Overview
- Current Anti-Collision Practices
- Williston Basin Overview
- Geologic Considerations and Planning
- Risk Management
- Drilling Consideration
- Stoplight Method
- Case Studies
- Conclusion
Anti-Collision Industry View
- Standard view errs towards avoidance mentality:
- Total Avoidance
- Azm. Avoidance
- Limited support and documentation for alternative processes when avoidance is not an option.
Anti-Collision Case Study
- Williston Basin
- 13,000 vertical wells,
- 15,000 horizontal wells,
- 1,000 re-entry/directional wells.
- Developed for horizontal drilling across pre-existing horizontal wellbores in the Williston Basin.
- Drilled as close as 10 feet wellbore - wellbore
Geologic Considerations
- Anti-Collision Program Constraints
- Laterally Continuous Formation
- Well Control
- Quality Data
- Clear Steering Markers
- Gamma
- Resistivity
Geologic Planning
- Anti-Collision Methodology
- Reinterpretation
- Profiles
- Structure
- Organization of Stratigraphic position
- Wellbore Placement
- Target Selection
- Reinterpretation
Drilling Considerations
- Risk Management Program
- Potential Risks
- Impact vs. Probability
- Common Indicators
- Operational Parameters
- Geologic
- Directional/Survey
- Survey Error
- Ellipse of Uncertainty
- Potential Risks
...
View the entire Presentation:
Erin Britton & Rachel Grande