Strategy for Successfully Drilling and Completing Wells on a Multi-Well Pad Alan Vasicek Apache Corporation

Alan Vasicek Bio Introduction Apache Corporation Worldwide Drilling – Houston, TX Global Directional Drilling Advisor DD Manager, DDC, Sr DD, M/LWD, Multi-laterals – 34 yrs BS Petroleum Engineering, University of Texas Strong driver of drilling optimization, performance improvement, new technology and applying engineering principles to directional drilling ConocoPhillips Ekofisk/Eldfisk offshore Norway project with extensive anti-collision work

MultiWell Pad Challenges Old vertical wells w/poor or no surveys Existing and future surface facilities Existing pipelines On-Lease pads and Off-Lease pads Offset operators drilling and completions activities – current and future Limitations on directional work for production – max doglegs, max inclination and still get wellbore displacement How many wells on a lease? On each pad? Just everyday Permian drilling challenges – losses, water flows w/H2S, target TVD changes

Arial footage for Lynch A HZ (Wildfire) acreage

Lease lines and pipelines overlaid Red: Pipeline Pink: Section Line

First and last take points are acquired from Geology Red: Pipeline Pink: Section Line

First iteration - Does not take into account future wells, facilities or additional surface hazards

Planning Workflow for Consecutive Iterations High definition drone footage is added to find additional surface hazards Collaborative work w/ facilities, completions, etc… for optimal location placement FTP and LTP from Geology Drilling determines surface location Future possible wells (2 – 3 years out) added to well planning scenario Wolfcamp pad locations moved farther south to avoid collision issues and cost w/ future Spraberry wells Planning time reduced significantly

Lynch SHL Proposal Latest Iteration Original Plan for Facilities Line Discoverable Pipeline Discoverable Pipeline Facilities Reroute to Accommodate Future Spraberry Pad Lynch SHL Proposal Latest Iteration Lynch A HZ Wells (Rectangular Targets) Pad 1: #30HM, #31HM, #32HM Pad 2: #33HM,#34HM, #35HM, #36HM Pad 3: #37HM, #38HS, #39HS Pads 4, 5, 6: 12 future Spraberry wells (Yellow and White Circle Targets) Red: Pipeline, Pink: Section Line, Gold: Facilities

Opposing Laterals with offset operator Potential 28 wells in half section Apache Pads to North Drilling South Apache FTP’s Offset FTP’s Offset Pads to South Drilling North

Opposing Laterals with Offset Operator

Anti-Collision Control Three target zones combined with opposing curve wellbores (from offset operator) causes potential anti-collision and space issues Opposite side wellbores must “wrap” around opposing wellbores to drill in same vertical plane Have a detailed Anti-Collision and Survey policy Ensure everyone understands and abides by policy – field and office staff, operator and DD service company Be aware of SF and EOU for survey tools – tighten EOU’s if needed “Drill the Line” – one drifting well bore off course can have serious consequences!!!

In-Field Referencing Results

Thank You