连续管空气钻井排屑能力分析
The Analysis of Cuttings Removal Ability in Air Drilling with Coiled Tubings
DOI: 10.12677/JOGT.2018.403084, PDF,    国家科技经费支持
作者: 张国锋：中石化江汉石油工程有限公司工程技术研究中心，湖北 武汉
关键词: 空气钻井；连续管钻井；岩石分形；Weibull分布；拖曳力；Air Drilling； Coiled Tubing； Rock Fractal； Weibull Distribution； Drag Force
摘要: 使用连续管进行空气钻井，关键是要将破碎的岩石颗粒循环出井筒。岩石在井底破碎后，形成大小不一的岩石颗粒，根据岩石破碎的分形理论，岩石破碎后的形状是自相似的，粒径符合Weibull分布规律。应用BWRS方程计算空气密度，Lemmon方法计算空气黏度，Weibull分布规律拟合粒径分布，用Bagheri非球形颗粒拖曳力关系式计算岩屑空气阻力和井筒中的空气速度、压力分布，以及连续管钻井的井口压力。计算的携岩最小流量与文献值相符，证明了连续管空气钻井的可行性。
Abstract: In air drilling with coiled tubings, the key was to recycle broken rock particles out of the wellbore. According to the fractal theory of rock fragmentation, the shape of rock was self-similar, and the particle size conformed to the law of Weibull Distribution Law. The BWRS equation was used to calculate the air density and Lemmon method was used to calculate air viscosity and Weibull Distribution Law to fit the particle size distribution. The drag force relation of Bagheri non-spherical particles was used to calculate the air resistance of cuttings and the air velocity and pressure distribution in the wellbore, and the wellhead pressure of coiled tubing drilling. The minimum flow rate calculated with the algorithm presented in this paper is in good agreement with the flow rate in the literature. The feasibility of air drilling with coiled tubing is also proved.
文章引用：张国锋. 连续管空气钻井排屑能力分析[J]. 石油天然气学报, 2018, 40(3): 190-197. https://doi.org/10.12677/JOGT.2018.403084

参考文献

[1] 王立超, 范光永, 张秋菊. 空气钻井技术在伊朗项目TBK油田的应用[J]. 西部探矿工程, 2004, 16(11): 83-84.
[2] 项德贵, 余金海, 赖晓晴, 等. 空气钻井在玉门青西油田的应用[J]. 西部探矿工程, 2006, 18(6): 178-180.
[3] 张金成, 位华, 于文红. 空气钻井技术在普光气田的应用[J]. 石油钻采工艺, 2006, 28(6): 8-10.
[4] 胡小房. 干空气钻井中环空携岩理论研究[J]. 石油钻井工程, 1996(2): 1-7.
[5] 刘绘新, 孟英峰. 空气雾化钻井环空携岩流动试验研究[J]. 西南石油大学学报(自然科学版), 2001, 23(3): 34-36.
[6] 朱红钧, 林元华, 明传中, 等. 空气携岩能力数值模拟分析[J]. 钻采工艺, 2010, 33(6): 29-30, 35.
[7] 黄小兵, 陈次昌, 董耀文. 气体钻井的岩屑特征及粒度分布测试[J]. 天然气工业, 2008, 28(11): 83-84.
[8] 刘毅, 周绍骑, 韩开进, 等. 基于BWRS方程的压缩空气压缩因子计算[J]. 后勤工程学院学报, 2014(4): 66-71.
[9] 张家荣, 赵廷元. 工程常用物质的热物理性质手册[M]. 北京: 新时代出版社, 1987.
[10] Lemmon, E.W. and Jacobsen, R.T. (2004) Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air. International Journal of Thermophysics, 25, 21-69. [Google Scholar] [CrossRef] 
[11] 巫尚蔚, 杨春和, 张超, 等. 基于Weibull模型的细粒尾矿粒径分布[J]. 重庆大学学报, 2016, 39(3): 1-12.
[12] Bagheri, G.H. and Bonadonna C. (2016) On the Drag of Freely Falling Non-spherical Particles. Powder Technology, 301, 526-544. [Google Scholar] [CrossRef]