37 Questions
What is the first main stage in an inversion project?
Data Preparation
Which of the following is NOT a part of the Inversion Preparation stage?
Data gathering
What does the Data Preparation phase involve?
Gathering, organizing, and pre-processing required data
Which stage involves ensuring the suitability of seismic inversion for the project's objectives?
Feasibility studies
During which stage are inversion parameters tested?
Inversion phase
What is one of the tasks involved in the Inversion Preparation stage?
Low Frequency Model construction
What phenomenon causes reflections to undergo constructive interference at a spacing of less than one-quarter of the wavelength?
The tuning effect
Why is it important to know the bed thickness at which two events become indistinguishable in time?
To study thin reservoirs
What is a crucial stage in any inversion project that involves uploading data and ensuring data quality?
Data preparation
What is mandatory for an inversion project, along with elastic properties and seismic data?
Petrophysical logs
Before running an inversion, what can be used to check if the inversion will be able to achieve the project objectives?
Forward modeling and well data
What type of inversion is best suited to achieve the objectives of a project?
The most appropriate type after considering project goals
What is a common issue that may arise due to different logging runs covering different depths?
Depth shifts between logs
In well conditioning, what kind of borehole condition can produce low density values and data spikes?
Borehole washout
Why is it important to check for crossing horizons in horizon conditioning?
To avoid holes or decimated horizon picks
What is the main objective of reservoir-oriented seismic conditioning?
To optimize AVO response
What type of seismic data preconditioning is essential after migration to avoid wrong estimation of reservoir properties?
To remove residual moveout
What is the purpose of random noise attenuation in seismic data processing?
To remove incoherent noise for better interpretation
In the context of seismic inversion, why is it important to cross-plot elastic properties computed from well logs?
To separate different fluids and lithologies
What is the significance of Vp/Vs property in relation to P-impedance when cross-plotting well log data?
Vp/Vs requires shear wave information for separation
What is the main purpose of forward modeling in AVO understanding?
To generate different scenarios of elastic properties
How does polarity affect seismic interpretation?
Polarity conventions vary geographically and among oil companies
Why is projective filtering carried out in the f-x domain in seismic data processing?
To improve coherence of seismic data
What do synthetic gathers help achieve in AVO analysis?
Analyze fluid content scenarios
What is the first step in the data preparation stage of the Seismic Inversion Workflow?
Load wells
Why is it important to verify the quality and characteristics of available data before inversion processing?
To check if desired inversion can be achieved with the data
What role does AVO understanding play in seismic inversion?
AVO understanding assists in generating different scenarios of elastic properties for fluid content analysis.
Which type of well data is essential for well-to-seismic tying and wavelet estimation in a seismic inversion project?
Well markers data
What is the significance of North American convention in the context of zero-phase wavelet?
North American convention uses SEG normal polarity for impedance increases.
Why are seismic velocities highly recommended data for building the initial model in a seismic inversion project?
To assist in time to depth conversion
What is a key purpose of conducting quality control processes on well logs before starting a seismic inversion project?
To calibrate the inversion
Which well logs are recommended for typical quality control checks at the start of a seismic inversion project?
Resistivity logs
Why is it important to have a spatial map display in well quality control processes at the start of a project?
To ensure correct sub-surface positioning of data points
Which type of information is derived directly from well logs in a seismic inversion project?
Wavelet estimation operator
In seismic inversion, what do elastic logs, check shot data, and well markers contribute to?
Building the initial model
What is a main requirement for quality control and calibration of the inversion in a seismic project?
Understanding applied processing to input seismic
Why is it necessary to gather all necessary data for a seismic inversion project?
To ensure correct wells geometry and positioning
Learn about common issues encountered with well log conditioning, such as missing log coverage and bad borehole conditions. Understand methods for estimating missing elastic logs and improving well log quality.
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