Abstract: The heavy oil reservoirs of Qigu Formation in block Jiu9 of Karamay Oilfield is shallowly buried and loosely
consolidated，which leads to serious steam channeling and sand production and thus impedes the well production. The reservoir
has come into middle and later stage of steam soak production. It takes on characteristics as high water-cut，low production，
edge and bottom water invasion，which accelerate production decline，and make the exploitation difficult and the benefit of
development is descending. In order to improve the reservoir development，a typical well group is chosen for studying. With
the application of reservoir numerical simulation，a detailed study is done on the design of exploitation projects and index
forecasting. The simulated results accord with the reality of the oilfield exploitation. The research indicates that oil recovery
of the reservoirs of Qigu Formation in Block Jiu 9 of Karamay Oilfield will certainly be enhanced if continuous steam-flood is
adopted after steam soaking.

Key words: heavy oil reservoir, numerical simulation, history match, steam soak, continuous steam-flood