The region where there are abundant magma rocks has become important exploration fields for oil and gas, but the oil-gas origin in the region is very complicated. The intense magma activities took place ever in Luojia area of Zhanhua sag where rich oilgas with abnormal chemical properties is accumulated. By cores and log interpretation, we determined the type and orientation of the magma rocks, then, studied source rock忆s petrology nearby the magma rocks, and then verified the source rock thermal metamorphism and organic carbon mineralization. By means of chemical analysis, we found that the source rocks maturity is very high and experienced abnormal change, as well as higher H2 S and CO2 in oil-gas. We may infer that the magma rocks, on the one hand, accelerated organic matter thermal evolution in the source rocks as well as the hydrocarbon generation, on the other hand, they caused the carbonate and sulfate decomposition, generating inorganic H2 S and CO2 . In the end, we indicate that the magma activities are causes of oil-gas enrichment and abnormal properties, and suggesting that the magma rocks should be accountable of the oil-gas origin and exploration and development.