Pore-to-Core EOR Upscaling for CO2 Foam for CCUS
- Arthur Uno Rognmo (University of Bergen) | Sunniva Brudvik Fredriksen (University of Bergen) | Zachary Paul Alcorn (University of Bergen) | Mohan Sharma (University of Stavanger) | Tore Føyen (University of Bergen and SINTEF Industry) | Øyvind Eide (University of Bergen) | Arne Graue (University of Bergen) | Martin Fernø (University of Bergen)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- December 2019
- Document Type
- Journal Paper
- 2,793 - 2,803
- 2019.Society of Petroleum Engineers
- micromodel, CCUS, foam flow, EOR, CO2-foam
- 6 in the last 30 days
- 177 since 2007
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This paper presents an ongoing CO2-foam upscaling research project that aims to advance CO2-foam technology for accelerating and increasing oil recovery, while reducing operational costs and lessening the carbon footprint left during CO2 enhanced oil recovery (EOR). Laboratory CO2-foam behavior was upscaled to pilot scale in an onshore carbonate reservoir in Texas, USA. Important CO2-foam properties, such as local foam generation, bubble texture, apparent viscosity, and shear-thinning behavior with a nonionic surfactant, were evaluated using pore-to-core upscaling to develop accurate numerical tools for a field-pilot prediction of increased sweep efficiency and CO2 utilization. At pore-scale, high-pressure silicon-wafer micromodels showed in-situ foam generation and stable liquid films over time during no-flow conditions. Intrapore foam bubbles corroborated high apparent foam viscosities measured at core scale. CO2-foam apparent viscosity was measured at different rates (foam-rate scans) and different gas fractions (foam-quality scans) at core scale. The highest mobility reduction (foam apparent viscosity) was observed between 0.60 and 0.70 gas fractions. The maximum foam apparent viscosity was 44.3 (+/–0.5) mPa·s, 600 times higher than that of pure CO2, compared with the baseline viscosity (reference case, without surfactant), which was 1.7 (+/–0.6) mPa·s, measured at identical conditions. The CO2-foam showed shear-thinning behavior with approximately 50% reduction in apparent viscosity when the superficial velocity was increased from 1 to 8 ft/D. Strong foam was generated in EOR corefloods at a gas fraction of 0.70, resulting in an apparent viscosity of 39.1 mPa·s. Foam parameters derived from core-scale foam floods were used for numerical upscaling and field-pilot performance assessment.
|File Size||1 MB||Number of Pages||11|
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