CPG Quality Control & Process Improvement 3

Question 1

Which Lean manufacturing concept focuses on eliminating waiting time between process steps in a petroleum laboratory workflow?

Accepted Answer

Flow

Answer

Flow, a core Lean principle, aims to make work move smoothly through each step without queuing or delay between process stages.

Question 2

During well log quality control, a geologist notices a caliper log shows enlarged borehole sections. What is the primary QC concern for other logs in those intervals?

Accepted Answer

Degraded resistivity and density log accuracy caused by poor pad contact or invasion

Answer

In washed-out borehole sections, contact-dependent tools like density and microresistivity lose pad contact, producing unreliable measurements.

Question 3

What is the key distinction between precision and accuracy in analytical quality control?

Accepted Answer

Accuracy measures closeness to the true value; precision measures repeatability of results

Answer

Accuracy describes how close a measurement is to the true value, while precision describes how reproducible repeated measurements are.

Question 4

In a mud logging QC program, which parameter most directly confirms that lag depth corrections are applied correctly?

Accepted Answer

Correlation of gas peaks with formation tops from offset wells

Answer

Gas peaks that align with known formation tops from offset wells confirm that lag time and lag depth corrections are being applied accurately.

Question 5

A value stream map in petroleum project management is primarily used to:

Accepted Answer

Identify waste and non-value-adding steps across an entire workflow

Answer

Value stream mapping visualizes every step in a process to distinguish value-adding activities from waste such as waiting, rework, and overproduction.

(CPG) Certified Petroleum Geologist Practice Test

(CPG) Certified Petroleum Geologist Practice Test

CPG Quality Control & Process Improvement 3