加拿大萨斯喀彻温省和艾伯塔省稠油储量丰富,但用常规的开采方法采收率极低(6%)。鉴于此,加拿大卡尔加里大学发明一种用热水和烷烃开采稠油的新方法,该方法与蒸汽重力采油(SAGD)法的原理相似。SAGD法的原理是:当蒸汽注入油层后,随着蒸汽的增多而在油藏中形成蒸汽室,蒸汽不断地沿气室周边扩散并冷凝成热水,将周围的稠油加热。加热后的油在重力驱动下流向位于油藏下部的水平井中。但这种方法对那些热量需求高的油 Canada Saskatchewan and Alberta have abundant heavy oil reserves but very low recovery (6%) using conventional mining methods. In view of this, the University of Calgary in Canada invented a new method for producing heavy oil from hot water and alkanes, similar to the principle of the steam gravimetry (SAGD). The principle of SAGD method is that when steam is injected into the oil layer, as the steam increases, a steam chamber is formed in the reservoir, steam continuously diffuses along the periphery of the gas chamber and condenses into hot water, heating the surrounding heavy oil. The heated oil is gravity-driven to the horizontal well located in the lower part of the reservoir. But this method is for those who need high calorie oil