东海X16大位移井表层钻井技术

表层海水深钻技术在直井和常规定向井中应用比较成熟，近年该项技术被逐渐应用到大位移井中。如何计算好海水深钻的深度、造斜率、井斜大小，对大位移井的整体井身结构、摩阻扭矩和井眼清洁都起到至关重要的作用。利用海水深钻在直井和常规定向井中的使用经验做好表层作业，同时结合大位移井的特点，从设备能力、轨道选择、井身结构及井眼净化方面进行海水深钻大位移井的设计和施工。结果表明表层海水深钻技术有利于提高大位移井的作业时效，且能够降低摩阻扭矩等各项参数。此技术可为后续作业提供借鉴。

Surface Drilling Technology For X16 Extended Reach Wells in the East China Sea

Surface seawater deep drilling technology is mature in vertical wells and conventional directional wells, and it has been gradually applied to extended reach wells in recent years. How to calculate the depth, build-up rate and deviation of seawater deep drilling, plays an important role in the extended reach well structure, friction torque and borehole cleaning of extended reach wells. Based on the experience of seawater deep drilling in vertical wells and conventional directional wells, perform well surface operations, and combined with the characteristics of extended reach wells, the design and construction of deep seawater extended reach wells are carried out from the aspects of equipment capacity, well trajectory selection, wellbore structure and borehole cleaning.The results show that the surface seawater deep drilling technology is beneficial to improve the aging of extended reach wells and reduce the torque and drag and other parameters. The technology can provide reference for subsequent operation.