Enhanced Foam Flooding Pilot Test in Chengdong of Shengli Oilfield: Laboratory Experiment and Field Performance

As the second largest oilfield in China, Shengli oilfield has been one of the largest oil-bearing regions performing polymer<br>flooding in the world. However, varieties of reservoirs and complex reservoir conditions in part of blocks have been the<br>obstacle in performing polymer flooding. At the same time, those blocks where polymer flooding has been conducted are<br>facing the problem of how to improve oil recovery further.