IMPACT OF ADVANCED COMPLETIONS ON RESERVOIR AND PRODUCTION PERFORMANCE S. Betancourt, R. van Delden, C. Lucas, Y. Jalali, J. Algeroy Schlumberger Completion Technologies

AGENDA Commingled Production Applications Improved Reservoir Drainage 8/28/2018 AGENDA Commingled Production Applications Case study 1 - North Sea Case study 2 - Wytch Farm Case study 3 - Oseberg Case study 4 - Troll Improved Reservoir Drainage Conclusions

8/28/2018 Case Study 1 - North Sea TRFC-H FloWatcher TRFC-H

Pressure and Water Production Performance 8/28/2018 Pressure and Water Production Performance

Oil Production Performance 8/28/2018 Oil Production Performance

Wytch Farm (Water Control) 8/28/2018 Wytch Farm (Water Control) Qo 16000 14000 12000 10000 8000 6000 4000 2000 Time (Days) 0 400 800 1200 1600 2000 commingled w/ control commingled w/o control sequential Multi-position Flow Control Valves

Oseberg (Gas Control) Production, m3/d commingled w/ control 8/28/2018 Oseberg (Gas Control) Production, m3/d GOC WOC commingled w/ control sequential production 0 200 400 600 800 1000 1200 Time, days

Troll (Natural Gas Lift) 8/28/2018 Oil Production (bpd)

Coning in Horizontal Wells 8/28/2018 Coning in Horizontal Wells gas pressure flowrate oil heel toe water

Coning in Horizontal Wells 8/28/2018 Coning in Horizontal Wells Water Drive Gascap Drive Dual Drive Multiple Well (top view) *Yeten et al (SPE 68077, Bahrain) & Sinha et al (SPE 68635, Jakarta)

Completion with Downhole Flow Control 8/28/2018 Completion with Downhole Flow Control Downhole Flow Control DPmax(along the well)-5.6 psia Maximum Drawdown- 7.3psia Conventional Completion DPf (Toe to Heel)-34.5 psia Maximum Drawdown- 16.5 psia

Improved Drainage Applications 8/28/2018 Improved Drainage Applications *Yeten et al (SPE 68077, Bahrain) & Sinha et al (SPE 68635, Jakarta)

8/28/2018 CONCLUSIONS Advanced Completions in commingled production applications can: accelerate production, control GOR and watercut. Drainage in reservoirs with coning tendencies can be improved by delaying breakthrough time, and improving sweep. Also beneficial in field development.