老168区块是中石化大型海油陆采重点开发的丛式井组,设计总井数69口,其中大部分是水平位移在1500米以上,最长的达2000多米的大位移井。本区大部分井都是浅层大井眼定向,完全采用海水配浆,对钻井液的要求很高。本文主要从降低摩阻和扭矩技术、井眼清洗技术、井身剖面和钻柱优化设计、井壁稳定技术这几个方面介绍下该区的钻井应用技术。 Block 168 is a cluster type well developed mainly for the large-scale CNOOC land reclamation. The designed total well number is 69, most of which are large displacement wells with a horizontal displacement of more than 1,500 meters and the longest of more than 2,000 meters. Most of the wells in this area are oriented by shallow and large boreholes, and seawater is fully used for slurrying, which requires high drilling fluid. This article mainly introduces drilling application technology in this area from the aspects of friction reduction and torque reduction technology, wellbore cleaning technology, wellbore profile and drill string optimization design and wellbore stabilization technology.