Qbb 3053 - Attributes And 3D Volume Interpretation
Dear Students,
Please find the link for Quiz QBB 3053:https://bit. Ly/2MbhCJ9 Total number of questions: 15 questions Time allotted: 10 minutes for 15 questions You will only have 1 attempt to complete this quiz. Please do not use fake ID. Any attempt of FAKE ID will cause ZERO marks for the whole class.
Thank you and Good Luck.
Luluan Almanna Lubis
Questions and Answers
- 1.
Choose the correct statement of the importance of seismic attributes:
- A.
Seismic attributes give single information about structure only.
- B.
Seismic attributes enable interpreters to extract more information from seismic data.
- C.
Seismic attributes cannot be used as DHI.
- D.
None of the above are correct.
Correct Answer
B. Seismic attributes enable interpreters to extract more information from seismic data.Explanation
Seismic attributes enable interpreters to extract more information from seismic data. This is because seismic attributes are quantitative measurements derived from seismic data that provide additional insights into the subsurface properties. By analyzing these attributes, interpreters can identify and characterize geological features such as faults, fractures, lithology, fluid content, and reservoir properties. This helps in making more accurate interpretations and predictions about the subsurface conditions, which is crucial in various applications like oil and gas exploration, reservoir characterization, and geohazard assessment.Rate this question:
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- 2.
Choose the best seismic attributes to characterize channels:
- A.
Combination of amplitude and phase attributes
- B.
Spectral decomposition
- C.
Combination of sweetness and coherency
- D.
All of the above are correct
Correct Answer
D. All of the above are correctExplanation
All of the mentioned seismic attributes are effective in characterizing channels. The combination of amplitude and phase attributes provides information about the reflection strength and phase shift, which helps in identifying channel boundaries. Spectral decomposition analyzes the frequency content of seismic data and can reveal channel features. The combination of sweetness and coherency attributes helps in identifying the presence and continuity of channels. Therefore, all of these attributes are valid and useful for characterizing channels.Rate this question:
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- 3.
Seismic attributes which is commonly used for characterizing sand quality
- A.
Amplitude
- B.
Phase
- C.
Frequency
- D.
Quality factor
Correct Answer
A. AmplitudeExplanation
Amplitude is a seismic attribute commonly used for characterizing sand quality. It refers to the maximum displacement or distance that a seismic wave moves from its resting position. In the context of sand quality, amplitude can provide valuable information about the thickness and porosity of sand layers, as well as the presence of any fluid-filled reservoirs. By analyzing the amplitude of seismic waves, geoscientists can assess the potential for hydrocarbon reservoirs or other valuable geological formations within the sand.Rate this question:
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- 4.
The seismic polarity used for interpretation
- A.
Minimum phase
- B.
Maximum phase
- C.
Zero phase
- D.
All of the above
Correct Answer
C. Zero phaseExplanation
Zero phase refers to a type of seismic polarity used for interpretation. It means that the seismic wavelet has been shifted in time so that it starts at zero time. This allows for a clearer and more accurate interpretation of seismic data, as it eliminates any phase distortion caused by the earth's layers. By using zero phase, the seismic data can be analyzed more effectively, leading to better understanding of subsurface structures and potential oil and gas reservoirs.Rate this question:
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- 5.
The seismic polarity acquired during seismic acquisition
- A.
Minimum phase
- B.
Maximum phase
- C.
Zero phase
- D.
All of the above
Correct Answer
A. Minimum phaseExplanation
Minimum phase refers to a type of seismic wavelet that has a specific phase characteristic. In the context of seismic acquisition, it means that the acquired seismic data has been processed in a way that preserves the minimum phase nature of the wavelet. This is important because minimum phase data allows for accurate imaging and interpretation of subsurface structures. By preserving the minimum phase, the seismic data retains the original timing and amplitude information, resulting in a clearer and more reliable representation of the subsurface. Therefore, the correct answer is minimum phase.Rate this question:
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- 6.
The information below are the basic properties of 3D seismic dataset, EXCEPT
- A.
Inline
- B.
Crossline
- C.
Time Slice
- D.
Horizon slice
Correct Answer
D. Horizon sliceExplanation
The given options are all basic properties of a 3D seismic dataset, except for "Horizon slice". Inline, crossline, and time slice are commonly used terms in seismic data analysis, while a horizon slice refers to a specific depth or geological horizon within the dataset.Rate this question:
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- 7.
Spectral decomposition techniques are derived based on:
- A.
Phase
- B.
Sweetness
- C.
Amplitude
- D.
Frequency
Correct Answer
D. FrequencyExplanation
Spectral decomposition techniques are derived based on frequency. Frequency refers to the number of cycles of a wave that occur in a given time period. Spectral decomposition involves breaking down a signal or waveform into its constituent frequencies, allowing for analysis and understanding of the different frequency components present. By studying the frequency content of a signal, spectral decomposition techniques can provide valuable insights into various phenomena, such as the composition of sound, the behavior of electromagnetic waves, or the characteristics of vibrations.Rate this question:
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- 8.
