Well Planning Considerations

Well Planning Considerations

Mani Khaghani Mani Khaghani

Mani Khaghani

Founder at Envirolize Global Technologies

发布日期: 2016年7月14日
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Well Planning Considerations:

  • Surface location selection
  • Target depth, location, and required intersection details
  • Target size, survey accuracy requirements
  • Formation characteristics/ Salt, hard bands, etc
  • Directional drilling and surveying technology
  • Logging requirements
  • Required placement of production equipment
  • Well bore pressures and temperatures
  • Mud program
  • Bit program, vibration logs, etc
  • Pumps- flow rates/ depth/ pressure for motor operations
  • Well profile selection: 2D if possible, least tortuous
  • Kick-off point and well profile harmonized with well sections
  • Minimum 20 degree inclination
  • Hole direction section
  • Bit changes and BHA changes at the same time
  • Rotary drillings as much as possible
  • Logging program as function of hole angle
  • Drill string design for over pulls, torque and buckling
  • Avoid/ minimize critical hole cleaning angle range 45-65 degree

Well Planning Considerations: Geological factors

Structural issues:

  • Formation types and tops ( salt )
  • Marker zone presence
  • Dip angle(s)
  • Natural deviation tendencies   
  • Drilling problems  
  • KO constraints                                    

Reservoir Description:

  • Bed thickness of pay zone
  • Gas, oil, and water contact depth
  • Permeability
  • Fracture orientation ( if any )         

 

Well Planning Considerations: Well Profile

  • KO depth
  • Vertical depth of target
  • Horizontal displacement to target from surface location

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