Oil is produced by subducted ocean floor containing carbonates and water. It is a closed loop. Oil isn’t produced from nothing. It is cooked up continuously as more ocean floor ingredients are subducted into the super high pressure cooker. It then is squeezed upward into the really HUGE pools we find everywhere.
It is not squeezed upward. Because it is lighter than the salt water it is encased in, it is buoyant. It migrates, one drop at a time, in search of a trap. Most oil missed a trap and comes to the surface.