The Influence Of Seepage Velocity And Oil Saturation To Foamer Foaming Ability

This article through four groups of experiments performed on foam floodingseepage velocity and oil saturation of foaming agent foaming ability influenceresearch. Four groups of experiments are: no oil condition microcosmic modeldisplacement experiments, oily condition microscopic displacement experiment, nooil condition of sand filling tube displacement experiment condition; oil sand packedtube displacement experiment.No oil condition microcosmic model displacement experiments are in accordancewith the foam" water stability, encountering oil bust" characteristics, study no oilcondition microscopic oil displacement mechanism.In the above experimental basis, design of oil condition microcosmic modeldisplacement experiments, the experiment proved that the high oil saturationconditions, unstable foam; along with the displacement, the oil saturation is reducedgradually, the foam begins to tend stable. When the foam stability, its rupture and thegeneration, splitting and coalescence, tensile and compressional deformationphenomenon, and oil displacement mechanism in the Jia Min effect is more obvious.No oil condition of sand filling tube displacement experiment results show thatthe foam at low injection rate, unstable, injection pressure and water pressure is quite.When the injection speed is3m/D, injection pressure to rise significantly. Pressurefrom the0.7MPa to the1.8MPa process, resistance coefficient from1.9to6.09, proofof sand filling tube significantly reduced the permeability. Combined with themicroscopic model of flooding mechanism, described in the higher injection speedcan form bubbles and more stable, produced the Jia Min effect.Oil condition sand packed tube displacement experiment shows that, due to highoil saturation leads to unstable foam, injection velocity by1m/D up to6m/D, the oilsaturation of75.2%(anhydrous drive) and40.2%pressure changes are small. Injection velocity by1m/D up to6m/D, the oil saturation of32.4%and26.4%sandpacked tube inlet end of a first pressure gauge and second gauge pressure differencebetween both the larger. With no oil condition of sand filling tube displacementexperiment, described in fill sand tube in a foaming phenomenon, but the second halffill sand tube high oil saturation, unstable foam. Injection speed is1m/D and2m/D,the oil saturation of21.6%and20.4%sand packed tube5pressure to express thenumber did not change significantly. In the oil saturation of21.6%sand packed tube,when the injection speed is3m/D, a first pressure gauge and second gauge pressuredifference between by0.53MPa to1.54MPa, illustrates the foaming phenomenon; otherpressure gauge pressure difference between both increase, the bubble in the conditionof relatively stable. Oil saturation of20.4%sand packed tube, when the injectionspeed is3m/D, differential pressure increases markedly, the bubble in fill sand pipein blistering and more stable.