Goal of the analysis:
To determine if advanced drilling techniques such as Managed Pressure Drilling (MPD) or Underbalanced Drilling (UBD) are technically and economically feasible to mitigate drilling risks and enhance reservoir performance.
Data required:
- Well design and trajectory information
- Pressure profiles and formation integrity data
- Drilling fluid properties and flow rate data
- Historical drilling performance (including non-productive time)
- Operational cost estimates for MPD/UBD equipment and services
- Reservoir characteristics (permeability, porosity, fluid properties)
Detailed step-by-step instruction on how to conduct the analysis:
1. Review well objectives and drilling environment: Collect well design, reservoir data, and existing pressure profiles to identify potential benefits of MPD or UBD.
2. Evaluate current drilling challenges: Determine the root causes of lost circulation, kicks, or other pressure-related issues that MPD/UBD could address.
3. Assess technical feasibility: Confirm the equipment and technology requirements (e.g., rotating control device, choke manifold) and ensure rig compatibility.
4. Perform cost-benefit analysis: Estimate capital expenditure (CAPEX), operating costs (OPEX), and potential savings from reduced non-productive time and fewer drilling complications.
5. Analyze well control and operational risks: Investigate HSE considerations, failure modes, and contingency plans for managing fluid influx or other hazards.
6. Determine reservoir impact: Model how MPD/UBD might optimize penetration rates and minimize formation damage, potentially improving productivity.
7. Compile feasibility report: Consolidate findings into a recommendation on whether to proceed with MPD/UBD based on risk profile, economic returns, and technical readiness.
Format of the output of analysis:
- A feasibility report summarizing MPD/UBD applicability, expected operational improvements, and cost-benefit outcomes
- Charts comparing conventional drilling performance to projected MPD/UBD scenarios
- Risk register documenting potential hazards and mitigation strategies
- High-level implementation plan with timelines and equipment specifications
How to interpret results:
- Favorable MPD/UBD outcomes typically show reduced non-productive time, fewer well control events, and potentially better reservoir contact.
- High costs or technical constraints may outweigh potential benefits, especially if the current well design or rig setup is incompatible.
- Comprehensive risk analysis helps ensure safe operations while validating the economic and technical justification for MPD/UBD.
Steps a company can take to improve on this measure:
1. Conduct thorough pre-drill planning to identify critical pressure zones and optimize drilling fluid programs.
2. Invest in staff training and technology for MPD/UBD operations, including real-time monitoring and remote operations centers.
3. Adopt robust contingency plans for well control scenarios, ensuring timely detection and safe handling of any influxes.
4. Engage specialized service providers to leverage expertise in MPD/UBD design and execution, reducing implementation risks.
5. Implement pilot projects on lower-risk wells to validate assumptions and refine operating procedures before full-scale deployment.