Abstract: With large amounts of analytical data on oil and gas, the author approciates and supports the deep inorganic genesis theory of oil and gas, in which it is suggested that the upwelling liquid-gas materials are the source material of oil and gas. Deep fractures are the channels for the source material and the poremembrane network connected with deep faults is the reservoir space for oil and gas, sheltered traps are formed in various rock series with relative low permeability. Futhermore, according to the geological conditions for the formation of oil and gas of inorganic genesis, an inorganic genesis model of oil and gas, and the guideline for oil and gas exploration in western Sichuan Basin are discussed in this paperd.