RESEARCH OF MATCHING TECHNOLOGY FOR IMPROVING THE STEAM SOAKING EFFECT

As time goes by, many problems have been exposed during heavy oil recovery with huff and puff technology. These problems have been tackled successfully in Liaohe Oilfield through hard study and a series of matching technology for improving the huff and puff effect has been developed. This paper briefly introduces the application results in 4 blocks of the 5 matching technologies:research of improving huff and puff effect through optimizing parameters; profile control by temporarily blocking at high temperature; selective injection of steam into individual zones; improving huff and puff effect with chemical additives; and application research of lift with hollow rod pump. These technologies have played an active part for improving the ultimate oil recovery of heavy oil in Liaohe Oilfield.