CPG Research Methods & Evidence-Based Practice 2

Question 1

Which statistical method is most appropriate for identifying the relationship between porosity and permeability in a large core dataset?

Accepted Answer

Linear regression analysis

Answer

Linear regression analysis quantifies the relationship between two continuous variables such as porosity and permeability.

Question 2

When evaluating published subsurface maps, a petroleum geologist should first assess:

Accepted Answer

The vintage, data density, and control point distribution

Answer

Map vintage, data density, and control point distribution are fundamental quality indicators that govern reliability of interpreted surfaces.

Question 3

A geologist wants to integrate well log data with seismic data to improve reservoir characterization. Which approach best exemplifies evidence-based practice?

Accepted Answer

Cross-validate well-derived rock properties with seismic attributes at well locations before extrapolating

Answer

Cross-validating well-derived properties with seismic attributes at calibration points ensures the relationship holds before spatial extrapolation.

Question 4

In petroleum geology research, what does a 'sensitivity analysis' primarily help determine?

Accepted Answer

Which input parameters most strongly influence the output estimate

Answer

Sensitivity analysis identifies which uncertain input variables drive the most variability in the output, guiding where to focus data acquisition.

Question 5

A P90 estimate in probabilistic resource assessment means:

Accepted Answer

There is a 90% probability the actual resource will be at least that amount

Answer

P90 is the 10th percentile of a cumulative distribution, meaning 90% probability the true value meets or exceeds it (conservative estimate).

(CPG) Certified Petroleum Geologist Practice Test

(CPG) Certified Petroleum Geologist Practice Test

CPG Research Methods & Evidence-Based Practice 2