西南石油大学学报(自然科学版)

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Research and Application of the 3D Horizontal Well Drilling Technology in#br# Changqing Tight Oilfield

Wang Yongming1,2*, Yu Shifu1, Zhou Wenjun1,2, Duan Zhifeng1, Huang Zhanying1,2   

  1. 1. Research Institute of Oil and Gas Technics,ChangQing Oilfield Company,PetroChina,Xi′ an,Shaanxi 710018,China
    2. State Project Laboratory of Low permeability Oil and Gas Exploration and Development,Xi′ an,Shaanxi 710018,China
  • Online:2015-12-01 Published:2015-12-01

Abstract:

The ChangQing Oilfield has resourceful tight oil,and it is an important expiration area for the 50 million tons of oil.
Because the development zone is mainly distributed in geomorphic conditions of staggered hill and loess tableland,to carry out
3D horizontal well drilling with larger offset is necessary. Difficulties in trajectory control,unstable mud shale and increase
torque and drag in drilling,restrict the extend of horizontal technology. In order to resolve the difficulties in 3D horizontal well
drilling technology,and form an effective drilling technology in tight oil exploration,researches are conducted on 3D horizontal
well profile optimization,well bore trajectory control and drilling fluid to form 3D horizontal well drilling technology in tight
oil. First testing is done on YAP 5H horizontal well in CNPC in July. There is no collapse in the layers,the drilling torque and
drag is normal and the wellbore trajectory is smooth,achieving 1 535 m long horizontal section wells and 119.7 m3/d tested oil
yield. It is the first time for the technology innovation and breakthrough from 2D to 3D horizontal well in the tight oil to make
a transformation for the horizontal well development mode and lay a foundation for the effective and economic development of
tight oil in Changqing Oilfield.

Key words: tight oil, 3D horizontal well, profile optimization, wellbore trajectory control, drilling fluid

CLC Number: