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通过对直罗油田延长组长。油层组储层孔隙结构及油水分布的研究，分析了直罗油田低渗砂岩储层孔隙结构特征对油水分布的控制作用，试图对长期困扰油田勘探与开发的油水分布及其影响因素问题作出初步探讨．结果表明，直罗油田延长组第二油层组孔隙类型以细小的次生孔隙为主，孔隙结构非均质性较为严重，孔隙、喉道半径较小，孔喉分选较差．较差的孔隙结构导致油水分异作用较差，油水同出带厚度为１８５．７ｍ，油层全部为油水混出的油水混合带，从而形成了无边水、底水且油水同出的砂岩岩性油藏．孔隙结构相对较好的层段和区块是油气富集的主要场所．
Through the Zhiluo Oilfield extension team leader. The pore structure and the distribution of oil and water in the reservoir of the oil reservoirs, the control effect of the pore structure of the low permeability sandstone reservoirs on the oil-water distribution in Zhiluo oilfield is analyzed, trying to make a preliminary study on the distribution of oil and water and its influencing factors which long plagued the oilfield exploration and development Discussion. The results show that the pore types of the second oil layer of Yanchang Formation in Zhiluo Oilfield are dominated by small secondary pores, and the pore structure heterogeneity is serious. The radius of pores and throats is small, and the pore throat is poorly sorted. The poorer pore structure results in poorer oil-water differentiation with a thickness of 185.7 m in the oil-water zone and a mixed oil-water zone with all of the oil-water mixture, resulting in sandstone lithology with boundless water, bottom water and oil and water Reservoir. Layers and blocks with relatively good pore structure are the main sites for hydrocarbon enrichment.