有效烃源岩的重要性及其研究

既有油气生成又有油气排出的岩层称为有效烃源岩，有机质特别富集的岩石称为优质烃源岩。过去对烃源岩仅强调生烃量，而忽略了排烃作用。但是现代成藏理论要求定量评价烃源岩的排烃作用和有机质富集层的分布规律，所以有效和优质烃源岩的研究正蓬勃开展起来。文章根据按期研究并结合文献调研，认为有效烃源岩形成于生物勃发与缺氧环境的叠加区域，它的识别既需要对实际剖面的地球化学测量，又需要对有机质含量和岩性不同的烃源岩进行模拟实验。有效烃源岩和优质烃源岩厚度不大、分布特殊，但是，它们对油气藏的形成作出了巨大的贡献。

Importance and research about effective hydrocarbon source rocks

Effective hydrocarbon source rocks are known as the rocks that may not only generate but also expulse hydrocarbon. The rocks with especially enriched organic matter are called high?quality source rocks. Previous studies focused on the content of hydrocarbon generation, but ignored the action of hydrocarbon expulsion. Quantitative evaluation to hydrocarbon expulsion action and distribution rules in abundance bed of organic matter is required in modern reservoir?forming theory. Therefore the study about effective and high?quality hydrocarbon source rock is growing vigorously. According to the recent study combined with literature investigation, effective source rock is considered to be formed in overlay area with prospering organism and anoxic environment. Geochemical measures to actual profile, simulation experiment of source rocks with various organic content and lithology should be done to recognize it. Effective and high?quality source rocks make a tremendous contribution to hydrocarbon reservoir forming in spite of a few thickness and special distribution.