伊拉克米桑油田深井水平井钻井技术

Drilling Technologies for Deep Horizontal Well in Iraq Missan Oilfield

为应对伊拉克米桑油田深井水平井高压盐膏层盐水侵,下部灰岩地层漏、喷、塌和卡等多种风险,同时尽可能降低钻井成本,提高作业时效,在64H井开展了深井水平井研究和实践。根据区块作业经验将深井水平井设计为六开井身结构;针对高压盐膏地层,采用高密度饱和复合盐钻井液技术;在深部灰岩地层实施了一系列定向井和尾管固井技术。解决了该区块钻井过程中的技术难题,提高了钻井安全性和时效,打破了米桑油田深井水平井钻井记录。

To deal with the various risks of high pressure salt-gypsum layer salt contamination and leakage,blowout,collapse and drill pipe sticking in lower limestone formation of deep horizontal well in Iraq Missan oilfield,as well as to reduce drilling cost and improve drilling efficiency,the research and operation on deep horizontal well are carried out in well 64H.Based on the block operation experience,the deep horizontal well is designed as a 6-spud well structure,the high-density saturated compound salt drilling fluid technology is adopted for high-pressure salt-gypsum layer,and a series of directional well and liner cementing technologies are implemented in deep limestone formation,which solve the drilling technical difficulties in this block,improved the drilling safety and efficiency and created a new drilling record of deep horizontal wells in Missan oilfield.