Water flooding development lead to high pressure in water injection and slow pressure conduction in low permeability oil field.Laboratory study of the relative permeability and reduce the injection pressure of the natural core.Through 0.5% NS-1 surfactant flooding,the follow-up water flooding pressure reduced by 25% or more,step-down effect is obvious.According to the experimental relative permeability curves obtained,under the condition of radial stable seepage flow with two phases of oil and warer.The relationship between surfactant slug size and increasing injection volume was predicted.
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吴景春,欧志杰,吕孝明,等. 低渗透油田表面活性剂增注效果预测方法研究[J]. 科学技术与工程, 2011, (12): . wu jingchun,欧志杰,吕孝明,et al. Study on the Prediction Method for Injection Increase by Surfactant at the Low Permeability Oilfield[J]. Science Technology and Engineering,2011,(12).