Petrophysics MSc Course Notes Introduction Quiz

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What is the primary purpose of using electrical logs in STOOIP calculations?

To determine the fluid compression factors in the reservoir

To calculate the area of the reservoir

To estimate the porosity of the reservoir

To provide information about the reservoir thickness (correct)

How do the electrical properties of a rock affect its electrical response?

The bed resolution and penetration depths of the various tools

The tortuosity of the current flow paths, as described by the formation factor F (correct)

The lithofacies and deltaic cycles recorded by the IES-40

The wireline log characteristics that define the electrofacies

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 (correct)

Electrical logs are only useful for defining electrofacies, which do not include data from other wireline logs

Electrical logs can only be used to identify deltaic cycles, and not other facies types

Electrical logs are not useful for facies recognition, as they only provide information about the reservoir thickness

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 (C) Signup and view all the answers

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 (A) Signup and view all the answers

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 (C) Signup and view all the answers

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 (A) Signup and view all the answers

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 (D) Signup and view all the answers

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 (A) Signup and view all the answers

How does the texture of a rock impact its electrical response?

It affects the tortuosity of current flow paths (C) Signup and view all the answers

What is the primary factor that distinguishes electrofacies, as mentioned in the text?

Different wireline log responses and characteristics (A) Signup and view all the answers

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 (B) Signup and view all the answers

In what way do small-scale deltaic cycles assist in interpreting resistivity logs?

By tracking lithofacies changes (C) Signup and view all the answers

What information can be inferred from the shapes of electrical logs, as discussed in the text?

Differentiate between facies types (C) Signup and view all the answers

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 (B) Signup and view all the answers

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" (A) Signup and view all the answers

How are electrofacies typically differentiated from one another?

'Suites of wireline log responses and characteristics sufficiently different' (C) Signup and view all the answers

Petrophysics MSc Course Notes Introduction Quiz

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