Question

Match the well logging methods in GROUP I with their corresponding measured parameters in GROUP II: 

• A. P – IV; Q – I; R – II; S – III
• B. P – II; Q – IV; R – I; S – III
• C. P – II; Q – III; R – I; S – IV
• D. P – III; Q – IV; R – I; S – II

Hint:

In well logging, understanding the physical principles behind each method helps in identifying the correct parameters being measured. For example, neutron logs are related to hydrogen ion concentration, and density logs to electron density.

Answer 1

The Correct Option is B

We need to match the well logging methods from GROUP I with their corresponding measured parameters from GROUP II. Let’s analyze each well logging method:
- (P) Neutron log: This method is primarily used to measure the hydrogen ion concentration in the formation. This corresponds to (II) in GROUP II.
- (Q) Density log: This log measures the electron density of the formation, which is typically associated with (IV) in GROUP II.
- (R) Microspherically Focused Log (MSFL): This method is used to measure resistivity in the flushed/invaded zone, which corresponds to (I) in GROUP II.
- (S) Sonic log: This log measures the interval transit time of a compressional wave, which corresponds to (III) in GROUP II.
Therefore, the correct matching is:
P – II; Q – IV; R – I; S – III.