Abstract: Organic source theory shows various indexes that do objectively play a role of guiding oil-finding efforts, but it could be in big issues for its own. Present source theory may only be substantially as a caprock index and a direct oil-finding index similar to oil seepage. U-Up to now, no one has proven by experiment that organic matter at low temperature (whether continental facies or marine facies) can generate crude. This paper lists more than twenty contradictions or inconsistencies existed in present organic source theory, and offers a lot of new situations appeared recently which are in favor of inorganic source theory in contrary. For the future, if inorganic source theory is universally accepted, sedimentary rocks, especially under the caprock, will still be targeted for oil, but one might have the courage to explore new areas and new sequences, thanks to breakthrough of thought bondages. Moreover, one may pay more attention to searching for fault-related reservoirs. Otherwise, if one's thinking is astricted in frame of organic theory, a few oil-gas fields can be missed to discovery.

Key words: oil source theory, organic origin, inorganic origin, continental oil source, source index, caprock, deep faulting