Operator improves drilling efficiency and gains access to previously undrillable reservoir targets

• Production induced pore pressure depletion and fracture gradient reduction
• High mud weight is still needed for wellbore stability → High ECD
• Narrow margin exists between wellbore stability and fracture gradient → Lost circulation
• Narrow margin has lead to high percentage of NPT → 25% of operating time
• Proven reserves are conventionally unrecoverable → In the range of 100 MMboe

• Optimize drilling by analyzing and modeling wellbore hydraulics
• Reduce the static mud weight below pore pressure to rediuce the ECD
• Manage pressure while drilling with the Dynamic Annular Pressure Control system
• Reconfigure riser for closed circulation drilling with the HOLD 2500 RCD
• Perform HAZID / HAZOP workshops and train rig personnel

Five wells have been successfully drilled and reached previously undrillable targets
Drilled with reduced mud weight was and increased flow rate
Lower ECD eliminated and pressure control eliminated lost circulation
Pressure stability eliminated wellbore stability events
Drilling cost and non-productive time were significantly reduced
The BHP was held in +/- 0.2 to 0.3 ppg window 95% to 97% of all pump cycles