The Mesozoic primary hydrocarbon accumulation has been heavily damaged by the denudations at latest middle Jurassic and latest Cretaceous and the faulting from Paleocene to Eocene.

• 中侏罗世末期、白奎纪末期的地层抬升剥蚀，以及古－始新世的断裂活动对中生代形成的原生油气藏破坏作用明显。