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早第三纪早期,由于基岩块断下沉,泌阳凹陷开始形成,接受了一套厚约8000米的巨厚沉积。下第三系核桃园组第三段就是其中一个最主要的生、储油岩系(简称核三段)。本文根据该凹陷的主力油田之一——双河油田106块储层岩样的压汞实验、铸体薄片观测及少数样品的电镜扫描成果,并参考前人有关资料,对孔隙结构特征及其成因作一初步探讨。
Early Early Tertiary, due to the subsidence of basement blocks, the Biyang depression began to form and accepted a set of 8,000 meters of thick sediments. The third section of the Lower Tertiary Hetaoyuan Formation is one of the most important biological and oil-bearing rock series (the third nuclear section). According to the mercury intrusion porosimetry of 106 reservoir samples in Shuanghe Oilfield, one of the main oilfields in this depression, the observation of cast thin sections and the electron microscopic scanning of a few samples, and referring to the relevant data of previous authors, the characteristics of pore structure and its Genesis for a preliminary discussion.