DRILLING TECHNOLOGY OF SHW-01 DEEP HORIZONTAL WELL

The first deep horizontal well SHW-01 well was drilled in Shixi reservoir, Xinjiang Oilfield with a final true depth of 4 800.10m, the vertical depth 4 385.20m, deviation 90.3°, closed azimuth 7.06° and displacement 550.33m. 339.7mm surface casing of the well was set at 500m, φ244.5mm intermediate casing strings was set at φ216mm hole drilling was performed, at first deflecting at a depth of 4 060m, stuck at 4 390.18m (deviation angle: 69°), and the well had to be cemented after ineffective treatments. Then sidetracked at 4 066.21m, employed Dyna-drill with double or single Bend Sub to increase the hole angle, and entered the horizontal section at a depth of 4 472.05m (deviation angle:88°). Finally run into the window of horizontal section with surface rotation and single stabilizer drill at a depth of 4 484.70m, while steadily drilling was kept well. Because of the wlnter drilling and complexity of downhole, the well was completed ahead of time for assurance of safety. The combined production casing of φ177.8mm×4 288.43m+φ139.7mm×503.67m were used, the hydrocarbon reservoir was completed with the structure of ported casing alternated with conventional casing.