Suncor's Lewis SAGD Project Signals Shift From Mining to In-Situ at Base Plant
Suncor Energy is moving forward with a plan to convert its Base Plant feedstock from mostly mined bitumen to mostly in-situ SAGD production by 2036, Oil Sands Magazine reports, detailing a phased buildout at the company’s Lewis lease east of Base Plant.
Market Impact
The transition responds to the planned wind-down of mining activity at Suncor’s Millennium and North Steepbank mines. In their place, emulsion from a new SAGD development at Lewis will feed Base Plant’s existing extraction and upgrading infrastructure. Suncor first received regulatory approval for Lewis in March 2021 under a four-phase plan, with each Central Processing Facility (CPF) rated at 40,000 bbl/day for a total capacity of 160,000 bbl/day, enough to sustain more than 40 years of development.
Suncor has since filed an amendment eliminating standalone CPFs for Phases 1 and 2. Instead, power and steam for those well pads will come from Base Plant, and a new Field Terminal at Lewis will degas emulsion before pumping it to Base Plant for processing through Plant 86, the facility currently used for Millennium’s primary extraction. Bitumen capacity per phase stays at 40,000 bbl/day, and Phase 3 and 4 CPF plans are unchanged for now. Base Plant will also get a new Water Treatment Facility, sourcing make-up water from the existing tailings pond rather than fresh water.
Assuming regulatory approval by the end of 2026, Suncor expects early works, including site clearing, rough grading and road construction, to start in 2027. Construction of the Water Treatment Facility, Lewis Field Terminal and initial well pads is planned for 2029, with Lewis Phase 1 startup targeted for 2032.
What It Means for Subcontractors
- Civil contractors should watch for early works packages (clearing, grading, road construction) tied to 2027 startup at the Lewis lease, pending regulatory approval expected by end of 2026.
- Pipeline and E&I subs should track the 2029 construction window for the new Base Plant Water Treatment Facility and the Lewis Field Terminal, both critical to moving degassed emulsion from Lewis to Plant 86.
- Mechanical and process trades tied to Plant 86 should expect reconfiguration work as one of two Sep Cell trains shifts to treating Lewis emulsion while mined ore processing continues on the second train.
- Camp-support and workforce logistics providers should plan around a multi-year buildout stretching from 2027 early works through 2032 Phase 1 startup, with Phases 3 and 4 still to come after that.
- Water treatment and tailings-handling subs should note the plan to source make-up water from Suncor’s existing Base Plant tailings pond, which will require new de-oiling and treatment infrastructure ahead of Lewis startup.
