【摘要】 南海莺-琼盆地崖13-1气田凝析油的五环三萜烷以W和T双杜松烷为主,其先体聚杜松烯是被子植物龙脑香科达玛树脂的主要组成。中中新统梅山组海相泥岩的干酪根分析为Ⅲ型,而饱和烃和芳烃气相色谱和质谱分析检测出高含量的多种系列的树脂化合物,最大系列是十二环的五杜松烷。因树脂化合物的存在,梅山组岩样的产烃率(HC/TOC)为49-179 mg/g,属好—优烃源岩。然而用传统地化方法评价则为差烃源岩。笔者提出与传统看法有别的新认识:海相地层中的有机质可主要来自陆源;陆源有机质可呈超显微状态存在;树脂体的出现和分布具有时代性和地区性。更多还原

【Abstract】 The pentacycletriterpane of condensate of Yar 13-1 gas field of Yinggehai-Qiongdongnan basin of South China Sea principlly are W and T bicadinanes.Polycadinene the mother material of W and T bicadinanes is possible the principle composition of angiosperm dipterocarpaceae dammar resinite.The kerogen type of Meishan group of middle Miocene is Ⅲ,and the gas chromatoraphy and mass spetometry of saturated hydrocarbon and aromatic hydrocarbon detected the high content multiple series resinite compounds,the maximum series is dodecacycle pentacadinane.The hydrocarbons productivity (HC/TOC) of the rock sample of Meishan grolip is 49-179 mg/g due to exist of resinite compounds,belong to good-excellent hydrocarhon source rock.But it’s poor hydrocarbon source rock,if evaluate with traditional geochemical methode. The author suggests the new recognitions which are different from the traditional views:the organic material of marine formations may be principlly source from land-source area (the terrigenous may be exist with submicroscopic state;the occurrence and distribution of resinite have the meaning of chronological and regional behaviour.更多还原