| China’s Liaohe Oilfield has a huge oil reserves,mining methods to heavy oil-based mining,more than 80% of the mining production for heavy oil production.Has now entered the oil field in the late,some wells have reached the limits of mining,conventional thermal oil production technology cannot improve the mining effect.In order to enhance oil recovery fatherly,researching an economy and effective technology to replace steam swallow is the only road for keeping relatively long-term production stable and high.This paper take Jin-90 th block as an example,from the drive mechanism of the foam flooding,laboratory experiments,field experiment and so on,foam flooding oil recovery techniques were studied.Through the three tubes-experiment,the experiment about the influence of flushing efficiency on foaming agent concentration and displacing fluid temperature,and the experiment about plugging effect of nitrogen foam drive under different interstitial-oil saturation;displacement efficiency under different permeability,reasonable and economical foaming agent concentration and temperature,and different plugging effect of nitrogen foam drive under different interstitial-oil saturation are researched.Researches on the technology of nitrogen foam drive have accumulated a wealth of experience to the application and extension,and provide technological reserve for transforming development model at the last stage of developing steam huff and puff in heavy oil reservoir. |
