芳烃显微荧光光谱的热演化特征——渤西海域第三系生油岩评价

THE THERMAL EVOLUTION CHARAC- TERISTICS OF AROMATIC HYDROCARBON

系统研究渤西海域两口井沙三段至东下段27块泥岩样品芳烃馏份的显微荧光光谱特征，以红／绿值Q（I650／I500）和λmax值作为判别生油岩演化的参数。研究结果表明，渤西海域中部东下段底部至沙三段生油岩进入生油门限，并处于低成熟阶段；东南部地区东下段底部及下伏地层进入生油门限，东下段底部至沙三段顶部生油岩处于低成熟阶段，大部分沙三段生油岩处于成熟阶段。

Systematically studied the microfluorescence spectrogram of aromatic hydrocarbon fraction of 27 sam- ples of mudstone which are taken from Es_3 to Ed_1 in two wells of Boxi Sea area.We are using the values of Q(I_(650)/I_(500)) and λ_(max) as the parameters to discriminate the evolution of source rock.The studied results shows that the source rock of basal Ed_1 to Es_3 of the central part of Boxi Sea area reached the oil generating threshold and are in the low maturation stage.The basal Ed_1 and the subjacent strata of the southeastern part area reached the oil generating threshold.The basal Ed_1 to the top of Es_3 the source rock are in low matura- tion stage and most of Es_3 source rock are in maturation stage.