[colechristensen]

Oil pipelines are underground. The small proportions of above-ground sections were indeed targeted in this recent conflict but in war-prone areas so is the rest of your oil infrastructure including ships at sea and the ground based facilities can be fortified and defended.

[godwinson__4-8]

Is it vulnerable to the same sort of asymmetric attack, yes or no?

Can the system run if those above ground areas are destroyed? Of course hypothetically they can be defended. Just like hypothetically a few drones should not be able to shut the world's most powerful navy out of the strait.

In reality we know the real answer lies in an admission of your answer. The best defense is electing governments which will not wantonly engage in armed conflicts.