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19% Increased drilling efficiency from 61% to 80% between 2010 and 2011

12 Alerts 09 Proposals 02 Programs 01 Recommendations. SPWLA 2012. 4. TRAFFIC LIGHTS METHODOLOGY. NORMAL The well is classified in Normal status when operative conditions and time are within range and according to the plan. p etrolink. ALERTS

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19% Increased drilling efficiency from 61% to 80% between 2010 and 2011

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  1. 12 Alerts 09 Proposals 02 Programs 01 Recommendations SPWLA 2012 4 TRAFFIC LIGHTS METHODOLOGY NORMAL The well is classified in Normal status when operative conditions and time are within range and according to the plan petrolink ALERTS The well is classified in Alert status when operative conditions and time are not within range or according to the plan CRITICAL The well is classified in Critical status when the drilling operation conditions require significant changes within the original drilling program to reach the goal in the well 5 REAL TIME GEOPRESSURE DRILLING PERFORMANCE SYSTEM The system will generate alarms indicating previous drilling events coming from the offset wells in relation to depth, trends and others real time variables COST-EFFECTIVE DECISION IN REAL TIME Pore Pressure and Fracture Gradient in real time Decision C Decision B Decision A Investment(USD) Risk Factor (%) Time (days) DECISION MAKING BY APPLYING REAL TIME METHODOLOGY 6 CASE STUDY LATIN AMERICAN NATIONAL OIL COMPANY – RESULT 2011 IMPACT ON DRILLING OPERATIONS Geological Column Well Schematic Depth vs Days 19% Increased drilling efficiency from 61% to 80% between 2010 and 2011 Real Plan • Reduced numbers of wells from critical to normal condition • Reduce drilling risks using offset well events, logging trends analysis and cross plot in real time • The RTOC provides engineering solutions to increase the control over the drilling process • Real-time engineering empowers the client to prevent and control future drilling events 24Average technical deliverables per well % OF EFFICIENCY BY MONTH 2011 # OF WELLS MONITORED BY MONTH 2011 80% 61% SPWLA 53rd Annual Logging Symposium, June 16-20, 2012 Cartagena Colombia Ref: Ms. No. SPWLA-D-11-00175 Authors: MBA. Rafael Bermudez Martinez. rafael.bermudez@petrolink.com T: +1 713 686 3443 Eng. Concepcion Isidro Olan. concepcion.isidro@petrolink.com PetrolinkServices Inc

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