Blar i SINTEF Open på forfatter "Skorpa, Ragnhild"

Viser treff 1-5 av 5

    • Assessment of Cementitious Composites for High-Temperature Geothermal Wells 

      Pyatina, Tatiana; Sugama, Toshifumi; Moghadam, Al; Naumann, Marcel; Skorpa, Ragnhild; Feneuil, Blandine; Soustelle, Vincent; Godøy, Rune (Peer reviewed; Journal article, 2024)
      High-temperature (HT) geothermal wells can provide green power 24 hours a day, 7 days a week. Under harsh environmental and operational conditions, the long-term durability requirements of such wells require special ...

    • Digital Cement Integrity: A Methodology for 3D Visualization of Cracks and Microannuli in Well Cement 

      Vrålstad, Torbjørn; Skorpa, Ragnhild (Peer reviewed; Journal article, 2020)
      Leakages of greenhouse gases, such as methane and carbon dioxide from wells, may have considerable environmental consequences. Although much emphasis is currently put on understanding well barrier failures, and thus, ...

    • Flowability of Dry and Water Wet Barite Powder 

      Skorpa, Ragnhild; Feneuil, Blandine Fleur Prudence; von Hafenbrädl, Franz O.; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)
      Barite is added to drilling fluids as weight material to increase its density. Over time, when the drilling fluids are left static in the annulus, gravitational forces will make the barite settle out. This settled barite ...

    • Leakages Through Radial Cracks in Cement Sheaths: Effect of Geometry, Viscosity, and Aperture 

      Skorpa, Ragnhild; Vrålstad, Torbjørn (Peer reviewed; Journal article, 2022)
      Annular cement sheath is considered to be one of the most important barrier elements in the well, both during production and after well abandonment. It is however well-known that mechanical damage to the cement sheath might ...

    • Simulation of fluid flow through real microannuli geometries 

      Corina, Anisa Noor; Skorpa, Ragnhild; Sangesland, Sigbjørn; Vrålstad, Torbjørn (Peer reviewed; Journal article, 2020)
      Debonding of well cement towards casing or rock, i.e. microannuli formation, is a typical failure mode of cement barriers. Consequently, such microannuli may act as leak paths during leakages of downhole fluids such as ...