提出一套筛选和评估稠油蒸汽驱的简易方法，介绍了若干个筛选准则．经初步筛选后，提出了预测油汽比或其倒数（汽油比）的简单关系式，并对国内三个油藏的汽驱效果进行了评估和预测计算。 A simple method for screening and evaluating heavy oil steam flooding was proposed. Several screening criteria were introduced. After a preliminary screening, a simple formula for predicting the oil-steam ratio or its reciprocal (gasoline-to-gasoline ratio) is proposed. The gas flooding effects of three reservoirs in China are estimated and predicted.