沥青质傅里叶变换红外光谱 (FT IR)分析及其在有机地球化学研究中的应用

沥青质傅里叶变换红外光谱（FT－IR）分析可以反映出其分子结构上的特征,红外吸收因子Z[I(1380cm^-1)/I(720cm^-1）]能指示不同来源沥青质的母质类型;吸收因子Y[I(1600cm^-1)/I(1450cm^-1)]可以较好地讨论沥青质的成熟度演化状况;沥青质的红外研究认为,所有的沥青质都具有较好的再生烃潜力,其中Ⅲ型母质来源的沥青质具有较好的再生气潜力。而Ⅰ和Ⅱ型母质来源的沥青质具有高的再生油潜力。

Characterization of FT IR analysis of asphaltenes and its geochemical implications

FT-IR analysis can reflect the structural features of asphaltenes. The results of FT-IR analysis of asphaltenes indicate that the adsorption factor Z [I (1 380 cm-1)/I (720 cm-1)] can well be used to type the primitive kerogens. Adsorption factor Y [I (1 600 cm-1)/I (1 450 cm-1)] can supply information about the evolution level of asphaltenes, and could be used to study the maturity level of oil reservoirs. According to the adsorption factors A {[I (2930 cm-1)+I (2 860 cm-1)]/I (2 930 cm-1)+I (2 860 cm-1)+I (1 630 cm-1)],Z and in conjunction with the elemental analysis results, asphaltenes are presumed to be of well potential for hydrocarbonds regeneration. the asphaltenes from type III kerogens have well prospect for gas regeneration, while asphaltenes form types I and II kerogens possess some potential to regenerate oils.