After steam huff and puff in poor-quality heavy oil reservoir in Henan oilfield, recovery factor is around 15%.A large amount of remained oil has been not produced.

• 摘要河南油田浅、薄层低品位稠油注蒸汽吞吐后，采收率只有15%25左右，大量的剩馀油资源尚未得到有效动用。