西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

小井眼长水平段水平井摩阻扭矩控制技术

何世明1,汤明1 *,熊继有1,郑锋辉2,邓红琳3   

  1. 1.“油气藏地质及开发工程”国家重点实验室· 西南石油大学,四川成都610500
    2. 中国石化华北石油工程有限公司,河南郑州450006
    3. 中国石化华北分公司工程技术研究院,河南郑州450006
  • 出版日期:2015-12-01 发布日期:2015-12-01
  • 通讯作者: 汤明,E-mail:tm4432@126.com
  • 基金资助:

    国家科技重大专项(20011ZX05045 03 01WX,2008ZX050450307HZ);国家自然科学基金(51474186,51574202)。

Friction and Torque Control Technology For Slim and Long#br# Horizontal Well

He Shiming1, Tang Ming1*, Xiong Jiyou1, Zheng Fenghui2, Deng Honglin3   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Petroleum Engineering Company of North China,SINOPEC,Zhengzhou,Henan 450006,China
    3. Engineering Technology Research Institute of North China,SINOPEC,Zhengzhou,Henan 450006,China
  • Online:2015-12-01 Published:2015-12-01

摘要:

小井眼长水平段水平井+ 分段压裂的开发方式在大牛地气田的开发中取得了理想效果,然而仍然存在一系
列的问题,尤其是水平段后期的摩阻扭矩控制问题。以理论分析和实钻工程特征为基础,建立了摩阻扭矩分段计算
模型,并对水平段长度、轨迹剖面、钻具组合和钻井液流变性等影响规律进行了分析,结果表明:随着水平段长度的增
加,钻进和起钻的摩阻扭矩均在增加,当摩阻扭矩不再增加时,此时便是水平段的极限长度;随着单增剖面靶前位移的
增加,摩阻扭矩增加;采用组合钻杆(?101.6 mm/?114.3 mm+?88.9 mm)既有利于水平段和大斜度井段携岩,同时又能
有效地控制摩阻扭矩;钻井液屈服值和塑性黏度越低,摩阻扭矩越小。将摩阻扭矩综合控制技术应用于DPH7 井,水
平段轨迹平稳,平均全角变化率1.79°/30 m。

关键词: 小井眼, 长水平段水平井, 摩阻扭矩, 软杆模型, 钢杆模型, 连续梁

Abstract:

The development mode of Slim-and-long-section horizontal well with staged fracturing approach in Daniudi Gas
Field has achieved the desired effect,however,there are still a series of problems,especially friction torque control problems
for the later part of the horizontal section. In this paper,based on theoretical analysis and practical drilling engineering features,
segmented calculation model for drag and torque is established,and influencing rules are analyzed,such as horizontal section
length,trajectory profile,BHA and drilling fluid rheology,etc. The results show that with the increase of horizontal section
length,friction and torque of drilling or POOH increases. When the friction torque does not increase,the length of the horizontal
section reaches limitation. With increase of before A target displacement,friction and torque also increase. In addition,using
combinations of drill pipe(101.6 mm/114.3 mm+88.9 mm)is not only conducive to carry rocks for high deviation angle and
horizontal section,but also available to effectively control the friction and torque at the same time. The lower the yield value
and plastic viscosity of drilling fluid,the lower friction and torque. Applying friction torque control technology to DPH7,
horizontal section trajectory is smooth,and the average dogleg is 1.79°/30 m.

Key words: slim-hole, long Horizontal section, friction and torque, soft-string model, stiff-string model, continuous girder
model

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