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利用岩心资料，通过薄片观察、扫描电镜、Ｘ衍射等分析方法，对五号桩油田沙三下段湖相浊积岩的储层特征进行了深入研究．结果表明．沙三下段湖相浊积岩受成岩后生作用的影响，原生孔隙受到强烈改造，形成两个次生孔隙发育带．无论在纵向上或横向上储层物性变化甚大，同时受沉积相带控制，辫状水道及主沟道微相是最有利的储集相带，道间微相为较有利的储集相带．
Based on the core data, the reservoir characteristics of the lacustrine turbidite rocks in the lower part of the third member of the Third Member of Wulimin Oilfield were studied by means of thin-film observation, scanning electron microscopy and X-ray diffraction. The results show. Influenced by the diagenesis of the lacustrine turbidites in the lower part of the Third Member of Shahejie Formation, the primary pores were strongly transformed to form two secondary pore development zones. Whether in the vertical or horizontal reservoir physical properties vary greatly, at the same time by the sedimentary facies control, braided channel and the main channel microfacies is the most favorable reservoir facies, channel interphase microfacies for the more favorable reservoir facies .