What would be required for an unconformity to trap oil at depth?
A) permeable units above the unconformity and impermeable units below the unconformity
B) permeable units below the unconformity and impermeable units above the unconformity
C) permeable units above and below the unconformity
D) impermeable units above and below the unconformity
E) any of these

Question

Quizplus · Accepted Answer

For an unconformity to trap oil at depth, there must be permeable units below the unconformity where oil can accumulate, and impermeable units above the unconformity to prevent the oil from migrating further upwards. This creates a seal that traps the oil.

What Would Be Required for an Unconformity to Trap Oil