应用含氮化合物探讨柴达木盆地乌南地区原油运移  

A Discussion on Petroleum Migration in the Wunan Oilfield of Qaidam Basin Based on Nitrogen Compounds

作　　者：张明峰[1] 妥进才[1] 郭力军 陈茹[1] 李中平[1] 刘立 

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中国石油青海油田分公司勘探开发研究院,甘肃敦煌736202 [3]甘肃省环境科学设计研究院,甘肃兰州730000

出　　处：《天然气地球科学》2010年第5期727-731,共5页Natural Gas Geoscience

基　　金：国家自然科学基金项目(编号:40773052);中国科学院重要方向项目(编号:KZCX3-SW-147)联合资助

摘　　要：结合生物标志化合物特征,利用原油中含氮化合物组成和相对丰度的变化,讨论柴达木盆地西南缘乌南地区原油的运移方向。结果表明,乌南原油的类型较为一致,来自于同一油源,成熟度变化较小,原油中含氮化合物的分布和组成特征较好地指示了该区原油运移方向,随着运移作用的加强,含氮化合物绝对浓度降低,"屏蔽"型与"暴露"型或"半暴露"型化合物的比值增加。乌南地区油源在其西侧邻近的生油凹陷,运移方向主要是自西向西北和自西向东南方向运移。Nitrogen compounds are a kind of non-hydrocarbon fraction,and could be used as effective tracers in oil migration and as parameters in evaluating the quantity of migrated oil.Using the nitrogen compounds in the crude oil composition and relative abundance of change,combined with hydrocarbon biomarker analysis of the characteristics of crude oil,the authors discuss on petroleum migration in the Wunan oilfield of Qaidam basin.The results indicate that the type of Wunan crude oil is more consistent from the same source.Significant oil-migration effects of nitrogen compounds in the oils are observed.With the strengthening of the role of migration,the concentration of nitrogen compounds is decreased.It seems that migration effect among pseudo-homolog of carbazoles and benzocarbazoles is more apparent than that among nitrogen marked,partially marked and exposed isomers.The results also show Wunan crude oil may be generated on its adjacent westside depression.The oils are likely to migrate from west to north and from northwest to southeast.

关 键 词：乌南油田 生物标志化合物 含氮化合物 运移 

分 类 号：TE122.113[石油与天然气工程—油气勘探]