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本文研究了黄骅拗陷中区板桥和歧口两个凹陷生油岩的演化特征,将有机质的成熟演化划分为四个阶段;提出该区石油液态窗为85.5～163℃(2000～4200米)。根据烷烃特征,将该区下第三系生油层划分为五种类型,将原油划分为二大类、六亚类。并在上述基础上,进行了油源对比研究,认为板桥凝析油气田的油源来自板桥凹陷沙三段生油岩,而大港油田和唐家河油田的油源来自歧口凹陷的沙二、三段生油岩。
In this paper, the evolution characteristics of source rocks of Banqiao and Qikou of Huanghua Depression are described. The evolution of organic matter is divided into four stages. It is proposed that the oil liquid window of this area is 85.5 ~ 163 ℃ (2000 ~ 4200 m ). According to the characteristics of alkanes, the tertiary oil reservoirs in this area are divided into five types, and the crude oil is divided into two categories and six sub-types. On the basis of the above, a comparative study of oil sources was carried out. It is concluded that the oil source of Banqiao condensate oil and gas field is from the source rock of Es3 in Banqiao Sag, while the oil sources of Dagang Oilfield and Tangjiahe Oilfield come from Sha2, Three sections of raw oil rock.