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准噶尔盆地原油物性和生物标志化合物组合特征综合研究表明,玛北、夏盐、玛东等玛湖凹陷斜坡区的原油以二叠系风城组为主要油源,其地化特征可与西北缘原油对比;该类原油中特高含量的三环萜烷和较高的C_(29)甾烷αββ/(αββ+ααα)异构化比值主要受长距离运移作用的影响。石西油田、石南油田及陆南地区的原油以盆1井西凹陷的二叠系乌尔禾组为主要油源;马桥凸起和莫北凸起的原油以盆1井西凹陷的乌尔禾组为主要油源,同时有侏罗系的贡献;盆地东部五彩湾油田为石炭系自生自储的原油,北三台油田的源岩为二叠系芦草沟组。从西北缘、玛北油田、陆南构造西段到东段源岩的沉积环境逐渐偏向氧化,呈现渐变过渡的特征。
The comprehensive study on the characteristics of crude oil physical properties and biomarkers in the Junggar Basin shows that the crude oil in the slope areas of Mahu depression such as Mabei, Xiayan and Caodong is mainly derived from the Permian Fengcheng Formation, and its geochemical characteristics can be compared with the northwestern margin Crude oil. The ratio of isomeric tricyclic terpanes and higher isomerism of C 29 sterane (αββ / (αββ + ααα)) in these crude oils is mainly affected by long-distance transport. The crude oil in the Shixi oilfield, Shinao oilfield and Luonan area is mainly derived from the Permian Wuerhe Formation in the west depression of basin 1; the oil from Maqiao uplift and Mobei uplift is dominated by the western depression of basin 1 Wuerhe Formation is the main oil source with the contribution of Jurassic. Wucaiwan oilfield in the eastern part of the basin is a carboniferous self-storage oil, and the source rocks of the Beisansai oilfield are Permo-Lucaogou formations. From the northwestern margin, the sedimentary environment of Maobei oilfield and Luonan structural western segment to the eastern segment of source rocks gradually oxidized, showing a gradual transitional characteristics.