石油钻采工艺2016，Vol.38Issue(1)：18-22,5.DOI:10.13639/j.odpt.2016.06.005
长水平段水平井钻进摩阻控制
Control of friction resistance in drilling of horizontal well with long horizontal section
摘要
Abstract
The horizontal well with long horizontal section can increase the length and quantity of oil reservoir encountered and can raise the single well production of oil and gas, so that it enjoys obvious technical advantage in development of thin reservoir and the offshore and onshore development. However, owing to the long horizontal section, in the course of drilling operation, the serious friction resistance problem will be encountered. Taking a horizontal well with long horizontal section in Shengli Oilifeld as example, the ifnite element method is used to analyze its inlfuence law for and inherent inlfuence mechanism for friction resistance from the viewpoints of optimization of wellbore section structure parameter and selection of drilling operation parameters. The research results indicate that, the curvature radius of building-up section of such well has relatively obvious inlfuence on friction resistance of horizontal well with long horizontal section, so that it should be selected properly after considering the characteristics of formation, the dififculty in control of building-up rate and the drill-pipe delivery capacity in later phase, too quick raising of drill pipe will lead to serious friction between drill pipe and well wall on building-up section, and in the course of lowering of drill pipe, the relationship among lowering efifciency, deformation of drill pipe and friction resistance shall be properly balanced, so as to prevent the drill pipe from being jammed. In the course of combined drilling operation, the speed of rotary table in low-speed area will not cause obvious change in friction resistance.关键词
水平井钻进/长水平段/摩阻/曲率半径/起下钻/控制Key words
drilling of horizontal well/long horizontal section/friction resistance/curvature radius/trip/control分类
能源科技引用本文复制引用
刘清友,敬俊,祝效华..长水平段水平井钻进摩阻控制[J].石油钻采工艺,2016,38(1):18-22,5.基金项目
国家自然科学基金重点项目“气体钻井技术基础研究”（编号51134004）。 （）
