Abstract: Crews involved in the drilling of an ultra-shallow horizontal well in Weibei Oilfield encountered multiple problems, such as high friction, serious weight on bit (WOB) stack, long drilling cycle and low ROP. Focusing on optimization of casing program, a high quality and high speed (HQHS) drilling technology was developed. Specifically, a casing program with two spudding well sections was used, and φ215.9 mm drill bits were used to drill the second section. The "straight-increase-flat" well trajectory was adopted in order to ensure the hole smoothness and reduce the friction and torque. The inverted BHA was selected to ensure that the WOB could be increased effectively to improve the ROP. In order to avoid or eliminate WOB stack, a potassium amino polymer drilling fluid system was selected to control the friction coefficient to keep the building up section less than 0.08 and the friction coefficient in the horizontal section less than 0.06. Field application in 8 wells showed that the average drilling cycle was 17.81 d, which was 51.06% less than a horizontal well with three spudding well sections in the same block. The HQHS drilling technology for ultra-shallow horizontal wells had been successfully applied in Weibei Oilfield, providing technical reference for effective development of ultra-shallow reservoirs.