CPG CPG Basin Analysis & Structural Geology

Question 1

Which type of sedimentary basin forms primarily due to lithospheric extension and thinning?

Accepted Answer

Rift basin

Answer

Foreland basin

Answer

Strike-slip basin

Answer

Peripheral basin

Question 2

The petroleum system concept requires which of the following essential elements?

Accepted Answer

Source rock, reservoir rock, trap, seal, and overburden

Answer

Only source rock and reservoir rock

Answer

Trap, seal, and migrating fluid only

Answer

Source rock and structural closure

Question 3

Vitrinite reflectance (%Ro) is used in basin analysis primarily to assess:

Accepted Answer

Thermal maturity of source rocks

Answer

Reservoir porosity

Answer

Fault activity timing

Answer

Depositional environment

Question 4

In structural geology, a thrust fault is characterized by:

Accepted Answer

Hanging wall moving up relative to footwall at low dip angle

Answer

Hanging wall moving down relative to footwall

Answer

Vertical displacement with minimal horizontal component

Answer

Lateral displacement parallel to strike

Question 5

Which basin type is typically associated with the foreland of fold-and-thrust belts and is loaded by the weight of thrust sheets?

Accepted Answer

Foreland basin

Answer

Rift basin

Answer

Pull-apart basin

Answer

Passive margin basin

Question 6

The 'oil window' in a sedimentary basin typically corresponds to vitrinite reflectance values of approximately:

Accepted Answer

0.6–1.3% Ro

Answer

0.2–0.5% Ro

Answer

1.5–2.0% Ro

Answer

Greater than 3.0% Ro