山东省孤南洼陷低熟油特征及成藏模式  

FEATURE OF LOW-MATURE CRUDE OIL AND ACCUMULATION MODEL IN GUNAN SAG,SHANDONG PROVINCE

作　　者：杨晓敏[1] 廖林[2] 姜晓健[2] 

机构地区：[1]浙江大学地球科学系,浙江杭州310027 [2]胜利油田有限公司孤岛采油厂,山东东营257231

出　　处：《地质科技情报》2004年第1期69-72,共4页Geological Science and Technology Information

摘　　要：通过对山东省济阳坳陷东部的孤南洼陷及其周边近百口井油样的分析,从原油饱和烃气相色谱、色质谱、物理性质和化学组成4个方面总结了孤南洼陷低熟油的性质,分析结果表明它们具有植烷优势、高伽马蜡烷指数、低C29甾烷的异构化系数:20S/(20S+20R)峰值比和ββ/(αα+ββ)峰值比低(0.12～0.35)的特征,明显区别于成熟油。运用生物标志化合物进行油源对比,表明低熟油的源岩为沙一段油页岩。其成藏模式有自源侧向运移聚集成藏、它源断层垂向运移聚集成藏和混合运移聚集成藏3种。This paper summaries the features of low-mature crude oil based on the spectrum of GC, GC-MS, as well as physical properties and composition of oil sampled from nearly one hundred productive wells in Gunan Sag.The result indicates their characteristics of low Ph/Pr ratio, high content of gammacerane and low ratios of C_(29) steranes 20S/(20S+20R)and ββ/(αα+ββ).The oil-source correlation by biomarks proves the First member of Shahejie Formation to be the source rock of low-mature crude oil. There exist 3 kinds of accumulation models of low-mature crude oil, namely authi-sourcing lateral migration-accumulation, allo-sourcing vertical migration through fault-accumulation and mixed migration-accumulation.

关 键 词：低熟油 油源对比 成藏模式 孤南洼陷 山东 

分 类 号：TE122.3[石油与天然气工程—油气勘探]