Horizontal and Complex-Trajectory Wells

摘要

Following the downturn, the number of horizontal wells drilled this year has fallen dramatically compared with previous historic levels. In these difficult times, attention to cost reduction through relentless optimization of all segments, from drilling to completions, has never been so important. Horizontal-well costs have decreased significantly over the last few years thanks to many lessons learned. In unconventional plays, multiple solutions have been implemented and tested in well construction, casing design, hole size, bottomhole assemblies (BHAs), directional systems, drillpipe, oscillation techniques, drill bits, well trajectory, and pad drilling, with the main goals being greater efficiency and reduction of costs.