【摘要】 指出珠江口盆地东部地区天然气中的烃类气体（包括CO₂气藏中的少量烃类气体）都是有机成因。CO₂气体有有机成因、无机成因,也有混合成因。无机成因的CO₂气体是在上新世以后火山—岩浆CO₂气体通过深断裂向上运移,取代了早期形成的油气藏中的油气而形成的。珠江口盆地东部地区钻探过程中,在3个构造发现了4个CO₂气藏。特别是阿纳达科合作区内28-2-1井的CO₂气藏,使油气勘探失利。因此,研究CO₂气藏的成因及其与油气藏的关系,对盆地内下一步油气勘探工作显得非常重要。更多还原

【Abstract】 Hydrocarbon gas in natural gas (including that in CO2 reservoir )is of organic origin in eastern Pearl River Mouth Basin, While CO2 gas is either organic or inorganic or mixed origin. The inorganic CO2 gas is of volocanic-magmatic origin which was migrated upwards along deep faults and replaced the oil & gas in early formed oil-gas reservoirs after Pliocene.更多还原