Fractures within the formation. |
C | Change in dip angles. |
D | Change in lithology. |
Question 31 |
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 32 |
A | It will be a reduced reading by a factor of 2πGρt. |
B | It will be a increased reading by a factor of 4πGρt. |
C | It will be a increased reading by a factor of 2πGρt. |
D | It will be a reduced reading by a factor of 4πGρt. |
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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.