Abstract: In the late stage of Fengcheng oilfield’s ultra-heavy oil reservoir development by steam stimulation process, steam drive is an effective process for EOR. Research shows that steam drive process is of oil displacement-drainage effect, i.e. injected steam may form steam chamber by the fact of steam overlapping on the upper part of the reservoir and heating oil, then the oil can be produced from production wells under effects of driving force and gravity. By such a process, three replacing steam drive patterns after steam stimulation are presented, such as vertical well steam drive with short well spacing, vertical well-horizontal well combination steam drive, horizontal well-horizontal well combination steam drive. The pilot test has achieved the anticipated result and further broadened the geological conditions and combination patterns suitable for such a steam drive process. It has the reference significance to development of the similar ultra-heavy oil reservoirs