海油陆采水平井桩147-平1井钻井技术  

Drilling Technology Used in Offshore Development with Onshore Horizontal Well Zhuang 147-Ping 1

作　　者：吕兴辉[1] 李燕[1] 常领[1] 巴涛[1] 

机构地区：[1]胜利石油管理局渤海钻井总公司,山东东营257200

出　　处：《石油钻探技术》2010年第4期125-128,共4页Petroleum Drilling Techniques

摘　　要：桩147-平1井是胜利油田在桩西滩海地区部署的一口重点海油陆采井,同时也是该地区第一口开采沙2段储层的深层水平井。该井井眼尺寸大、水平段长、摩阻大,上部地层泥岩造浆严重,中部砾岩层不稳定,下部地层泥岩易剥蚀坍塌。采用拟悬链线剖面、选用"PDC钻头+单弯螺杆+FEWD"导向钻具组合,控制和监测摩阻与扭矩,降低了摩阻,保证了实际井眼轨迹与设计井眼轨道重合,确保了水平段始终在油层最佳位置穿行;采用短起下钻、分段循环等手段有效清除了岩屑床,保障了井眼清洁和井下安全;采用高效润滑防塌钻井液,根据地层特点合理调整钻井液性能,满足了全井井壁稳定、携岩和润滑的要求;采用在水平段不同位置下入两段筛管而中间可疑层段加管外封隔器的完井方法,提高了水平井的产能。系统介绍了桩147-平1井井眼轨迹控制技术、摩阻与扭矩控制与监测技术、井壁稳定与井眼净化技术、钻井液维护处理措施、完井技术措施。Well Zhuang 147-Ping 1 is an extended reach well for offshore development from onshore located in Zhuangxi area of Shengli Oilfield.It＇s also the first deep extended reach horizontal well of this area to develop Sha-2 reservoir.It has large borehole size,long horizontal section,and large fiction.The upper section is mud-making formation.The intermediate section is unstable gravel layer,and the bottom section is caving shale.The trajectory was a pseudo-catenary curve.FEWD and bent-housing PDM were used to monitor and control the trajectory.The horizontal section penetrated the best reservoir.Short trips and staging circulation were regularly used to clear the cuttings.A serial of measures was taken to adjust mud property to meet the need of borehole stability,cutting transport and lubricating.Friction and torque are monitored and controlled to keep downhole safety.Segregated completion was used to complete the horizontal section.Two sections of screen liner and external casing packer were used to isolate different sections.This paper introduced the design and control of trajectory,the control and monitoring of friction and torque,the maintaining hole stability and hole cleaning,the drill fluid,completion technique etc.It provides experience for design,drilling and completion of horizontal wells in Zhuangxi area.

关 键 词：水平井 井眼轨迹 井眼净化 井眼稳定 桩147-平1井 

分 类 号：TE243[石油与天然气工程—油气井工程]