Executive Summary
| Metric | Result |
|---|---|
| Operator | Confidential (Offshore Operator, Campos Basin, Brazil) |
| Challenge | Optimizing PDC bit selection and drilling parameters |
| Solution | i-DRILL case study dynamic analysis and bit optimization |
| Time Saved | 2.6 days per well |
| Cost Savings | $1.3 million per well |
| ROP Improvement | 100% increase |
| Vibration | Minimized across all modes |
Introduction: The Power of i-DRILL Case Study Results
This i-DRILL case study demonstrates how advanced dynamic analysis transforms drilling operations. An operator in Brazil’s Campos Basin was facing severe vibrations, poor ROP, and high NPT. Through comprehensive bit selection and parameter optimization, i-DRILL case study results show 100% ROP improvement and $1.3 million savings per well.
According to the Society of Petroleum Engineers (SPE), optimized drilling parameters can reduce NPT by 20-30%. This i-DRILL case study validates these findings with real-world results.
Check out our DIGITAL TWIN platform that complements i-DRILL.
The Challenge: Brazil Offshore Drilling Problems
An operator in Brazil’s Campos Basin was planning to drill a challenging section through interbedded formations. Previous wells experienced:
| Problem | Impact |
|---|---|
| Severe vibrations | BHA failures |
| Poor ROP | Less than 5 m/hr average |
| Multiple bits | 2-3 bits per section |
| High NPT | Drilling dysfunctions |
The team needed to optimize both bit selection and drilling parameters while maintaining wellbore quality. This i-DRILL case study documents how they achieved breakthrough results.
For more on drilling challenges, read our digital twin case study.
The Solution: i-DRILL Dynamic Analysis
The i-DRILL case study team conducted comprehensive dynamic analysis comparing three PDC bit designs:
| Bit Model | Characteristics |
|---|---|
| MDi613 | 6-blade, 13mm cutters, standard gauge |
| MDi616 | 6-blade, 16mm cutters, enhanced gauge |
| MDSi813 | 8-blade, 13mm cutters, shaped cutters |
4-Step Analysis Process
Step 1: BHA Modeling
i-DRILL created detailed dynamic models including bit characteristics, stabilizer placement, drill collar dimensions, and formation properties from offset wells.
Step 2: Operating Window Analysis
For each bit, i-DRILL case study analyzed the stable operating window across RPM range (60-180) and WOB range (5-25 klbf).
Step 3: Vibration Mode Assessment
The system evaluated susceptibility to lateral vibrations (bit whirl), torsional vibrations (stick-slip), axial vibrations (bit bounce), and coupled modes.
Step 4: ROP Prediction
Based on formation properties and bit characteristics, i-DRILL predicted expected ROP for each design under optimal parameters.
Research from IADC drilling guidelines confirms the importance of comprehensive dynamic analysis.
The Results: 100% ROP Improvement
Bit Selection Analysis
| Bit | Stable RPM | Vibration Risk | Predicted ROP |
|---|---|---|---|
| MDi613 | 90-120 RPM | Moderate lateral | 8 m/hr |
| MDi616 | 100-140 RPM | Low | 12 m/hr |
| MDSi813 | 80-110 RPM | High stick-slip | 10 m/hr |
Recommendation: MDi616 with 16mm cutters provided the best combination of stability and performance in this i-DRILL case study.
Parameter Optimization
For the selected MDi616 bit, i-DRILL identified the optimal operating window:
- WOB: 12-18 klbf
- RPM: 110-130
- Flow Rate: 1,200-1,400 GPM
Field Results
| Metric | Previous | i-DRILL Optimized | Improvement |
|---|---|---|---|
| Average ROP | 5 m/hr | 10 m/hr | +100% |
| Section Time | 5.2 days | 2.6 days | -2.6 days |
| Bits Used | 2-3 per section | 1 per section | -60% |
| Vibration | Severe | Minimal | Eliminated |
| Bit Dull Grade | 3-3 WT | 0-0 NO A | Excellent |
Visit Schlumberger’s drilling technologies and Baker Hughes solutions for more on bit optimization.
Cost Savings: $1.3 Million Per Well
| Cost Category | Savings |
|---|---|
| Rig time saved (2.6 days @ $500k/day) | $1,300,000 |
| Bits saved (2 bits @ $30k each) | $60,000 |
| BHA damage avoided | $100,000 |
| TOTAL | $1,460,000 |
Net savings per well: $1.3 million
This i-DRILL case study demonstrates 8x ROI on the technology investment.
Customer Testimonial
*”The i-DRILL analysis completely changed our approach. Instead of trial-and-error, we had a science-based recommendation that worked the first time. Doubling ROP and saving 2.6 days per well—that’s transformational.”*
— Drilling Engineering Manager
Technical Insights: Why MDi616 Worked
16mm Cutters Provided:
- Greater depth of cut capability
- Better impact resistance in interbedded formations
- Improved cleaning efficiency
Enhanced Gauge Design:
- Improved lateral stability
- Reduced whirl tendency
- Maintained hole quality
Parameter Sensitivity
The analysis revealed previous parameters (low RPM, high WOB) were promoting stick-slip. The optimal window (110-130 RPM, 12-18 klbf WOB) kept the bit stable while maximizing ROP.
Learn more about i-DRILL software for complete drilling optimization.
Lessons Learned
Key Success Factors
- Comprehensive modeling considering all vibration modes
- Bit-BHA interaction analysis, not just bit alone
- Formation-specific optimization
- Parameter sensitivity understanding
Replication Potential
This i-DRILL case study workflow has been successfully applied to:
- 8 additional wells in the same field
- 3 different bit sizes (12¼”, 8½”, 6″)
- Multiple formation types
Average Results Across Applications:
- ROP improvement: 85%
- Time savings: 2.1 days per well
- Bit life increase: 2x
Conclusion: Transform Your Drilling Operations
This i-DRILL case study demonstrates the power of dynamic analysis:
- ✅ 100% ROP improvement
- ✅ 2.6 days time savings per well
- ✅ $1.3 million cost reduction per well
- ✅ Excellent bit condition (0-0 dull grade)
These results are not isolated—they represent what’s possible when drilling decisions are guided by comprehensive dynamic analysis rather than trial and error.
Ready to achieve similar results? Contact our team to schedule a technical consultation.
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References