胜利油区埕岛地区原油地球化学特征与油源分析

Analysis of geochemical characteristics and oil sources in Chengdao area,Shengli petroliferous district.

为了在胜利海域快速、准确地开展逸油来源鉴定,详细分析了胜利油区埕岛地区原油的物性以及饱和烃和芳烃气相色谱、生物标志化合物等地球化学特征,并在此基础上开展了该区原油的油源研究。结果表明,该区西部潜山原油来源于埕北凹陷沙三段烃源岩,中部潜山和东部潜山原油来源于渤中凹陷沙三段、沙一段烃源岩;其上覆的古近系和新近系原油可划分为6种类型:Ⅰ类、Ⅱ类原油分别来自埕北凹陷沙一段、沙三段烃源岩,Ⅲ类原油为埕北凹陷沙三段、沙一段烃源岩提供的混源油,Ⅳ类和Ⅴ类原油分别来自渤中凹陷的沙一段、沙三段烃源岩,Ⅵ类原油为这2个凹陷沙三段和沙一段烃源岩提供的混源油。

In order to recognize the escaping oil source rapidly and accu- rately in Shengli sea area,the physical properties and geochemi- cal characteristics of oil such as biomarkers features and gas chromatographic features of saturated and aromatic hydrocar- bons,were analyzed in Chengdao area,Shengli Oilfield.And then the oil source was researched.There are several different oil sources in the buried hill:the oil at the west was from Es_3 source rocks in Chengbei Depression and those at the middle and east were from Es_3 and Es_1 source rocks in Bozhong Sag.Further- more,the oil at the overlying Tertiary reservoir beds were divided into six types:the oil of typeⅠand typeⅡcame from Es_1 and Es_3 source rocks of Chengbei Sag respectively,typeⅢis the mixed oil came from Es_1 and Es_3 source rocks of Chengbei Sag,typeⅣand type Vcame from Es_1 and Es_3 source rocks of Bozhong Sag respectively,and typeⅥis the mixed oil came from Es_1 and Es_3 source rocks in the two depressions.