The seismic data frequencies are usually ranging between:
- A.
10 – 80 KHz
- B.
100 – 800 KHz
- C.
10 – 80 Hz
- D.
5 – 10 Hz
Correct Answer
C. 10 – 80 HzExplanation
The correct answer is 10 - 80 Hz. Seismic data frequencies typically range between 10 and 80 Hz. Seismic data is used to study the Earth's subsurface and detect underground structures and resources. Low frequencies, such as 10 - 80 Hz, are commonly used because they can penetrate deep into the Earth and provide detailed information about the subsurface. Higher frequencies, like 100 - 800 KHz, are more suitable for shallow subsurface imaging.Rate this question:
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- 9.
Choose the correct answer of seismic resolution if the wavelength is 40 meters
- A.
20 m
- B.
10 m
- C.
12.5 m
- D.
160 m
Correct Answer
B. 10 mExplanation
Seismic resolution refers to the ability of a seismic survey to distinguish between two separate subsurface features. It is directly related to the wavelength of the seismic waves used in the survey. The shorter the wavelength, the higher the resolution. In this case, the given wavelength is 40 meters. Among the options provided, the shortest wavelength is 10 meters. Therefore, the correct answer for seismic resolution with a 40-meter wavelength would be 10 meters.Rate this question:
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- 10.
Choose the correct steps to perform geo-body:
- A.
Extraction – identification – isolation
- B.
Isolation – identification - extraction
- C.
Identification – Isolation – extraction
- D.
Extraction – isolation - identification
Correct Answer
C. Identification – Isolation – extractionExplanation
The correct steps to perform geo-body are identification, isolation, and extraction. This means that first, we need to identify the geo-body, then isolate it, and finally extract it. This sequence ensures that the geo-body is properly identified before any further actions are taken, and that it is safely isolated before extraction to prevent any contamination or damage.Rate this question:
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- 11.
Choose the INCORRECT statement about horizon flattening
- A.
Help interpreters to analyze the subsurface
- B.
A technique to replace advance stratigraphic interpretation
- C.
Not a replacement for advanced stratigraphic interpretation
- D.
Attempts to reverse the effects of geologic processes
Correct Answer
B. A technique to replace advance stratigraphic interpretationExplanation
The correct answer is "A technique to replace advance stratigraphic interpretation". This means that horizon flattening is not a technique that can entirely replace advanced stratigraphic interpretation. Instead, it is a method that helps interpreters analyze the subsurface by attempting to reverse the effects of geologic processes.Rate this question:
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- 12.
Choose the conditions to performs horizon flattening
- A.
The seabed is not assumed as flat through time
- B.
Compaction effects are incorporated in the technique
- C.
Velocity effects are incorporated in the technique
- D.
None of the above
Correct Answer
D. None of the aboveExplanation
The conditions to perform horizon flattening are not mentioned in the given options. The options provided discuss assumptions and effects that are incorporated in the technique, but none of them specifically address the conditions required for horizon flattening. Therefore, the correct answer is "None of the above".Rate this question:
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- 13.
The ant tracking can assist interpreters in
- A.
Major faults interpretation
- B.
Fractures patterns
- C.
Faults patterns
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
The ant tracking technique can be used to assist interpreters in interpreting major faults, fractures patterns, and faults patterns. This technique involves analyzing the movement and behavior of ants within a geological formation to identify and understand the structure and patterns of faults and fractures. By observing the paths taken by the ants, interpreters can gain insights into the location and nature of faults and fractures, helping them in their interpretation of geological formations. Therefore, the correct answer is "All of the above".Rate this question:
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- 14.
Steps to perform ant-tracking are
- A.
Pre-processing – parameter definition – automatic extraction – surface edition
- B.
Parameter definition - Pre-processing – automatic extraction – surface edition
- C.
Pre-processing – automatic extraction – parameter definition – surface edition
- D.
Automatic extraction – pre-processing – parameter definition –surface edition
Correct Answer
A. Pre-processing – parameter definition – automatic extraction – surface editionExplanation
The correct sequence of steps to perform ant-tracking is pre-processing, parameter definition, automatic extraction, and surface edition. This means that the first step is pre-processing, which involves preparing the data for analysis. Then, parameter definition is done to define the variables and parameters that will be used in the analysis. After that, automatic extraction is performed to extract relevant information from the data. Finally, surface edition is done to make any necessary adjustments or edits to the results.Rate this question:
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- 15.
Which seismic attribute that can be used to interpret geological structures
- A.
Amplitude
- B.
Travel time
- C.
Frequency
- D.
Phase
Correct Answer
D. PhaseExplanation
Phase is a seismic attribute that can be used to interpret geological structures. It refers to the relationship between the arrival times of seismic waves at different receivers. By analyzing the phase differences, geologists can determine the subsurface structures and identify faults, fractures, and other geological features. The phase information helps in mapping the subsurface and understanding the geological processes that have shaped the area.Rate this question:
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