前　　　言为有效、经济地开采稠油 ,不仅需要加热降粘 ,还需要保持必要的驱油能量。采用长距离水平井或循环注入蒸汽的方法 ,提高了流体流动性 ,但采收率有限。最近发展的蒸汽驱及ＳＡＧＤ方法同样也能保持油层的驱动能量和高的采收率 ,但所耗热能大 ,而且仅应用在优质储层内? Foreword In order to effectively and economically exploit heavy oil, it not only needs to be heated to reduce viscosity, but it also needs to maintain the necessary displacement energy. The use of long-distance horizontal wells or cyclic injection of steam increases fluid flow but with limited recovery. The recently developed steam flooding and SAGD methods also maintain the drive energy and high recovery of the reservoir, but do they consume large amounts of heat and are only used in high-quality reservoirs?