渤海三维双靶高难度定向井钻井工艺

DRILLING TECHNOLOGY OF HIGH DIFFICULTY THREE DIMENSIONAL DUAL TARGET DIRECTIONAL WELL IN BOHAI GULF

文章总结了渤海首次钻成的三维双靶大斜度定向井ＱＫ１８—１—Ｐ４井钻井工艺。该井测深４７３５ｍ，垂深３３８１７ｍ，水平位移２５４０ｍ，最大井斜６２９７°，最大狗腿９４°／３０ｍ。ＱＫ１８—１—Ｐ４井采用了顶部驱动技术、ＭＷＤ测量技术、大功率可控马达技术、ＰＤＣ钻头技术、大斜度井液压分接箍固井技术、油层及环境双保护钻井液技术、整体式组装井口技术、大斜度及水平井测井技术，为渤海开发复杂地质条件下的油气藏，提高渤海钻井工艺技术，积累了成功的经验，并奠定了坚实的基础。

The drilling technology of the three dimensional dual target high angle directional well (well QK18-1-P4) which was first successfully drilled in Bohai Gulf is summarized in this paper.The well′s lateral depth is 4 735 m,vertical depth 3 381.7 m,horizontal displacement 2 540 m,maximum deviation 62.97° and maximum dog leg 9.4°/30 m.The following techniques were adopted for the well QK18-1-P4;i.e.the top drive,measurement while drilling (MWD),large power controlled motor,polycrystalline diamond compact (PDC)bit,hydraulic divided coupling cementing,drilling fluid protecting both environment and reservoir,integral installation wellhead and high angle and horizontal well logging techniques,etc.Through our drilling this well,some successful experiences have been accumulated and a solid foundation has been established for developing oil and gas reservoirs with complicated geological conditions and enhancing drilling technology in Bohai Gulf.