相对于沥青质或可溶性有机物而言，干酪根的分子量高。
Kerogens have a high molecular weight relative to bitumen, or soluble organic matter.
可溶性添加物能够增加沥青质胶团的分散度，使之更趋向多分散。
The additives could increase the polydispersity of asphaltene colloidal particles as well.
在过成熟阶段，可溶有机质亦发生了芳核的缩聚反应，使芳烃含量减少，大分子的沥青质含量增多。
Dissolvable aroma-hydrocarbons tend to aggregate at the over-maturity stage, resulting in the reduction of aroma-hydrocarbons and the increase of bitumen.
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