At present, most middle deep heavy oil reservoirs in Liaohe oil field are at middle or late stage of cycle s team stimulation(CSS), facing the challenge of the converting development meth ods.

• 目前辽河油田的中深层稠油油藏大多数主力区块已进入蒸汽吞吐的中后期,蒸汽驱是蒸汽吞吐后提高采收率最有效的接替技术。