摘要
为了解决连续管钻井定向过程中存在的工具面角调整偏差问题,提出了两段式定向施工设计方法。以斜面扭方位计算模式为理论基础,根据工具面角的调整特点,建立了双圆弧定向轨道设计模型,利用数值迭代法对其轨道约束方程组进行求解,从而得到符合定向设计要求的井眼轨道方案。实例计算结果表明,工具面角调整符合定向调整特点,设计的井眼轨道光滑,满足各项井眼约束条件。研究结果表明,两段式定向施工方法理论设计切实可行,符合定向要求,解决了连续管定向偏差问题,具有现场实际应用价值。
In order to solve the problems in tool face orientation with coiled tubing drilling ,this paper presents a method to drill a directional well with a two‐section design .Based on the theory of azimuth cor‐recting on an inclined‐plane and the skill of re‐orientating the tool face ,a two‐arc directional design model was established ,and the corresponding constraint equations set for trajectory deign could be solved using numerical iteration method ,so as to finalize the well trajectory design which would meet the requirements of directional drilling .Calculation results from an actual well design showed that re‐orientation of tool face could meet the requirements of directional drilling ,and the well trajectory was designed as a smooth curve within the all constraints of the well .The study results concluded that the two‐arc directional design model could meet the needs of directional drilling and the theoretic design was feasible in drilling practice ,so problems with di‐rectional correction had been solved that would be useful to the drilling practice on location .
出处
《石油钻探技术》
CAS
CSCD
北大核心
2015年第2期50-53,共4页
Petroleum Drilling Techniques
基金
国家科技重大专项"复杂结构井优化设计与控制关键技术"(编号:2011ZX05009-005)资助
关键词
连续管
液压定向器
工具面调整
数值计算
coiled tubing
hydraulic orientator
tool face adjustment
numerical calculation
