The distribution law of remaining oil in the fluvial sandstone reservoir with high water-cut-an example from the zhong-1 district in Gudao oil field

摘要

Taking the Zhong-1 District Ng3-4 of the Gudao Oil field as an example, this paper has discussed the formation conditions, distribution laws controlling factors of the remaining oil of fluvial sandstone reservoir with high water-cut. The emphasis of this paper is focused on the controlling effects of sedimentary microfacies to the distribution of the remaining oil. The authors put forward that the remaining oil assembles abundantly and mainly in major face belt, that is, point bar microfacies.