混合沉积研究进展及其油气地质意义

Research Process in Mixing Deposition and Its Geological Significance

混合沉积是一种特殊的沉积类型,学者在混合沉积研究方面的报道不断涌现。综合前人研究,对混合沉积的研究历程及研究进展进行总结,详述混合沉积的分类命名、成因类型、控制因素、沉积模式及油气地质意义等内容。早期研究主要集中于混合沉积的表象特征,21世纪初期,主要研究混合沉积对沉积环境的指示意义,近期学者们主要研究混合沉积的石油地质意义。在总结前人研究的基础上,提出裂缝是混积层段形成优质储层不可缺少的条件,而混积岩可以成为优质烃源岩,源内源外均可成藏。

Mixing deposition is a special one. Recently, scholars have published a lot of research reports. In this paper, integrated with previous achievements, we sum up its research process and development, and illustrate its classification, terming, origins, controlling factor, model, and geological significance. The earlier study targeted its presentational feature; at the early of 21 century, the main research aimed to the significance to depositional environment; and the recent process focuses on the geological significance.Our study shows that fracture should be essential condition to forming high-quality reservoirs, mixing deposits might become highquality source rock, and accumulation inside or outside source was able to form reservoirs.