Low-frequency Resonant Wave N₂Foam Flooding Effect Of The Influence Of Experimental Study

Nitrogen foam lfooding in the dual advantages of a combination of gas dirve and foamlfooding, not only has a strong profile control ability, but also has strong flooding. Vibrationoil recovery is rapid development both at home and abroad in recent decades, a new oilextraction technology have achieved good results. By low-rfequency resonant wave auxiliarynitrogen foam lfooding crude oil displacement eiffciency of indoor expeirments, effects oftemperature, gas-liquid ratio, oil saturation, pressure and injection of nitrogen foam sealing;secondary nitrogen by low-frequency resonant wave foam flooding process expeirments, theblocking of nitrogen bubbles, the oil displacement eiffciency and low-frequency resonantwave oil displacement eiffciency of nitrogen foam to studyExperimental results show that: the pcrforrnancc by nitrugen foam blocking experiments,and found the foam sealing performance and temperature, liquid ratio, pressure, oil saturationand injection; liquid ratio between1:1and2:1the blocking ability of the foam, the strongest;pressure, low temperature, the lower oil saturation, foam sealing ability. By low-rfequencyresonant wave auxiliary nitrogen foam lfooding in the indoor expeirment, obtained: thefrequency of the vibration wave15Hz, acceleration0.3m/s2foam system, half-life of thelongest composite index reached the maximum the performance of the foam is the mostsupeiror. Heterogeneous sand filling in the model experiment, the low-frequency resonantwave auxiliary nitrogen foam flooding for the ifnal dirve than a single nitrogen gas bubble oildisplacement efficiency by8.5%. Theory and practice show that the appropirate wave for theentire nitrogen injection foam flooding for the process is beneficial to be able to make thefinal oil displacement efficiency can be further raised。...