The Surveying Conundrum
- Geographically defines the wellbore
- Drilling safely
- Achieves geological Objectives
- Delivers engineering objectives
- Time consuming
- Increased pump cycles
- Reducing borehole quality
- Stuck pipe exposure
Measurement While Drilling — Current and Future
- 1979
- MWD measurement
- 6 axis (3 accelerometers and 3 magnetometers)
- Robust reliable and auditable
- Survey taken when stationary
- Time penalty
- 2001
- Continuous single-axis surveying
- Improved trajectory control
- Not definitive without static surveys
- 2019
- Continuous 6-axis surveying
- Definitive survey taken while drilling
- No “survey time”
- Reduced pump cycles
- Improved directional control
Continuous 6-Axis Surveys — Drilling Mode Surveys (DMS)
- Continuous 6-axis surveying challenges
- Phase compensation
- Shock and vibration
- Eddy currents
Continuous 6-Axis Surveys — Drilling Mode Survey Design Journey
- Firmware
- Single correction for all errors
- Separating
- Phase shift
- Shock and vibration
- Eddy current compensation
- Hardware
- Improve mag frequency response
- Accelerometers already capable
...
View the entire Presentation:
Eliminating Rig Time from MWD Surveying
Ross Lowdon, M. Breen et al., Schlumberger