17 Questions
What is the primary purpose of using electrical logs in STOOIP calculations?
To provide information about the reservoir thickness
How do the electrical properties of a rock affect its electrical response?
The tortuosity of the current flow paths, as described by the formation factor F
What is the relationship between electrical logs and facies recognition?
Electrical logs can be used to distinguish between different facies types, similar to how sonic and gamma ray logs are used
What is the purpose of the term "electrofacies" as mentioned in the text?
It defines suites of wireline log responses that are sufficiently different to be separated from other electrofacies
What is the significance of the small-scale deltaic cycles shown in Figure 19.27?
They illustrate how electrical logs can be used to distinguish different facies types
What is the main factor that determines the electrical response of a rock, according to the text?
The tortuosity of the current flow paths, as described by the formation factor F
What is the relationship between electrical logs and other types of wireline logs, as mentioned in the text?
The wireline log characteristics that define a particular electrofacies will include data from logs other than just electrical logs
What is the main purpose of the IES-40 tool mentioned in the text?
To track changes in lithofacies and record small-scale deltaic cycles
How do the various logging tools mentioned in the text affect the interpretation of electrical logs?
The bed resolution and penetration depths of the tools determine how well the log can respond to changes in the rock at various scales
How does the texture of a rock impact its electrical response?
It affects the tortuosity of current flow paths
What is the primary factor that distinguishes electrofacies, as mentioned in the text?
Different wireline log responses and characteristics
How do wireline logs contribute to distinguishing different facies types, according to the text?
By providing suites of log responses sufficiently distinct to differentiate facies
In what way do small-scale deltaic cycles assist in interpreting resistivity logs?
By tracking lithofacies changes
What information can be inferred from the shapes of electrical logs, as discussed in the text?
Differentiate between facies types
How do changes in bed resolution and penetration depths affect the responsiveness of logging tools?
They impact how well logs respond to variations in different scales
What defines an electrofacies, according to Rider as mentioned in the text?
"Suites of wireline log responses and characteristics sufficiently different to be able to be separated from other electrofacies"
How are electrofacies typically differentiated from one another?
'Suites of wireline log responses and characteristics sufficiently different'
Test your knowledge on main sources of data concerning sub-surface rocks according to Dr. Paul Glover's Petrophysics MSc course notes.
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