The dimethyl naphthalene composition is used as an indicator to estimate the source organic matter of crude oil. This study examined the effect of maturation on this indicator. Heating experiments were performed on dimethyl naphthalenes and immature coal. The composition of indicator naphthalenes in terrestrial organic matter decreased with maturation. This study concluded that the dimethyl naphthalene ratio can be used as an indicator of source organic matter at random mean vitrinite reflectance values of up to 1.3%–1.4%.

中文翻译：

---

成熟度对用于评价原油来源有机类型的二甲基萘指示剂的影响

以二甲基萘组成作为判断原油来源有机质的指标。本研究检验了成熟度对该指标的影响。对二甲基萘和未成熟煤进行了加热实验。陆地有机质中指示剂萘的组成随着成熟度的降低而降低。该研究得出的结论是，在随机平均镜质反射率值高达 1.3%–1.4% 的情况下，二甲基萘比率可用作源有机质的指标。