Research and application of deep borehole trajectory control technology in highly deviated wells of Jidong oilfield

In view of deep wells characteristics in Jidong oilfield,such as complex casing program,drilling out multiple sets of strata series,many design targets,etc.,there is huge challenge for drilling borehole trajectory control.Through directional kick off characteristics analysis of steering drilling tools association and single centralizer association,problems analysis encountered in the process of trajectory control,research of natural deflecting in different blocks and azimuth drift regularity,a set of borehole trajectory control technology suitable for highly deviated wells has been developed.The technology can solve many difficulties existed in the process of trajectory control drilling,and lay a foundation for the deep reservoir exploration and development.