摘要
对金湖凹陷原油和烃源岩中分子骨架结构相似、分别含N、S、O的三类杂环芳烃——吡咯类、硫芴和氧芴系列的分布特征及其应用进行了初步探讨。烃源岩中这三类杂原子化合物的丰度一般高于原油,其在油、岩中的丰度差异按含N、O和S化合物的顺序依次降低,指示三类化合物吸附性依次降低;原油和烃源岩中三类杂原子化合物丰度具有较好的正相关性,并与芴系列具有良好的多项式关系,暗示三类杂原子化合物在原生和或后生作用与干酪根降解方式上可能有某些相似性与相关性;在未熟—低熟阶段,随着成熟度的增加,三类化合物的丰度逐渐增加,指示成熟度对其有一定的控制作用。NSO化合物在油气运移、成熟度评价和指相等方面具有重要意义。
Characteristics of three kinds of NSOs compounds with similar molecula r structure in oils and rocks of Jinhu sag,Subei basin are analyzed,which are pyrrolic nitrogen compounds,dibenzofurans and dibenzothiop henes.It is found that the source rocks are r elatively rich in the three kinds of h eteroatomic compounds than the oils,especially the pyrrolic nitrogen co mpounds,with the dibenzothiophenes least enriched among the three of th em.It is inferred that polarity of the three c ompounds decrease according to the o rder of pyrrolic nitrogen compounds,dibenzofurans and dibenzothiophen es.The abundance of the three kinds o f the compounds displays good positive correlation each other,suggesting possibly similar genetic mechanism.There are also good correlation between fluorene and the three compounds respectively,suggesting probably gen etic correlation between them.The f actors having control on the heteroatomic c ompounds are probably similar to hyd rocarbon fraction.It is observed th at the abundance of the three compounds in t he oils and rocks all increases with t he increasing maturity,and it seems that maturity also have an effect on the re lative distribution of dibenzothio phenes.There are apparently migration effect of the pyrrolic nitrogen compounds i n the oils and the migration effect of dibenzofurans and dibenzothiophen es could also be observed from their absolute abundance variety.NSOs compounds may have significance in several asp ects such as oil migration effect,oil and source rock correlation,maturity e valuation,paleoenvironment etc.
出处
《地球化学》
CAS
CSCD
北大核心
2001年第4期347-352,共6页
Geochimica
基金
国家重点基础研究资助项目(G1999-43310)
关键词
吡咯类化合物
硫芴
氧芴
分布特征
地球化学意义
原油
烃源岩
油气运移
成熟度
pyrrolic nitrogen compounds
diben zothiophene
dibenzofuran
fluore ne
distribution characteristics,geochemical significance