Thermal Recovery of Bitumen From the Grosmont Carbonate Formation—Part 2: Pilot Interpretation and Development Strategy
- Daniel Yang (Laricina Energy Limited) | Moslem Hosseininejad Mohebati (Laricina Energy Limited) | Steve Brand (Laricina Energy Limited) | Caralyn Bennett (GLJ Petroleum Consultants)
- Document ID
- Society of Petroleum Engineers
- Journal of Canadian Petroleum Technology
- Publication Date
- July 2014
- Document Type
- Journal Paper
- 212 - 223
- 2014.Society of Petroleum Engineers
- 5.2.1 Phase Behavior and PVT Measurements, 5.1 Reservoir Characterisation, 5.1.1 Exploration, Development, Structural Geology, 5.1.2 Faults and Fracture Characterisation, 5.7 Reserves Evaluation, 1.6 Drilling Operations, 4.6 Natural Gas, 5.4.6 Thermal Methods, 5.7.6 Reserves Classification, 5.4.10 Microbial Methods, 5.1.7 Seismic Processing and Interpretation, 2.4.3 Sand/Solids Control, 4.3.4 Scale, 5.8.5 Oil Sand, Oil Shale, Bitumen, 5.1.9 Four-Dimensional and Four-Component Seismic, 5.6.5 Tracers, 2 Well Completion, 4.1.4 Gas Processing, 5.3.9 Steam Assisted Gravity Drainage, 5.8.7 Carbonate Reservoir
- bitumen, carbonate reservoir, thermal recovery
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Bitumen production from the Grosmont formation is enabled by bitumen-viscosity reduction caused by heating with steam, and is driven by three processes: thermal expansion, gravity drainage, and spontaneous imbibition. Gravity drainage is the dominant recovery mechanism. Maintaining a balance of injected and produced fluid is indicative of good performance. The projected steam/oil ratio (SOR) for the carbonate Grosmont formation is comparable to that of the clastic Clearwater formation; the impact of lower porosity is compensated by lower water saturation. On the basis of the experience from the pilot project, a followup development of the Grosmont formation relies on cyclic operation of injection and production. Saleski Phase 1, approved by the Alberta Energy Regulator, is designed for 1700-m3/d oil capacity from the Grosmont formation. For the first time, probable undeveloped reserves have been assigned to a fractured-carbonate bitumen reservoir. The cyclic-to-continuous steam-assisted-gravity-drainage drainage (C2C-SAGD) concept, where initial cyclic operation of individual wells is converted into continuous injection and production with well pairs as the reservoir depletion matures, intends to maximize recovery in future exploitation projects.
|File Size||8 MB||Number of Pages||12|
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