东濮凹陷沙一段油气来源

Oil and gas source of 1st Member of Shahejie Formation, Dongpu Depression

李继东 张成富 徐田武 赵聪会 许学良 陶登海

中国石化中原油田分公司勘探开发研究院，河南 濮阳 457001 中国石油渤海钻探第一录井分公司，天津 300280 中国石油集团测井有限公司青海分公司随钻测井（录井）项目部，甘肃 敦煌 736202 中国石油吐哈油田分公司三塘湖采油厂，新疆 哈密 839003

Exploration and Development Research Institute, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China No.1 Drilling Company, Bohai Drilling Engineering Company Limited, CNPC, Tianjin 300280, China Qinghai LWD Projects, CNPC Logging, Dunhuang 736202, China Santanghu Oil Production Plant, Turpan?鄄Hami Oilfield Company, PetroChina, Hami 839003, China

东濮凹陷沙一段油气来源认识不清，影响了下步勘探进程。通过研究沙一段原油及烃源岩的族组分、碳同位素、饱和烃色谱、生物标志化合物等地化特征，对比沙河街组油源，分析认为：沙一段原油具有高密度、高黏度、高凝固点特征；原油与烃源岩中含有较高的姥鲛烷、植烷、γ￣蜡烷，较低的重排甾烷、规则甾烷，微量孕甾烷及三环萜烷；沙一段原油为自生自储的低熟油，与沙二、沙三段烃源岩生成的原油有明显区别。

There is a debate about the source of oil and gas in the first Member of Shahejie Formation, which affects the next exploration progress. By analyzing the group composition, carbon isotope, saturated hydrocarbon chromatography, sterane and terpane characteristics of crude oil and source rocks, and combining with inclusion test, it shows that the crude oil of the first Member of Shahejie Formation has the characteristics of high density, high viscosity and high solidification point. The oil and source rocks contain high paraffine, phytane and γ?鄄paraffine, low rearrangement sterone and regular sterone, and trace pregnane and tricyclic terpene. Being different from the oil of hydrocarbon source rocks in the second and third members of Shahejie Formation, the oil in the first Member of Shahejie Formation is self?鄄generated and self?鄄stored low?鄄maturity oil.

10.6056/dkyqt201905006