颗石藻原样和不同温度热模拟实验分析结果表明, 颗石藻对低熟原油中长链烷基芳烃的贡献不容忽视; 藻类通过生物化学作用将无机硫转化为有机还原硫, 是岩石和原油中有机硫化合物中硫的来源之一; 应用甲基菲指数判识有机质成熟度时应结合其他成熟度参数; 在低熟条件下, 用三芴相对含量判识氧化还原环境更为可靠. The results of thermal simulations of coccolith and the different temperatures show that the contribution of coccoliths to long-chain alkylaromatics in low-mature crude oil can not be neglected. Algae convert inorganic sulfur to organic sulfur by biochemistry, In the organic sulfur compounds in one of the sources of sulfur; methylphenidate index to determine the maturity of organic matter should be combined with other maturity parameters; under low-ripe conditions, the relative content of fluorene to identify the redox environment is more reliable.