Density unstable fluid displacement in vertical annuli
M. Ghorbani,
R. Zhang,
K. E. T. Giljarhus
et al.
Abstract:We study displacement flows involving pairs of Newtonian and shear-thinning fluids in vertical annular geometries using experimental and computational methods. This investigation is motivated by the primary cementing of casing strings, which is part of the well construction operation. In displacement scenarios that involve density-unstable fluid pairs, it is well-known that buoyancy can increase the inter-mixing between fluids and hence contaminate cementing fluids due to gravity-driven instabilities. Our stud… Show more
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