DRILLING TECHNOLOGY OF LONG-DISPLACEMENT DIRECTIONAL WELL FOR ZHAODONG WELL F-1

Zhaodong well F-1 is the first four-section directional exploration well in Dagang oilfield, so far its lateral displacement is the longest onshore in China. The well had four targets, its final depth is 4420m, the vertical depth is 3329. 02m, the lateral displacement is 2624. 7m, the highest deviation angle is 52. 48°; the well hit the target precisely with 17. 94m discrepancy(largest) in target area and 2. 3° deviation(largest) between the hole trajectory and designated line. It took only 79d to complete the extremely difficult high angle directional well safely with high grade by using the electric rig and top drive drilling equipment, optimized bottom hole assembly and perfect performance of drilling fluid. The job procedures and technical measures were introduced in detail.