摘要
本文总结了孢粉、沟鞭藻等六个门类的化石在东濮凹陷下第三系地层纵向上各段的丰度,研究了沟鞭藻横向上的分布趋势,认为微古生物群的两个繁盛期与该地区两套主力生油层及两个油气藏具有一致性。从不同地区、不同层位研究了500多块干酪根样品的类型、丰度,认为富含沟鞭藻、绿藻,则其母质类型为Ⅰ和Ⅱ_1类,在砂泥岩间互沉积层,若具有储油条件,并达到成熟阶段,便可找到油气藏。
This article summarizes the total abundance of six phyla of sporopollen, dinoflagellate fossils etc. in the vertical section, presents a detailed study on the distribution of dinoflagellates and green algae in horizontal direction, and shows that microbiota summit pe-riods corresponds to two sets of reservoir beds in Dongpu Depression respectively. In accordance with 500 samples of source rocks in different areas and series, the author sums up the kerogen types and abundance of the organic matter in the source rock, and come to a conclusion, i.e, type Ⅰ or Ⅱ_1 will occur in case that source rock contains abundant dinoflagellate and green algae. In a formation composed of an alternatively deposited sand and shale layers, oil and gas reservoirs can be found provided that these organisms are ma-tured and favorable trapping condition exists.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1992年第2期83-91,共9页
Acta Petrolei Sinica
