【摘要】 礼乐盆地位于南海海域南部,拥有大面积深水区域,长期以来缺乏烃源岩生烃潜力方面的研究。在认识礼乐盆地构造—热演化特征的基础上,选用盆地内地震测线为研究对象,对盆地主要烃源岩热演化及生烃状态进行了研究。研究揭示:①礼乐盆地深水区烃源岩有机质热演化程度最高,现今已经达到生烃高峰,甚至湿气阶段,斜坡区热演化程度最低,尚未进入生烃阶段;②礼乐盆地白垩系烃源岩在深水区生烃潜力最大,与斜坡区存在量级差异;③礼乐盆地存在二次生烃过程,白垩系烃源岩的二次生烃发生在斜坡带和礼乐滩,古新统—始新统烃源岩的二次生烃发生在深水区。更多还原

【Abstract】 Lile basin with large deep water acreage,located in the southern part of South China Sea,is short of petroleum research,especially researches on the hydrocarbon generation potential.Based on the knowledge of thermo-tectonic evolution,taking the significant seismic profile as research object,detailed study on the maturation and hydrocarbon generation of the major source rocks in the Lile basin has been carried out simulated.The result suggests that,in Lile basin:①Maturation of the source rocks is the highest in deep water,which reaches hydrocarbon generation peak or even wet gas stage.While the maturation is lowest in the slope area,which is still immature;②The Cretaceous source rocks have largest hydrocarbon generation potential in the deep water area while less in the slope area;③Secondary hydrocarbon generation exist in the Lile basin.The Cretaceous source rocks underwent secondary hydrocarbon generation in the slope and Rand Bank areas.The Paleocene-Eocene source rocks underwent such process in the deep water area.更多还原