Which of the following statements are not true with reference to Petroleum production.

A
Petroleum occurrences are associated with anticlines and fault traps in the rock formations.
B
In regions of folding, anticlines or domes, it occurs where oil is trapped in the crest of the up fold.
C
The oil bearing layer is a non porous limestone or sandstone through which oil may flow.
D
The oil is prevented from rising or sinking by intervening non-porous layers.

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