Experimental　simulations　were　performed　on　the　flow　in　pores　of　porous　media　to　solve　the　problem　of　small　pore　and　low　oil　recovery　in　low　permeability　oilfields.　Experiments　were　conducted　for　the　flow　in　two　rectangular　microchannels　with　200　μm　in　width,　and　1.8　μm　and　4.1　μm　in　depth　respectively.　The　characteristics　of　oil　flow　and　oil-water　two-phase　flow　with　the　oil　fraction　10%-60%　in　volume　were　obtained　using　the　digital　microscopy　video　technology　and　the　microfluidic　testing　technology.　The　experimental　results　indicate　that　for　the　two　channels　with　1.8　μm　and　4.1　μm　in　depth,　the　friction　factors　for　the　oil　flow　are　lower　than　theoretical　values　and　vary　linearly　with　Reynolds　number.　The　experimental　Poiseuille　numbers　are　less　than　the　predictions　and　the　difference　between　them　increases　with　the　decrease　in　the　microchannel　size.　Moreover,　for　the　oil-water　two-phase　flow,　the　friction　factor　also　varies　linearly　with　Reynolds　number　but　is　higher　or　lower　than　the　theoretical　value　at　different　oil　fractions.　In　addition,　the　Poiseuille　number　generally　decreases　with　the　increase　in　the　oil　fraction　but　increases　sharply　when　the　oil　fraction　is　20%　or　60%,　showing　that　the　change　of　the　Poiseuille　number　with　the　oil　fraction　is　affected　significantly　by　the　hydrophilic　property　of　channel　walls.