Producing practice of super heavy oil reservoir and its effect in Henan oilfield

The reserve of super heavy oil reservoir with high viscosity of Henan oilfield is about 1088.19×104 t. However, the conventional steam stimulation method adopted at present failed to meet the requirements of thermal production and had a poor production effect. In spite of through injecting nitrogen to insulate heat or by injecting viscosity reducer, the recovery could be increased little, but breakthrough still can not be made, which makes it difficult to produce the super heavy oil reserves. Based on the advanced technology of super heavy oil development in China, proper production technology suitable for heavy oil characteristics of Henan oilfield, such as high steam quality and high speed, has been optimized, which can effectively increase the production capacity of super heavy oil in Henan oilfield.