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- W2349205467 abstract "The distribution of microcosmic remaining oils after polymer flooding is a basis for forecasting and tapping the potential of remaining oils after polymer flooding.By applying some novel methods wihich including frozen sectioning,ultraviolet fluorescence and laser confocal scanning microscopic analysis,distribution laws are studied about microcosmic remaining oils after polymer flooding in rock samples with different water-washing degrees from the Daqing oilfield.The analytical result demonstrated that the remaining oil in weak water-washing rocks after polymer flooding is mainly in cluster and intergranular adsorption forms of free residual oils,while the bounded remaining oil in medium water-washing rocks accounts for 42.9% of the total microcosmic remaining oils and the remaining oil in strong water-washing rocks occurs mainly in a bounded form of thin oil film that envelops the particle surface.With the increase of oil displacement degree after polymer flooding,the proportion of lightweight hydrocarbon components decreases significantly,while that of heavy hydrocarbon fractions increases relatively.In general,heavy hydrocarbon components are continuously distributed on the surface of rock particles,while lightweight hydrocarbon components occur in intergranular pores mainly in a flaky,relatively continuous and whole scattered but locally enriched state.The clay minerals and lightweight hydrocarbon components coexist within intragranular micropores and tiny pore throats.There is no oil within particle fractures and pores that are fully filled with clay minerals." @default.
- W2349205467 created "2016-06-24" @default.
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- W2349205467 date "2013-01-01" @default.
- W2349205467 modified "2023-09-23" @default.
- W2349205467 title "The distribution of microcosmic remaining oils after polymer flooding in Daqing oilfield" @default.
- W2349205467 hasPublicationYear "2013" @default.
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