Abstract: In order to accommodate the realities of the geographical environment and goals of developing shale gas in a highly efficient way, the Fuling Shale Gas Field has adopted the "well factory" mode that includes drilling 3D horizontal wells with both medium and long. The original profile design was not appropriate for drilling horizontal wells efficiently, and it is difficult to control 3D well trajectory, due to high drag and torque. Through the optimization of the profile design, combined with 3D horizontal well trajectory control technology and drag reducing technology, the rate of penetration for 3D horizontal wells has been raised, and the drilling cycle shortened. Field application results demonstrate that this technology is remarkably efficient in the Fuling Shale Gas Field, where it reduces the operation time of the second section of 3D horizontal wells by 46.36% and that of the third section by 5.76%.