Study on developed producing reserves of marginal heavy oil reservoir in mid-deep thin layers--By taking Chun-10 well block of Chunguang oilfield as an example

Chun-10 well block of Chunguang oilfield is a typical marginal heavy oil reservoir and has the characteristics of deep buried depth,thin thickness,high viscosity of crude oil and less oil bearing layers,by adopting the conventional developed producing technology,it is difficult to realize economic and effective reservoir development.Since 2011,through policy limit study on economic and technological development of horizontal wells,the horizontal wells have been determined.Steam stimulation + steam drive development way has been adopted to produce 568 x104 t reserves and 99 horizontal wells have been successfully deployed in the block.The new expected capacity is about to be 16.6 x104 t and good development effect has been achieved.