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中国含油盆地的湖相生油岩大多含有丰富的化石浮游藻类，主要包括非海相沟鞭藻囊孢和单细胞绿藻珠江口盆地西部早第三纪湖相生油岩的详细研究证实，化石浮游藻类相对丰度（占孢粉型总数）和无定形有机质含量（占干酪根总量）的高值指示古湖表层水高生产力和底部水体贫氧环境．表层水高生产力为湖泊沉积物提供大量的原地生藻质富氢有机质，贫氧的湖底有利于这类藻质无定形有机质堆积与保存．
Most of the lacustrine oil-bearing rocks in the oil-bearing basins in China contain abundant fossil phytoplankton, including non-marine dipsaci and single-cell green algae. Detailed studies on the Early Tertiary lake lacustrine source rocks in the Pearl River Mouth Basin confirm that fossil floating The high values of algae relative abundance (total number of sporopollen) and amorphous organic matter (total kerogen) indicate the high water productivity of ancient lake surface water and the oxygen-deficient environment of bottom water. The high productivity of surface water provides a large amount of protoplast hydrogen-rich organic matter for lake sediments, and the oxygen-poor lake bottom is conducive to the accumulation and preservation of amorphous organic matter of this algae.