Abstract: Steam stimulation is a kind of economic and effective process for improving production of heavy oil. In District 9-(7) in Karamay oilfield, the viscosity of gas-free crude ranges from 2 400 mPa·s to 961 000 mPa·s at 50℃, averaging 452 029 mPa·s, belonging to super heavy oil. Based on these characteristics, the numerical simulation technique is applied to study of the main parameters given by steam stimulation process, including optimized calculation of the parameters such as steam injection intensity, steam injection velocity, cyclic steam injection volume, steam injection pressure, shut-in time and steam quality, as well as recommended the optimized program. The steam stimulation responses from the steam huff and puff wells are forecasted, obtaining the cycle production rates in different cycles. The results can be as a guide for super heavy oil production in District 9-(7) by steam stimulation process.

Key words: super heavy oil, steam stimulation, steam huff and puff, numerical simulation, parameter optimization