油气“倒灌”论质疑

Petroleum migration is an important issue in petroleum geology, and petroleum downward migration is a controversary figure. Taking the Weiyuan Gasfield in Sichun Basin, Xifeng Oilfield and Jinybian Gasfiteld in Ordos Basin and Fuyang reservoir in Songliao Basin as examples, the probability of deep source oil and gas which could migrate upward and accumulate in some traps is analyzed. The concept of petroleum downward migration violates the fundamental law of physics by which the oil and gas always migrate upward from below due to the buoyancy action. If the viewpoint of petroleum deep source is recognized, the petroleum exploration targets could be expanded, which provides theoretical foundation for the exploration of basement reservoirs.