Abstract: The heavy oil reservoir in District No.9 in Karamay oilfield is characterized by multi?set oil reservoirs in vertical, of which the major reservoir Qigu formation has developed by steam stimulation and steam drive processes for 25 years, and now it has entered into production decline stage. In order to keep the stable production of the District No. 9, using directional well technology combined with vertical wells, a set of new well patterns for development of Karamay reservoir has established and successfully solved this problem. The combination and application of directional well and vertical well ensure the implementation of the potential layer design pattern and the integrity of the development pattern in this district, realizing the target of simultaneous development of Qigu reservoir and Karamay reservoir