近年来,东营凹陷每年新探明的储量有近一半来自岩性油气藏,岩性油气藏已经成为保持油田稳产的主要贡献者。在近年来的油气勘探中,由于地震地质综合解释技术水平的提高,基本上可以准确地钻遇到钻前所预测的砂岩体,但是不同砂体的含油性却大相径庭。主要以东营凹陷的牛35砂体为例,解剖了砂体储集物性纵向上的变化,分析了控制透镜状岩性油气藏成藏的微观因素。认为泥质(灰质)含量、孔隙大小、渗透率均质性、喉道特征、方解石胶结物含量等对油气进入砂体成藏具有控制作用。

Exploratory difficulty is increasing when lithologic reservoirs become main targets in anaphase exploration of oil field. The sandstone bodies can be drilled accurately, because of improvement of seismic geology interpret technology, but their oilness are different. In this paper variety of character of reservoir of Niu-35 sandstone body are anatomized, microscopic factors, which control the formation of lithologic reservoir, are discussed, such as contend of mud(ash), calcite, size of porosity.