PRESE PRE SENTA NTATIO TION TITLE TITLE Anti-Collision Best - PowerPoint PPT Presentation

1 PRESE PRE SENTA NTATIO TION TITLE TITLE Anti-Collision Best Practices Developed Industry Steering Committee on for Horizontal Drilling Across Pre- Wellbore Survey Accuracy existing Horizontal Wellbores Wellbore Positioning Technical Section Erin Britton & Rachel Grande th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA

Spe peaker Info Information on Erin Britton , Sr. Drilling Engineer 2 Petroleum engineer with over 9 years energy industry experience specializing in drilling engineering with a focus in project management. Holds a B.S. in Petroleum Engineering from the University of Oklahoma and a Masters of Energy Business from the University of Tulsa. Experience across multiple basins & plays including extended reach and multilateral drilling projects. Industry Steering Committee on Rachel Grande , Sr. Geologist Wellbore Survey Accuracy Wellbore Positioning Technical Section Geologist with over 9 years energy industry experience specializing in operational geology and field development. Holds a B.S. in Geological Sciences from Ball State University. Experience in multiple basins & plays including Bakken, Powder River, and Eagle Ford. th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA

3 Anti-Collision Best Practices presented by Erin Britton and Rachel Grande th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

Anti-Collision Best Practices presented by Erin Britton and Ove vervi rview Rachel Grande Current Anti-Collision Practices • Williston Basin Overview • Geologic Considerations and Planning • Risk Management • Drilling Considerations • Stoplight Method Industry Steering Committee on • Case Studies Wellbore Survey Accuracy • Conclusion Wellbore Positioning Technical Section • th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA

5 Anti-Collision Best Practices Anti nti-Co Colli lisi sion presented by Erin Britton and Rachel Grande Indus ustry ry V View Stand tandard ard vi view errs w errs towards towards avoidan ance men e mentality: Total Avoidance • Azm. Avoidance • Limited support and documentation for alternative processes when avoidance is not an option. th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

6 Anti-Collision Best Practices Anti nti-Co Colli lisi sion C n Case se S Study presented by Erin Britton and Rachel Grande Williston Basin 13,000 vertical wells, • 15,000 horizontal wells, • 1,000 re-entry/directional wells. • Developed for horizontal drilling across pre-existing horizontal wellbores in the Williston Basin. Drilled as close as 10 feet wellbore - wellbore • 45 Miles th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

7 Anti-Collision Best Practices Geologic ic C Consi sidera rati tions ns presented by Erin Britton and Rachel Grande Anti ti-Collision P n Progra ram C Constra raint nts Laterally Continuous Middle Bakken • Formation ~ 20’-80’ Well Control • Quality Data • Clear Steering Markers • Gamma Three Forks ~15’-65’ Resistivity th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

8 Anti-Collision Best Practices Geologic Pl Planning presented by Erin Britton and Rachel Grande Anti ti-Co Collisio llision M Methodo dolo logy gy Reinterpretation • * Profiles * Structure Organization of • Stratigraphic position Wellbore Placement • Target Selection • th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

9 Anti-Collision Best Practices Drilling Cons Drilli Conside deration ions presented by Erin Britton and Rachel Grande Risk M Ri sk Management Pro Program Poten otenti tial R Risks ks Risk Matrix Impact vs. Probability • Common Indicators Operational Parameters • Geologic • Directional/Survey • Survey Error Ellipse of Uncertainty th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

10 Anti-Collision Best Practices Drilling U ing Unce ncerta tainty inty presented by Erin Britton and Rachel Grande Ellipsoi oids o of Uncer ertai ainty Maj ajor Con Concer ern A n Affecting ng Anti-Col Collision on Planni anning ng Survey Error: MWD Error and • interference concerns. Azimuth Uncertainty Inclination Uncertainty Surface Location Uncertainty Ellipse of Uncertainty: Expanding ellipse • from surface onwards. Netwas Group Oil, 2017 th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

11 Anti-Collision Best Practices presented by Erin Britton and Mitiga gati ting ng R Risk & & Acc ccounting unting for Err rror Rachel Grande Risk M Manag agemen ent M Meet ets G Geol olog ogy Ability to simplify risk with the combination of drilling & geologic considerations. E xpected Structure • Apparent Dip • Confirmation of “Y” or TVD direction Distinct Stratigraphic Markers • Ellipse of uncertainty becomes plane of uncertainty with no expansion in the Y direction. th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

12 Anti-Collision Best Practices presented by Erin Britton and Stopli toplight Me Meth thod od Rachel Grande A Dis Disci ciplined A App pproach Multidisciplinary a Mul approach us using: Geologic Considerations • Operations Best Practices • Risk Management • Geologic overlapping target windows by color zone implemented across the planned wellbore based on the Existing Wellbore Stratigraphic Placement risk management plan ● Red : High Risk considerations. ● Orange: Med. Risk ● Yellow: Low Risk ● Green: No Risk th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

13 Anti-Collision Best Practices presented by Erin Britton and Stopli toplight Me Meth thod od Rachel Grande Risk Pa Ri sk Parameters Red: High Risk Controlled Operations & “high alert” communication • Precise Steering target required • Orange: Medium Risk Controlled operations and heighted communication • procedures Overlap zone for steering adjustments • Yellow: Low Risk Standard operations & communication procedures • Begin steering considerations • Green: No/Low Risk th Gener 48 th 48 General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

14 Anti-Collision Best Practices Case Stu Ca tudy dy A A presented by Erin Britton and Rachel Grande Stopligh plight M Meth thod d Drilled 32’ above existing wellbore. 23’ Total Thickness th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

15 Anti-Collision Best Practices Ca Case Stu tudy dy B B presented by Erin Britton and Rachel Grande Stopligh plight M Meth thod d Drilled across 3 existing laterals. ● Drilled 26’ below wellbore #1. ● Drilled 34’ below wellbore #2. ● Drilled 8’ below wellbore #3. #3 #2 #1 Wellbore #1 Wellbore #2 73’ Total Thickness Wellbore #3 th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

16 Anti-Collision Best Practices Ca Case Stu tudy dy C C presented by Erin Britton and Rachel Grande Stopligh plight M Meth thod d Drilled across 3 existing laterals. ● Drilled 20’ below wellbore #1. ● Drilled 36’ below wellbore #2. ● Drilled 15’ below wellbore #3. #2 #1 Wellbore #2 #3 48’ Total Thickness th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section

17 Anti-Collision Best Practices Anti nti-colli ollision ion M Mov ovin ing Forw Forward presented by Erin Britton and Rachel Grande Advan ancem emen ent i in Prac actices es Matur ature Bas e Basin D n Dev evel elop opment nt requires industry progression towards complex wellbore trajectories with significant collision concerns. Williston Basin anti-collision wells historical percent: 2010 ~ < 0.1% ● 2016 ~ 4.25% ● th Gener 48 48 th General M Mee eeting ng Sept 27t 27th, 2018 2018 Dallas, U USA Wellb lbore Posit itionin ing T Technic ical S Section