有效烃源岩的厚度不必很大，但有机质丰度必须高（有机碳含量大于0.5%），且要有一定的分布范围。图3表1参31（张水昌摘）
Efficient source rocks need not too large in thickness , but must contain higher organic enrichment ( > 0 . 5 % ( wt. TOC )) intervals and have a certain distribution scope .
张水昌